JPH0334750A - Telephone exchange terminal control system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] Concerning a terminal control system of a telephone exchange, a simple configuration enables alternate calls between a special terminal with a built-in amplifier, a backsliding exchange a terminal, and the special terminal. The purpose is to provide a terminal control method for the switching section, and a terminal interface to which a special terminal with a built-in amplifier is connected is connected to the switching section, and the terminal interface is activated by a call from a telephone terminal or a call from the special terminal. The special terminal is equipped with a switching means for controlling the call direction by the identification output of the push button dial identification means, and after the connection path between the telephone terminal and the special terminal is formed, the telephone terminal The communication direction of the special terminal is switched by a push-button dial signal sent from the special terminal.

[Industrial application field] The present invention relates to a terminal control system for a telephone exchange.

In general, telephone calls using telephone exchanges (including key telephones and PBXs) are made using a full-duplex system with simultaneous transmission and reception, and are configured so that there is no need to control the direction of the call. However, devices that need to control the direction of calls, such as radios that need to switch between sending and receiving, cannot be used with 219
There was a desire to use this terminal as a terminal to communicate with terminals in other exchanges.

[Prior art] Conventionally, in order to achieve full-duplex communication using a two-wire communication line, a sidetone prevention circuit and a noise prevention circuit (hybrid circuit) for the relay amplifier circuit were installed at the subscriber line termination point. ing.

On the other hand, simultaneous two-wire transmission and reception is also possible with terminals with built-in amplifiers (separated transmitting and receiving circuits), such as intercoms as special terminals of exchanges, hands-free telephone terminals, loudspeaker answering devices, and wireless terminals. In order to do this, a circuit to prevent wraparound is purposely installed to allow full-duplex (bidirectional) communication.

[Question 8 to be solved by the invention] As mentioned above, in the conventional system, in order to connect a special terminal with a built-in amplifier to a telephone exchange and make a call, it is necessary to add devices such as a loop prevention circuit. However, there was a problem that it was expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a terminal control system for an exchange that enables alternating calls between a special terminal with a built-in amplifier and an ordinary exchange terminal using a simple configuration.

[Means to solve problems] FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 10 is a telephone terminal, 11 is a switching section, and I2
121 is a push-button dial identification means, 13 is a special terminal with a built-in amplifier, 131 is a call originating/receiving means, and 132 is a switching means.

The terminal interface 12 can be configured as a trunk connected to the exchange I1 or as an adapter in front of a special terminal.

The present invention directly connects the terminal interface and the special terminal, and when the special terminal and the telephone terminal housed in the exchange section are connected, the transmission/reception is switched by transmitting a push button dial signal from the telephone terminal. When a request is made, a push-button dial identifying means provided in the terminal interface detects the request and switches between sending and receiving the special terminal.

[Operation] When making a call from the telephone terminal 10, the terminal interface 1
When the special number specifying 2 is dialed, the terminal interface 12 is prompted to titf under the control of the exchange section 11, and thereby the special terminal 13 directly connected to the terminal interface 12 is activated.

Normally, the special terminal 13 has a receiving section connected to the terminal interface 1.
2, but when activated from the terminal interface 12, it switches to the transmitter side.

In this state, when it becomes possible to make a call and the telephone terminal 10 transmits voice, the voice is output from the transmitting section of the special terminal.

If you want to receive voice from the other party on the telephone terminal 10 side, press the push button 10 to send a predetermined specific dial signal for switching to reception. This is identified by dial identification means 121. An output corresponding to the va-separated result is output to the special terminal 13 as a switching control signal,
In response to this, the switching means 132 in the special terminal 13 switches the call direction to the receiving state (switching to the receiving section side). If it is desired to switch from this state to a transmitting state, another push-button dialing signal is sent from the telephone terminal IO. When the push-button dial identifying means 121 of the terminal interface 12 detects this, the drive (call direction) of the transmitting/receiving section of the special terminal 13 is switched to a state in which the receiving section operates.

Next, to explain the operation when activated from the special terminal 13 side, when an input such as a voice is received on the receiving side of the special terminal 13, this is detected by the calling/receiving means 131 and connected to the terminal interface 12. The telephone line connected to the station is set as calling signal I (closing the DC loop).

As a result, the exchange unit 1 via the terminal interface 12
1, it is detected that a call has occurred. Exchange part 1
1 calls a predetermined telephone terminal 10 when this terminal interface 12 makes a call; in this case, multiple telephone terminals including the telephone terminal 10 are notified of the incoming call. You can also do that. When the called telephone terminal 10 answers, the telephone terminal IO and the special terminal 13
Exchange part 11. Connection is made via the terminal ink face I2, and at the same time the push button dial identification means 121 of the terminal interface 12 is activated.

In this case, the voice from the special terminal 13 that was initially in the reception state is sent to the telephone terminal 10, and if you want to send a voice from the telephone terminal 10 after that, send a specific push button dial signal as above, and send the voice to the special terminal 13. Switch the sending/receiving status. Thereafter, the switching of the call direction of the special terminal 13 can be controlled from the telephone terminal 10 in the same manner as when the call is made from the telephone terminal IO described above.

〔Example〕

FIG. 2 is a block diagram of a first embodiment of the present invention, FIG. 3 is a block diagram of a second embodiment of the present invention, FIGS. 4 and 5 are operational sequences of the embodiment, and FIG. FIG. 5 is an operation sequence diagram when a telephone terminal makes a call. FIG. 5 is an operation sequence diagram when a special terminal does not make a call.

In FIG. 2, 20 is a general telephone terminal, 21 is an exchange, 22 is a subscriber circuit (indicated by LC), 23 is a network, 24 is a special trunk (indicated by SPT) corresponding to the terminal interface in FIG. 25 represents a special terminal with a built-in amplifier.

The exchange 21 includes a central control unit (indicated by CC) 231. which is connected to the network 23. Memory (displayed as MM) 23
2. Exchange control is performed by an input/output device (indicated by Ilo) 233, etc., and such an exchange is provided as a key telephone device or a private telephone exchange.

The special transformer 24 to which the special terminal 25 is connected is provided with a codec (CODEC) 241 that performs digital-to-analog conversion and analog-to-digital conversion. In the case of an analog exchange, a hybrid circuit is provided instead of a codec and connected to the special terminal 25 by different lines for transmission and reception (4 lines in total or 3 lines using a common ground line).

The special trunk 24 further includes a PB signal receiver (push button dial signal reception 2S) 243 (indicated by PBR),
A control signal output circuit 242 (indicated by CONT) is provided which operates upon detection of the specific signal.

FIG. 4 shows the operation of the first embodiment shown in FIG.

This will be explained with reference to FIG.

First, to explain the case where a telephone terminal makes a call using FIG. 4, when the telephone terminal 20 makes a call and dials a special number to capture a special terminal, the controller of the
It is connected to the special trunk 24 under the control of CC231, MM232, etc.).

Then, this special trunk 24 is activated, and at the same time a special terminal with a built-in amplifier (for example, a public address call answering device)
An electrical connection is made with the Assuming that the F&First special terminal is in the receiving mode, once it becomes possible to send a call from the telephone terminal 20 to the special terminal 25, and after the telephone terminal 20 is in a talking state like this, If you want to hear a call from someone (or send a call from the special terminal 25), send the dial "#" from the telephone terminal 20. When this is detected by the PBR 243 of the special trunk, the detection output of "#" is inputted to the control signal output circuit 242. The control signal output circuit 242 restores the relay RL 244 by a signal corresponding to "#" (assuming that it was operating before that), and then the transmission/reception tx w, i circuit 251 of the special terminal 25 is restored. and enters reception mode, special terminal 25
The receiving section (not shown) in the transmitter is driven, and the transmitting section stops operating.

■If you want to send a call from the telephone terminal 20 to the special terminal 25,
A push button dial signal of '*'' (asterisk) is sent out. When this is detected by the PBR 243 of the special trunk 24, the corresponding output is supplied to the tlj1m signal output circuit 242, which drives the relay RL 244 and closes its relay contact. rI!, is brought into the closed (meter) state. Then,
The state of the transmission/reception switching circuit 251 of the special terminal 25 is switched, and the special terminal 25 enters the transmission mode, and the special terminal 25 receives the transmission signal from the telephone terminal 20 .

Next, using FIG. 5, the operation sequence when making a call from a special terminal will be explained.

When making a call from a special terminal, when voice etc. is input, the signal is detected and the call is made to the exchange (closing a DC loop).In contrast, at the exchange, a special trunk detects the incoming call (conventionally (using the same technology as the central office line trunk system of PBX etc.), then at the exchange,
When there is an incoming call to the special trunk 24, the CC 231 is notified.

Then, a specific terminal 20 that has been determined in advance to receive reception is called under the control of the CC 231 or the like.

When the terminal 20 responds, a connection path with the special terminal 25 is formed, and the PBR 243 of the special trunk 24 and the terminal 20 are connected.

After a call has been sent from the special terminal 25 (it is assumed that the call is in the send mode when making a call from the special terminal), if the user of the telephone terminal 20 wishes to send a call, press the °* button dial signal. Then, the PBR 243 detects this and controls the control signal output circuit 342 to drive the relay RL 244 and close its contact "L", as in the case of FIG. to switch the transmission/reception switching circuit 251 of the special terminal 25 to the reception mode.After this, to put the special terminal 25 into the transmission mode, send a "#" push button dial signal from the telephone terminal 20, and relay RL2
This is executed by restoring 44.

Next, the configuration of the second embodiment shown in FIG. 3 will be explained.

In Fig. 3, 30 is a general telephone, 31 is a private branch exchange (represented by PBX), 32 is an exchange additional device (represented by ADP), and 321 is a ring signal generator (represented by O3C).
, 322 is a power supply/loop monitoring circuit (indicated by BS), 32
3 is r'B receiver (Press i0 dial signal receiver: PB
324 is a control j'n signal output circuit (CONT
), 325 is a hybrid circuit (2tffl-4
line conversion circuit 2]]YB), 33 is a wireless base station, 3
4 represents a wireless mobile station.

In this embodiment, a radio base station 33 that communicates with a radio mobile station 34 by a direct line is connected to an exchange add-on device 32. That is, the microphone, speaker, and breathtalk circuit of the non-VAA base station 33 are connected to the switch add-on device 32 as shown in the figure, and the switch add-on device T1.32 is connected to the office line trunk 311 of the PBX 31.

To explain the operation, first, (1) the case where the telephone 30 calls the wireless mobile station 34, and then (2) the case where the wireless mobile station 34 calls the telephone 30 will be explained.

■When calling a wireless mobile station from a telephone, dial from the telephone 30 to capture the office line trunk 311 that accommodates the additional switch 32, dial "#", and then enter the call sign of the wireless mobile station 34. Input by voice.

Then, the office line trunk 311 of I'BX31, the exchange additional equipment! The wireless base station 33 is connected via t32, and “
#” signal is detected by the PBR 323 in the switch additional device 32, and the relay RL is put into the recovery state based on the control signal output amount 1324. When the relay RL is in the recovery state, the contact re is in the open state and dusted, which causes the wireless base station 33, a breathtalk switch (not shown) is switched to the receiving side, and the voice of the call sign transmitted from the telephone 30 is transmitted wirelessly from the radio base station 33.

After transmitting the above call sign, when the "*" button is pressed manually from the telephone 30, the PBR 323 detects this and an output signal is generated from the control signal output circuit 324, and the call signal mask circuit in the hybrid circuit 325 ( (not shown)
and drives relay RL. When relay RL operates, its contact rl closes and the breath of non-VA base station 33)
- controls the remote circuit and switches to transmit mode. The receiving side of hybrid circuit 325 is masked.

As a result, when a response voice is received from the wireless mobile station 34 via the antenna (indicated by ANT) of the wireless base station 33, the voice is transmitted from the hybrid circuit 325 to the telephone 30 via the PBX 31. After this, the call direction is controlled by human power of the push i11 signals U#゛° and °゛ on the telephone [30].

■When calling a telephone from a wireless mobile station, the wireless mobile station 34
When oscillation is performed using a push button signal to the wireless base station 33, the signal is input from the antenna of the wireless base station 33, and the signal is input to the wireless base station 33. It is received by the PBR 323 from the speaker of the wireless device (in the receiving state) via the hybrid circuit 325 of the AC IAi addition circuit 32. This reception result is analyzed by the control signal output circuit 324, and if the reception is normal, relay RG is activated. As a result, contact rg is switched and 03C321 is connected to central office line trunk 311.
A ringing signal (ringer) is sent from the terminal.

On the other hand, in the PBX 31, when a general telephone [30 (or a telephone corresponding to a conventional switchboard)] is answered (off-hook) in the same way as a normal incoming call to a central office line trunk, the AC IA additional device 32 receives power. The loop monitoring circuit 322 detects a response and stops sending out the ringer, making it possible to make a call.

After this, the control of the breathtalk circuit of the wireless base station is switched by transmitting push button signals "#" and "*" from the telephone 30, as in the case of the first embodiment described above.

In each of the above embodiments, the example of a loudspeaker answering device, a wireless base station, etc. is described as a terminal including an amplifier, but it is not applicable to devices such as a personal wireless device or an MCA (multi-channel access) system. Needless to say.

[Effects of the Invention] According to the present invention, it is possible to easily control alternate calls by simply adding some functions to the equipment on the exchange side, without changing the configuration of a conventional terminal device with a built-in amplifier. Since this can be realized, it is possible to accommodate a terminal that operates alternately in sending and receiving operations in a switchboard and to make calls to a regular telephone.

[Brief explanation of drawings]

Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is a block diagram of a first embodiment of the present invention, Fig. 3 is a block diagram of a second embodiment of the present invention, and Fig. 4 is a block diagram of a second embodiment of the present invention.
FIG. 5 shows the operation sequence of the embodiment, FIG. 4 is an operation sequence diagram for the telephone terminal not making a call, and FIG. 5 is an operation sequence diagram for the special terminal not making a call. In Fig. 1, IO=Telephone terminal 11: Interchange 1 Kuwa section 12: Terminal interface 121: Push button dial identification means 13: Special terminal 131: Call originating/receiving means 132: Switching means

Claims (1)

[Claims] In a terminal control system for a telephone exchange, a terminal interface (12) to which a special terminal (13) with a built-in amplifier is connected is connected to an exchange section (11), and the terminal interface (12) is a telephone terminal. The special terminal (13) is equipped with a push-button dial identification means (121) that is activated by a call from or a call from the special terminal, and the special terminal (13)
) switching means (
132), wherein after a connection path between a telephone terminal and a special terminal is formed, a call direction of the special terminal is switched by a push-button dial signal sent from the telephone terminal.