JPH0730690A - Offtalk facsimile communication system - Google Patents

Abstract

PURPOSE:To add an adapter so as to use the facsimile for telephone line for the offtalk communication as well, and to use it both for the offtalk communication and the telephone line. CONSTITUTION:The device is provided with a means 93 demodulating a facsimile signal, memory means 96 storing the facsimile signals, means 54 discriminating between the offtalk facsimile and the information on voices, means 94 detecting the voltage change of the telephone line, means 97 which calls the facsimile for telephone line without ring and monitors the power supply, means 92 switching the telephone communication and the offtalk communication, and control means 95 which controls these operations. The control means may provide the reception state display. The system itself can be more simplified by omitting memories and demodulators.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offtalk communication service for performing communication when a telephone line is not used, and to a communication system for realizing offtalk facsimile communication.

[0002]

2. Description of the Related Art Conventionally, in an off-talk communication service, a fax machine dedicated to off-talk has been used for communication. The conventional off-talk facsimile communication system is configured as shown in FIG. 7, and the off-talk dedicated facsimile apparatus is a reception-only facsimile apparatus. In FIG. 7, reference numeral 1 is a telephone exchange office, 11 is an exchange, and 2 is an intra-talk communication internal device accommodated in the telephone exchange office. Although illustrated as a switch for convenience of illustration, a circuit for detecting an incoming signal from the exchange or It has functions such as a voltage change detection circuit for the subscriber line 4 and an amplifier for distributing / amplifying information from the off-talk center device 3. Further, 5 is an off-talk home device, 51 is a switch for switching between use of a telephone line and off-talk communication, 52 is an amplifier for amplifying information from the off-talk center device, 53 is a voltage change of the subscriber line 4 and an incoming call. A detector for detecting signals, 54
Is a control circuit for identifying an ID signal or the like used for an individual call, a group call, etc., and for controlling an off-talk home device, 5
Reference numeral 5 is a main amplifier for driving the speaker. Reference numeral 6 is a telephone, 8 is a speaker used for off-talk communication, and 10 is a facsimile device dedicated to off-talk. In the conventional facsimile communication system, a signal for cutting off the speaker 8 used for off-talk communication and a facsimile signal are simultaneously transmitted from the off-talk center device 3. In the off-talk home device 5, the main amplifier 5 is detected by detecting the cutoff signal.
5 is cut off, and the signal from the center device is transmitted to the facsimile device 10 dedicated to off-talk. In the off-talk communication, since there is no signal from the off-talk home device 5 to the off-talk center device (hereinafter, the up-direction), the off-talk center device 3 does not need to receive the up-direction signal and sends the facsimile signal unidirectionally. . Further, the off-talk-only facsimile device 10 prints the received signal as it is, and does not transmit the upstream signal.

Since the conventional off-talk facsimile communication system is configured as shown in FIG. 7, the off-talk facsimile device is only for reception and can be used only for off-talk facsimile communication, and has a telephone line facsimile device. However, there is a drawback in that a facsimile machine dedicated to off-talk must be purchased. In addition, even if the facsimile machine dedicated to off-talk is included, it cannot be used on the telephone line. Further, in the off-talk-only facsimile apparatus, even if an error occurs during transmission, the center apparatus cannot be notified and printing is performed with an error.

[0004]

When a facsimile machine for a telephone line is used as it is for off-talk communication, 48-V power supply, which is an interface condition of a telephone line which is not always used from an off-talk home apparatus,
It is necessary to provide an incoming signal of 75V, 16Hz,
There is a drawback that the off-talk home device becomes expensive and large in size. In addition, since the facsimile apparatus for telephone lines is used by closing the loop of the line, it is a fatal drawback that the telephone is in a use state (on-talk state as opposed to an off-talk state) and off-talk communication is stopped. There is. On the other hand, when a facsimile device dedicated to off-talk is used in a telephone line, there are drawbacks such as not being able to make a call because the line loop is not closed, being unable to start up with an incoming signal of 75V, 16 Hz, and being unable to send a facsimile because it is only for receiving. is there. That is, since the telephone line facsimile apparatus is used in the on-talk state and the off-talk dedicated facsimile apparatus is used in the off-talk state, the interface conditions are different from each other and cannot be used as they are.

The present invention solves the above problems, and an adapter is added so that a facsimile apparatus for telephone lines can be used for off-talk communication, so that both off-talk communication and telephone lines can be used. It is an object to provide an off-talk facsimile communication system that can be used.

[0006]

The off-talk facsimile communication system of the present invention comprises means for demodulating facsimile signals, memory means for storing facsimile signals, means for identifying information such as off-talk facsimile and voice, and telephone line. Means for detecting a voltage change of the telephone line, a ringing-free call to the facsimile apparatus for telephone lines, and power supply / power supply monitoring means,
It is characterized in that means for switching between telephone call and off-talk communication to be used and control means for controlling these operations are provided. Further, the off-talk facsimile communication system of the present invention includes a means for demodulating facsimile signals, a means for detecting a change in voltage of a telephone line, a means for monitoring and feeding power to a facsimile machine for telephone lines, a telephone call and an off-talk communication. The present invention is characterized in that a means for switching and using, a memory means for storing page information of a facsimile signal, a means for displaying a reception state, and a control means for controlling these operations are provided. Further, the off-talk facsimile communication system of the present invention comprises means for detecting a change in voltage of a telephone line, means for monitoring power supply / feeding to a telephone line facsimile device, and means for switching between telephone call and off-talk communication. A control means for controlling these operations is provided.

[0007]

The facsimile signal sent from the off-talk center device is accumulated in the memory means of the adapter, and after the reception of the facsimile information is completed, the facsimile device for the telephone line is activated by making a silent ringing call to activate it. Communication procedures, such as CCITT Recommendation T.264. 4 (group 3) sends out the stored facsimile information.
Therefore, in communication between the adapter and the facsimile device for the telephone line, error processing or the like can be performed. In addition, the facsimile signal sent from the off-talk center device is directly received by the facsimile device for the telephone line, and the adapter manages and grasps the error occurrence status of these information and the reception status of page information. It is also possible to display the communication status such as the occurrence of an error or to wait for the information at the time of rebroadcasting or retransmission without transmitting the information when the error occurs. In this case, it is not necessary to mount a large amount of memory for several pages, and the adapter can be economically constructed. Furthermore, by configuring so that the error status of facsimile information and page information, etc. are not grasped and managed,
It eliminates the need for expensive memory as well as modem equipment. With such a configuration, the facsimile device for the telephone line can be used for the telephone line and the off-talk communication.
When the telephone line is in the outgoing state during the off-talk facsimile communication, the telephone call (outgoing call) is given priority.
Of course, when an incoming call is received on the telephone line during the off-talk facsimile communication, the incoming call is given priority. However, even if an incoming call is received by the facsimile, the facsimile device can respond to the telephone line. In this way, when the use of the telephone line is finished when the facsimile communication is interrupted, the facsimile communication between the off-talk center device and this adapter is completed, and the facsimile information is stored in the memory means of the adapter. For example, it is possible to restart the transmission from the adapter to the facsimile device and re-send it. Even if the adapter does not have a memory means, the telephone is prioritized in this way in off-talk communication, so it is assumed that the off-talk center device will interrupt the communication, and re-broadcast or re-broadcast on another channel. There is no problem because the operation is performed to send.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment of the present invention, in which 1 is a telephone exchange, 11 is an exchange, and 2 is an internal device for off-talk communication accommodated in the telephone exchange. ,
Although illustrated as a switch for convenience in the figure, a detection circuit of an incoming signal from the exchange 11 for giving priority to a telephone call and switching to a telephone, and a voltage detection circuit of the subscriber line 4 for detecting the transmission of the telephone 6 It also has a function such as an amplifier that distributes / amplifies information from the off-talk center device 3 to a large number of off-talk subscribers. Further, 5 is an off-talk home device, 51 is a switch for switching between use of a telephone line and off-talk communication, 52 is an amplifier for amplifying information from the off-talk center device, 53 is a voltage of the subscriber line 4 and an incoming signal. Is a control circuit for identifying an ID signal or the like for calling a specific area or a specific service subscriber and for controlling the off-talk home device, and 55 is a main amplification circuit of the speaker 8. 6 is a telephone, 7 is a facsimile device, 8 is a speaker used for off-talk communication, and 9 is an adapter for performing off-talk facsimile communication. Here, reference numeral 91 is a switch for transmitting an incoming call and facsimile information stored in the memory to the facsimile apparatus 7 when performing facsimile communication with the off-talk center apparatus by off-talk communication, and 92 is the facsimile apparatus 7 used on a telephone line. A switch for switching whether to use in off-talk communication, 93 is a modem device for facsimile communication or for making a silent ringing call, 94 is a detection circuit for detecting the voltage of the subscriber line, and 95 is an adapter control A control circuit 96 is a memory circuit for accumulating facsimile information sent from the off-talk center device, and 97 is a circuit for monitoring power supply and a power supply loop during off-talk communication of the facsimile device 7.

Next, the operation of the first embodiment will be described with reference to FIG. Since the embodiment of the present invention is configured as described above, the off-talk center device 3 sends a signal for stopping the function of the main amplifier 55 so that the facsimile signal is not output from the speaker 8. This is not necessary in the case of simultaneous broadcast, but when transmitting specific information to a specific customer, an ID code is transmitted from the off-talk center device 3 and the preset ID is set in the off-talk home device 5.
When the code matches, the channel is switched to a specific channel (for example, 1 channel) and a signal reception standby state is set. Here, the ID code is composed of, for example, a PB signal of several digits, or the like, and can be composed of other signals. In FIG. 2, as a signal for stopping the function of the main amplifier 55 so that the facsimile signal is not output from the speaker 8, there is a signal of 600 Hz, for example.
It goes without saying that it may be constituted by a signal, an FS signal or the like. After that, when the facsimile start signal is received, the adapter sends the facsimile signal from the off-talk center device 3 to the control circuit 95 through the modem device 93, and stores the received information in the memory 96. In a normal facsimile communication procedure, an up signal and a down signal (a signal from the off-talk center device 3 to the off-talk home device 5 direction) are used. However, since the up-talk signal is not used in the off-talk communication, the up signal is used. Is not sent. Figure 2
Then, this upstream signal is shown by a broken line and is not transmitted from the adapter 9. Therefore, the off-talk center device 3 starts a timer by assuming these amounts of upstream data, and sends the next downstream data after this time has elapsed. It should be noted that the above description has been made with the modem device 93 because it is generally made into a board or a chip, but it is clear that it may be composed of a demodulator and a silent ringing circuit because there is only downlink information.

When the facsimile information is completed, the off-talk center device 3 sends out a facsimile end signal and, if necessary, an ID release signal. When the adapter 9 receives these signals, it switches the switches 91 and 92 to send a non-ringing call signal to the facsimile device 7, and a normal facsimile communication procedure such as CCITT Recommendation T.264. Memory 9 in adapter 9 by 4 (group 3)
The facsimile information stored in 6 is sent to the facsimile 7. Even if the adapter 9 is added, 92 switches are provided on the telephone line side (shown on the telephone side in FIG. 1) when performing facsimile communication on a normal telephone line.
Therefore, it is possible to communicate on the telephone line without any problem. With this configuration, the facsimile device for the telephone line can be commonly used for both off-talk communication and the telephone line.

During the off-talk facsimile communication, the receiving paper comes out while being printed, so that it can be easily identified that the communication is in progress. To interrupt this, for example, by turning off the power of the facsimile apparatus, the adapter can be used. Since it can be detected by the power feeding circuit 97, it is possible to interrupt or retransmit the off-talk facsimile communication. It has already been described that the off-talk facsimile communication can be interrupted because the telephone call is prioritized if the handset of the telephone is off-hook. Further, when a communication error occurs between the off-talk center device and the adapter, the adapter 9 deletes the erroneous page information from the stored facsimile information or warns that there is an error. can do. This adapter 9 and facsimile device 7
It is needless to say that a recovery procedure such as retransmission can be taken by an ordinary facsimile communication procedure for an error between them.

FIG. 3 shows a second embodiment of the present invention, in which 1 is a telephone exchange, 11 is an exchange, and 2 is an intra-talk communication intra-station device accommodated in the telephone exchange. Although illustrated as a switch for convenience in the figure, a detection circuit for detecting an incoming signal from the exchange, a voltage detection circuit for detecting telephone use of the subscriber line 4, an amplifier for distributing / amplifying information from the off-talk center device 3, and the like. It has a function. Further, 5 is an off-talk home device, 51 is a switch for switching between use of a telephone line and off-talk communication, 52 is an amplifier for amplifying information from the off-talk center device, and 53 is for detecting transmission of the telephone 6. A subscriber line voltage detector and an incoming signal detector, 54 is a control circuit for identifying an ID signal or the like and controlling an off-talk home device, and 55 is a main amplifier for driving the speaker 8. 6 is a telephone, 7 is a facsimile device, 8 is a speaker used for off-talk communication, and 9 is an adapter for performing off-talk facsimile communication. here,
Reference numeral 92 is a switch for switching whether to use the facsimile machine 7 in a telephone line or in off-talk communication,
Reference numeral 93 is a modem device for facsimile communication, 94 is a detection circuit for detecting a voltage of a subscriber line for detecting outgoing and incoming calls, 95 is a control circuit for controlling an adapter, and 96 is an off-talk center device. A memory circuit for storing information necessary for managing the transmitted facsimile information, such as page information and error information, 97
Reference numeral 7 is a detector for power supply and power supply loop during off-talk communication of the facsimile device, 98 is a display device for displaying whether a facsimile signal is normally received or a communication error has occurred,
99 is a buffer amplifier.

Next, the operation of the second embodiment will be described with reference to FIG. Since the embodiment of the present invention is configured as described above, a signal for stopping the function of the main amplifier 55 is transmitted from the off-talk center device so that the facsimile signal is not output from the speaker 8. This is not necessary in the case of simultaneous broadcast, but when transmitting specific information to a specific customer, an ID code is transmitted from the off-talk center device 3 and the preset ID is set in the off-talk home device 5.
When the code matches, the channel is switched to a specific channel (for example, 1 channel) and the signal reception standby state is set. After that, when the facsimile start signal and the ringing no-call signal are received, the adapter sends the signal from the off-talk center device to 93
The control circuit 95 monitors and monitors the modem through the modem No. 2, and the facsimile signal from the off-talk center apparatus is sent to the facsimile apparatus 7 through the switch 92. When the facsimile device 7 receives the silent ringing signal, it transmits the telephone number of the receiving side, the function of the receiving side, and the like by a normal facsimile communication procedure, but as described above, the upstream signal is not used in the off-talk communication. Therefore, in the adapter 9, this upstream signal is cut by the 99 buffer amplifier. The off-talk center apparatus 3 can operate the timer during this period, because the time when the signal is transmitted in the upstream direction can be known by the length of the signal (information amount, for example, the number of bits). In this way, the off-talk center apparatus 3 waits for the time of the upstream signal with the timer and sends only the downstream facsimile signal. On the other hand, since the adapter 9 monitors and monitors the facsimile signal from the off-talk center device, for example, the EOM signal (a signal when the transmission of one page is completed and the next page is present) or the MPS signal (transmission of one page) is performed. Is completed and there is continuous transmission), and EOP signal (the signal when transmission of one page is completed and there is no continuous transmission) is monitored to see if the facsimile signal is being received normally.
Further, it is possible to judge whether or not an abnormality has occurred in the subscriber line 4 or the like. For this reason, it is possible to display on the display 98 whether normal reception or an abnormality has occurred. With this configuration, the facsimile device for the telephone line can be commonly used for both off-talk communication and the telephone line, and since it is not necessary to store all the facsimile information, it can be economically constructed.

During off-talk facsimile communication, it is easy to identify that communication is being performed because the receiving paper is coming out while printing. To interrupt this, for example, by turning off the power of the facsimile device, the adapter can be used. Since it can be detected by the power feeding loop detection circuit 97, it is possible to interrupt or retransmit the off-talk facsimile communication. It has already been described that the off-talk facsimile communication can be interrupted because the telephone call is prioritized if the handset of the telephone is off-hook. Further, when a communication error occurs between the off-talk center device and the adapter, the adapter 9 can also manage the page information of the facsimile signal, so that only the erroneous page is deleted or a warning that there is an error is issued. You can Although the second embodiment has also been described with respect to the modem device, it goes without saying that the off-talk facsimile communication can be configured with a demodulator because there is no upstream information.

FIG. 5 shows a third embodiment of the present invention, in which 1 is a telephone exchange, 11 is an exchange, and 2 is an intra-talk communication intra-station device accommodated in the telephone exchange. Although illustrated as a switch for convenience in the figure, a detection circuit for detecting an incoming signal from the exchange, a voltage detection circuit for detecting telephone use of the subscriber line 4, an amplifier for distributing / amplifying information from the off-talk center device 3, and the like. It has a function. Further, 5 is an off-talk home device, 51 is a switch for switching between use of a telephone line and off-talk communication, 52 is an amplifier for amplifying information from the off-talk center device, and 53 is for detecting transmission of the telephone 6. A subscriber line voltage detector and an incoming signal detector, 54 is a control circuit for identifying an ID signal or the like and controlling an off-talk home device, and 55 is a main amplifier for driving the speaker 8. 6 is a telephone, 7 is a facsimile device, 8 is a speaker used for off-talk communication, and 9 is an adapter for performing off-talk facsimile communication. here,
Reference numeral 92 is a switch for switching whether to use the facsimile machine 7 in a telephone line or in off-talk communication,
Reference numeral 94 is a detection circuit for detecting the voltage of the subscriber line for detecting the outgoing and incoming calls of the telephone, 95 is a control circuit for controlling the adapter, and 97 is a power feeding loop and a power feeding loop for off-talk communication of the facsimile apparatus 7 The detector, 99 is a buffer amplifier.

Next, the operation of the third embodiment will be described with reference to FIG. Since the embodiment of the present invention is configured as described above, a signal for stopping the function of the main amplifier 55 is transmitted from the off-talk center device so that the facsimile signal is not output from the speaker 8. This is not necessary in the case of simultaneous broadcast, but when transmitting specific information to a specific customer, an ID code is transmitted from the off-talk center device 3 and the preset ID is set in the off-talk home device 5.
When the code matches, the channel is switched to a specific channel (for example, 1 channel) and the signal reception standby state is set. After that, when the facsimile start signal and the ringing no-call signal are received, the adapter receives the signal from the off-talk center device 92.
To the facsimile apparatus 7 through the switch. Facsimile device 7 that receives the non-ringing call signal
Transmits the telephone number of the receiving side and the function of the receiving side by a normal facsimile communication procedure. However, as described above, since the upstream signal is not used in the off-talk communication, the adapter 9 transmits this upstream signal to 99. It is cut by the buffer amplifier. The off-talk center apparatus 3 can operate the timer during this period, because the time when the signal is transmitted in the upstream direction can be known by the length of the signal (information amount, for example, the number of bits). In this way, the off-talk center apparatus 3 waits for the time of the upstream signal with the timer and sends only the downstream facsimile signal. Because it is configured like this,
The facsimile device for the telephone line can be used for both off-talk communication and the telephone line, and the memory and the modem device for accumulating the facsimile information are unnecessary, so that it can be economically constructed.

During the off-talk facsimile communication, the receiving paper comes out while being printed, so it can be easily identified that the communication is in progress. To interrupt this, for example, by turning off the power of the facsimile apparatus, the adapter can be used. Since it can be detected by the power feeding loop detection circuit 97, it is possible to interrupt or retransmit the off-talk facsimile communication. It has already been described that the off-talk facsimile communication can be interrupted because the telephone call is prioritized if the handset of the telephone is off-hook.

Due to such a structure, if a general-purpose commercially available telephone line facsimile apparatus is used, not only can it be used for a normal telephone line, but also this adapter can be used. Since it can be used for off-talk facsimile communication by using it, there is an effect that it is economical because one facsimile apparatus can be applied to both communications. Further, in the off-talk facsimile communication, an error can be displayed even in the case of a communication error, and it is possible to send the complete information together with the information of rebroadcasting and retransmission to the facsimile device.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of a communication sequence of the first embodiment.

FIG. 3 is a diagram showing a second embodiment of the present invention.

FIG. 4 is a diagram showing an example of a communication sequence of the second embodiment.

FIG. 5 is a diagram showing a third embodiment of the present invention.

FIG. 6 is a diagram showing an example of a communication sequence according to a third embodiment.

FIG. 7 is a diagram showing a conventional example.

[Clearing of code] 1 is a telephone exchange station 11 is an exchange 2 is an off-talk communication in-office device accommodated in the telephone exchange station 5 is an off-talk home device 51 is a switch 52 for switching between use of a telephone line and off-talk communication Is an amplifier 53 that amplifies information from the off-talk center device. 53 is a voltage of the subscriber line 4 for detecting a response at the time of making or receiving a call or a detector of an incoming signal. 54 is an ID signal or an off-talk home device. The control circuit 55 for controlling the main amplifier 6 for driving the speaker 8 is the telephone 7 is the facsimile device 8 is used for off-talk communication Speaker 9 is the adapter for performing off-talk facsimile communication 91 is for receiving a fax from the off-talk center device The switch 92 for switching when transmitting the stored facsimile information is A switch 93 for switching between using the communication device 7 for a telephone line or for off-talk communication is a modem device for facsimile communication 94 is a detection circuit for detecting the voltage of a subscriber line 95 is for controlling an adapter A control circuit 96 is a memory circuit 97 for accumulating facsimile information sent from the off-talk center device. A circuit 97 is for calling the facsimile device 7 silently, and a circuit 98 for monitoring power supply and power supply as necessary. An indicator 99 for displaying is a buffer amplifier 10 is a conventional facsimile machine dedicated to off-talk communication

Front Page Continuation (72) Inventor Yoshihiro Yamamoto 7-5-25 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nishishinjuku Kimuraya Building 14F NTT Off-Talk Communications Co., Ltd.

Claims (3)

[Claims] 1. A means for demodulating facsimile signals, a memory means for accumulating facsimile signals, a means for identifying information such as off-talk facsimile and voice, a means for detecting a voltage change on a telephone line, and a facsimile for telephone lines. Facsimile signals sent from the off-talk center device are provided with means for silently calling to the device, power feeding / power feeding monitoring means, means for switching between telephone call and off-talk communication, and control means for controlling these operations. Is received and stored in the memory means, and after receiving the information, a silent call is made to the facsimile device, communication is performed by a normal facsimile communication procedure, and a telephone call is made during the off-talk communication. Switch to a telephone call by detecting the voltage of the telephone line and supply it to the facsimile device for the telephone line. And monitoring the operation, off-talk facsimile communication system, characterized in that can be used to also telephone line off-talk communication. 2. A means for demodulating a facsimile signal, a means for detecting a voltage change on a telephone line, a means for monitoring power feeding / power feeding to a telephone line facsimile apparatus, and means for switching between telephone call and off-talk communication. And a memory means for accumulating page information of a facsimile signal, a means for displaying a reception state, and a control means for controlling these operations. The facsimile signal sent from the off-talk center device is a facsimile for a telephone line. While transmitting to the device, by accumulating and managing the received page information by receiving and demodulating the signal at the same time, displaying the reception state,
An off-talk facsimile communication method characterized by switching between off-talk communication and telephone call by detecting a voltage change on the telephone line. 3. A means for detecting a change in voltage of a telephone line, a means for feeding / supplying power to a facsimile apparatus for telephone lines,
It is equipped with means for switching between telephone call and off-talk communication and control means for controlling these operations. The facsimile signal sent from the off-talk center device is transmitted to the telephone line facsimile device and the telephone line voltage An off-talk facsimile communication method characterized by switching between off-talk communication and telephone call by detecting a change.