JPH07288600A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To provide a facsimile equipment capable of realizing a catchphone function without interruption of a line by erroneous interruption of a busy destination terminal equipment even when an interrupt call is replied during facsimile communication. CONSTITUTION:When a CPU 1 selects a line in response to an interrupt call signal detected during transmission of original image data, the CPU 1 stops tentatively reception of the original image data and sends a signal representing it to a terminal equipment of transmission destination to stop tentatively the reception so that the busy destination terminal equipment is not interrupted in error to interrupt a line, the communication with the terminal equipment relating to an interrupt call is made and then the reception of the original image data is started again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine having a call waiting (registered trademark) function.

[0002]

2. Description of the Related Art In recent years, various functions have been realized as functions of a telephone, and as a particularly convenient function among telephone functions, a third party responds to a call from a third party during a call and is interrupted by the third party. Call waiting function that can be called is known.

On the other hand, the size of facsimile machines has been reduced,
Many small facsimile machines for individuals have enhanced telephone functions. However, conventionally, even though it is a small facsimile machine, a facsimile machine having a call waiting function has not been realized.

[0004]

This is because when a call waiting call (interrupt call) from a third party is answered during facsimile communication, the facsimile machine on the other end of the communication interrupts the line due to an error. It is thought that it is because it cuts.

The present invention has been made under such a background, and an object thereof is not to disconnect the line due to an error interruption of the communicating partner terminal even when responding to an interrupt call during facsimile communication. Another object of the present invention is to provide a facsimile machine capable of realizing a call waiting function.

[0006]

In order to achieve the above object, the facsimile apparatus according to the present invention has a detecting means for detecting an interruption calling signal during reception of original image data and a fact that the interruption calling signal is detected. An informing means for outputting and informing
The transmission / reception stopping means for temporarily stopping the reception of the original image data and the transmission operation of the terminal of the source of the original image data, and the line connecting to this apparatus are interrupt-called from the terminal of the source of the original image data. Line switching means for switching to the terminal related to the interrupt calling signal, and reception restart means for restarting the reception of the document image data after the communication with the terminal corresponding to the interrupt calling signal is completed. Is detected by the notifying means, the transmission / reception stopping means temporarily suspends transmission / reception of document image data, the line switching means performs line switching, and After the communication is completed, the reception resuming means restarts the reception of the document image data.

[0007]

When the detecting means detects the interrupt call signal, the notifying means notifies the operator of the fact, the transmission / reception stopping means temporarily suspends the transmission / reception of the document image data, and the line switching means causes the line. After the switching is performed and the communication with the terminal relating to the interrupt call is completed, the reception restart means restarts the reception of the document image data.

As described above, even when the line is switched and the response is made when the interrupt call signal is detected, the transmission / reception stop means temporarily suspends the transmission / reception of the document image data, thereby communicating with the other terminal. Realizes the call waiting function by not disconnecting the line due to error interruption.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus according to an embodiment of the present invention.

In FIG. 1, 1 is a CPU (Central Processing) for controlling the operation of the entire apparatus.
2) is a ROM (Read Only Memory) in which various programs such as programs corresponding to the flowcharts of FIGS. 4 and 5 described later are preset.
y) 3 is a RAM (Random Access) that stores original image data read by the scanner 7 and original image data relating to reception, and that functions as a work area.
Memory).

Reference numeral 4 is a printer for printing original image data and the like on paper, 5 is an operation panel consisting of a keyboard, a display section, a speaker and the like, and 6 is original image data sent via an analog telephone network or a bus 8. Received, ITU-T
A communication unit that performs modulation / demodulation according to the (former CCITT) recommendation, 7 is a scanner unit that optically reads document information, photoelectrically converts it, and transfers it to RAM 3 as image data, and 8 exchanges data between the above-mentioned components. It is a bus to do.

The present facsimile machine has a call waiting function, and as shown in the schematic diagram of FIG. 2, the facsimile machine 22 (Tx) to the facsimile machine 24 (Rx).
When a call waiting interruption signal (400 Hz) from another telephone 21 (Rx2) is input through the exchange 23 while transmitting facsimile data (original image data) to 1), the facsimile on the receiving side is received. Device 24
(Rx1) sends a signal for suspending the receiving operation and holding the line on the transmitting side to the facsimile device 22 on the transmitting side.
(Tx), an interruption signal is obtained for the transmission, and an interrupt call is made with another telephone 21 (Rx2). After the interrupt call is completed, the facsimile machine 22 (Tx) on the transmission side is sent. ) And the facsimile communication with is resumed.

Communication control in this facsimile apparatus is as follows.
Under the control of the CPU 1, as shown in FIG.
This is performed based on the binary code control procedure defined in Recommendation T30 of T (old CCITT).

That is, in FIG. 3, when dialing is performed from the transmitting side, the transmitting side transmits a calling tone CNG to the receiving side. Then, the receiving side (called station) C
An ED (callee identification signal) and a DIS indicating all the functions of the called station are sent to the transmitting side. Then, the transmission side transmits the DCS indicating the function selected from the functions indicated by DIS and the training signal TCF to the reception side. The receiving side sends CFR (reception preparation confirmation) to the transmitting side. Then, the transmitting side starts the communication of the facsimile data after performing such a pre-procedure.

Next, the reception control operation performed after performing the above-mentioned pre-procedure will be described with reference to the flowcharts of FIGS.

The CPU 1 of the facsimile machine on the receiving side is
First, when the above-mentioned pre-procedure is completed, the document image data (facsimile data) is received (step S1). Then, it is determined whether or not the call waiting interruption call signal is detected (step S2).

In this case, the frequency characteristic of the telephone line is shown in FIG.
As shown in, the normal telephone line has a bandwidth of 300H.
z-3400 Hz, and the submarine coaxial cable for international calls has a bandwidth of 300 Hz-3000 Hz.
Further, as shown in FIG. 7, the frequency bandwidth of the binary code control procedure signal is approximately 1400 Hz to 2000 Hz, and as shown in FIG. 8, the frequency bandwidth of the document image data is approximately 500 Hz to 3300 Hz. is there.

Therefore, the frequency of the call waiting interruption calling signal is set to 400 Hz so that the call waiting interruption calling signal can be received so as to be distinguishable from the binary code control procedure signal and the document image data. That is, the exchange 23 shown in FIG.
During the facsimile communication between 2 and 24,
From the other telephone 21 to these facsimile machines 22, 24
When the telephone number of the user is dialed, an interruption call signal of a 400 Hz call waiting telephone is transmitted to the facsimile devices 22 and 24.
Send to.

Since the frequency of the call waiting interruption call signal is 400 Hz as described above and is not included in the frequency band of the binary code control procedure signal and the document image data, the call waiting interruption call signal is a band. It is detected by passing it through a pass filter.

In step S2, if the call waiting interrupt call signal is not detected, the process returns to step S1 to continue the reception of the document image data. On the other hand, when the waiting call interruption signal is detected, the fact is displayed on the display unit of the operation panel 5 or the voice is output by the cape car to notify the operator (step S).
3).

Then, it is judged whether or not the line automatic switching mode is set by the line automatic switching key (not shown) on the operation panel 5 (step S4). If the line automatic switching mode is set, step S6 is performed. If the automatic line switching mode is not set, it is judged whether or not the operator off-hooks the handset (not shown) to instruct the line switching (step S5). As a result, if the line switching instruction is issued, the process proceeds to step S6. If the line switching instruction is not issued, the process returns to step S1 to continue the reception of the document image data.

In step S6, since the original image data may not be normally received due to the input of the call waiting interrupt signal, it is determined whether or not the original image data is normally received. As a result, when the manuscript image data is normally received, the reception of the manuscript image data is temporarily stopped and a PIP (procedure interruption positive signal) is transmitted to the transmission source terminal, so that the call waiting call is called. Is notified (step S7), and the process proceeds to step S9.
On the other hand, if the original image data is not received normally,
By suspending the reception of the document image data and transmitting a PIN (procedure interruption negative signal) to the terminal of the transmission source, the fact that there is an interruption call of the call waiting call is notified (step S8), and the process proceeds to step S9. move on.

When the terminal of the transmission source receives the PIP (procedure interruption positive signal) and restarts the transmission of the original image data, it restarts the transmission from the beginning of the untransmitted original image data, When the PIN (procedure interruption negative signal) is received, when the transmission of the document image data is restarted, the transmission is restarted from the leading part of the document image data of the page including the part which was not normally received.

The source terminal is PIP or P
By receiving the IN, the line with the apparatus is kept in the hold state without error interruption, and operator intervention is required to continue the transmission. Then, when the operator's intervention is performed, the transmission source terminal transmits PRI-MPS (procedure interruption multi-page signal) as a signal to that effect.

Therefore, in step S9, PRI-MP
It is determined whether or not S (procedure interruption multi-page signal) is received from the transmission source terminal. As a result, when the PRI-MPS is not received, the process returns to step S1 to receive the document image data.

On the other hand, when the PRI-MPS is received from the transmission source terminal, the line connected to this apparatus is switched from the transmission source terminal to the call waiting interruption calling side (step S1).
0), and waits for the call waiting to end (steps S11 and S12).

When the call ends, the line connected to this device is switched to the terminal of the transmission source (step S1).
3) It is determined whether or not the line connection is made depending on whether or not the sound of 400 Hz is input from the exchange (step S14). As a result, if the line connection is not made,
finish. On the other hand, if line connection is made, CED
The DIS is transmitted to the source terminal (step S15), and it is determined whether or not the DCS is received in response to the CED / DIS (step S16). As a result, when the DCS is received, the normal pre-procedure is performed, the process returns to step S1, and the reception of the document image data is restarted. On the other hand, when DCS is not received, the process ends.

[0028]

As described above, when the interrupt call signal is detected during the reception of the document image data, the operator is informed of the fact, the transmission / reception of the document image data is temporarily stopped, and the line is switched to interrupt the call. After the communication with the terminal related to the incoming call is completed,
Reception of original image data is restarted.

[0029]

As described above, according to the present invention,
When switching lines in response to an interrupt call signal detected during transmission of original image data, transmission / reception of original image data is temporarily stopped, and this temporary stop causes the other terminal during communication to interrupt the line By not disconnecting, the call waiting function can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram showing a communication system to which a facsimile apparatus according to an embodiment of the present invention is applied.

FIG. 3 is a sequence diagram showing communication control according to a binary code control procedure.

FIG. 4 is a flowchart showing a transmission control operation.

FIG. 5 is a continuation of the flowchart of FIG.

FIG. 6 is a diagram showing frequency characteristics of a normal telephone line.

FIG. 7 is a diagram showing frequency characteristics of a binary code control procedure signal.

FIG. 8 is a diagram showing frequency characteristics of original image data.

[Explanation of symbols]

 1 ... CPU 2 ... ROM 3 ... RAM 4 ... Printer 5 ... Operation panel 6 ... Communication unit 7 ... Scanner 8 ... Bus

Claims (2)

[Claims] 1. A detection means for detecting an interrupt call signal during reception of original image data, a notification means for outputting and notifying that an interrupt call signal has been detected, and temporarily stopping reception of original image data. In addition, the transmission / reception stopping means for temporarily stopping the transmission operation of the original image data transmission source terminal, and the line switching means for switching the line connected to the apparatus from the original image data transmission source terminal to the interrupt call terminal And a reception resuming means for resuming the reception of the document image data after the communication with the terminal corresponding to the interruption calling signal is completed, and when the interruption calling signal is detected by the detecting means, Is notified by the notifying means, the transmission / reception stopping means temporarily suspends the transmission / reception of the document image data, the line switching means causes the line to be switched, and the communication with the terminal relating to the interrupt call is completed. After facsimile apparatus characterized by being configured so as to resume the reception of the original image data by the reception resuming means. 2. The transmission / reception suspending means suspends the transmission operation of the terminal of the transmission source by transmitting a signal to the terminal of the transmission source of the original image data to the terminal of the transmission of the original image data. The facsimile apparatus according to claim 1, wherein: