JPH04280564A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To set a time of a FAX-telephone automatic changeover function in excess of a time-up time of a T310 timer in the facsimile equipment connecting to an ISD network. CONSTITUTION:When an ISDN control section 7 receives a 'setup' message, a message detection section 7a outputs a setup detection signal to a call control section 7b. Upon the receipt of the setup detection signal, the call control section 7b starts a setup reception transmission section 7d to output a 'setup reception' message to an ISD network. An information transfer capability discrimination section 7c analyzes an information transfer capability in parallel with the processing above and outputs a call transmission command signal to a call transmission section 7e when the result of analysis indicates a 3.1kHz audio signal or a voice signal. Upon the receipt of the call transmission command signal and the setup reception transmission end signal, a call transmission section 7e outputs a 'call' to the ISD network. Upon the receipt of the ISD network, stops the T310 timer, As a result, even when the 'reply' is not received within a specified 10sec, the line interruption is not caused.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine having an automatic facsimile-telephone switching function.

0002

2. Description of the Related Art Conventionally, there has been a FAX machine equipped with an automatic FAX-telephone switching function so that a telephone line can be used for both a facsimile machine (hereinafter abbreviated as FAX) and a telephone. The FAX-telephone automatic switching function realizes the following functions.

As shown in FIG. 4, under normal conditions, a telephone line 1 is connected to a telephone set 4 via a switching device 3. As shown in FIG. At time t0 in FIG. 5, when a call is received via telephone line 1, timer 2 starts counting. When the telephone is off-hook within a predetermined time (time t0 to t1 in FIG. 5), the incoming call is connected to the telephone 4. However, if it is not off-hook within the predetermined time, a time-up signal from the timer 2 causes the switch 3 to
Switched to AX5 side. When the telephone line 1 and the FAX 5 are connected, the FAX 5 starts communicating with the other party using a predetermined protocol.

[0004] The FAX-telephone automatic switching function is currently installed in G2/G3 FAX machines connected to the public telephone network.

[0005]

[Problem to be solved by the invention] In recent years, the spread of ISDN networks has been remarkable, and with this,
It is expected that 2/G3 FAX will be equipped with the FAX-telephone automatic switching function.

[0006] A FAX connected to a conventional ISDN network is
When receiving "Call Setup" in the D channel protocol, a FAX terminal capable of receiving calls returns "Call Setup Acceptance". After the FAX terminal returns the call setup acceptance, it rings the bell. When the handset is picked up in response to the ringing of the bell, the FAX terminal accepts the call setup and then selects "Answer".
to be sent back. On the other hand, if the handset cannot be picked up, a "response" is sent out after a certain period of time and communication is started.

[0007] However, the ISDN network starts activating the T310 timer after receiving the "call setup acceptance", and if the "response" is not received by the time the T310 timer times up (10 seconds), disconnects the call. For this reason, the FAX installed in the FAX connected to the ISDN network is
There was a problem in that a large restriction was added to the time setting of the AX-telephone automatic switching function.

[0008] The T310 timer is a timer condition for "incoming call reception" specified by the ISDN network side, and the timer start condition is "call setting reception" and the stop condition is "ringing", "answer" or "disconnection". ”, the timer time is specified as 10 seconds.

SUMMARY OF THE INVENTION An object of the present invention is to provide a facsimile machine which eliminates the above-mentioned problems of the conventional apparatus and is capable of setting a time for an automatic FAX-telephone switching function that exceeds the time-up time of the T310 timer.

0010

[Means for Solving the Problems] In order to achieve the above object, the present invention provides for
It is characterized by having an information transfer ability determination section that determines information transfer ability from a message, and a call sending section that sends out a "call" when the information transfer ability determination section determines that it is 3.1KHz audio or voice. There is.

[0011]

[Operation] According to the present invention, the information transfer capability determination section in the "call setup" message received via the ISDN network is
A "call" is sent out if it is KHz audio or voice.

[0012] The T310 timer of the ISDN network
When received, the time will stop counting. As a result, even if the above-mentioned "response" is not received within the specified 10 seconds, the line will not be disconnected, and it becomes possible to set an automatic fax-telephone switching time that is longer than the T310 timer time-up time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings. FIG. 2 is a block diagram showing the hardware configuration of a facsimile machine to which the present invention is applied. In the figure, 1 is a scanner that reads document information and converts it into electrical signal image information, and 2 is a codec (2) that encodes image information using an encoding method with a high compression rate or decodes encoded image information.
3 is a telephone (handset) that is used to switch between FAX and fax, and 4 is a changeover switch. Also,
5 is a G3 control unit that outputs protocol signals of the G3 facsimile machine and controls communication with the other party; 6 is an analog/
Digital (A/D), Digital/Analog (D/A
) converter, 7 is an ISD that coordinates communication with the ISDN network
N control section.

Further, 8 is a printer that prints out the received image information on paper, 9 is an operation panel having a numeric keypad, function keys, a display section, etc., and 10 is a bell that rings when an incoming call is received. Reference numeral 11 denotes a system control section that controls the entire operation of the facsimile. The system control unit 11 includes a CPU 11
a, ROM11b, RAM11c and timer 11d
It is included. 12 is an I/O control section.

An outline of the operation in FIG. 2 will be explained with reference to the flowchart in FIG.

When the ISDN control unit 7 receives the "call setting" (step S1 is affirmative), it sends "call setting acceptance" (step S2). If the information transfer capability is 3.1 KHz audio or voice (step S3 is affirmative), the ISDN control unit 7 further sends a "call" (step S3).
4) Notify the system control unit 11 of the incoming call.

When the system control unit 11 is notified of the incoming call, it stores the preset FAX-telephone automatic switching time in the RAM.
11c and set it to timer d. continue,
This timer d is started (step S5).

If the handset 3 is lifted and goes off-hook before the timer d times out (step S6 is affirmative), the system control section 11 switches the switch 4 to the handset 3 side via the I/O control section 12. Also, the ISDN control unit 7
response” is sent to enable a call (step S10).
.

If the handset 3 is not picked up before the timer d times out (step S6 is negative, step S7 is positive), the system control unit 11
The switch 4 is switched to the G3 control section 5 side via the O control section 12 (step S8). Further, the ISDN control unit 7 sends a "response" to the ISDN network to enable communication (step S9). Note that when step S3 is negative, the process advances to step S11, and processing according to the information transfer capability is performed.

Next, one embodiment of the present invention will be described in detail with reference to the functional block diagram of FIG. Figure 1 shows the ISDN
3 is a functional block diagram showing the functions of a control section 7. FIG.

7a is a message detection unit which detects the contents of the received message and outputs signals of "call setting detection", "call setting reception detection", ..., "disconnection detection", and "response detection". do. Reference numeral 7b denotes a call control unit, which sends and receives the signals shown in the figure to and from the system control unit 11, and also activates the blocks shown in the figure, such as the call setting acceptance sending unit 7d and the disconnection sending unit. , and serves to send out each signal as a transmission message to the ISDN network.

Reference numeral 7c denotes an information transfer capability determining section, which determines whether the information transfer capability is 3.1 KHz or voice. Reference numeral 7d denotes a call setting acceptance sending unit, which sends a "call setting acceptance" to the ISDN network and also outputs a call setting acceptance sending end signal. 7e is a call sending unit, which sends a "call" to the ISDN network.

Next, the operation of FIG. 1 will be explained. Said ISD
When the N control section 7 receives the "call setting", the message detection section 7a outputs a call setting detection signal to the call control section 7b. When the call control section 7b receives the call setting detection signal, it activates the call setting acceptance sending section 7d and outputs "call setting acceptance" to the ISDN network. In parallel with this, the information transfer ability determination section 7c
analyzes the information transfer capability, and if the analysis result is 3.1 KHz audio or voice, outputs a call sending instruction signal to the calling sending unit 7e.

When the call sending section 7e receives a calling sending instruction signal from the information transfer capability determining section 7c and a call setting acceptance sending end signal from the call setting receiving sending section 7d, it outputs a "call" to the ISDN network. . When the ISDN network receives this "call", it stops the T310 timer. As a result, even if the "response" is not received within the prescribed 10 seconds, the line disconnection operation will not be performed.

Therefore, according to the present invention, the FAX-telephone automatic switching time can be set to an appropriate time of 10 seconds or more. If the handset 3 is lifted during the FAX-telephone automatic switching time, the switch 4
is switched to the handset 3 side, and the ISDN control unit 7 sends a "response" to the ISDN network to enable a call. On the other hand, if the handset 3 is not picked up within the automatic FAX-telephone switching time, the switch 4 is switched to the G3 control section 5 side, the ISDN control section 7 sends a "response" to the ISDN network, and the FAX communication is enable.

As described above, according to this embodiment, when the information transfer capability is 3.1 KHz audio or voice, after the call setup acceptance signal is sent, "Call" is sent to stop the T310 timer. Therefore, it is possible to set an automatic FAX-telephone switching time of 10 seconds or more.

In the above embodiment, the FAX-telephone automatic switching time is set in the timer 11d, but the present invention is not limited to this, and the system control unit sets the number of times the bell 10 (see FIG. 2) rings. The number of times the bell rings may be detected by the CPU 11a of No. 11 and may be substituted for the FAX-telephone automatic switching time.

[0028]

As is clear from the above description, according to the present invention, when the information transfer capability is 3.1 KHz audio or voice, the information transfer capability is 3.1 KHz audio or voice, and after sending the call setup acceptance signal, the ISDN network is
The T310 timer of the ISDN network can be stopped because the call is sent. Therefore, it is possible to set an automatic FAX-telephone switching time that is longer than the time-up time of the T310 timer (10 seconds).

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram showing the hardware configuration of a facsimile device to which the present invention is applied.

FIG. 3 is a flowchart for explaining the operation of this embodiment.

FIG. 4 is a functional block diagram illustrating an automatic facsimile-telephone switching function.

FIG. 5 is a time chart illustrating an automatic facsimile-telephone switching function.

[Explanation of symbols]

7...ISDN control section, 7a...message detection section, 7b...
Call control section, 7c... Information transfer capability determination section, 7d... Call setting reception/sending section, 7e... Call sending section, 11... System control section.

Claims (1)

[Claims] Claim 1: An information transfer capability determining section that determines information transfer capability from a "call setup" message received via an ISDN network, and when the information transfer capability determining section determines that the message is 3.1 KHz audio or voice, A facsimile device comprising a call sending section that sends out a "call."