JPH07288599A - Fax machine - Google Patents

Abstract

(57) [Abstract] [Purpose] A call waiting function is realized without interrupting the line due to an error in the other party's terminal during communication regardless of the interruption call from either the telephone or the facsimile machine during facsimile communication. A facsimile machine is provided. [Structure] The CPU 1 stops the transmission of the document image data and transmits a message to that effect to the terminal of the transmission partner when switching the line in response to an interrupt call signal detected during the transmission of the document image data. By stopping the reception, the other terminal during communication does not disconnect the line due to an error interruption, and the terminal related to the interrupt call is identified by whether it is a telephone or a facsimile machine. To communicate. Then, after this communication is completed, the transmission of the document image data is restarted.

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. When the call waiting function is installed, it is desired to be able to deal with whether the terminal related to the interrupt call is a telephone or a facsimile machine.

The present invention has been made under such a background, and an object of the present invention is to make an error in the partner terminal during communication even if the telephone call or the facsimile machine responds to an interrupt call during facsimile communication. An object of the present invention is to provide a facsimile apparatus that can realize a call waiting function without interrupting and disconnecting the line.

[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 transmission of document image data and a fact that the interruption calling signal is detected. An informing means for outputting and informing
The transmission / reception stop means for temporarily stopping the transmission of the original image data and the reception operation of the terminal of the other party of the original image data transmission, and the line connected to this apparatus are interrupted and called from the terminal of the other party of the original image data transmission. Line switching means for switching to a terminal related to the above, identification means for identifying whether the terminal related to the interrupt call is a telephone or a facsimile machine,
An interrupt communication control means for controlling communication with a terminal relating to an interrupt call based on the identification result by the identifying means, and transmission of the manuscript image data after the interrupt communication control by the interrupt communication control means is completed. Transmission restarting means for restarting, and when the detecting means detects an interrupt call signal, the notification means is notified, and the transmission / reception stopping means temporarily stops the transmission / reception of the document image data. After switching the line by the line switching means and performing communication with the terminal relating to the interruption call based on the identification result by the identification means under the control of the interruption communication control means, by the transmission resuming means. It is configured to restart the transmission of the document image data.

[0007]

When the interrupt calling signal is detected by the detecting means, the notification means is notified, the transmission / reception stopping means suspends the transmission / reception of the document image data, and the line switching means switches the line. Under the control of the interrupt communication control means, based on the identification result by the identification means, a call or a facsimile communication is performed with the terminal related to the interrupt call, and then the transmission restart means transmits the original image data. Transmission is resumed.

As described above, when the line is switched in response to the interrupt call signal detected during the transmission of the original image data, the transmission / reception of the original image data is temporarily stopped, and by this temporary stop, the other terminal communicating Not to disconnect the line due to an error interruption, and to identify whether the terminal relating to the interrupt call is a telephone or a facsimile machine and perform corresponding communication, thereby making the terminal relating to the interrupt call. Realizes the call waiting function regardless of whether it is a telephone or a facsimile machine.

[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 (Tx1) to the facsimile machine 24 (Rx).
When a call waiting interrupt signal (400 Hz) from another telephone 21a or a facsimile machine 21b (Tx2) is input through the exchange 23 while transmitting facsimile data (original image data) to 1). Indicates that the facsimile machine 22 (Tx1) on the transmission side temporarily stops the transmission operation and transmits a signal for holding the line on the reception side to the facsimile machine 24 (Rx1) on the reception side, and an affirmative response thereto. Other phone 2 after
1a or the facsimile device 21b (Tx2) to perform an interrupt call or an interrupt reception of the document image data, and after this interrupt call or interrupt reception is completed, the original image to the receiving facsimile device 24 (Rx1) Resume sending data.

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, the transmitting side (Tx
1 or Tx2), the transmitting side (Rx1 or Rx2) 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 transmitting the facsimile data after performing such a pre-procedure.

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

The CPU 1 of the transmitting facsimile machine
First, the document image data (facsimile data) is transmitted after performing the above-described pre-procedure (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 transmission 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, when the line switching instruction is issued, the process proceeds to step S6, and when the line switching instruction is not issued, the process returns to step S1 to continue the transmission of the document image data.

In step S6, the transmission of the document image data is temporarily stopped. Then, PRI-MPS (procedure interruption multi-page signal) is transmitted to the partner terminal (step S).
7). Next, it is determined whether or not a PIP (procedure interruption positive signal) is received from the partner terminal in response to the PRI-MPS (step S8). As a result, when the PIP is not received, the reading restart command is given to the scanner 5 and the transmission procedure start command is given to the communication unit 6 to command the transmission restart of the document image data (step S
10) Then, the process returns to step S1 to transmit the document image data.

Upon receiving the PRI-MPS (procedure interruption multi-page signal), the partner terminal stops receiving the original image data and is put on hold with the line to the apparatus connected. The error is not interrupted.

If it is determined in step S8 that the PIP has been received, the line connected to this device is switched from the transmission partner terminal to the call waiting interrupt calling side (step S8).
9). Then, it is determined whether or not the calling tone CNG is received in order to determine whether the device that made the call waiting interrupt call is a telephone or a facsimile machine (step S11). As a result, when the calling tone CNG is not received, it means that the device that made the call waiting interrupt call is a telephone, so wait until the call by the call waiting is completed (steps S14, S1).
5) and proceeds to step S16.

On the other hand, when the calling tone CNG is received, it means that the device that has called the waiting call interruption call is the facsimile machine. Therefore, the CED (callee identification) signal)
Is transmitted (step S12) and the ITU-T recommendation T. Three
Phases B to D of the processing procedure of 0 are performed to receive the manuscript image data from the facsimile apparatus that called the call waiting interrupt (step S13, see FIG. 3), and after the reception is completed, the process proceeds to step S16. .

In step S16, the line connected to this apparatus is switched to the transmission destination terminal side. And from the switch 4
It is determined whether or not a line connection has been made depending on whether or not a sound of 00 Hz is input (step S17). As a result, if the line connection is not established, the process ends. on the other hand,
If the line connection is established, a calling tone CNG is sent to the partner terminal to signal the restart of the original image data transmission (step S18), and a DIS (digital identification signal) is sent in response to the calling tone CNG. It is determined whether or not it has been received (step S19). As a result, when the DIS is received, the process proceeds to step S10, and the transmission of the document image data is restarted by instructing to restart the transmission of the document image data. On the other hand, when DIS is not received, the process ends.

[0027]

As described above, when the interrupt call signal is detected during the transmission 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. It is configured to identify whether the terminal related to the incoming call is a telephone or a facsimile machine, perform corresponding communication, and restart the transmission of the document image data after the communication is completed.

[0028]

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 In addition to preventing disconnection, the terminal related to the interrupt call is identified as either a telephone or a facsimile device by identifying whether the terminal related to the interrupt call is a telephone or a facsimile machine and performing corresponding communication. Even then, it becomes possible to realize the call waiting function.

[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 detecting means for detecting an interrupt call signal during transmission of original image data, a notifying means for outputting and notifying that an interrupt call signal has been detected, and temporarily stopping transmission of original image data. At the same time, the transmission / reception stopping means for temporarily stopping the reception operation of the original image data transmission partner terminal, and the line switching means for switching the line connected to this apparatus from the original image data transmission partner terminal to the terminal for interrupt call And an identification means for identifying whether the terminal relating to the interruption call is a telephone or a facsimile device, and interruption communication control for controlling communication with the terminal relating to the interruption call based on the identification result by the identification means. Means and transmission restart means for restarting the transmission of the document image data after the interrupt communication control by the interrupt communication control means is completed, and the detecting means detects an interrupt call signal. At that time, the notification means is notified, the transmission / reception stop means temporarily stops the transmission / reception of the document image data, the line switching means performs the line switching, and the interrupt communication control means controls the line. A facsimile apparatus, characterized in that, after communication with a terminal relating to an interrupt call is performed based on an identification result by the identification means, the transmission of the original image data is restarted by the transmission restart means. 2. The transmission / reception suspending means suspends the receiving operation of the terminal of the transmission partner by transmitting a signal for suspending the transmission of the document image data to the terminal of the transmission partner of the document image data. Claim 1 characterized by the above.
The described facsimile machine.