DE19956985B4 - Data communication terminal and method for its control - Google Patents

Abstract

A data communication terminal comprising:
a main control unit (MS) that controls operations of the data communication terminal;
more than one data communication control unit (FP, FI, TS) operating independently and each associated with a terminal communication mode (telephone, G3-Fax, G4-Fax); and
a power source unit (PS) supplying a first power (SD1) in the low power consumption mode and a second power (SD2) in the normal power consumption mode to the main control unit (MS) and respectively to the data communication control units (FP, FI, TS); in which
the main control unit (MS) and the data communication control units (FP, FI, TS) are respectively provided with power saving control units (11, 28, 43) each independently transitioning between a normal power consumption mode and a main power unit low consumption mode (FIG. MS) and the data communication control units (FP, FI, TS) by the first (SD1) and second (SD2) power they receive from the power source unit (PS), respectively; and
wherein, when a call operation is performed, the power-saving control unit (11) of the main control unit (MS) changes from the low-power consumption mode of the main control unit (MS) to the normal-power consumption mode of the main control unit (MS), and that ...

Description

The The present invention relates to a data communication terminal comprising a System controller for controlling operations of the device and at least a data communication control unit, and further relates a method for controlling such a data communication terminal.

at a conventional one Data communication terminal, such as a fax machine, will the power consumption mode or power consumption mode automatically from a power consumption mode to a low power consumption mode switched after a certain amount of time passed in the wait state is. When the data communication terminal detects an event, such as for example, a call operation or a receive operation the power consumption mode of the low-power consumption mode back to the normal power consumption mode, so a call operation or receive operation. In this way, the power consumption of the data communication terminal can be in the waiting state limited so that the operating costs of the data communication terminal are limited can be.

meanwhile were fax machines developed with a variety of communication features. such Faxes can with a communication control unit for the public switched telephone network or Telephone network (hereinafter referred to as "PSTD communication control unit"), which performs a G3 fax communication by using a PSTN (public switched network or telephone network), and they can communicate with an ISDN communication control unit equipped which performs a G3 / G4 facsimile communication by using an ISDN (Integrated Services Digital Network) is used. However, it is also necessary to limit the power consumption in those fax machines that have a variety of communication functions.

After this a certain amount of time expired in the waiting state of a fax machine is, which has a variety of communication functions is the normal power consumption mode from the normal power consumption mode switched to the low power consumption mode. When a Calling operation or a receiving operation in the PSTN communication control unit or the ISDN communication control unit is detected, the power consumption mode returns from the low-power consumption mode to the normal power consumption mode, whereby a call operation or a receive operation is performed.

The Problem with the conventional one Method is that when the PSTN communication control unit receives a reception detected, not just the PSTN communication control unit, but also the ISDN communication control unit connected to this Time is not working, from the low power consumption mode is switched to the normal power consumption mode. This inevitably leads to a bad result when saving or saving power.

Out JP 10-224535 is a multi-component digital device is known in which an energy-saving operation should be possible. A first power supply unit is there for a system control. A second power supply unit is for a fax control, and a third power supply unit is for a call detection circuit. The power source units are turned on or off via relays. They are powered by an AC driver card with 100 V AC. You can not choose between a normal power mode and a low power mode. Communication between the power source units does not take place.

Out JP 05-219263 a communication terminal is known which can be connected to both a conventional analog telephone network and a digital telephone network (ISDN).

task the invention is to provide a data communication terminal, which has a more efficient power saving function. Likewise, one should corresponding method for controlling such a data communication terminal is provided become.

above Task is through the objects the independent one claims solved. Advantageous developments emerge from the dependent claims.

Advantageously, there is provided a data communication terminal comprising a system control unit that collectively controls the operation of the data communication terminal and a data communication control unit or a plurality of data communication control units. The system control unit and the data communication control units are respectively provided with power saving control units, each of which is switched from a normal power consumption mode (a normal consumption power consumption mode) to a low power consumption mode Consumption mode in which low power is consumed) changes, and each clears the low power consumption mode and returns to the normal power consumption mode when an event occurs. Each of the power saving control units instructs the power saving control unit of the system control unit or at least one of the data communication control units to exit the low power consumption mode depending on the type of each event occurring every corresponding object or each corresponding object that has occurred has occurred or resulted. An object here is in particular a data communication terminal to be controlled, such as a G3 fax, G4 fax or telephone.

Advantageous Also provided is a data communication terminal having a System controller that controls operations of the data communication terminal, and the one or more data communication control unit or many data communication control units. In this Data communication terminal, become the system controller and the data communication controllers each provided with power-saving control units, each changes independently from a normal power consumption mode to a low power consumption mode and clears or leaves the low power consumption mode and returns to the normal power consumption mode back, when an event occurs. When a call operation is performed, clears the power-saving control unit its low-power consumption mode. The power saving unit of the system controller then commands the Power saving control unit of at least one of the data communication control units, which correspond to a communication mode by the call operation is designated to clear its low power consumption mode.

The Data communication control units in the data communication terminal may be an ISDN data communication control unit containing an ISDN as a transmission path used. In the low power consumption mode, the power saving control unit sets the ISDN data communication control unit an ISDN Layer 1 control unit in a release state for detecting a reception. If the ISDN layer I1 control unit detects a reception, clears the power-saving control unit the ISDN data communication control unit their low-power consumption mode. When the ISDN data communication controller receives a reception therein in accordance acknowledged with an ISDN Layer 3 procedure signal, the power saving controller commands the ISDN data communication control unit of the power saving control unit the system controller, the low-power consumption mode Clear.

The Data communication control units in the data communication terminal may have a PSTN data communication control unit which includes a network controller and which is a PSTN as a transmission path used. In the low-power consumption mode, the power-saving control unit sets the PSTN data communication control unit the network control unit in a release state for detecting a reception. When the network control unit receives a reception detects, clears the power saving control unit of the PSTN data communication control unit their low power consumption mode. When the PSTN data communication control unit confirmed a reception in it The power saving control unit of the PSTN commands the power saving control unit the system controller to the low-power consumption mode Clear.

The Data communication control unit in the data communication terminal, can both an ISDN data communication control unit, which is an ISDN as a transmission path used as well as a PSTN data communication unit, the one Network control unit includes and a PSTN as a transmission path used, included. In the low power consumption mode the power-saving control unit of the ISDN data communication control unit, an ISDN Layer 1 control unit in a release state for detecting a reception. If the ISDN Layer 1 control unit detects a reception, clears the Power saving control unit of the ISDN data communication control unit their low power consumption mode. If the ISDN data communication control unit a reception in it in accordance acknowledged with an ISDN Layer 3 procedure signal, the power saving controller commands the ISDN data communication control unit the power control unit of the system control unit, the low power consumption mode to delete. Meanwhile, in the low-power consumption mode, the power-saving control unit occupies the PSTN data communication control unit the network control unit in a release state for detecting a reception. The power saving control unit of the PSTN data communication control unit clears the same Low power consumption mode when the network control unit detects a reception, and commands the power saving control unit the system controller to the low-power consumption mode Clear, if the PSTN data communication control unit confirmed a receipt in it.

Advantageously comprises a Datenkommunikati a system controller that controls operations of the data communication terminal; one or more data communication controllers; and a telephone control unit for telephone communication. In this data communication terminal, the system control unit and the data communication control units are respectively provided with power saving control units. Each of the power-saving control units shifts to a low-power consumption mode regardless of a normal-power consumption mode, and clears the low-power consumption mode, and returns to the normal-power consumption mode when an event occurs. When one of the data communication control units detects a reception, the power saving control unit of the data communication control unit clears the low power consumption mode. When the data communication control unit detects a telephone call reception, a telephone communication using the telephone control unit is executed.

Advantageous a data communication terminal comprises a system control unit, controls the operations of the data communication terminal, a number or Variety of data communication control units and a telephone control unit for telephone communications. In the data communication terminal, the telephone control unit includes a Registration unit registering the type of one of the data communication control units or records for a telephone communication is to be used. The system controller and the data communication controllers are each provided with power saving controllers Mistake. Each of the power-saving control units changes independently of a normal power consumption mode to a low power consumption mode and clears the low power consumption mode and returns to the normal power consumption mode back, when an event occurs. The telephone control unit commands the Power saving control unit of the data communication control unit, whose type registered in the registration unit, the low-power consumption mode too Clear, if a telephone call operation involving the registered data communication control unit used, performed becomes. In a case where the type of line being used is new is designated, the telephone control unit commands the power saving control unit the data communication control unit, the newly designated Line equals to clear the low power consumption mode by doing so a communication is carried out the data communication controller of the newly designated line used.

at This data communication terminal, the data communication control unit, their power-saving control unit through the power saving control unit the telephone control unit has been commanded to use the low power consumption mode Clear, comprise an indicator unit indicating that the data communication control unit is up in use.

As well may, when a communication switching command or communication change command during a Communication operation that uses the phone control unit is output, the power saving control unit of the telephone control unit command the system controller power saver control unit, the low power consumption mode to delete. The data communication control unit after the communication change then the system controller will command a communication operation to start.

Advantageous there is also provided a method of controlling a data communication terminal, the one system control unit for controlling operations of the data communication terminal and one or multiple or many data communication controllers. In this Methods control the system controller and the data communication controllers the power consumption mode independent of each other. Each of the system controllers and the data communication control unit changes independently of a normal power consumption mode to a low power consumption mode and delete that Low power consumption mode and returns to the normal power consumption mode back if an event occurs. The system controller and the data communication controllers also command the system controller or at least one of the Data communication controllers use the low power consumption mode to delete, in dependence of the type of each event.

The present invention also provides a method of controlling a data communication terminal comprising a system controller for controlling the data communication terminal and one or more or many data communication controllers. In this method, the system controller and the data communication controllers independently control the power consumption mode. The system control units and the data communication control units each change from a normal power consumption mode to a low power consumption mode and respectively clear the low power consumption mode and each return to the normal power consumption mode when an event occurs. When a call operation is performed, the system control clears is the low-power consumption mode thereof, and commands the data communication control unit corresponding to a communication mode designated by the call operation to cancel the low-power consumption mode.

at this method can the data communication control units in the data communication terminal an ISDN data communication control unit containing an ISDN as a transmission path. at the low power consumption mode the ISDN data communication control unit sets an ISDN Layer 1 control unit a release state to detect a reception. The ISDN data communication control unit then clears the low power consumption mode when the ISDN Layer 1 control unit detects a receipt, and commands the system controller to to clear the low-power consumption mode when receiving in accordance is confirmed with an ISDN Layer 3 procedure signal.

at this method can the data communication control units a PSTN data communication control unit containing a network controller and a PSTN as a transmission path or transmission path used. In the low power consumption mode, the PSTN data communication control unit sets the network control unit in a release state for detecting of a reception. The PSTN data communication control unit clears the low power consumption mode when the network control unit detects a reception and commands the system control unit, the Low power consumption mode to clear when the PSTN data communication control unit a receipt confirmed in it.

at this method can the data communication control units both an ISDN data communication control unit, using an ISDN as a transmission path, as also a PSTN data communication control unit that uses a PSTN as a a transmission path or transmission path used and a network control unit includes, included. In the low power consumption mode the ISDN data communication control unit an ISDN Layer 1 control unit in a release state for detecting a reception. The ISDN data communication control unit clears the Low power consumption mode when the ISDN Layer 1 controller has a Receive detected, and commands the system controller, the low-power consumption mode to delete, when the ISDN data communication control unit has a reception therein in accordance with an ISDN Layer 3 procedure signal approved. In the low power consumption mode, the PSTN data communication control unit sets the network control unit in a release state for detecting of a reception. The PSTN data communication control unit clears the low power consumption mode when the network control unit detects a receipt, and commands the system controller to Low power consumption mode to clear when the PSTN data communication control unit a receipt confirmed in it.

Advantageous there is also provided a method of controlling a data communication terminal, a system control unit for controlling operations of the data communication terminal, a or multiple or many data communication controllers and a telephone control unit for telephone communications includes. In this method, the system controller and control the data communication control unit the power consumption mode independently, so that the System controller and the data communication controllers each independent of a normal power consumption mode to a low power consumption mode change, and each independently delete the low-power consumption mode and independently of this Normal power consumption mode return when an event occurs. If one of the data communication controllers has a Reception detected, clears the data communication control unit the low power consumption mode. When the data communication controller receives the reception as a Phone Reception detects, a communication operation that the Telephone control unit used, executed.

Advantageously, there is provided a method of controlling a data communication terminal comprising a system control unit for controlling operations of the data communication terminal, a plurality of data communication control units, and a telephone control unit for telephone communications. In this method, the type of the data communication control unit to be used for a telephone communication is recorded in the telephone control unit. The system control unit and the data communication control unit independently control the power consumption mode, so that the system control unit and the data communication control unit change from a normal power consumption mode to a low power consumption mode and independently clear the low power consumption mode respectively and independently return to the normal power consumption mode, respectively returns when an event occurs. If a phone call operation containing the recorded or registered data communication control unit is used, the telephone control unit commands the data communication control unit, whose type is recorded to clear the low-power consumption mode. When the type of line being used is renamed, the telephone control unit commands the data communication control unit corresponding to the newly designated line to clear the low power consumption mode, thereby performing communication that the data communication control unit executes designated line used.

at In this method, the data communication control unit, the commanded by the telephone control unit, the low power consumption mode to delete, be provided with a display unit indicating that the data communication control unit in Use is. Likewise, if a communication change command while a communication operation is issued, wherein the telephone control unit is used, the telephone control unit of the system control unit command to clear the low power consumption mode. The Data communication control unit after changing the communication the system controller commands with a communication operation to start.

Advantageous There is provided a data communication terminal which has the following comprising: a system controller that controls operations of the data communication terminal and performing data communication by using a first communication line is used; and a data communication control unit performs a data communication, by using a second communication line. In this Data communication terminal become the system controller and the data communication controller respectively provided with power-saving control units. Each of the power saving control units changes independently from a normal power consumption mode to a low power consumption mode and clears the low power consumption mode and returns to the normal power consumption mode when an event occurs. When a call operation is performed, clears the system controller power saving control unit their low power consumption mode. When a communication mode designated by the call operation The first communication line involves directing the power saving control unit the system controller is not the power saving controller of the Data communication control unit, the low power consumption mode to delete. When the designated communication mode is the second communication line employs the power-saving control unit the system control unit of the power saving control unit of the data communication control unit, to clear the low power consumption mode. In this data communication terminal is the first communication line is a PSTN line and in the second communication line to an ISDN line.

Advantageous there is further provided a method of controlling a data communication terminal, comprising: a system controller that performs operations of the data communication terminal controls and performs a data communication by a first communication line is used; and a data communication control unit that performs data communication by a second communication line is used. In this process control the system controller and the data communication controller the power consumption mode independently, so that the System control unit and / or the data communication control unit independently from a normal power consumption mode switch to a low power consumption mode and the low power consumption mode Clear and return to the normal power consumption mode when an event occurs. When a delete operation is performed, clears the system controller is the low power consumption mode. The System controller commands the data communication controller the low power consumption mode to delete, if a communication mode designated by the call operation is, the second communication line involves or uses, but does not command the data communication controller, the low power consumption mode to delete, when the designated communication mode is the first communication line includes or uses. This procedure is at the first communication line to a PSTN line and at the second communication line to an ISDN line.

Further Advantages and features of the present invention are in the following description. It can have different characteristics different embodiments be combined with each other.

1 Fig. 10 is a block diagram showing the construction of a first embodiment of a data communication terminal of the present invention;

2 FIG. 10 is a block diagram showing an embodiment of the structure of a main control unit. FIG MS shows;

3 Fig. 10 is a block diagram showing an embodiment of the structure of a G3 facsimile communication unit FP;

4 Fig. 10 is a block diagram showing an embodiment of the construction of a G4 facsimile communication unit FI;

5 Fig. 10 is a block diagram showing an embodiment of the structure of a telephone unit TS;

6 FIG. 10 is a flowchart of one embodiment of a control process of the change from the normal power consumption mode to the low-power consumption mode and the return from the low-power consumption mode to the normal-power consumption mode; FIG.

7 Fig. 10 is a flowchart of an embodiment of an operation in a case where the user operates the key of the operation control unit of the main control unit, thereby causing a key operation event;

8th Fig. 10 is a flowchart of a part of an embodiment of an operation performed by the main control unit in a case where an off-hook state is detected when a user picks up the receiver;

9 FIG. 10 is a flowchart of another part of the embodiment of FIG 8th ;

10 FIG. 12 is a flowchart of the remaining part of the embodiment of FIG 8th and 9 ;

11 Fig. 10 is a flowchart of a part of an embodiment of an operation in a case where reception is detected in the G3 facsimile communication unit;

12 FIG. 10 is a flowchart of the remaining part of the embodiment of FIG 11 ;

13 Fig. 10 is a flowchart of an embodiment of an operation in a case where reception is detected in the G4 facsimile communication unit;

14 Fig. 10 is a block diagram of a second embodiment of a data communication terminal of the present invention;

15 Fig. 10 is a flowchart of an embodiment of an operation in a case where the user operates the key of the operation control unit of the main communication unit, thereby causing a key operation event;

16 Fig. 10 is a flowchart of a part of an embodiment of an operation performed by the main communication unit in a case where an off-hook state is detected when the user picks up the receiver;

17 FIG. 10 is a flowchart of another part of the embodiment of FIG 16 ;

18 FIG. 12 is a flowchart of the remaining part of the embodiment of FIG 16 and 17 ;

19 Fig. 10 is a flowchart of a part of an embodiment of an operation in a case where reception by a PSTN reception detection unit is detected, and a G3 facsimile reception process is executed;

20 FIG. 12 is a flowchart of the remaining part of the embodiment of FIG 19 ; and

21 Fig. 10 is a flowchart of one embodiment of an operation in a case where an ISDN reception detection unit detects reception from the ISDN and the G4 facsimile communication unit performs a G4 facsimile reception process.

The The following is a description of embodiments of the present invention Invention, with reference to the attached Drawings reference is made.

1 Fig. 10 is a first embodiment of a data communication terminal of the present invention. In this embodiment, the present invention is applied to a facsimile machine. This facsimile apparatus comprises: a main control unit MS for providing a user interface and performing image information processing which generates, stores and outputs the image information; a telephone unit TS for carrying out telephone communications; a G3 facsimile communication unit FP for carrying out G3 facsimile communications using a PSTD or an ISDN; a G4 facsimile communication unit FI for carrying out G3 or G4 facsimile communications; and a power source unit PS. The power source unit PS supplies a power SD1 in the low power consumption mode and a power SD2 in the normal power consumption mode to the main control unit MS, the telephone unit TS, the G3 facsimile communication unit FP, and the G4 facsimile communication unit FI.

The Main control unit MS, the telephone unit TS, the G3 fax communication unit FP and the G4 fax communication unit FI exchange information which relates to the power consumption mode, via a Bus line BSp, and exchange other information, such as Example communication data and control information, via a Bus line BSc.

The Telephone unit TS exchanges analog signals for communication the G3 fax communication unit FP and the G4 facsimile communication unit FI if necessary is. If a communication mode using ISDN is selected, The G3 facsimile communication unit FP exchanges analog modem signals with the G4 fax communication unit FI off.

The Main control unit MS, the telephone unit TS, the G3 fax communication unit FP and the G4 fax communication unit FI work independently of each other. The power consumption mode of each of these units is determined by the normal power consumption mode changed to the low power consumption mode, or is of the Low power consumption mode to the normal power consumption mode changed if necessary.

If the fax machine performs a G3 fax communication, By using the PSTN, the main control unit MS operates and the G3 facsimile communication unit FP with each other while the telephone unit TS and the G4 facsimile communication unit FI are in a standby state or wait state.

If the fax machine performs a G4 fax communication, by using the ISDN, the main control unit MS operates and the G4 facsimile communication unit FI cooperatively, while the Telephone unit TS and the G3-Faxkommunikationseinheit FP in the wait state or standby state.

If the fax machine performs a G3 fax communication, by using the ISDN, the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI cooperatively with each other while the telephone unit TS is in the standby state located.

If the fax machine performs a telephone communication, by using the PSTN, the main control unit MS, the telephone unit TS and the G3 fax communication unit FP cooperative with each other while the G4 fax communication unit SI is in the standby state.

If the fax machine performs a telephone communication, by using the ISDN, the main control unit MS, the telephone unit TS and the G4 fax communication unit FI cooperative with each other while the G3 fax communication unit FP is in the wait state.

2 shows an embodiment of the structure of the main control unit MS. In 2 runs a system controller 1 various processes, such as a control process for each component of the fax machine. A system memory 2 stores data for the system controller 1 necessary to execute a control program and a process program, and serves as a workspace for the system controller 1 , A parameter memory 3 inherently stores information about various types of this fax machine, such as an ID number. A clock circuit 4 outputs the current time information.

A scanner 5 reads original pictures with a predetermined resolution. A printer 6 Records images and outputs them at a predetermined resolution. An operation control unit 7 is used to operate the fax machine and includes operation buttons and various types of displays.

An encoding-decoding unit 8th compresses image signals into codes and decodes the encoded and compressed image information back into the original image signals. An image storage device 9 stores the encoded and compressed image information on a data carrier. An external interface circuit 10 exchanges the information of various kinds with the telephone unit TS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI via the bus line BSc.

A power source control unit 11 provides the low power consumption mode power SD1 or the normal power consumption mode power SD2 from the power source unit PS to the elements of the main control unit MS as low power consumption mode power SD1a or normal power power SD2a. Consumption mode, depending on the power consumption mode. The power source control unit 11 Also exchanges the information concerning the power consumption mode with the telephone unit SC, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI via the bus line BSp. Here, the low-power consumption mode power SD1a becomes only the operation control unit 7 supplied, so that the operation control unit 7 can operate in the low power consumption mode. Likewise, the operation control unit sends 7 a si gnal to a key operation for the power source control unit 11 display. The power source control unit 11 may operate in either the low power consumption mode or the normal power consumption mode by means of the power SD1 and the power SD2 supplied from the power source unit PS, respectively. In the normal power consumption mode, the power source control unit provides 11 both the power SD1a of the low power consumption mode and the power SD2a of the normal power consumption mode to each element of the main control unit MS. In the low power consumption mode, the power source controller provides 11 only the power or the Stron SD1a of the low power consumption mode to the appropriate elements of the main control unit MS.

The system controller 1 , the system memory 2 , the parameter memory 3 , the clock circuit 4 , the scanner 5 , the plotter or printer 6 , the operation control unit 7 , the coding / decoding unit 8th , the image storage device 9 , the circuit 10 for an external interface and the power source control circuit 11 are with an internal bus 12 connected and the data exchange under these elements is usually via the internal bus 12 executed.

3 shows an embodiment of the construction of the G3 facsimile communication unit FP.

In 3 runs a G3 fax communication control unit 21 controls the entire operation for the G3 facsimile communication unit FP and exchanges image information, the exchange being performed in accordance with predetermined G3 facsimile communication control procedures. A cache 22 temporarily stores image information to be sent or received. An encoding / decoding unit 23 encodes picture information in a G3 facsimile coding mode and decodes picture information which has been encoded in the G3 facsimile coding mode. An indicator unit or display unit 24 shows the state of the G3 facsimile communication unit FP. For example, the indicator unit shows 24 indicate that the G3 fax communication unit FP is in a selected state.

A network control device 25 is used to connect the G3 facsimile communication unit FP to the PSTN and has an automatic transmission / reception function. A G3 fax modem 26 Used to receive a G3 fax modem function, it has the function of a low-speed modem, such as a V.21 modem, to exchange the signals for the transmission procedures, and has the function of a high-speed modem, such as for example, a V.17 modem, a V.34 modem, a V.29 modem, or a V.27-ter modem to exchange image information mainly.

An external interface circuit 27 exchanges necessary information about various types of the main control unit MS, the telephone unit TS and the G4 facsimile communication unit FI via the bus line BSc.

A power source control unit 28 provides the power SD1 and / or the power SD2 from the power source unit PS to the elements of the G3 facsimile communication unit FP, depending on the power consumption mode. The power SD1 is supplied as a low-power consumption mode power SD1b, and the power SD2 is supplied as a low-power consumption mode power SD2b. The power source control unit 28 also exchanges the information concerning the power consumption mode with the main control unit MS, the telephone unit TS and the G4 facsimile communication unit FI via the bus line BSp. Here, the low-power consumption mode power SD1b becomes only a reception detection circuit in the network control device 25 supplied, so that the reception detection circuit in the network control device 25 can operate in the low power consumption mode. Likewise, the network controller sends 25 a signal to detect the reception of the power source control unit 28 display. The power source control unit 28 For example, in either the low-power consumption mode or the normal-power consumption mode, the power SD1 and SD2 may be supplied from the power source unit PS. In the normal power consumption mode, the power source control unit provides 28 both the low-power consumption mode power SD1b and the low-power consumption mode power SD2b, to each element of the G3 facsimile communication unit FP. In the low power consumption mode, the power source control unit supplies 28 only the low power consumption mode power SD1b to appropriate elements of the G3 facsimile communication unit FP.

The G3 fax communication control unit 21 , the cache 22 , the coding / decoding unit 23 , the indicator unit 24 , the network control device 25 , the G3 fax modem 26 , the circuit 27 for the external interface and the power source control unit 28 are with an internal bus 29 connected, and the data exchange among these elements is via the internal bus 29 executed.

The data exchange between the network control device 25 and the G3 fax modem 26 is executed directly. The G3 fax modem 26 exchanges modem signals with an analog input / output terminal of the G4 facsimile communication unit FI. Likewise, the network controller exchanges 25 Communication signals with the telephone unit TS off.

4 shows an embodiment of the structure of the G4 facsimile communication unit FI.

In 4 runs a G4 fax communication control unit 31 performs an overall operation control for the G4 facsimile communication unit FI and exchanges image information corresponding to predetermined G4 control procedures for facsimile communication. A cache 32 temporarily stores image information to be transmitted or to be received. An encoding / decoding unit 33 encodes picture information in a G4 facsimile coding mode and decodes picture information which has been encoded in the G4 facsimile coding mode. An image processing unit 34 performs image processing such as image data enlargement or resolution change. An indicator unit 35 indicates the state of the G4 facsimile communication unit FI. For example, the indicator unit shows 35 that the G4 fax communication unit FI is in a selected state.

An ISDN interface circuit 36 connects the G4 facsimile communication unit FI to the ISDN, and has a layer 1 signal processing function and a function to multiplex / demultiplex one D channel (signal channel) signal and two B channel (information channel) signals , One unity 37 In order to control the transmission on a D channel, signal processing on the D channel of the ISDN performs such as "call set / reset" or call origination procedures 38 and 39 for the control of transmission over the B-channel realize a data transfer function on the B-channel.

An analog interface circuit 40 exchanges modem signals or audio signals with the G3 facsimile communication unit FP or the telephone unit TS. A CODEC 41 performs a conversion between analog signals and digital data to transmit analog signals (audio signals or modem signals) through the ISDN B-channel.

An external interface circuit 42 exchanges necessary information of various kinds with the main control unit MS, the telephone unit TS and the G3 facsimile communication unit FP via the bus line BSc.

A power source control unit 43 performs the power SD1 and / or the power SD2 supplied from the power source unit PS to the respective elements constituting the G4 facsimile communication unit FI, depending on the power consumption mode. The power SD1 is supplied as a power of the low-power consumption mode SD1c, and the power SD2 is supplied as a power of the low-power consumption mode SD2c. The power source control unit 43 exchanges the information concerning the power consumption mode with the main control unit MS, the telephone unit TS and the G3 facsimile communication unit FP via the bus line BSc. The power SD1c of the low-power consumption mode becomes only a reception detection circuit of the unit 37 for controlling a transmission on the D-channel, so that the reception detection circuit of the unit 37 to operate to control a transmission on the D channel in the low power consumption mode. Likewise, the unit sends 37 to control the transmission on the D channel, a signal to detect the reception of the power source control unit 43 display. The power source control unit 43 may operate in either the low-power consumption mode or the normal-power consumption mode, wherein the powers SD1 and SD2 are supplied from the power source unit PS. In the normal power consumption mode, the power source control unit provides 43 both the low-power consumption mode power SD1c and the low-power consumption mode power SD2c to each element of the G4 facsimile communication unit FI. In the low power consumption mode, the power source controller provides 43 only the low power consumption mode power SD1c to appropriate elements of the G4 facsimile communication unit FI.

The G4 fax communication control unit 31 , the cache 32 , the coding / decoding unit 33 , the image processing unit 34 , the indicator unit 35 , the unit 37 to control the transmission on the D-channel, the units 38 and 39 for controlling the transmission on the B-channel, the external interface circuit 42 and the power source control unit 43 all with an internal bus 44 connected. The data exchange among these elements is usually via the internal bus 44 carried out.

5 shows an embodiment of the structure of the telephone unit TS.

In 5 becomes a telephone 51 used for telephone communications, and communication signals le be under the phone 51 , the G3 facsimile communication unit FP, and the G4 facsimile communication unit FI.

One unity 52 for detecting a lift-off detects an off-hook state of the telephone 51 or a state of the phone 51 in which the handset is off-hook or has just been picked up. A detection signal from the unit 52 for detecting a liftoff is output to the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI through the bus line BSp.

A ringing generation circuit 53 generates a ringtone and delivers it to the telephone 51 , A ringing control signal becomes the ringing generation circuit 53 from the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI.

As well be the performance of low power consumption mode SD1 and SD1 the power SD2 of the normal power consumption mode to the telephone unit TS supplied by the power source unit PS.

In the structure described so far, the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI perform a control operation as in FIG 6 to perform the transition from the normal power consumption mode to the low power consumption mode and to execute the inversion from the low power consumption mode to the normal power consumption mode.

In step 101 It is judged whether the power consumption mode is the low-power consumption mode or not. If the result of the assessment in step 101 Is "NO" when the power consumption mode is in the normal power consumption mode, it is judged whether any event occurs or does not occur within a predetermined period of time.

If the assessment in step 102 "NO" is when no event has occurred for the predetermined period of time, the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI remain in the standby state for a predetermined period of time in the step 103 , If the predetermined time period has elapsed, the main control unit MS, the G3 facsimile communication unit FP, and the G4 facsimile communication unit FI go into the low power consumption mode in step 104 above. The control operation then returns to the step 101 back.

In the above case, the power source control unit hears 11 the main control unit MS to supply each element with the power SD1a of the normal power consumption mode. In the above case, the power source control unit is listening 28 G3 fax communication unit FP to provide each element with the power SD1b of the normal power consumption mode. In the above case, the power source control unit is listening 43 G4 fax communication unit FI to supply each element with the power SD1c of the normal power consumption mode. After that, only the power source control unit remains 11 and the operation control unit 7 in the main control section MS, only the power source control unit 28 and the reception detection circuit of the network control device 25 in the G3 facsimile communication unit FP and only the power source control unit 43 and the reception detection circuit of the D-channel transmission control unit 37 in the G4 facsimile communication unit FI in the operating state while all the other elements are in a stopped state.

If an event occurs and the judgment result in step 102 Becomes "YES", the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI execute a process corresponding to the event in step 105 is appropriate. The control operation then returns to the step 105 back.

If the result of the assessment in step 101 during the transition to the low-power consumption mode is "YES", the main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI judge whether a predetermined startup event at the step 106 occurs. If the predetermined event occurs and the judgment result in step 106 Is "YES", the power source control unit starts 11 the main control unit MS, to supply each element with the power SD1a of the normal power consumption mode, the power source control unit 28 The G3 facsimile communication unit FP starts to supply each element with the power consumption mode normal power consumption mode SD1b, and the power source control unit of the G4 facsimile communication unit FI starts to supply each element with the normal power consumption mode power SD1c step 107 , By doing so, the system controller becomes 1 the main control unit MS, the G3 facsimile communication control unit 21 the G3 facsimile communication unit FP and the G4 facsimile communication control unit 31 the G4-Faxkommunikationseinheit FI in the Power ON state switched and started, and they start from an operation for an initial setting or starting from an initial setting operation.

The main control unit MS, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI then execute a process corresponding to the event in step 108 is appropriate. The control operation then returns to the step 101 back.

7 FIG. 12 shows an embodiment of an operation performed when a key operation event occurs because a user depresses the keys of the operation control unit. FIG 7 the main control unit MS actuated. When a key operation by the operation control unit 7 in the low-power consumption mode, the power source control unit recognizes 11 the key operation as a startup event and changes from the low power consumption mode to the normal power consumption mode.

First, the system controller judges 1 Whether the key operation is a call operation or not in step 201 , If the result of the assessment in step 201 Is "NO", if the key operation is not a call operation, the system controller performs 1 a suitable process in the step 202 out, and this operation comes to an end.

If the result of the assessment in step 201 "YES" is, if the key operation is a call operation, in step 203 judges whether the designated communication mode is a G4 fax mode or not.

If the result of the assessment in step 203 is a "YES" command, the power source control unit 11 the power source control unit 43 the G4 facsimile communication unit FI the low-power consumption mode via the bus line BSp in step 204 to delete. The power source control unit 43 The G4 facsimile communication unit FI then clears the low power consumption mode. Accordingly, the G4 facsimile communication unit FI is started and changes to the normal operation state. Here, if the power consumption mode of the G4 facsimile communication unit FI is already the normal power consumption mode, the power source control unit holds 43 maintain the normal power consumption mode.

The system controller 1 then commands the G4 fax communication controller 31 the G4 facsimile communication unit FI, a call operation via the bus line BSc in step 205 to start. The G4 fax communication control unit 31 The G4 facsimile communication unit FI thus begins a predetermined call operation.

The system controller 1 Next, a predetermined G4 fax call process is performed in step 206 and the operation comes to an end. Here, the main control unit MS and the G4 facsimile communication unit FI exchange necessary information such as the ISDN number of the calling destination and the image information data, so that the predetermined G4 facsimile call process can be executed.

If the judgment result of the step 203 "NO" is in step 207 judges whether the designated communication mode is the G3 fax mode or not.

If the result of the assessment in step 207 "YES" commands the power source control unit 11 the power source control unit 28 the G3 facsimile communication unit FP, the low power consumption mode via the bus line BSp in step 208 to delete. The power source control unit 28 The G3 facsimile communication unit FP thus clears the low-power consumption mode, and in response, the G3 facsimile communication unit FP is started and moves toward the normal operation state. Here, if the power consumption mode of the G3 facsimile communication unit FP is already in the normal power consumption mode, the power source control unit falls 28 maintain the normal power consumption mode.

The system controller 1 Next, a call operation start command is sent to the G3 facsimile communication control unit 21 the G3 fax communication unit FP via the bus line BSc in step 209 out. The G3 fax communication control unit 21 The G3 facsimile communication unit FP thus starts a predetermined call operation.

The system controller 1 then performs a predetermined G3 fax call process in step 210 and the operation comes to an end. Here, the main control unit MS and the G3 facsimile communication unit FP exchange necessary information such as the telephone number of the call destination and the image information data, so that the predetermined G3 facsimile call process can be executed.

If the judgment result of the step 207 Is "NO", the designated communication mode is a G3 facsimile mode using the ISDN (hereinafter referred to as "I-G3 mode"), and thus the power source control unit commands 11 the power source control unit 28 the G3 facsimile communication unit FP, the low-level tion consumption mode via the bus line BSp in step 211 to delete. The power source control unit 11 also commands the power source controller 43 the G4 facsimile communication unit FI, the low power consumption mode in step 212 to delete. The power source control unit 28 the G3 facsimile communication unit FP and the power source control unit 43 The G4 facsimile communication unit FI thus clears the low-power consumption mode, respectively. In response, the G3 facsimile communication unit FP and the G4 facsimile communication unit FI are started and change to the normal operation state. Hold the power source control unit here 28 and 43 the normal power consumption mode, if the power consumption mode of the G3 facsimile communication unit FP and the G4 facsimile communication unit FI is already in the normal power consumption mode.

The system controller 1 Next, an instruction for a call operation according to an I-G3 mode is given to the G3 facsimile communication control unit 21 the G3 fax communication unit FP via the bus line BSc in step 213 out. At the same time gives the system control unit 1 the command for the call operation according to the I-G3 mode to the G4-fax communication control unit 31 the G4 fax communication unit FI in step 214 , The G3 fax communication control unit 21 the G3 facsimile communication unit FP and the G4 facsimile communication control unit 31 The G4 facsimile communication unit FI thus starts a predetermined I-G3 mode call operation.

The system controller 1 then performs an I-G3 mode call process in step 215 and the operation comes to an end. Here, the main control unit MS and the G4 facsimile communication unit FI exchange information concerning a "call setting" operation and the like while the main control unit MS and the G3 facsimile communication unit FP exchange information such as image information data the G3 facsimile communication unit FP and the G4 facsimile communication unit FI modem signals.

The 8th to 10 show an embodiment of an operation performed by the main control unit MS when a lift-off is detected, for example, when a user picks up the receiver of the telephone unit TS. When a pick-up is detected in the telephone unit TS, the power source control unit becomes 11 the main control unit MS notified of the detected lift off. If the power consumption mode of the main control unit MS is in the low-power consumption mode at this time, the power source control unit returns 11 from the low power consumption mode to the normal power consumption mode.

First, it is judged whether the line used by the telephone unit TS is registered as a PSTN line or an ISDN line. In particular, in step 301 judges whether or not the registered line is a PSTN. If the result of the assessment in step 301 "NO" is in step 302 judges whether the stored line is an ISDN or not.

If the result of the assessment in step 301 "YES" is because the line used by the telephone unit TS is registered as a PSTN line, or if the result of the judgment in step 302 "NO" is because the line used by the telephone unit TS is not registered at all, commands the power source control unit 11 the line source control unit 28 the G3 facsimile communication unit FP, the low power consumption mode via the bus line BSp in step 303 to delete. The power source control unit 28 The G3 facsimile communication unit FP thus clears the low-power consumption mode, and in response, the G3 facsimile communication unit FP is started and switched to the normal operation state. Here, if the power consumption mode of the G3 facsimile communication unit FP is already the normal power consumption mode at this time, the power source control unit stops 28 maintain the normal power consumption mode.

The system controller 1 then issues a telephone mode call start command to the G3 fax communication control unit 21 the G3 fax communication unit FP via the bus line BSc in step 304 out. The G3 fax communication control unit 21 the G3 facsimile communication unit FP then starts a predetermined telephone mode call operation and the PSTN is connected to the telephone 51 in the telephone unit TS by the network control device 25 connected.

Then, it is judged whether the user has switched the line from the PSTN to the ISDN in step 305 , If the judgment result in step 305 Is "NO" because the line has not been switched, the system controller judges 11 Whether the telephone unit TS has reported a lift off at the end of a communication via the power source control unit 11 has been detected or not, in the step 306 , If the judgment result in step 306 "NO" is judged by the system controller 11 Whether the user has the communication modes in the step 307 has changed or not.

If the judgment result in step 306 "YES" is when the communication has been completed, the system controller notifies 1 the G3 fax communication control unit 21 about the end of the communication over the bus line BSc in step 308 and the operation comes to an end.

If the judgment result in step 307 "YES" is when the user has changed the communication modes, the system controller commands 1 the G3 fax communication control unit 21 the G3 fax communication unit FP, the communication modes via the bus line BSc in step 309 switch. The operation comes to an end. Here, the G3 facsimile communication unit FP switches the line connection from the telephone 51 the telephone unit TS to the G3 fax modem 26 , thereby performing G3 facsimile communication.

If the judgment result of the step 305 "YES" is when the user has switched the line from the PSTN to the ISDN, the line source control unit commands 11 the power source control unit 43 the G4 facsimile communication unit FI, the low-power consumption mode via the bus line BSp in step 310 to delete. The power source control unit 43 The G4 facsimile communication unit FI thus clears the low power consumption mode, and in response, the G4 facsimile communication unit FI starts and changes to the normal operation state. Here, if the power consumption mode of the G4 facsimile communication unit FI is already the normal power consumption mode, the power source control unit stops 43 maintain the normal power consumption mode.

The system controller 1 Next, a telephone mode call start command is sent to the fax communication control unit 31 the G4-Faxkommunikationseinheit FI via the bus BSc in step 311 out. The G4 fax communication control unit 31 The G4 facsimile communication unit FI thus starts a predetermined telephone mode call operation and the CODEC 41 is with the phone 51 the telephone unit TS via the analog interface 40 connected, so that an analog mode telephone communication can be performed.

The system controller 1 judges whether or not the telephone unit TS has been notified that hang-up has been detected at the end of the communication, in step 312 , If the judgment result in step 312 "NO" is judged by the system controller 11 Whether the user is the communication mode in the step 313 has changed or not.

If the judgment result in step 312 Is "YES", since the communication has been completed, notify the system controller 1 the G4 fax communication control unit 31 the end of the communication via the bus BSc in step 314 , The operation comes to an end.

If the judgment result in step 313 "YES" is when the user has changed the communication mode, the system controller commands 1 the G4 fax communication control unit 31 the G4-Faxkommunikationseinheit FI to change the communication mode via the bus BSc in step 315 , The operation comes to an end. Here, the G4 facsimile communication unit FI performs a desired G4 facsimile communication by setting up or using the B channel at this time.

If the result of the assessment in step 303 "YES" is when the lines used by the telephone unit TS are registered as an ISDN line, meanwhile, the power source commands the control unit 11 the power source control unit 43 the G4 facsimile communication unit FI, the low-power consumption mode via the bus line BSp in step 316 to delete. The power source control unit 43 The G4 facsimile communication unit FI thus clears the low power consumption mode. The G4 facsimile communication unit FI is then started and switched to the normal operating state. If the power consumption mode of the G4 facsimile communication unit FI is already the normal power consumption mode, the power source control unit stops 43 maintain the normal power consumption mode.

The system controller 1 Next, a telephone mode call start command is sent to the G4 facsimile communication control unit 31 the G4-Faxkommunikationseinheit FI via the bus BSc in step 317 out. The G4 fax communication control unit 31 The G4 facsimile communication unit FI thus starts a predetermined telephone mode call operation. Here is the CODEC 41 with the phone 51 the telephone unit TS via the analog interface 40 connected, so that an analog mode telephone communication can be performed.

Whether the user has switched the line from ISDN to PSTN will then be in step 318 assessed. If the result of the assessment in step 318 If the user has not changed the line from the ISDN to the PSTN, the system controller judges "NO" 1 whether the telephone unit TS has noticed that a hung-up state or a state in which the handset is hung up, at the end of the communication in step 319 has been detected. If the judgment result of the step 319 "NO" is judged by the system controller 1 whether the user is the communication modes has changed or not, in the step 320 ,

If the judgment result in step 319 "YES" is when the communication has been completed, the system controller notifies 1 the G4 fax communication control unit 31 from the end of communication in step 321 and the operation comes to an end.

If the result of the assessment in step 320 "YES" is when the user has changed the communication modes, the system controller commands 1 the G4 fax communication control unit 31 the G4 facsimile communication unit FI, the communication modes via the bus line BSc in step 322 switch. The operation comes to an end. Here, the G4 facsimile communication unit FI performs a desired G4 facsimile communication by using the B channel set up or used at that time.

If the judgment result in step 318 "YES" is when the user has changed the line from the ISDN to the PSTN, the power source control unit commands 11 the power source control unit 28 the G3 facsimile communication unit FP the low-power consumption mode via the bus line BSp in step 324 to delete. The power source control unit 28 The G3 facsimile communication unit FP thus clears the low power consumption mode, and in response, the G3 facsimile communication unit FP starts and is switched to the normal power consumption mode. Here, if the power consumption mode of the G3 facsimile communication unit FP is already the normal power consumption mode, the power source control unit stops 28 maintain the normal power consumption mode.

The system controller 1 Next, a telephone mode call start command is sent to the G3 facsimile communication control unit 21 the G3 fax communication unit FP via the bus line BSc in step 325 out. The G3 fax communication control unit 21 The G3 facsimile communication unit FP thus starts a predetermined telephone mode call operation and the PSTN is connected to the telephone 51 the telephone unit TS through the network control device 25 connected.

In this situation, the system controller judges 1 Whether the telephone unit TS has reported that an on-hook state has been detected at the end of the communication or not, in step 327 , If the result of the assessment in step 327 "NO" is judged by the system controller 1 whether the user has changed the communication modes or not, in step 328 ,

If the judgment result in step 327 "YES" is when the communication has ended, notifies the system controller 1 the G3 fax communication control unit 21 from the end of the communication via the BSc bus in step 329 and the operation comes to an end.

If the judgment result in step 328 "YES" is because the user has changed the communication modes, the system controller commands 1 the G3 fax communication control unit 21 the G3 fax communication unit FP, the communication modes via the bus line BSc in step 330 switch. The operation comes to an end. Here, the G3 facsimile communication unit FP switches the established line connection from the telephone 51 the telephone unit TS to the G3 fax modem 26 thereby performing a desired G3 facsimile communication.

11 and 12 show operations in a case where reception is detected in the G3 facsimile communication unit FP.

In step 401 judges the circuit for detecting a reception or the reception detection circuit of the network control device 25 Whether a call or a call signal has been detected or not. If the judgment result in step 401 Is "YES", since a ringing signal has been detected, the line in step 402 closed and the power source control unit 28 will be notified of the receipt. If the power consumption mode of the G3 facsimile communication unit FP is the low-power consumption mode, the power source control unit clears 28 the low power consumption mode in step 403 and changes to the normal power consumption mode. If the power consumption mode is already in the normal power consumption mode, the power source control unit stops 28 maintain the normal power consumption mode.

The G3 fax communication control unit 21 judges whether or not a signal CNG, which is a G3 fax procedure signal, has been detected, in step 404 , If the result of the assessment in step 404 "NO" is in step 405 judges whether or not a predetermined period for detecting the signal CNG has elapsed.

If the result of the assessment in step 404 "YES" is when the signal CNG has been detected within the predetermined period of time, the power source control unit commands 28 the power source control unit 11 the main control unit MS, the low-power consumption mode via the bus line BSp in step 406 to delete. The power source control unit 11 the main control unit MS thus clears the low-power consumption mode. Accordingly, the main Control unit MS started and changed into the normal operating state. If the power consumption mode of the main control unit MS is already the normal power consumption mode here, the power source control unit stops 11 maintain the normal power consumption mode.

The G3 fax communication control unit 21 then notifies the system controller 1 of the G3 fax reception via the bus line BSc in step 407 and performs a predetermined G3 fax receiving process in step 408 out. Here, the main control unit MS exchanges information such as image data with the G3 facsimile communication unit FP, so that the predetermined G3 facsimile receiving process can be executed.

After completing the G3 fax reception process, the G3 fax communication control unit will stop 21 the line in the step 409 come back and the operation comes to an end.

If the judgment result in step 405 "YES" is that, since the predetermined time has elapsed without the signal CNG being detected, the network control device connects 25 the PSTN with the phone 51 the telephone unit TS and the power source control unit 28 notifies the ringer generation unit 52 from the reception via the bus line BSp in step 410 , The ring tone generating circuit 53 the telephone unit TS then sends a predetermined ring tone to the telephone 51 so that the bell of the phone 51 rings to notify the user of the call reception. The user then lifts the handset of the phone 51 to make a phone call.

The G3 fax communication control unit 21 then judges whether an off-hook state is from the telephone unit TS via the power source control unit 28 has been reported or not, in step 411 , If the judgment result in step 411 "NO" is judged by the G3 facsimile communication control unit 21 whether the line is through the caller in the step 412 has been interrupted or not.

If the judgment result in step 411 Is "YES", since a lift-off has been reported by the telephone unit TS, the G3 facsimile communication control unit judges 21 whether an applied condition has been detected, via the power source control unit 28 from the telephone unit TS, or not, to the end of the communication in step 413 to monitor. If the judgment result in step 413 "NO" is judged by the G3 facsimile communication control unit 21 whether the line has been interrupted by the caller, in step 414 ,

If the judgment result in step 413 "YES" is when an applied state has been detected, or if the result of the judgment in step 414 If the line has been disconnected, "YES" is set by the G3 fax communication controller 21 the line in the step 415 come back. The operation comes to an end. If also the judgment result in step 412 "YES" is when the user of the receiving end has not responded to the call reception, the G3 facsimile communication control unit moves 21 to the step 415 continue to restore the line. After that, the operation comes to an end.

13 shows an embodiment of operations in a case where reception has been detected in the G4 facsimile communication unit FI.

In step 510 It is judged whether the layer-1 is in a continuous operation state or not. If the judgment result in step 510 Is "YES", it is judged whether or not a "Call Setting Message Setup" has been detected by the ISDN in the step 502 , In particular, a "Call Setting Message Setup" represents a signal to indicate to which data communication terminal or terminal (eg G3-Fax, G4-Fax or telephone) all messages or messages ("Messages") are to be sent or to be sent. With "Call Setting Message Setup" thus represents in particular a specific message ("Message"), which denotes a particular data communication terminal.

If the judgment result in step 502 "YES" is when a "Call Setting Message Setup" has been detected by the ISDN, at step 503 judges whether the type of the designated destination terminal is a G4 fax or not.

If the result of the assessment in step 503 If the type of the designated destination terminal is a G4 facsimile, the power source control unit commands "YES" 43 the power source control unit 11 the main control unit MS, the low-power consumption mode via the bus line BSp in step 504 to delete. The power source control unit 11 deletes the low power consumption mode. Accordingly, the main control unit MS is started and it is switched to the normal operation state. Here, if the power consumption mode of the main control unit MS is already the normal power consumption mode, the power source control unit stops 11 maintain the normal power consumption mode.

The G4 fax communication control unit 31 then notifies the system controller 11 via the G4 fax reception via the BSc bus in step 505 so that a predetermined G4 fax reception process in step 506 is performed. Here, the main control unit MS exchanges information, such as image data, with the G4 facsimile communication unit FI to execute the predetermined G4 facsimile receiving process.

After completing the G4 fax reception process, the G4 fax communication control unit interrupts 31 the communication channel and releases the communication channel, in step 507 and the surgery comes to an end.

If the result of the assessment in step 503 Is "NO", if the type of the designated destination terminal is not a G4 fax, in step 508 judges whether the type of the designated destination terminal is a G3 fax or a telephone. If the judgment result of the step 508 "NO" is, if the type of the designated destination terminal is neither a G3 fax nor a telephone, the reception is ignored and the operation returns to the step 501 back.

If the judgment result in step 508 Is "YES", commands the power source control unit 43 the power source control unit 11 the main control unit MS to clear the low-power consumption mode via the bus line BSp, in step 509 , The power source control unit 11 the main control unit MS thus clears the low-power consumption mode. Accordingly, the main control unit MS is started and switched to the normal operating state. Here, if the power consumption mode of the main control unit MS is already the normal power consumption mode, the power source control unit stops 11 maintain the normal power consumption mode.

The G4 fax communication control unit 31 then notifies the system controller 1 from the G3 fax reception or the telephone reception, via the bus line BSc in step 510 , A predetermined G3 fax receiving process or telephone receiving process is then in step 511 executed.

After the completion of the G3 fax reception process or the telephone reception process, the G4 facsimile communication control unit interrupts 31 the communication channel and the operation comes to an end.

Meanwhile, if the judgment result in step 501 "NO" is when the layer-1 is not in the continuous state, in step 512 judges whether a layer 1 start has been detected by the ISDN or not.

If the result of the assessment in step 512 "YES" is when a layer 1 start has been detected by the ISDN, clears the power source control unit 43 the low power consumption mode in step 513 , eliminating the other elements, such as the G4 fax communication control unit 31 is started. Whether a "Call Setting Message Setup" or "Call Setting Message Setup" is detected or not, in step 514 assessed. If the judgment result in step 514 "YES" is when a "Call Setting Message Setup" has been detected, the operation goes to step 503 over and the steps that follow are executed.

As As far as has been described, the main control unit MS, the control G3 Faxkommunikationseinheit FP and the G4 facsimile communication unit FI transition to the low power consumption mode and from the low power consumption mode, independently. When a communication is running is, there is only the unit, which is the communication process executing, in the normal power consumption mode. Thus, the power saving effect is greater than in the prior art and the operating cost of the apparatus can be effectively reduced.

14 shows a second embodiment of a digital communication terminal of the present invention. In this embodiment, the present invention is also applied to a facsimile machine.

This fax machine comprises a main communication unit MM, a G4 facsimile communication unit FF and a power source unit PSa. The main communication unit MM provides a user interface and runs a Image information processing, telephone communications and G3 fax communications out. The G4 facsimile communication unit FF carries G3 facsimile communication and G4 fax communications out, in which ISDN is used. The power source unit PSa provides low power consumption mode and SD1 performance the power SD2 of the normal power consumption mode to the main communication unit MM and the G4 fax communication unit FF.

At the main communication unit MM, performs a system control unit 61 various processes, such as a control process of each component of the fax machine. A system memory 62 stores data for the system controller 61 necessary to execute a control program and a process program and serves as a workspace for the system controller 61 , A parameter memory 63 stores inherent information of various types of this fax machine, such as an ID number. A clock circuit 64 gives information about the current time.

A scanner 65 reads an original image with a predetermined resolution. A printer or plotter 66 Records images at a predetermined resolution and outputs the images. An operation control unit 67 is used to operate the fax machine and includes operation buttons and displays of various types.

An encoding / decoding unit 68 compresses picture signals into codes and decodes the coded and compressed picture information back to the original picture signals and original picture signals, respectively. An image storage device 69 stores a large amount of encoded and compressed image information.

A network control device 70 is used to connect the main communication unit MM to a PSTN and has an automatic transmission / reception function. A G3 fax modem 61 Used to achieve a G3 fax modem function, it has the function of a low-speed modem, such as a V.21 modem to exchange transmission procedure signals, and has the function of a high-speed modem. such as a V.17 modem, a V.34 modem, a V.29 modem, or a V.27-ter modem, to primarily exchange image information.

An external interface circuit 73 exchanges necessary information of various kinds with the G4 facsimile communication unit FF.

A power source control unit 74 provides the power SD1 of the low power consumption mode or the power SD2 of the normal power consumption mode, depending on the power consumption mode, to the elements of the main communication unit MM. The power source control unit 74 also exchanges information concerning the power consumption mode with a power source control unit 93 the G4 fax communication unit FF. The power SD1 of the low power consumption mode here becomes only the operation control unit 67 supplied, so that the operation control unit 76 can operate in the low power consumption mode. Likewise, the operation control unit sends 67 a signal to indicate a key operation to the power source control unit 74 , A handset or handset 72 sends a signal concerning the detection of the disconnected state to the power source control unit 74 , The power source control unit 74 can operate in either the low-power consumption mode or the normal-power consumption mode because the powers SD1 and SD2 are supplied from the power source unit PSa. In the normal power consumption mode, the power source control unit performs 74 both the low-power consumption mode power SD1 and the normal-power consumption mode power SD2 are added to each element. In the low power consumption mode, the power source control unit performs 74 only the power SD2 of the low power consumption mode to the appropriate elements.

The system controller 61 , the system memory 62 , the parameter memory 63 , the clock circuit 64 , the scanner 65 , the plotter 66 , the operation control unit 67 , the coding / decoding unit 68 , the image storage device 69 , the network control device 70 , the G3 fax modem 71 , the external interface circuit 73 and the power source control unit 74 are with an internal bus 75 connected and the data exchange among these elements is via the internal bus 75 carried out.

In the case of the G4 facsimile communication unit FF, a G4 facsimile communication control unit performs 81 performs an overall operation control for the G4 facsimile communication unit FF and exchanges image information, the exchange being performed in accordance with predetermined G4 facsimile communication control procedures. A cache 62 temporarily stores image information to be transmitted or received. An encoding / decoding unit 83 encodes picture information in a G4 facsimile coding mode and decodes picture information encoded in the G4 facsimile coding mode. An image processing unit 84 performs image processing such as image data enlargement or resolution change. A display unit 85 indicates the state of the G4 facsimile communication unit FF. For example, the indicator unit shows 85 that the G4 fax communication unit FF is in a selected state.

An ISDN interface circuit 86 connects the G4 facsimile communication unit FF to the ISDN, and has a function of processing a Layer 1 signal and has a function of providing a D-channel (signal channel) signal and two B-channel (information channel) signals to multiplex or demultiplex. A D-channel transmission control unit 87 Performs a signal processing with the D channel of the ISDN, such as call settings / resetting procedures or "Call Set / Reset Procedures The units 88 and 89 to control the transmission on a D-channel realize a function of transmitting the data on the B-channel.

An analog interface circuit 90 exchanges modem signals or audio signals with the G3 fax modem 71 the main communication unit MM or the handset or handset 72 out. A CODEC 91 performs analog signal / digital signal conversion to transmit analog signals (audio signals or modem signals) through the B channel of the ISDN. A circuit 92 for an external interface exchanges necessary information of various kinds with the main communication unit MM.

A power source control unit 93 provides the normal power consumption mode power SD2 supplied from the power source unit PSa to the respective elements constituting the G4 facsimile communication unit FF. The power source control unit 93 also exchanges start-up information or boot-up information with the power source control unit 73 of the main communication unit MM. The power source control unit 93 For example, in either the low-power consumption mode or the normal-power consumption mode, it may operate by the powers SD1 and SD2 supplied from the power source unit PSa.

The G4 fax communication control unit 81 , the cache 82 , the coding / decoding unit 83 , the image processing unit 84 , the display unit 85 , the unit 87 to control the transmission on the D-channel, the units 88 and 89 to control the transmission on the B-channel, the circuit 92 for the external interface, the power source control unit 93 all with an internal bus 94 connected. The data exchange among these elements is usually via the internal bus 94 executed.

A unit DTp for detecting a PSTN reception detects reception from the PSTN, and an output detection signal becomes the power source control unit 74 sent to the main communication unit MM. An ISDN reception detecting unit DTi detects reception from the ISDN, and an output detection signal becomes the power source control unit 93 sent to the G4 facsimile communication unit FF.

With this construction, the main communication unit MM and the G4 facsimile communication unit FF become the low-power consumption mode by the power source control units 74 and 93 respectively, after a predetermined period has elapsed in the standby state.

The power source control unit 74 the main communication unit MM deletes the low-power consumption mode and changes to the normal-power consumption mode when the user the operation control unit 67 pressed when the user picks up the phone 72 when a receipt is notified from the unit DTp for detecting a PSTN reception, or when a channel of the low power consumption mode is notified from the power source control unit 93 G4 fax communication unit FF is reported. The main communication unit MM is thus started and performs operations such as user interface operations, telephone communications and transmission / reception operations.

In the low power consumption mode, the elements of the G4 facsimile communication unit are FF except for the power source control unit 74 in a stopped state. If from the power source control unit 74 the main communication unit MM is notified that the low-power consumption mode has been cleared, or when a reception has been detected by the ISDN reception detection unit DTi, the power source control unit clears 74 the low power consumption mode and switches to the normal power consumption mode. The G4 facsimile communication unit FF is thus started and performs G4 facsimile communications, I-G3 communications, telephone communications, and receive operations.

As as far as described, control in this embodiment the main communication unit MM and the G4 facsimile communication unit FF the transfer to and from the low power consumption mode, independently. When a communication is performed, becomes the low power consumption unit only for the designated unit is deleted. Thus, the power saving effect becomes larger than in the prior art and the operating costs of the apparatus can be effectively reduced.

15 FIG. 12 shows an embodiment of an operation performed when a key operation event occurs because a user selects the keys of the operation control unit. FIG 67 the main communication unit MM actuated. When a key operation by the operation control unit 67 is detected in the low-power consumption mode, the power source control unit recognizes 74 , the key operation as a boot event and changes from the low power consumption mode to the normal power consumption mode.

First, the system controller judges 61 Whether the key operation is a call operation or not, in step 601 , If the result of the assessment in step 601 Is "NO", if the key operation is not a call operation, the system controller performs 61 a suitable process in the step 602 and this operation comes to an end.

If the result of the assessment in step 601 "YES" is, if the key operation is a call operation, in step 603 does not judge whether the designated communication mode is a G4 fax mode or not.

If the result of the assessment in step 603 "YES" commands the power source control unit 74 the power source control unit 93 the G4 fax communication unit FF, the low power consumption mode in step 604 to delete. The power source control unit 93 the G4 facsimile communication unit FF thus clears the low power consumption mode. Accordingly, the G4 facsimile communication unit FF is started and switched to the normal operation state. Here, if the power consumption mode of the G4 facsimile communication unit FF is already the normal power consumption mode, the power source control unit stops 93 maintain the normal power consumption mode.

The system controller 61 then commands the G4 fax communication unit 81 the G4 facsimile communication unit FF, a call operation in step 605 to start. The G4 fax communication control unit 81 The G4 facsimile communication unit FF thus starts a predetermined call operation.

The system control 61 Next, a predetermined G4 fax call process is performed in step 606 and the operation comes to an end. Here, the main communication unit MM and the G4 facsimile communication unit FF exchange necessary information such as the ISDN number of the calling destination and the image information data, so that the predetermined G4 facsimile call process can be executed.

If the result of the assessment in step 603 Is "NO", it is judged whether or not the designated communication mode is the G3 facsimile mode in step 607 ,

If the result of the assessment in step 607 "YES" is, leads the power source control unit 61 a predetermined G3 fax call process in step 608 and the operation comes to an end.

If the judgment result in step 607 Is "NO", the designated communication mode is the I-G3 mode and, accordingly, the power source control unit outputs 74 a command to the power source control unit 93 the G4 facsimile communication unit FF to the low power consumption mode in step 609 to delete.

The power source control unit 93 the G4 facsimile communication unit FF thus clears the low power consumption mode. In response, the G4 facsimile communication unit FF starts and changes to the normal operation state. Here, if the power consumption mode of the G4 facsimile communication unit FF is already the normal power consumption mode, the power source control unit stops 93 maintain the normal power consumption mode.

The system controller 61 Next, a command for an I-G3 mode call operation is sent to the G4 facsimile communication control unit 81 the G4 fax communication unit FF in step 610 , The G4 fax communication control unit 81 The G4 facsimile communication unit FF thus starts a predetermined I-G3 mode call operation.

The system controller 61 then performs the predetermined I-G3 mode call process in step 611 through and the operation comes to an end. Here, the main communication unit MM and the G4 facsimile communication unit FF exchange information concerning a call setting operation, and exchange image information data.

The 16 to 18 show an embodiment of an operation performed by the main communication unit MM when an off-hook state is detected when a user picks up the listener 72 has lifted or takes off. When an off-hook state is detected and the power consumption mode of the main communication unit MM is in the low-power consumption mode, the power source control unit returns 74 from the low power consumption mode to the normal power consumption mode.

Whether the line to be used has been registered as a PSTN line or an ISDN line is judged first. Accurate becomes in the step 801 judges whether or not the registered line is a PSTN. If the result of the assessment in step 801 "NO" is in step 802 judges whether the registered line is an ISDN or not.

If the result of the assessment in step 801 "YES" is when the line to be used is a PSTN line, or if the result is the Assessment in the step 802 Is "NO", if the line to be used is not recorded at all, it is judged whether the user has switched the line from the PSTN to the ISDN or has not done so, namely step 803 ,

If the result of the assessment in step 803 Is "NO", if the line has not been changed or has been switched, is in step 805 judges whether a lifted state in the listener 72 has been detected at the end of the communication or if this is not the case. If the result of the assessment in step 805 Is "NO", it is judged whether the user has changed the communication modes or not, in the step 806 ,

If the result of the assessment in step 805 If the communication has been terminated, "YES" is set by the system controller 61 the line in the step 807 come back and the operation comes to an end.

If the result of the assessment in step 806 "YES" is when the user has changed the communication mode, the system controller performs 61 a predetermined G3 fax communication process in step 808 out. After completing the G3 fax communication restores the system control unit 61 the line in the step 807 restore and the operation comes to an end.

If the result of the assessment in step 803 "YES" is when the user has switched the line from the PSTN to the ISDN, gives the power source control unit 74 a command or commands to the power source control unit 93 the G4 facsimile communication unit FF to the low power consumption mode in step 809 to delete. The power source control unit 93 The G4 facsimile communication unit FF thus clears the low power consumption mode, and in response, the G4 facsimile communication unit FF is started and changed over to the normal operation state. Here, if the power consumption mode of the G4 facsimile communication unit FF is already the normal power consumption mode, the power source control unit stops 93 maintain the normal power consumption mode.

The system controller 61 Next, a telephone mode call start command is sent to the G4 facsimile communication control unit 81 the G4 fax communication unit FF in step 810 out. The G4 fax communication control unit 81 The G4 facsimile communication unit FF thus starts a predetermined telephone mode call operation and the CODEC 91 is with the listener 72 via the analog interface 90 connected, so that an analog mode telephone communication can be performed.

The system controller 61 then assesses whether a lift in the handset 72 at the end of the communication has been detected or not, in step 811 , If the result of the assessment in step 811 "NO" is judged by the system controller 61 Whether the user has changed the communication mode or not, in step 812 ,

If the result of the assessment in step 811 "YES" is when the communication has been completed, the system controller notifies 61 the G4 fax communication control unit 81 about the end of the communication in the step 813 , The operation comes to an end.

If the result of the assessment in step 812 "YES" is when the user has switched in the communication mode, gives the system control unit 61 a command or commands to the G4 fax communication control unit 81 the G4 fax communication unit FF to the communication mode in step 814 to switch or to switch. The operation comes to an end. Here, the G4 facsimile communication unit FF performs a desired G4 facsimile communication by using the B channel established at that time.

If in the meantime the result of the judgment in the step 802 "YES" is when the line to be used is recorded as an ISDN line, the power source control unit commands 74 the power source control unit 93 the G4 facsimile communication unit FF, the low power consumption mode in step 815 to delete. The power source control unit 93 The G4 facsimile communication unit FF thus clears the low-power consumption mode. The G4 facsimile communication unit FF is then started and is switched to the normal operation state. Here, if the power consumption mode of the G4 facsimile communication unit FF is already in the normal power consumption mode, the power source control unit stops 93 maintain the normal power consumption mode.

The system controller 61 Next, a telephone mode call start command is sent to the G4 facsimile communication control unit 81 the G4 fax communication unit FF in step 816 out. The G4 fax communication control unit 81 The G4 facsimile communication unit FF thus starts a predetermined telephone mode call operation. Here is the CODEC 91 with the handset 72 via an analog interface 90 connected, so that an analog mode telephone communication can be performed.

Whether the user has switched the line from the ISDN to the PSTN will then be in step 817 assessed. If the result of the assessment in step 817 Is "NO" because the user has not switched the line from the ISDN to the PSTN, the system controller judges 61 whether an on-hook state or an on-hook in the handset 72 at the end of communication in step 818 has been detected. If the result of the assessment in step 818 "NO" is judged by the system controller 61 Whether the user has changed the communication mode or not, in step 819 ,

If the result of the assessment in step 818 "YES" is when the communication has been completed, the system controller notifies 61 the G4 fax communication control unit 81 about the end of the communication in the step 820 and the operation comes to an end.

If the result of the assessment in step 819 Is "YES", if the user has switched in the communication mode, the system control unit commands 61 the G4 fax communication control unit 81 the G4 fax communication unit FF, the communication mode in step 821 to switch or to switch. The operation comes to an end. Here, the G4 facsimile communication unit FF performs a desired G4 facsimile communication by using the B channel set up or used at that time.

If the judgment result in step 817 "YES" is when the user has switched the line from the ISDN to the PSTN, the system controller closes 61 the line, so the communication in step 822 to enable.

In this situation, the system controller judges 61 whether an on-hook or an on-hook state in the handset 72 has been detected, at the end of the communication, or has not been detected, in step 823 , If the result in step 823 "NO" is judged by the system controller 61 Whether the user has switched the communication mode or not, in step 824 ,

If the result of the assessment in step 823 "YES" is when the communication has ended, the control unit turns off 61 the line in the step 826 restore and the operation comes to an end.

If the result of the assessment in step 824 "YES" is when the user has switched the communication mode, the system controller performs 61 a predetermined G3 fax communication process. After completing the G3 fax communication, the system control unit restores 61 the line in the step 826 restore and the operation comes to an end.

19 and 20 show an embodiment of an operation in a case where the PSTN reception detection unit DTp detects a reception, the main communication unit MM is started, and a G3 facsimile reception process is carried out.

When the PSTN reception detection unit DTp detects a reception and the power source control unit 74 of the reception clears the power source control unit 74 the low-power consumption mode and switches to the normal power consumption mode, which starts the elements that the system control unit 61 contain.

In step 901 judges the system controller 61 Whether a ringing has been detected or not. If the result of the assessment in step 901 "YES" is when a ringing has been detected, the system control unit closes 61 the line in the step 902 ,

The system controller 61 then judges whether or not a signal CNG, which is a G3 fax procedure signal or a signal of the G3 facsimile procedure, has been detected, in step 904 , If the result of the assessment in step 904 "NO" is judged by the system controller 61 whether or not a predetermined period for detecting the signal CNG has elapsed, in step 905 ,

If the result of the assessment in step 904 "YES" is when the signal CNG has been detected within the predetermined period of time, the system controller performs 61 a predetermined G3 fax receiving process in step 906 out. After completing the G3 fax reception process, the system control unit will turn off 61 the line in the step 907 come back and the operation comes to an end.

If the judgment result in step 905 "YES" is when the predetermined time has elapsed without the signal CNG being detected, a ringing tone becomes the listener 72 spent to start the user in step 908 to call.

The system controller 61 then judges whether a liftoff from the listener 72 has been reported or not, in the step 909 , If the result of the assessment in step 909 "NO" is judged by the system controller 61 whether the line has been interrupted by the caller or not, and while in step 910 ,

If the result of the assessment in step 909 "YES" is when a lift off the handset 72 has been reported, the system controller stops 61 the task of the ringer to the listener 72 in step 911 , The system controller 61 then judges if a hang up from the listener 72 has been detected or not, namely the end of the communication in the step 912 to monitor. If the judgment result in step 912 "NO" is judged by the system controller 61 whether the line is through the caller in the step 913 has been interrupted.

If the result of the assessment in step 912 "YES" is when a hang-up has been detected, or if the result of the judgment in step 913 a "YES" is when the line has been disconnected, turn off the system controller 61 the line in the step 914 come back. The operation comes to an end.

If also the result of the judgment in step 910 "YES" is, if the user has not responded to the call reception at the receiving end, the output of the ringer tone or tone tone becomes the listener 72 in step 915 stopped. The system controller 61 then put the line in step 914 restore and the operation comes to an end.

21 FIG. 12 shows an embodiment of an operation in a case where the ISDN reception detecting unit DTi detects reception from the ISDN, and the G4 facsimile communication unit FF performs a G4 facsimile receiving process.

In step 1001 For example, the ISDN reception detecting unit DTi judges whether or not the layer-1 is in a continuous operating state. If the result of the assessment in step 1001 Is "YES", the ISDN reception detecting unit DTi judges whether or not a "Call Setting Message Setup" has been detected by the ISDN at the step 1002 ,

If the result of the assessment in step 1002 "YES" is when a "Call Setting Message Setup" or "Call Setup (Message Establishment) Message Setup" from the ISDN in step 1002 has been detected or not.

If the result of the assessment in step 1002 "YES" is when a "Call Setting Message Setup" has been detected by the ISDN, the ISDN reception detecting unit DTi notifies the power source control unit 93 from the reception. The power source control unit 93 thus clears the low power consumption mode, causing the elements including the G4 fax communication control unit 81 to be started. Here are the contents of the "Call Setting Message Setup" to the G4 fax communication control unit 81 via the power source control unit 93 Posted. The G4 fax communication control unit 81 then judges whether or not the type of the terminal designated by the "Call Setting Message Setup" is a G4 fax, in step 1003 ,

If the result of the assessment in step 1003 If the type of the designated destination terminal is a G4 facsimile, the power source control unit indicates "YES" 93 a command or commands to the power source control unit 74 the main communication unit MM to the low-power consumption mode in step 1004 to delete. The power source control unit 74 deletes the low power consumption mode. Accordingly, the main communication unit MM is started and switched to the normal operation state. If the power consumption mode of the main communication unit MM is already here. is in the normal power consumption mode, stops the power source control unit 74 maintain the normal power consumption mode.

The G4 fax communication control unit 81 then inform the system controller 61 G4 fax reception in step 1005 so that a predetermined G4 fax reception process in step 1006 is performed. Here, the main communication unit MM exchanges information, such as image data, with the G4 facsimile communication unit FF to execute the predetermined F4 facsimile receiving process.

After completing the G4 fax reception process, the G4 fax communication control unit interrupts 81 and gives the communication channel in the step 1007 free and the operation comes to an end.

If the judgment result in step 1003 "NO" is when the type of the terminal designated by the "Call Setting Message Setup" is not a G4 fax is changed in step 1008 judges whether the type of the designated terminal is a G3 fax or a telephone. If the result of the assessment in step 1008 "NO" is, if the type of the designated terminal is neither a G3 fax nor a telephone, the reception is ignored If the result of the judgment in step 1008 "YES" commands the power source control unit 93 the power source control unit 73 the main communication unit MM, the low power consumption mode in step 1009 to delete. The power source control unit 74 the main communication unit MM thus clears the low power consumption mode. Accordingly, the main communication unit MM is started and switched to the normal operation state. Here, if the power consumption mode of the main communication unit MM is already in the normal power consumption mode, the power source control unit stops 74 maintain the normal power consumption mode.

The G4 fax communication control unit 81 then notifies the system controller 61 via the G3 fax reception or the telephone reception in step 1010 , A predetermined G3 fax or telephone reception process will then be in step 1011 executed.

After the completion of the G3 fax reception process or the telephone reception process, the G4 facsimile communication control unit interrupts 81 the communication channel and the operation comes to an end.

If in the meantime the evaluation result in the step 501 "NO" is when the layer-1 is not in the on-going operation state, the ISDN reception-detecting unit DTi judges whether or not a layer 1 start is detected by the ISDN, in step 1012 ,

If the result of the assessment in step 1012 Is "YES", if a layer 1 start has been detected by the ISDN, it is judged whether in step 1014 a "Call Setting Message Setup" has been detected or not If the result of the judgment in step 1014 "YES" is when a "Call Setting Message Setup" has been detected, the unit DTi commands to detect an ISDN reception, the power source control unit 93 to clear the low power consumption mode. The G4 facsimile communication unit FF then executes the processes that follow.

One Data communication terminal includes a system control unit that collectively performs operations of the Data communication terminal controls and includes one or more data communication controllers. The system controller and the data communication controllers are each provided with power-saving control units. each the line-saving control units change independently of a normal-power consumption mode to a low power consumption mode and clear the low power consumption mode and returns to the normal power consumption mode back, when an event occurs. Each of the power saving control units commands as well as the power saving control unit of the system control unit or at least one of the data communication control units, the low-power consumption mode Clear, depending on the type of each event, each corresponding object, that is controlled happened.

1

MS

Main control unit

TS

telephone unit

FP

G3 Faxkommunikationseinheit

FI

G4 Faxkommunikationseinheit

PS

Power source unit

2

1

System control unit

2

system memory

3

parameter memory

4

clock circuit

5

scanner

6

printer

7

Operation control unit

8th

Encoding / decoding unit

9

Image storage device

10

external interface

11

Power source control unit

3

21

G3 facsimile communication control unit

22

buffer memory

23

Encoding / decoding unit

24

indicator unit

25

Network control device

26

G3 fax modem

27

external interface

28

Power source control unit

4

31

G4 facsimile communication control unit

32

buffer memory

33

Encoding / decoding unit

34

Image processing unit

35

indicator unit

36

ISDN interface

37

D-channel transmission control unit

38

B channel transmission control unit

39

B channel transmission control unit

40

Analog interface

41

CODEC

42

external interface

43

Power source control unit

5

51

phone

52

detection unit for aft Status

53

Ringtone generating unit

6

101

Low power consumption mode ?

102

event occurred?

103

predetermined Time expired?

104

Switch to the low power consumption mode

105

Running the Process that for the event is appropriate

106

is an event occurred?

107

Delete the Low power consumption mode

108

Running the Process that for the event is appropriate

7

201

Call ?

202

Running a suitable process

203

G4 fax mode ?

204

Delete the Low power consumption mode of G4 fax communication

unit

205

Command the G4 fax communication unit to start calling

206

Running the G4 fax Rufprozesses

207

G3 fax mode ?

208

Delete the Low power consumption mode of G3 fax communication

unit

209

Command the G3 fax communication unit to start calling

210

Running a G3 Faxrufprozesses

211

Delete the Low power consumption mode of G3 fax communication

unit

212

Delete the Low power consumption mode of G4 fax communication

unit

213

Command the G3 facsimile communication unit, calling in the I-G3 mode

kick off

214

Command G4 fax communication unit, calling in I-G3 mode

kick off

215

Running a I-G3 mode Rufprozesses

8th

301

when PSTN registered or recorded?

302

when ISDN registered?

303

Delete the Low power consumption mode of G3 fax communication

unit

304

Command to start calling the G3 facsimile communication unit

305

management changed?

306

communication completed ?

307

communication changed?

308

notify the G3 fax communication unit via the end of the commu

munication

309

notify the G3 fax communication unit via switching the

communication

9

310

Delete the Low power consumption mode of G4 fax communication

unit

311

Command the G4 fax communication unit, with the calls in the phone

mode to start

312

communication completed ?

313

communication changed?

314

notify the G4 fax communication unit via the end of the commu

munication

315

notify the G4 fax communication unit via changing the

communication

10

316

Delete the Low power consumption mode of G4 fax communication

unit

317

Command the G4 fax communication unit, with the calls in the phone

mode to start

318

management changed?

319

communication completed?

320

communication changed or switched?

321

notify the G4 fax communication unit via the end of the commu

munication

322

notify the G4 fax communication unit via changing or

Switch the communication

324

Delete the Low power consumption mode of G3 fax communication

unit

325

Command the G3 fax communication unit, with the calls in the telephone mode

to kick off

327

communication completed ?

328

communication switched?

329

notify the G3 fax communication unit via the end of the commu

munication

330

notify the G3 fax communication unit via changing or

Switch the communication

11

401

Call detected

402

Close the management

403

Delete the Low power consumption mode

404

CNG detected?

405

predetermined Time expired?

406

Delete the Low power consumption mode of the main control unit

407

notify the main control unit over the G3 fax

408

Running a G3 Faxempfangsprozesses

409

Restore the line

12

410

notify the telephone unit over the call reception

411

Take off detected?

412

interruption detected?

413

hang up detected?

414

interruption detected?

415

Restore the line

13

501

is Layer 1 in continuous mode?

502

connection or setup detected?

503

G4 fax detected?

504

Delete the Low power consumption mode of the main control unit

505

notify the main control unit over the G4 fax

506

Running a Faxempfangsprozesses G4

507

interrupt and releasing the lead

508

G3 / TEL call reception detected?

509

Delete the Low power consumption mode of the main control unit

510

notify the main control unit over the G3 / TEL call reception

511

Running the G3 / TEL Rufempfangsprozesses

512

Layer 1 booting detected?

513

Delete the Low power consumption mode

514

Set up or structure detected?

14

61

System control unit

62

system memory

63

parameter memory

64

clock circuit

65

scanner

66

plotter

67

Operation control unit

68

Encoding / decoding unit

69

Image storage device

70

Network control device

71

G3 fax modem

72

receiver

73

external interface

74

Power source control unit

81

G4 facsimile communication control unit

84

Image processing unit

85

indicator unit

86

ISDN interface

87

D-channel transmission control unit

88

B channel transmission control unit

89

B channel transmission control unit

90

analog interface

91

CODEC

92

buffer memory

93

Power source control unit

PSA

Power source control unit

DTp

PSTN-reception detection unit

DTi

ISDN reception detection unit

15

601

Call ?

602

Running a suitable process

603

G4 fax mode ?

604

Delete the Low power consumption mode of G4 fax communication

unit

605

Command the G4 fax communication unit to start the call

606

Running a G4 Faxrufprozesses

607

G3 fax mode ?

608

Running a G3 Faxrufprozesses

609

Delete the Low power consumption mode of G4 fax communication

unit

610

Command G4 fax communication unit, calling in I-G3 mode

start

611

Running a I-G3 Rufprozesses

16

801

when PSTN registered?

802

when ISDN registered?

803

power changed or switched?

804

Close the management

805

communication completed ?

806

communication changed?

807

Restore the line

808

Running a G3 fax communication

809

Delete the Low power consumption mode of G4 fax communication

unit

810

Command the G4 fax communication unit, with the calls in the phone

mode to start

811

communication completed?

812

communication switched or changed?

813

notify the G4 fax communication unit via the end of the commu

munication

814

notify the G4 fax communication unit via switching or

Switch the communication

18

815

Delete the Low power consumption mode of G4 fax communication

unit

816

Command the G4 fax communication unit calling in the telephone

mode to start

817

management switched?

818

communication switched?

819

communication switched?

820

notify the G4 fax communication unit via the end of the commu

munication

821

notify the G4 fax communication unit via switching the communication

822

Close the management

823

communication completed ?

824

communication switched?

826

Restore the line

19

901

Call detected?

902

Close the management

904

CNG detected?

905

predetermined Time expired?

906

Running the G3 Faxempfangsprozesses

907

Restore the line

20

908

Output the ringing tone to the listener

909

Take off detected?

910

interrupt detected?

911

To stop the ringing tone

912

Listener hung up detected?

913

interruption detected?

914

Restore the line

915

To stop the ringing tone

21

1001

is the layer-1 in a continuous operating state?

1002

Set up or structure detected?

1003

G4-receiving detected?

1004

Delete the Low power consumption mode of the main control unit

1005

notify the main control unit over the G4 fax reception

1006

Running a Faxempfangsprozesses G4

1007

interrupt and releasing the lead

1008

G3 / TEL-receiving detected?

1009

Delete the Low power consumption mode of the main control unit

1010

notify the main control unit over the G3 / TEL reception

1011

Running a G3 / TEL-receiving process

1012

Layer 1 Start detected?

1014

Set up or structure detected?

Claims (22)

A data communication terminal comprising: a main control unit (MS) that controls operations of the data communication terminal; more than one data communication control unit (FP, FI, TS) operating independently and each associated with a terminal communication mode (telephone, G3-Fax, G4-Fax); and a power source unit (PS) which supplies a first power (SD1) in the low power consumption mode and a second power (SD2) in the normal power consumption mode to the main control unit (MS) and respectively to the data communication control units (FP, FI, TS) ; wherein the main control unit (MS) and the data communication control units (FP, FI, TS) are each provided with power saving control units ( 11 . 28 . 43 respectively independently controlling the transition between a normal power consumption mode and a low consumption mode of the main control unit (MS) and the data communication control units (FP, FI, TS) by means of the first (SD1) and second (SD2) power, each obtained from the power source unit (PS); and wherein, when a call operation is performed, the power saving control unit ( 11 ) of the main control unit (MS) changes from the low power consumption mode of the main control unit (MS) to the normal power consumption mode of the main control unit (MS), and that of the power saving control unit (MS) 28 . 43 ) of the data communication control units (FP, FI, TS) corresponding to the terminal communication mode (telephone, G3 facsimile, G4 facsimile) designated by the call operation commands to cancel the low power consumption mode. A data communication terminal as claimed in claim 1, in which: the data communication control units an ISDN data communication control unit containing an ISDN as a transmission path; and the power-saving control unit of the ISDN data communication control unit establishes an ISDN Layer 1 control unit in a release state, to detect a receipt when the ISDN data communication control unit is up in the low power consumption mode, the low power consumption mode the ISDN data communication control unit clears, if the ISDN Layer 1 control unit detects a reception, and the Power Control Unit of the Main Control Unit (MS) commands to clear the low-power consumption mode when the ISDN data communication control unit a reception in it in accordance confirmed with an ISDN Layer 3 procedure signal. A data communication terminal as claimed in claim 1, in which: the data communication control units a PSTN data communication control unit comprising a network control unit, wherein the PSTN data communication control unit a PSTN as a transmission path used; and the power saving control unit of the PSTN data communication control unit sets the network controller in a release state to detect a reception when the PSTN data communication control unit yourself in the low power consumption mode located, the low power consumption mode of the PSTN data communication control unit extinguished when the network control unit detects a reception and the power saving control unit the main control unit (MS) commands the low power consumption mode to delete, when the PSTN data communication controller receives a reception therein approved. A data communication terminal as claimed in claim 1, in which: the data communication control units an ISDN data communication control unit, an ISDN as a transmission path used, and a PSTN data communication unit, which is a network control unit , wherein the PSTN data communication unit is a PSTN as a transmission path used; the power-saving control unit of the ISDN data communication control unit an ISDN Layer 1 control unit in a release state for detecting of a reception when in the low power consumption mode whose low-power consumption mode is cleared when the ISDN Layer 1 control unit detects a reception, and the Power Control Unit of the Main Control Unit (MS) commands to clear the low-power consumption mode when the ISDN data communication control unit has a Reception in accordance with an ISDN Layer 3 procedure signal approved; and the Power saving control unit of the PSTN data communication control unit sets the network controller in a release state detect a receipt when in the low power consumption mode is their low-power consumption mode extinguished when the network control unit detects a reception and the Power Control Unit of the Main Control Unit (MS) commands the low power consumption mode to delete, when the PSTN data communication controller detects a receipt therein. A data communication terminal as claimed in claim 1, which includes: a telephone control unit for telephone communications, in which: if one of the data communication controllers has a Reception detected, clears the power saving control unit of the data communication control unit their low power consumption mode; and if the data communication control unit recognizes a telephone call reception, a telephone communication, the telephone control unit uses executed. A data communication terminal as claimed in claim 1, which includes: a plurality of data communication control units; and a telephone control unit for telephone communications, wherein: the Telephone control unit has a registration unit, the type one of the data communication control units registers or stores, the one for one To use telephone communication is; the telephone control unit the power saving control unit of the data communication control unit commands whose type is registered or stored in the registration unit is to clear the low power consumption mode when a telephone call operation, the registered data storage control unit used, performed becomes; and if the type of line being used is re-named the telephone control unit commands the power saving control unit the data communication control unit, the newly designated Line corresponds to clear the low power consumption mode, where thereby a communication is performed by the data communication control unit is used, which corresponds to the newly designated line. A data communication terminal as claimed in claim 6, in which the data communication control unit, their power saving control unit through the power-saving control unit of the telephone control unit commanded to clear the low power consumption mode, an indicator unit indicating that the data communication control unit in use. Data communication terminal as in claim 6 or 7 claimed in which: the power-saving control unit of Telephone control unit of the power control unit of the main control unit (MS) commands to clear the low power consumption mode when a communication change command during a communication operation is output, which uses the telephone control unit; and the Data communication control unit after the communication change works, the main control unit (MS) commands a communication operation to start. A method of controlling a data communication terminal, comprising: a main control unit (MS) that controls operations of the data communication terminal; more than one data communication control unit (FP, FI, TS) operating independently and each associated with a terminal communication mode (telephone, G3-Fax, G4-Fax); and a power source unit (PS) which supplies a first power (SD1) in the low power consumption mode and a second power (SD2) in the normal power consumption mode to the main control unit (MS) and respectively to the data communication control units (FP, FI, TS) ; wherein the main control unit (MS) and the data communication control units (FP, FI, TS) are each provided with power saving control units ( 11 . 28 . 43 Each of the power saving control units independently controls the transition between a normal power consumption mode and a low consumption mode of the main control unit (MS) and the data communication control units (FP, FI, TS) by means of the first (SD1) and second (SD2) power respectively obtained from the power source unit (PS); and the power-saving control unit ( 11 ) of the main control unit (MS) changes from the low power consumption mode of the main control unit (MS) to the normal power consumption mode of the main control unit (MS) when a call operation is to be performed, the power saving control unit ( 11 ) of the main control unit (MS) of that power-saving control unit ( 28 . 43 ) of the data communication control units (FP, FI, TS) corresponding to the terminal communication mode (telephone, G3 facsimile, G4 facsimile) designated by the call operation commands to cancel the low power consumption mode. A method as claimed in claim 9, wherein the data communication control units an ISDN data communication control unit containing an ISDN used as a transmission path, in which the method further comprises the following steps: an ISDN Layer 1 control unit is set in a release state for detecting a reception, when the ISDN data communication control unit is in the low-power consumption mode is; the low power consumption mode is cleared when the ISDN Layer 1 control unit detects a reception; and the main control unit (MS) becomes commanded to clear the low power consumption mode when the ISDN data communication control unit accordingly receives a reception therein confirmed an ISDN Layer 3 procedure signal. A method as claimed in claim 9, wherein the data communication control units a PSTN data communication control unit containing a Network control unit and a PSTN as a transmission path used the method further comprising the steps of: the Network control unit is set in a release state, to detect a reception when the PSTN data communication control unit is in the low power consumption mode; of the Low power consumption mode is cleared when the network control unit has one Reception detected; and the main control unit (MS) is commanded to clear the low-power consumption mode when the PSTN data communication control unit a receipt confirmed in it. A method as claimed in claim 9, wherein the data communication control units include an ISDN data communication control unit using an ISDN as a transmission path and a PSTN data communication control unit using a PSTN as a transmission path and a network control unit, the method further comprising the steps of: an ISDN Layer 1 control unit being set in a release state for detecting reception when the ISDN data communication ons control unit is in the low power consumption mode; the low power consumption mode is cleared when the ISDN Layer 1 control unit detects a receipt; the main control unit (MS) is commanded to clear the low power consumption mode when the ISDN data communication control unit confirms reception therein according to an ISDN Layer 3 procedure signal; the network control unit is set in a release state to detect reception when the PSTN data communication control unit is in the low-power consumption mode; the low power consumption mode is cleared when the network control unit detects a receipt; and the main control unit (MS) is commanded to clear the low power consumption mode when the PSTN data communication control unit confirms receipt therein. A method as claimed in claim 9 wherein the method comprises the following steps: the low power consumption mode from one of the data communication controllers detecting a reception has, is deleted; and a communication operation is performed, wherein the telephone control unit is used when the data communication control unit recognizes the reception as a telephone reception. A method as claimed in claim 9 wherein the data communication terminal a telephone control unit for telephone communications includes, the method comprising the following steps: of the Type of data communication control unit used for a telephone communication is to be used is registered in the telephone control unit or recorded; the data communication control unit, whose type is registered or stored is commanded the low power consumption mode to delete, if a telephone call operation that includes the registered or stored Data communication control unit used is performed; and if the type of line being used is re-named is the data communication control unit, the newly designated Line corresponds, commanded, the low power consumption mode to delete, thereby performing a communication, wherein the data communication control unit is used, which corresponds to the newly designated line. A method as claimed in claim 9, which further the step of displaying comprises the data communication control unit, commanded by the telephone control unit, the low power consumption mode to delete, in use. A method as claimed in claim 9, which further the following steps include: the main control unit (MS) is through the power saving control unit of the telephone control unit commanded to clear the low power consumption mode when a communication change command during a communication operation is output, which uses the telephone control unit; and of the Main Control Unit (MS) is controlled by the data communication control unit commanded, a communication operation after the communication change to start. A data communication terminal as claimed in claim 1, in which the main control unit (MS) performs a data communication, the uses a first communication line; and the data communication control unit uses a second communication line, wherein: when a Calling operation performed will, delete the power saving control unit of the main control unit (MS) whose Low power consumption mode; if a communication mode, which is designated by the call operation, the first communication line The power-saving control unit commands the main control unit (MS) not the power saving control unit of the data communication control unit To clear low power consumption mode; and if the designated Communication mode involves the second communication line, the power-saving control unit commands the main control unit (MS) of the power saving control unit of the data communication control unit, the low power consumption mode to delete. A data communication terminal as claimed in claim 17, wherein the first communication line is a PSTN line and the second communication line is an ISDN line. A data communication terminal as claimed in claim 17, in which the first communication line is an ISDN line and the second communication line is a PSTN line. A method as claimed in claim 9, for controlling a data communication terminal, wherein: the main control unit (MS) controls operations of the data communication terminal and performs data communication by using a first communication line; and the data communication control unit, a data communication by using a second communication line; the method comprising the steps of: the low power consumption mode of the main control unit (MS) being cleared when a call operation is performed; and the power saving control unit of the data communication control unit is commanded to cancel the low power consumption mode when a communication mode designated by the calling operation includes the second communication line, but the power saving control unit of the data communication control unit is not commanded to clear the low-power consumption mode when the designated communication mode involves the first communication line. A method as claimed in claim 20, wherein the first communication line is a PSTN line and the second Communication line is an ISDN line. A method as claimed in claim 20, wherein the first communication line is an ISDN line and the second Communication line is a PSTN line.