JPH11146178A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide facsimile equipment in which the configuration of a G3 facsimile equipment main body is not so much changed even with a G4 system communication function added to the existing G3 facsimile equipment. SOLUTION: In the facsimile equipment where a G4 facsimile adaptor 10 having a G4 system communication function connects to an existing G3 facsimile equipment main body 1, when a transfer capability at reception is of a digital signal, communication processing of the G4 system is conducted, and when the transfer capability is of a 3.1 kHz audio or voice, the signal is received according to the standby mode of the G3 facsimile equipment main body 1. That is, either the G3 system facsimile communication or a telephone communication is selected by the standby mode of the G3 facsimile equipment main body 1, and when the standby mode is of the facsimile mode, the facsimile reception by the G3 system is conducted, and when the standby mode is of the facsimile/telephone mode, the G3 system facsimile reception is conducted if hook-off for a telephone set is not detected within a prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ITU (International Telecommunication Union) -T Group 3 (hereinafter referred to as G3) and ITU-T Recommendation T.4 based on ITU-T Recommendation T.4. The present invention relates to a facsimile apparatus capable of performing communication in a group 4 (hereinafter, referred to as G4) system compliant with G.6.

[0002]

2. Description of the Related Art At present facsimile communication, there are a G3 system using an analog line and a G4 system using a digital line.
There is a method. In the G3 system, digital facsimile data is converted into an analog voice signal by a modem, and the data is transmitted and received via a general PSTN (Public Switched Telephone Network). On the other hand, in the G4 system, digital data lines, more specifically, ISDN
(Integrated Services Digital Network) to transmit and receive data in digital form.

[0003] At present, general facsimile communication is based on the G3 system.
Facsimile communication by the method is spreading. In order to perform facsimile communication in the G4 system, it is basically necessary to purchase and use a dedicated facsimile device (generally, facsimile communication in the G3 system is also possible). An adapter that performs the function of the G4 system is attached to the G3 facsimile
Facsimile communication in four systems is also widely performed.

In the G4 facsimile apparatus, whether the incoming call is a facsimile communication of the G4 system, a facsimile communication of the G3 system, or a telephone is determined by a transmission capability (bearer capability: BC) and a higher layer consistency (HL).
C). On the other hand, the G3 facsimile apparatus selects facsimile communication or telephone depending on a standby mode (facsimile mode, telephone / facsimile mode, telephone mode).

[0005]

In the case of a device in which a G4 communication function is added to an existing G3 facsimile device main body, if the G4 side determines whether the communication is a facsimile communication using the G3 method or a telephone, the G4 facsimile communication is not performed. In addition, there is a problem that the configuration of the main body of the G3 facsimile apparatus must be largely changed.

The present invention has been made in view of the above circumstances, and the G3 facsimile apparatus main body is provided with a G3 facsimile apparatus main body by allowing a G3 facsimile apparatus main body to leave the discrimination between facsimile communication and telephone in the standby mode of the G3 facsimile apparatus main body. It is an object of the present invention to provide a facsimile apparatus which does not need to change the configuration of the main body of the G3 facsimile apparatus when the communication function is added as an option.

[0007]

SUMMARY OF THE INVENTION A facsimile apparatus according to the present invention has a G3 facsimile apparatus with a G4 communication function added to a G3 facsimile apparatus body. Determining means for determining whether or not the communication is of the F4 type, and processing means for performing processing in accordance with a standby mode of the facsimile apparatus main body when the determining means determines that the communication is not of the G4 type. Features.

In another facsimile apparatus according to the present invention, when the facsimile apparatus determines that the communication is not the G4 communication in the above-described configuration and the standby mode of the facsimile apparatus body is the facsimile mode, The means is configured to perform G3 facsimile reception.

Still another facsimile apparatus according to the present invention, in the above-described configuration, further comprises means for detecting an off-hook of a telephone of the facsimile apparatus main body, wherein the judging means judges that the communication is not G4 communication, and When the standby mode of the facsimile apparatus is the telephone / facsimile mode, the processing means is configured to perform G3 facsimile reception when the off-hook of the telephone is not detected within a predetermined time.

In the facsimile apparatus of the present invention, when the transmission capability transmitted from the outside at the time of reception is digital, communication processing of the G4 system is performed, and the transmission capability is 3.1 kHz.
If it is audio or voice, it is received according to the standby mode of the main body of the G3 facsimile apparatus. That is, G3
Facsimile communication or telephone is selected according to the standby mode of the main body of the G3 facsimile apparatus. When the standby mode is the facsimile mode, facsimile reception of the G3 system is performed, and when the standby mode is the telephone / facsimile mode. If the off-hook of the telephone is not detected within a predetermined time, G3 facsimile reception is performed. Therefore, selection between facsimile communication in the G3 system and telephone is performed in accordance with the standby mode of the main body of the G3 facsimile apparatus.
The function of the main body of the G3 facsimile machine can be utilized as it is.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments.

FIG. 1 is a block diagram of a facsimile apparatus according to the present invention. In FIG. 1, reference numeral 1 denotes a G3 facsimile apparatus main body, 2 denotes an ISDN line as a digital data line, and in the facsimile apparatus of the present invention, a G4 facsimile adapter 10 that performs a G4 communication function is connected to the G3 facsimile apparatus main body 1. Make up the configuration.

Data bus of G3 facsimile machine body 1
19 and the data bus 25 of the G4 facsimile adapter 10
It is connected via a dual port RAM (DP-RAM) 24. The DP-RAM 24 buffers the digital data transmitted and received between the G3 facsimile apparatus main body 1 and the G4 facsimile adapter 10. The off-hook information and telephone number information of the telephone of the G3 facsimile apparatus main body 1 are sent from the G3 facsimile apparatus main body 1 to the G4 facsimile adapter 10 via the DP-RAM 24.

The G4 facsimile adapter 10 is an ISDN
An ISDN interface unit 11 for performing an interface function with the line 2, an audio signal codec unit 12 for mutually converting an analog audio signal and digital data, and a line control unit
14, G4 facsimile function unit 20, and C for controlling the whole
PU13.

The ISDN interface unit 11 has an S-interf
It is composed of an ace function and a LAP-D function. S-in
The terface means an interface at point S, and includes a protocol processing function, a maintenance function, and an interface function. The LAP-D function controls the protocol for the ISDN D channel.

The line control unit 14 includes a line current supply circuit 15
It comprises a transformer 16, a ringing bell voltage generating circuit 17 that performs a ringing tone generation function, and a relay switch 18. C described later in the G3 facsimile apparatus body 1
The relay switch 18 connected to the ML relay 41 is provided on a line between the G3 facsimile machine main body 1 and the G4 facsimile adapter 10, and the G3 facsimile machine main body 1
The connection target is switched between the audio signal codec unit 12 via the transformer 16 and the calling bell voltage generation circuit 17. A line current supply circuit 15 is connected to a line between the relay switch 18 and the transformer 16. Line current supply circuit 15
Supplies the required current to the line. The transformer 16 separates the line current between the audio signal codec unit 12 and the G3 facsimile apparatus main body 1. The ringing bell voltage generation circuit 17 is controlled by the CPU 13 at the time of an incoming call to generate a ringing tone. In the following description, it is assumed that the G3 facsimile apparatus main body 1 originates a call using the DTMF method.

The G4 facsimile function unit 20 includes a data bus
25, a LAP-B function unit 21 connected to the EP-RO
M22 and S-RAM23. LAP-B
The function unit 21 controls an ISDN B channel protocol to perform actual data communication. EP-ROM 22 and S
The RAM 23 is used for storing programs of the CPU 13, control data, intermediate data, and the like.

In such a G4 facsimile adapter 10, the telephone number called by the G3 facsimile machine body 1 is input to the CPU 13 via the DP-RAM 24 at the time of transmission. In accordance with this, the CPU 13 uses the LAP-D function of the ISDN interface unit 11 to make a call to the ISDN line 2. In the case of G3 communication, facsimile data is G3
The data is transmitted from the facsimile apparatus body 1 to the ISDN line 2 through the relay switch 18, the transformer 16, the audio signal codec unit 12, and the ISDN interface unit 11.

At the time of G4 facsimile communication, G4
Data transmission / reception is performed between the G3 facsimile apparatus main body 1 and the ISDN interface unit 11 via the facsimile function unit 20, and the LAP-B function unit 21 performs packet disassembly and assembly of facsimile data.

FIG. 2 is a diagram showing the internal configuration of the main body 1 of the G3 facsimile apparatus. In FIG. 2, the MPU 31 is a bus
It is connected to the hardware units described below via 40, controls them, and executes various software functions. The reading unit 32 reads a document using, for example, a CCD, and outputs image data of a black and white binary document. The recording unit 33 has, for example, an electrophotographic printer, and prints out the received image data as a hard copy.

The ROM 34 stores various software programs necessary for the operation of the facsimile apparatus of the present invention in advance. The RAM 35 is composed of an SRAM, a flash memory, or the like, and stores temporary data generated when executing software. The image memory 36 is composed of a DRAM or the like, and stores image data to be transmitted or received image data. The image codec unit 37 compresses and expands image data. The operation unit 38 includes character keys, numeric keys (numerical keys), speed dial keys, one-touch dial keys, various function keys, and the like necessary for operating the facsimile apparatus of the present invention.

The G3 modem 39 is connected to one switching terminal (terminal a) of the CML relay 41 via the line transformer 42, and is connected to the relay switch 18 of the G4 facsimile adapter 10 by switching control of the CML relay 41. It has become so. In FIG. 2, one line of the telephone is shown as being divided into two lines (+) and (-).
In FIG. 2, these two lines are bundled and shown by one line. Further, the G3 modem 39 generates a pseudo ringback tone described later. A call bell detector 43 for detecting a call bell from the G4 facsimile adapter 10 is connected to the other switching terminal (terminal b) of the CML relay 41, and notifies the MPU 31 of the detection of the call bell. .

Reference numeral 44 denotes an H relay, to which a non-switching terminal is connected an attached telephone 45 and an off-hook detector 46 for detecting the off-hook state of the telephone 45. One switching terminal (terminal a) of the H relay 44 has a DC-DC converter 47 for sounding the telephone 45.
When the terminal a is selected, the output of the DC-DC converter 47 is turned on and off by the photocoupler 48 to output a 16 Hz signal so that the telephone 45 sounds. The other switching terminal (terminal b) of the H relay 44 is connected to the terminal b of the CML relay 41.

Next, the operation will be described. FIG.
5 is a flowchart showing a procedure of an operation at the time of reception by the 4-facsimile adapter 10. The relay switch 18
Is normally connected to the transformer 16 side (the upper side in FIG. 1).

First, when there is an incoming call from the ISDN line 2 (step S1: YES), the CPU 13 first checks the progress identifier and checks whether or not the incoming communication is a voice signal (step S2). Specifically, the transmission capability (bearer capability) sent from the outside upon receiving a call is 3.1k
If it is Hz audio or voice, it is determined to be an audio signal, and if it is unlimited, it is determined to be a G4 signal. If the communication received is other than a voice signal (step S2: NO), the CPU 13 determines that the communication is G4 facsimile communication and causes the G4 facsimile function unit 20 to perform processing.

On the other hand, if the incoming communication is a voice signal (step S2: YES), the CPU 13 calls the relay switch 18 and determines that the communication is G3 facsimile communication or voice communication, and the bell voltage generation circuit 17 side (FIG. 1). (Lower side) (step S3), and then the ringing bell voltage generation circuit 17
Side to send a control signal to ring the calling bell (step S4).

Next, the CPU 13 determines whether or not the G3 facsimile apparatus main body 1 is in the off-hook state by the DP-RAM 24.
(Step S5). If it is in an off-hook state (step S5: YES), that is, if the G3 facsimile apparatus body 1 is in the automatic incoming call mode (facsimile standby mode or telephone / facsimile standby mode) and automatically goes off-hook in response to the calling bell, or If the telephone 45 goes off-hook by manual operation even when the G3 facsimile apparatus body 1 is in the manual incoming call mode (telephone standby mode), the CPU 13 returns the relay switch 18 to the transformer 16 (step S6), and The ringing of the calling bell by the voltage generation circuit 17 is stopped (step S7). Then, G3 facsimile communication or voice communication is executed by the G3 facsimile apparatus main body 1 (step S8). This G3 facsimile communication or voice call is performed while the off-hook state continues, and when the on-hook state is set (step S
9: YES), the ISDN communication ends.

On the other hand, if the on-hook state is established in step S5 (step S5: NO), the CPU 13 causes the ringing bell voltage generation circuit 17 to stop ringing the ringing ring when a predetermined time has elapsed (step S10: YES). The relay switch 18 is returned to the transformer 16 side (step S11). G3 facsimile machine body 1
Is set to the mode of not automatically receiving a call (telephone standby mode), this operation is performed unless a manual operation is performed.

Next, the control operation of the G3 facsimile machine body 1 will be described with reference to the flowchart of FIG. In the standby state, the CML relay 41 and the H relay 44 are both connected to the terminal b.

When a calling bell is input from the G4 facsimile adapter 10 (step S21), the current standby mode of the G3 facsimile apparatus body 1 (one of facsimile mode, telephone / facsimile mode, and telephone mode).
Mode is determined (step S22).

If the standby mode is the facsimile mode (S22: A), the CML relay 41 is switched to the terminal a to connect the line with the G4 facsimile adapter 10 (step S23), and the G3 facsimile communication is executed. (Step S24). Then, after the end of the G3 facsimile communication, the CML relay 41 is returned to the terminal b, the line is disconnected (step S33), and a call release is instructed to the G4 facsimile adapter 10 through the DP-RAM 24 (step S34). The process ends.

If the standby mode is the telephone / facsimile mode (S22: B), the CML relay 41 is switched to the terminal a to connect the line with the G4 facsimile adapter 10 (step S25), and the G3 modem 32 The transmission of the generated pseudo ringback tone is started (step S2).
6). Next, the H relay 44 is switched to the terminal a, and DC-
The driving of the pseudo bell for the telephone 45 by the DC converter 47 and the photocoupler 48 is started (step S27). Then, CNG (calling tone) is transmitted to the G3 modem.
It is determined whether or not it has been detected in 39 (step S28). CN
If G is not detected (S28: NO), it is determined whether or not the telephone 45 is in an off-hook state based on the detection result of the off-hook detector 46 (step S29). If the telephone 45 is in the on-hook state (S29: NO), it is determined whether or not a predetermined time has elapsed from the point of connection of the line (step S30). If the predetermined time has not elapsed (S30:
NO), the process returns to step S28, and the determination process of CNG detection and off-hook state detection is repeated.

When CNG is detected in step S28 (S28)
28: YES), and if the predetermined time has elapsed in step S30 (S30: YES), G3 facsimile communication is executed (step S24). Then, after the end of the G3 facsimile communication, both the CML relay 41 and the H relay 44 are returned to the terminal b to disconnect the line (step S33), and the DP-R
A command to release the call is issued to the G4 facsimile adapter 10 via the AM 24 (step S34), and the process ends.

If the off-hook state of the telephone 45 is detected in step S29 (S29: YES), a voice call is executed (step S32). Then, after the end of the call, the line is disconnected (step S33), a command to release the call is issued to the G4 facsimile adapter 10 via the DP-RAM 24 (step S34), and the process ends.

If the standby mode is the telephone mode (S22: C), it is determined whether or not the telephone 45 is in an off-hook state (step S31), and when it is detected that the telephone 45 is in an off-hook state (S31: YES). Then, a voice call is executed (step S32). Then, after the end of the call, the line is disconnected (step S33), and a call release is instructed to the G4 facsimile adapter 10 via the DP-RAM 24 (step S3).
4), the process ends.

[0036]

As described above, in the facsimile apparatus of the present invention, when the transmission capability at the time of reception is digital, G
When the transmission processing is 3.1 kHz audio or voice, reception is performed in accordance with the standby mode of the G3 facsimile apparatus main body, that is, whether the G3 facsimile apparatus is a facsimile communication or a telephone is performed by the G3 facsimile apparatus main body. G3 mode facsimile reception is performed when the standby mode is the facsimile mode, and when the standby mode is the telephone / facsimile mode, the G3 mode is selected unless an off-hook of the telephone is detected within a predetermined time. Facsimile reception of
G3 facsimile communication or telephone selection G3
This can be performed according to the standby mode of the facsimile machine main body, and when the G3 facsimile machine main body is optionally provided with a G4 communication function as an option, the function of the G3 facsimile machine main body can be utilized as it is, and the G3 facsimile machine main body can be used. There is no need to change the configuration much.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a facsimile apparatus of the present invention.

FIG. 2 is a diagram showing an internal configuration of a main body of the G3 facsimile apparatus of FIG. 1;

FIG. 3 is a flowchart showing an operation procedure in a G4 facsimile adapter in the facsimile apparatus of the present invention.

FIG. 4 is a flowchart showing an operation procedure in a G3 facsimile apparatus main body in the facsimile apparatus of the present invention.

[Explanation of symbols]

 1 G3 facsimile machine main body 2 ISDN line 10 G4 facsimile adapter 13 CPU 31 MPU 39 G3 modem 45 Telephone 46 Off-hook detector

Claims (3)

[Claims] 1. A G4 facsimile apparatus main body has a G4
In a facsimile apparatus to which a communication function of a G3 system and a G4 system can be added, a judging means for judging whether or not a communication is a G4 system at the time of reception, and a G4 communication by the judging means. A facsimile apparatus comprising: a processing unit for performing a process according to a standby mode of the facsimile apparatus body when the determination is made. 2. The facsimile apparatus according to claim 2, wherein said judging means judges that the communication is not G4 communication, and furthermore, if said facsimile apparatus main body is in a facsimile mode, said processing means performs G3 facsimile reception. The facsimile apparatus according to claim 1, wherein 3. A means for detecting an off-hook of a telephone of the facsimile apparatus main body, wherein the determination means detects
If it is determined that the communication is not the four-mode communication and the standby mode of the facsimile apparatus is the telephone / facsimile mode, the processing means does not detect the off-hook of the telephone within a predetermined time, and receives the G3-mode facsimile reception. The facsimile apparatus according to claim 1, wherein the facsimile apparatus is configured to perform the following.