JP3305619B2 - Hotline connection system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot line connection system, and more particularly, to a technique for hot line connecting terminals connected to a private branch exchange (PBX).

[0002]

2. Description of the Related Art Conventionally, a communication system for hot-line connection between terminals has been devised. FIG. 3 is a diagram showing a configuration of such a conventional hot line connection system. As shown in the figure, the conventional hot line connection system includes a hot line setting / cancellation station on the left side for setting / cancelling a hot line mode (also referred to as “direct communication mode”) and the hot line setting / cancellation. The hotline mode is set / released by the station.
And a station to be released. The hotline setting / cancellation office includes a telephone 1, an exchange 2, and a modem 3. On the other hand, the hotline set / released stations include a telephone 4, a line connection device 5, an exchange 9, and a modem 10, and the line connection device 5 further includes a modem switch 6
, A telephone-side switch 7, and a repeater unit 8.

Here, in the hotline setting / cancellation station, the telephone 1 and the exchange 2 are connected by a 2WLC (2-wire) system, and the exchange 2 and the modem 3 are connected by 6WOD (6-wire).
They are connected by a system. Similarly, at the hotline set / released station, the telephone 4 and the exchange 9 are 2WL
C is connected, and the exchange 9 and the modem 10 have 6W
They are connected by the OD method. The modem 3 and the modem 10 are connected to each other via a satellite line.

The modem-side switch 6 and the telephone-side switch 7 are used to connect the modem 10 and the telephone 4 via the exchange 9 and to connect them via the repeater unit 8. Is a manual switch for switching between the two. When the modem-side switch 6 and the telephone-side switch 7 are set so that the modem 10 and the telephone 4 are connected via the repeater unit 8, the repeater unit 8 first Performs 4-wire to 2-wire conversion. Further, the repeater unit 8 detects the state of the control line (SR line) at the time of an incoming call and rings the bell of the telephone 4 and, at the time of outgoing call, transmits the dial number from the telephone 4 to the SS line of the modem 10 (6 WOD side) Connect to

The modem 3 and the modem 10 have two operation modes, an individual mode and a direct communication mode, and these modes can be switched by an external switching control signal. Then, in the individual mode, the output is performed by the normal OD method, and the extension number is transmitted to the exchange 9 at the time of an incoming call. On the other hand, in the direct communication mode, the extension number is not transmitted at the time of an incoming call, and the SR line of the line connection device 5 is turned on.

In the hot line connection system having such a configuration, when the telephone 1 is called from the telephone 1 through an individual line, the operator connects the modem side switch 6 in advance in the line connection device 5 of the hot line set / canceled station. In addition, it is necessary to set the telephone switch 7 on the exchange 9 side. When a selection signal (dial signal) is transmitted from the telephone 1, the signal is transmitted to the exchange 2
Identified and transmitted to the modem 3. The modem 3 transmits the signal content to the modem 10 via the satellite line, and further transmits the modem 1
0 indicates the content of the same signal by the line connection device
Transmit to At this time, in the line connection device 5, since the modem-side switch 6 and the telephone-side switch 7 are respectively set on the exchange 9, the signal input from the modem 10 is transmitted to the exchange 9 as it is. Then, the exchange 9 performs a process such as the determination of the extension number, and connects to the telephone 4.

In the above hot line connection system, the following procedure is required when the telephone 1 and the telephone 4 are hot line connected. That is, first, the operator of the hotline setting / cancellation station operates a switch on a control stand (not shown), a console operation on the exchange 2, and the like.
It is necessary to perform the function setting of the exchange 2 so that the telephone 1 and the modem 3 are connected one-to-one. On the other hand, the operator of the hotline set / released station sets the modem-side switch 6 and the telephone-side switch 7 of the line connection device 5 to the repeater unit 8 so that the modem 10 and the telephone 4 are connected one-to-one. Must be set manually. After taking these steps, when the telephone 1 dials the hot line setting special number, the controller of the earth station (not shown) sends a switching control signal to set the modem 3 and the modem 10 to the direct communication mode. As a result, hot line connection is made through the path of the telephone 1, the exchange 2, the modem 3, the satellite line, the modem 10, the line connection device 5 (repeater section 8), and the telephone 4. After this, telephone 1
Or, simply by off-hooking the telephone 4, the other telephone is called, and a hotline call becomes possible.

In order to release the hot line connection, when a special number for releasing the hot line is dialed on the telephone 1, the control device of the earth station (not shown) transmits a switching control signal to separate the modem 3 and the modem 10 individually. Reset the mode. Further, the operator of the hotline setting / cancellation station operates the telephone 1 and the modem 3 by operating a switch at a control stand (not shown) or a console at the exchange 2.
The function of the exchange 2 is set so that the modem 10 and the telephone set 4 are connected one-to-one. By manually setting the modem-side switch 6 and the telephone-side switch 7 to the repeater unit 8 side, the hot line connection is released.

[0009]

However, in such a conventional hot line connection system, when setting or canceling a hot line connection, a hot line setting / cancellation station and a hot line setting / cancellation station have their respective functions. Since the operator must perform a predetermined setting or canceling operation, there is a problem that if the operation is neglected, connection in a mode desired by the user cannot be performed.

In order to set or cancel the hot line connection, it is necessary to dial a special number and switch the mode of the modem 3 and the modem 10 by a control device of an earth station (not shown). , A hotline setting special number, and a hotline canceling special number must be used, which complicates the operation of the system.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a hot line connection system which can eliminate the need for dialing a special number and switching operations by an operator when setting or canceling a hot line. Is to provide.

[0012]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, the present invention provides an originating private branch exchange provided at a transmitting terminal, a receiving private exchange provided at a receiving terminal, and the originating private exchange. A hot line connection system comprising: a calling line connection device connected between a private branch exchange and a calling terminal; and a called line connection device connected between the called private branch exchange and a called terminal. The calling line connection device, if the extension number input from the calling terminal is a direct mode setting number, the calling side direct mode setting means for setting the calling line connection device to the direct mode, and a call signal Originating side direct mode release means for releasing the direct mode when the direct mode release number is included,
The receiving-side line connection device includes: a receiving-side direct communication mode setting unit configured to set the receiving-side line connection device to the direct communication mode when the extension number received from the calling terminal is a direct communication mode setting number; And a receiving side direct mode canceling means for canceling the direct mode when a mode canceling number is detected.

[0013]

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram showing an overall configuration of a hot line connection system according to the present embodiment. As shown in the figure, the hot line connection system sets / cancels the hot line mode and sets / releases the hot line on the left side of the figure.
The hot line setting / cancellation station sets / cancels the hot line mode by the hot line setting / cancellation station. Then, at the hotline setting / cancellation station, the telephone 11a, the line connection device 12a, the exchange 13a, and the modem 14a are connected in this order. On the other hand, at the hotline set / released station, the modem 14b, the exchange 13b, the line connection device 12
b and telephone 11b are connected in this order. It should be noted that two extension numbers are assigned to the line connection device 12b of the hotline set / release station in the exchange 13b. In the following, it is assumed that an extension number “FG” and an extension number “FH” are assigned as an example.

Here, in the hotline setting / release station and the hotline set / released station, the line connection device 1
2a, 12b and exchanges 13a, 13b are each 6 WO
D system, and the exchanges 13a, 1
3b and the modems 14a and 14b are also connected by the 6 WOD method. Then, the modem 14a and the modem 1
4b is connected to each other via a satellite line.

In the hot line connection system having the above configuration, the telephones 11a and 11b, the line connection devices 12a and 12b, the exchanges 13a and 13b, and the modems 14a and 14b have the same configuration. Except for the connection devices 12a and 12b, the configuration is the same as the conventional one. Therefore, the description thereof is omitted here, and the line connection devices 12a, 12
The configuration of b will be described in detail.

FIG. 2 is a diagram showing the internal configuration of the line connection device 12 (12a, 12b) provided in the hot line connection system. Hereinafter, as shown in the figure, the line connection device 12 includes a DTMF transmission circuit 21, a DTMF detection circuit 22, a dial detection circuit 23, a repeater unit 24, a control unit 25, a PB detection circuit 26, and a distribution unit 27. It is configured.

The DTMF transmission circuit 21 is a circuit for transmitting and receiving a selection signal by a multi-frequency signal system. Also, the repeater unit 24
When an off-hook signal is input from the device, a selection signal to that effect is sent to the other party using the 4WS line.

The PB detection circuit 26 monitors whether or not a direct communication mode setting number (“FG” in the case of the line connection device 12 a) is input from the telephone 11, and if it is input, a signal to that effect is sent to the control unit 25. Send out.

The DTMF detection circuit 22 is a circuit for detecting a selection signal transmitted from the other party using the 4WR line. When detecting the incoming call signal, the DTMF detection circuit 22 sends a signal to the repeater section 24 to that effect. Further, when a release signal (hereinafter referred to as “**”) is detected in a call signal transmitted from the other party, the control unit 25 releases the line connection device 12 from the direct communication mode and resets the line connection device 12 to the individual mode. To instruct.

The extension numbers "FG" and "FH" are SR
The signal is input to the line connection device 12 via a line, distributed by the distribution unit 27 and input to the dial detection circuit 23. Then, the dial detection circuit 23 recognizes the extension number “FG” as the individual mode setting number, and instructs the control unit 25 to set the line connection device 12 to the individual mode. Further, the control unit 25 recognizes the extension number “FH” as the direct communication mode setting number and instructs the control unit 25 to set the line connection device to the direct communication mode.

The control unit 25 includes a PB detection circuit 26, a DTM
When instructions are received from the F detection circuit 22 and the dial detection circuit 23 for setting the individual mode, setting the direct communication mode, and canceling the direct communication mode, the switches 28-1 and 28 are operated according to the instructions.
2-2 and 28-3 are switched to set the line connection device 12 to the direct communication mode or the individual mode.

That is, when the control unit 25 receives an instruction to set an individual mode from the dial detection circuit 23, the control unit 25 sets the switches 28-1 and 28-2 to the bypasses 30-1 and 30-3, respectively.
0-2 side, and switch 28-3
The output is switched so that the output of the S line becomes valid. Further, when an instruction to set an individual mode is received from the PB detection circuit 26, the switches 28-1 and 28-2 are respectively set to the bypass 30-.
1, 30-2 and switch 28-
3 is switched so that the output of the SS line becomes valid. On the other hand, when a direct mode setting instruction is received from the PB detection circuit 26, the switch 28-1 is switched to the DTMF transmission circuit 21, the switch 28-2 is switched to the DTMF detection circuit 22, and the switch 28-3 is grounded. Switch to the 31 side.

Next, the operation of the hot line connection system will be described.

First, the case where the telephone 11a is called from the telephone 11a as an individual telephone will be described. In this case, the user dials a telephone number including the extension "FG" on the telephone 11a. Upon detecting the first digit "F" of the extension number "FG", the exchange 13b of the hotline set / released station determines that the connection is to the line connection device 12b, and connects to the SR line of the line connection device 12b. The extension number "FG" is transmitted.

Dial detection circuit 2 of line connection device 12b
3 receives the extension number “FG”, determines that the call is an individual call, and sends an individual setting signal to the control unit 25. Upon receiving this signal, the control unit 25 connects the switches 28-1, 28-2, and 28-3 to the individual mode side indicated by solid lines in FIG. Then, the telephone 11b is called via the repeater unit 24 to establish a communication channel. In this configuration, the call ends and the telephone 11a
Or, when the telephone 11b is on-hook, the repeater unit 2
The operation 4 closes the communication path and returns to the initial state.

Next, a case where the telephone 11a is called from the telephone 11a as a direct telephone will be described. In this case, the user dials a telephone number including the extension number “FH” on the telephone 11a. By dialing the extension number, the direct communication mode is set between the hotline setting / cancellation station and the hotline setting / cancellation station.

First, at the hotline set / canceled station, the exchange 13b operates the first digit "F" as in the case of the individual call.
Is detected, and the extension number “F” is assigned to the SR line of the line connection device 12b.
H ". Upon receiving this signal, the dial detecting circuit 23 determines that the call is a direct call and sends a direct setting signal to the control unit 25. Upon receiving this signal, the control unit 25 switches the switches 28-1, 28-2, 28-3.
Are respectively connected to the direct mode side shown by the broken line in FIG. Then, the telephone 11b is called via the repeater unit 24. In this way, a communication path in the direct communication mode at the hotline set / released station is configured.

On the other hand, on the hotline setting / cancellation station side,
When the line connection device 12a detects the extension number “FH” in the PB detection circuit 26, the control unit 25 is instructed to set the direct communication mode. The control unit 25 receives the instruction and connects the switches 28-1, 28-2, 28-3 to the direct communication mode side.

In this direct communication mode, even if the telephone call ends and either the telephone 11a or the telephone 11b goes on-hook, the hotline setting / cancellation station and the hotline set /
In any of the stations to be released, the SS line is dropped to the ground 31, so that the exchanges 13a and 13b are kept closed, and the communication path is not closed. In the direct communication mode, when the telephone 11a is off-hook while both the telephone 11a and the telephone 11b are on-hook, the telephone 11b can be called without dialing to make a call. Similarly, when the telephone 11b is off-hook, the telephone 11a can be called without a dialing to talk. That is, the line connection device 1
In 2a, when the telephone 11a goes off-hook, a DTMF signal (for example, “##”) is transmitted from the DTMF transmission circuit 21. The line connection device 12b converts this DTMF signal to D
The TMF detection circuit 22 detects the signal, and in response, transmits an incoming call signal to the repeater unit 24. Then, the repeater unit 24 calls the telephone set 11b. The same applies to the calling operation of the telephone 11a from the telephone 11b.

The operation of releasing the hot line mode will be described. In this case, the telephone 11a and the telephone 11
The telephone 11a dials a hotline release signal (for example, "**") during the call connection with the terminal b. In the line connection device 12a of the hotline setting / release station, this signal is
The detection is performed by the B detection circuit 26, and the switches 28-1, 28-2, and 28-3 are returned to the individual mode side so that the control unit 25 cancels the direct communication mode. On the other hand, in the line connection device 12b of the hotline set / released station, the received hotline release signal is detected by the DTMF circuit 22, and the control unit 25b.
Switches 28-1, 28- to release the direct communication mode.
2, 28-3 is returned to the individual mode side. Release of the hot line mode from the telephone set 11b is the same.

[0032]

As described above, according to the present invention,
The switching control between the direct connection mode and the individual mode is performed in the line connection device disposed between the private branch exchange and the terminal. Therefore, the switching of the switching device and the line connection device by the operator when setting / cancelling the direct connection mode. The operation can be made unnecessary, and the setting / cancellation of the direct communication mode can be performed using the extension number. As a result, the management of telephone numbers can be facilitated, and the operation of the hot line connection system can be simplified.

Further, according to the present invention, the originating private branch exchange and the destination exchange are connected regardless of whether the originating terminal and the destination terminal are connected in the individual mode or in the direct communication mode. Since the connection is made by the individual line, the direct line can be omitted, and the communication cost in the direct mode can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a hot line connection system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an internal configuration of a line connection device of the hot line connection system according to one embodiment of the present invention.

FIG. 3 is a diagram showing an overall configuration of a conventional hot line connection system.

[Explanation of symbols]

11a, 11b telephone, 12a, 12b line connection device, 13a, 13b exchange, 14a, 14b modem,
25 control part, 28-1, 28-2, 28-3 switch.

Claims (1)

(57) [Claims] Transmitting a 1. A originating private branch exchange is provided on the side of the transmitting terminal, the called party private branch exchange is provided on the side of the receiving terminal, the originating side voice line and a control signal for transmitting a call signal
An originating line connection device connected to the originating private branch exchange via an originating side control line, and an incoming voice line for transmitting a call signal and a control signal are transmitted.
Via the terminating side control line, a hot line connection system comprising: a called party line connection device connected to the called party private branch exchange, the calling line connecting device and a DTMF transmitting circuit, the transmitting terminal The extension number input from the terminal receives the number for setting the direct communication mode , and the calling side voice line and the DTMF transmission
Output circuit, and ground the transmission side control line.
That the originating direct mode setting means, wherein the said called party line connection device and DTMF receiver circuit, said extension number being inputted from the caller terminal receives the number for setting direct mode, the said called party voice line DTMF Receiving
Communication circuit and ground the receiving side control line.
Hotline connection system, which comprises a called party direct mode setting means that, the.