JPS637066B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a facsimile/telephone switching system for performing facsimile communication using facsimile terminals used in fixed telephones as they are in mobile communications.

Technical Background For example, current coastal marine telephones use facsimile signals (G2 aircraft use group command signals (2100Hz), reception readiness confirmation signals (1650Hz), etc., and G3 aircraft use continuous “1” control signals (1650Hz)). The disconnection signal (2100Hz) and end-of-call signal (1650Hz) of the ship's telephone match.

Prior Art and Problems In conventional coastal marine telephones, the facsimile signal and reception ready confirmation signal match the disconnection signal and end signal of the marine telephone, respectively, so the line is disconnected during facsimile communication, and facsimile communication is interrupted. The drawback was that it was not possible.

Purpose of the Invention In order to solve this drawback, the present invention aims to stop the monitoring of mobile communication control signals by the mobile terminal and the exchange during facsimile communication, and without modifying the facsimile terminal used in the general telephone network. This will be described in detail below with reference to the drawings.

Embodiment of the Invention FIG. 1 shows an embodiment of the present invention, in which 1 is a telephone, 2 is a facsimile terminal, 3 is an additional device, 4 is a tone signal transmitter, 5 is a tone signal receiver, 6 is a switch, 7 is a mobile device, 8 is a tone signal receiver,
9 is a switch, 10 is a radio base station, 11 is a marine telephone exchange, 12 is a tone signal receiver, 13 is a central control unit, 14 is a switch, 15 is a tone signal receiver, 16 is a tone signal transmitter, 17 is a subscription 18 is a facsimile terminal, and 19 is a telephone. Although the present invention can be applied to various types of mobile communications, the explanation will be given here by taking a coastal marine vessel telephone as an example. When a mobile subscriber dials the telephone number of a fixed subscriber from telephone 1, using existing technology, mobile terminal 7, radio base station 10, marine telephone exchange 11,
It is connected to a telephone set 19 via a subscriber line exchange 17 to make a call. When starting facsimile communication, the additional device 3 detects the start of facsimile communication, opens the switch 9 of the mobile device 7, and disconnects the tone signal receiver 8 that receives the disconnection signal. Thereafter, when the tone signal transmitter 4 sends out a facsimile communication start request signal, it is received by the tone signal receiver 12 of the marine telephone exchange 11 via the mobile device 7 and the wireless base station 10, and the central controller 13 In order to disconnect the tone signal receiver 15 for receiving the telephone call end signal, the switch 14 is opened and the tone signal transmitter 16 sends a confirmation signal to the moving side. Confirmation signal is added to device 3
When the tone signal receiver 5 receives the tone signal, the additional device 3 switches the switch 6 to transmit the tone signal to the facsimile terminal 2.
Connect to. Thereafter, facsimile communication is performed between the facsimile terminal 2 and the telephone 19. When the facsimile communication ends, the additional device 3 detects the end, closes the switch 9 of the mobile device 7, connects the tone signal receiver 8, and then sends out a facsimile communication end signal from the tone signal transmitter 4.
The tone signal receiver 12 of the marine telephone exchange 11 receives the signal via the mobile device 7 and the radio base station 10 . Upon receiving the facsimile communication end signal, the central controller 13 closes the switch 14, connects the tone signal receiver 15, and sends out a confirmation signal from the tone signal transmitter 16. When the confirmation signal is received by the tone signal receiver 5 of the additional device 3, the additional device 3 switches the switch 6 to connect with the telephone set 1, and returns to the talking state. The rest is the same as a normal ship phone.
There are two methods for the additional device 3 to detect the start of facsimile communication: a method in which the additional device detects the pressing of the mode switching button provided on the additional device 3, and a method in which the additional device detects the pressing of the communication button on the facsimile terminal. be. Note that the former method requires pressing both the mode switching button on the additional device and the communication button on the facsimile terminal. The latter method will be explained in detail below.

FIG. 2 shows a telephone and a mobile device of a marine telephone, where 21 is a telephone and 22 is a mobile device. There are four communication lines 23 between the telephone 21 and the mobile device 22, and in addition to the communication lines 23, there is an information line 24 that indicates the on-hook or off-hook state of the telephone 21. Figure 3 shows the connection configuration of facsimile terminals used in the general telephone network.
1 is a facsimile terminal, 32 is a facsimile part,
33 is a switch, 34 is a telephone, and 35 is a subscriber line exchange. The switch 33 is normally in the lower position, and the telephone 34 is connected to the subscriber line exchange 35. When a subscriber takes telephone 34 off-hook and dials, the subscriber is connected to the other party's telephone via local exchange 35 using existing technology.
When performing facsimile communication, when the communication button of the facsimile terminal 31 is pressed, the switch 33 of the facsimile terminal 31 is switched to the upper side, and the facsimile terminal 31 is connected to the facsimile section 32, and the telephone 34 is disconnected. When the facsimile communication is finished, switch 3
3 is switched to the lower side, and the telephone 34 is connected. FIG. 4 shows an embodiment of additional equipment, in which 41 is a telephone, 42 is a facsimile terminal, 43 is an additional equipment, 44 and 45 are switches, 46 is a hybrid circuit, 47 is a loop detector, and 48 is a control section. , 49
50 is a tone signal transmitter, 50 is a tone signal receiver,
51 is a mobile device, 52 is a transmitter, 53 is a receiver, 5
4 is a tone signal receiver, 55 is a switch, 411
is the telephone line, 412 is the information line, 413 is the telephone side,
414 is the central office line side. Hereinafter, the operation of the additional device 43 will be explained in detail using FIG. 4. At the start of facsimile communication, when the mobile subscriber presses the communication button on the facsimile terminal 42, the facsimile terminal 42 switches from the telephone side 413 to the central office line side, in this embodiment the facsimile side 414, as shown in FIG. Due to switching, the loop is broken on the telephone side 413, the loop detector 47 detects the loop break, identifies that it is time to start facsimile communication, and notifies the control unit 48 of a loop break signal. When the control unit 48 receives the loop break signal, the control unit 48 controls the mobile device 5.
Sends a function stop instruction signal for receiving a disconnection signal to 1,
The switch 55 is opened and the function of the tone signal receiver 54 for receiving the disconnection signal is stopped. At the same time, the control unit 48 opens the switch 44,
The information line 412 indicating the on-hook or off-hook state of the telephone 41 is disconnected. (If a mobile subscriber goes on-hook when starting facsimile communication,
If on-hook information is sent to the mobile device 51, the call will be terminated, so in order to prevent this, the control unit 48 also controls the tone signal transmitter 49 to send a facsimile signal to the ship's telephone exchange. Sends a communication start request signal. When the tone signal receiver 50 receives a confirmation signal from the ship's telephone exchange,
The control unit 48 switches the switch 45 to connect the facsimile terminal 42 and the mobile device 51 to the hybrid circuit 46.
connection and facsimile communication begins. When the facsimile communication ends, the switch (corresponding to 33 in FIG. 3) of the facsimile terminal 42 switches from the facsimile side to the telephone side, so that the telephone side enters a loop state, and the loop detector 47 detects the loop. The control unit 48 detects the loop by the loop detector 47, identifies that it is the end of the facsimile communication, and sends the tone signal receiver 5 to the mobile device 51.
When the connection instruction signal No. 4 is sent out, the switch 55 closes and the tone signal receiver 54 becomes connected to the office line. At the same time, the control unit 48 controls the tone signal transmitter 4
9, the tone signal transmitter 49 sends a facsimile communication termination signal to the ship's telephone exchange. When the tone signal receiver 50 receives a confirmation signal from the ship's telephone exchange, the control section 48 switches the switches 44 and 45 to connect the mobile device 51 and the telephone 41, and establish a conversation state. Note that when the telephone 41 and the mobile device 51 are connected, the telephone 4
If 1 is in an on-hook state, the call is terminated without being made.

Although the present invention can be applied to mobile communications without modifying facsimile terminals,
Directly pull out the 4-wire part inside the facsimile terminal,
Even when modifying a facsimile terminal so that it is connected to the switch 45 in Fig. 4 without going through the hybrid circuit of the additional device, short-circuit the central office line side of the facsimile terminal and use the same method as shown in Fig. 4. This can be realized by identifying the start and end of facsimile communication using loop detection on the telephone side.

FIGS. 5a and 5b show a flowchart of the operation of the additional equipment, and FIG. 6 shows a flowchart of the operation of the marine telephone exchange.

Effects of the Invention As explained above, during facsimile communication, both the mobile device and the exchange stop monitoring the control signals of the mobile communication. It has the advantage that facsimile communication can be carried out even if some of the signals match. Furthermore, by installing additional equipment, facsimile terminals used in general telephone networks can be used as they are. Furthermore, just like normal facsimile communication, facsimile communication can be performed by simply pressing the communication button on the facsimile terminal, and if the subscriber turns on the phone during facsimile communication, the facsimile communication is terminated immediately without making a call. The advantage is that if you are able to talk to someone and are off-hook, you can make the call again.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows a connection state between a marine telephone and a mobile device, Fig. 3 shows a connection configuration of a facsimile terminal, Fig. 4 shows an example of an additional device, and Fig. 5 a , b is a flowchart of the operation of the additional equipment, and FIG. 6 is a flowchart of the operation of the marine telephone exchange. DESCRIPTION OF SYMBOLS 1...Telephone, 2...Facsimile terminal, 3...Additional device, 4...Tone signal transmitter, 5...Tone signal receiver, 6...Switch, 7...Mobile device, 8...Tone signal receiver, 9...Switch, 10... Wireless base station, 1
1... Marine telephone exchange, 12... Tone signal receiver,
13... Central control device, 14... Switch, 15... Tone signal receiver, 16... Tone signal transmitter, 17
... Subscriber line exchange, 18 ... Facsimile terminal, 1
9...Telephone, 21...Telephone, 22...Mobile device, 23
...Telephone line, 24...Information line, 31...Facsimile terminal, 32...Facsimile section, 33...Switch, 3
4...Telephone, 35...Local line exchange, 41...Telephone, 42...Facsimile terminal, 43...Additional device,
44, 45...Switch, 46...Hybrid, 4
7... Loop detector, 48... Control unit, 49... Tone signal transmitter, 411... Communication line, 412... Information line,
413... Telephone side, 414... Office line side, 50... Tone signal receiver, 51... Mobile device, 52... Transmitter, 5
3...Receiver, 54...Tone signal receiver, 55...Switch.

Claims (1)

[Scope of Claims] 1. In mobile communication, between a mobile phone and a mobile device, means for identifying the start and end of the mobile side facsimile communication, means for switching between the mobile phone and the facsimile terminal and connecting to the mobile device; It is equipped with an additional device having means for sending facsimile communication start/end signals and means for receiving facsimile communication start/end confirmation signals from the mobile terminal, and is fixed to the mobile side facsimile terminal using the facsimile terminal used in the general telephone network. When performing facsimile communication between side facsimile terminals, the additional device transmits a function stop instruction signal of the disconnection signal receiver of the mobile device to the mobile device at the start of the facsimile communication, and then sends a function stop instruction signal to the mobile device via the mobile device to the switching center. After receiving the facsimile communication start request signal, the exchange of the exchange stops the function of the call termination signal receiver of the exchange, and sends a facsimile communication start confirmation signal to the additional device. and the additional device releases the connection between the mobile side telephone and the mobile device after receiving the facsimile communication start confirmation signal, and connects the mobile side facsimile terminal and the mobile device to perform facsimile communication.・Telephone switching method. 2. The mobile side facsimile communication start/end identification means of the additional device connects the 2nd line side to the office line side of the mobile side facsimile terminal, and connects the 4th line side to the communication line of the mobile device via a switch. a hybrid circuit, and a loop detector that is connected to the telephone side of the mobile facsimile terminal, detects a break in the two-wire side loop of the hybrid circuit when facsimile communication starts, and detects the two-wire side loop when facsimile communication ends. A facsimile/telephone switching system according to claim 1, characterized in that: