JP2748466B2 - Communication system with order wire device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a terminal device installed in each station or an order wire device provided in a relay device, and between stations (order wire devices) and between stations (order wire). Wire device)
The present invention relates to a communication system for performing communication between a subscriber terminal (telephone) via a telephone line exchange (hereinafter simply referred to as an exchange).

[Conventional technology]

Some order wire devices are provided in terminal devices and relay devices installed in each station. The plurality of terminal devices and the relay device are connected in tandem via a transmission path. Conventionally, in a communication system including such an order wire device, a call between order wire devices installed in each station is mainly used. Further, when making a call with a subscriber line via the exchange, the call can be made only from the order wire device directly connected to the exchange.

[Problems to be solved by the invention]

In the conventional communication system including the order wire device described above, communication between the order wire devices of the respective stations can be performed, but the communication with the subscriber line via the exchange is performed by the order wire device connected to the exchange. It is limited to the configured station, and calls from other stations (order wire equipment) to the subscriber line via the exchange cannot be made. When it is necessary to make a call to the subscriber line from such an office (order wire equipment not connected to the exchange),
You have to pull in the subscriber line to each station by radio,
There is a disadvantage that the cost is high also in terms of the system.

An object of the present invention is to eliminate the drawbacks and to provide a communication system provided with an orderwire device that enables an orderwire device not connected to the exchange to communicate with a subscriber line.

[Means for solving the problem]

According to the present invention, a plurality of stations configured by connecting an order wire device to a relay device or a terminal device are connected in tandem via a transmission line, and an order wire device not connected to the exchange is connected to the exchange. A communication system including an order wire device for communicating with a subscriber line accommodated in the exchange via the ordered order wire device, wherein the order wire device connected to the exchange accommodates the subscriber line. A first interface unit for communicating with the exchange, the relay device or the terminal device of the local station,
A second line for communicating with the order wire device of the other station via the transmission line and the relay device or the terminal device of the other station.
When a connection request signal is detected in a signal from the order wire device of another station input via the second interface unit, an interface is provided between the first interface unit and the exchange. Establishes an interface between the second interface unit and the order wire device of the other station via the relay device or the terminal device of the own station, the transmission line, and the relay device or the terminal device of the other station. And a communication path control unit that performs
The first and second interface units each establish an interface between the predetermined devices, thereby establishing a communication path between the order wire device of the other station and a subscriber line accommodated in the exchange. It is characterized by:

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The communication system including the order wire device includes, for example, an exchange 2, an order wire device 3, and a terminal device 4 that constitute a first station, an order wire device 6, and a relay device 5 that constitute a second station. , 7 and exchange 1 that constitutes the third station
1, an order wire device 9, relay devices 8 and 12, and an order wire device 14 and a terminal device 13 constituting a fourth station.

In a communication system having such an order wire device, the exchanges 2 and 11 accommodate the subscriber lines 1 and 10, respectively, and transmit signals to and from the order wire devices 3 and 9.

The terminal devices 4 and 13 constituting the first and fourth stations transmit signals to and from the order wire devices 3 and 14, respectively.

Each of the relay devices 5 and 7 constituting the second station transmits signals to and from the order wire device 6.

Similarly, the relay devices 8 and 12 constituting the third station also transmit signals to and from the order wire device 9, respectively.

As described above, in the present embodiment, the terminal devices 4 and 13 and the relay devices 5, 7, 8, and 12 constituting the first to fourth stations are connected in tandem via the transmission path, and each station has The order wire devices 3, 6, 9 and 14 are attached respectively. The exchanges 2 and 11 are connected to the order wire devices 3 and 9 as described above. In this embodiment, the exchange 2,
The order wire devices 3, 9 to which 11 is connected are as shown in FIG.

As shown in FIG. 2, the order wire device includes an exchange interface 21, a 2-wire / 4-wire conversion circuit 22, a communication path control circuit 23, a headset 24,
Control switch 25 and DTMF (Dual Tone Multi Frequenc
y) Generator 26, keypad 27 and DTMF receiver 2
8, a timer circuit 29, a tone generation circuit 30, a station number setting switch 31, and a 4-wire branch circuit 32.

In the order wire device having such a configuration, the exchange interface 21 is an interface for the exchange connected to the exchange connection terminal 33, and a signal from the exchange connection terminal 33 is transmitted through the 2-wire / 4-wire conversion circuit 22. And outputs it to the communication path control circuit 23.
A signal input from the communication path control circuit 23 via the wire conversion circuit 22 is output to the exchange connection terminal 33. Further, the exchange interface 21 outputs an off-hook signal to the exchange connection terminal 33 by the communication path control circuit 23.

The headset 24 is used for communication with an order wire device of another station.

When the DTMF signal is input from the communication path control circuit 23, the DTMF receiver 28 determines the DTMF signal and outputs a result of the determination to the communication path control circuit 23.

The timer circuit 29 determines the output time of the tone from the tone generation circuit 30, which is output from the communication path control circuit 23.

The tone generation circuit 30 sends a DT (Dial
Tone), BT (Busy Tone) or RBT (Ring Back Tone)
Is output.

The station number setting switch 31 is used to set in advance the station number of the order wire device including the station number setting switch 31.

The four-wire branch circuit 32 branches the signal from the communication path control circuit 23 and outputs it to the four-wire output terminals 35 and 37.
The signals from the wire input terminals 34 and 36 are output to the communication path control circuit 23. That is, the 4-wire branch circuit 32 connects the terminal device 4 of the own station and the communication path control circuit 23.

The communication path control circuit 23 accommodates a control switch 25 and a DTMF generator 26 to which a keypad 27 is connected,
Similarly, the presence / absence of a connection request signal in the determination result from the contained DTMF receiver 28 is checked. When the connection request signal is detected, the communication path control circuit 23 connects the 2-wire / 4-wire conversion circuit 22 to the 4-wire branch circuit. With this connection, the exchange connection terminal 33 and the 4-wire input terminals 34, 4
The wire output terminal 35, the 4-wire input terminal 36, and the 4-wire output terminal 37 are connected via the exchange interface 21, the 2-wire / 4-wire conversion circuit 22, the communication path control circuit 23, and the 4-wire branch circuit 32, and A route is established.

Next, the operation of the present embodiment will be described by taking as an example a case where the order wire device having the configuration shown in FIG.

First, a case where the order wire device of the partner station constituting the second station (hereinafter, also simply referred to as the partner station), that is, the case where the order wire device 6 talks with the telephone set of the subscriber connected to the subscriber line 1 will be described. 3 will be described with reference to FIG.

Off-hook signal from the order wire device 6 of the partner station
A call signal consisting of 41, a connection request signal 42, and a station number 43 is output. These three signals are DTMF signals respectively assigned for off-hook, connection request, and station number. The call signal of the DTMF is transmitted to the order wire device 3 via the relay device 5 → the terminal device 4.
The signal is input to the wire input terminal 34 or 36. The DTMF call signal is input to the DTMF receiver 28 via the 4-wire branch circuit 32 → the communication path control circuit 23. DTMF receiver
28 determines the call signal of the DTMF, and outputs a result of the determination, that is, a signal related to the call signal to the communication path control circuit 23. The communication path control circuit 23 checks the station number 43 included in the signal as a result of the determination with the station number set in advance by the station number setting switch 31, and checks whether or not the connection request signal 42 exists. Then, when the communication path control circuit 23 determines that the station number 43 from the partner station is the number of the order wire device 3 and the connection request signal 42 is included in the call signal, the communication path control circuit 23 The RBT from the tone generation circuit 30 is output for the time specified by. This RBT is output to the 4-wire output terminal 35 or 37 via the 4-wire branch circuit 32. The output RBT 44 is output to the order wire device 6 of the partner station. After this output, a communication path is established via the exchange interface 21 of the order wire device 3 constituting the first station. That is, the signal from the order wire device 6, which is input to the 4-wire input terminal 34 or 36 of the order wire device 3, is converted into a 4-wire branch circuit 32 → a communication path control circuit 23 → 2 wire / 4 wire conversion circuit 22 → switch. Interface 21 → exchange connection terminal 33
, And can be transmitted to the exchange 2. Also,
A signal input from the exchange 2 to the exchange input terminal 33 of the order wire device 3 is transmitted to the exchange interface 21.
→ 2-wire / 4-wire conversion circuit 22 → communication path control circuit 23 → 4
The transmission can be made to the order wire device 6 via the wire branch circuit 32 → 4-wire output terminal 35 or 37. At the same time, the exchange interface 21 outputs the off-hook signal 45
To the exchange 2. When the exchange 2 goes off-hook in response to the off-hook signal 45, the exchange 2 returns DT46. The DT 46 is transmitted via the order wire device 3 to the order wire device 6 of the partner station. After receiving the DT 46, the order wire device 6 of the partner station outputs the station number 47 of the subscriber line to the exchange 2, and the telephone of the subscriber connected to the subscriber line 1 designated by the station number 47 is called. It becomes possible. When the telephone of the subscriber connected to the subscriber line 1 is ringing, the exchange 2 transmits the RBT48 to the order wire device 3.
return it. The order wire device 3 transmits the RBT 48 to the order wire device 6 of the partner station. When the subscriber's telephone connected to the subscriber line 1 goes off-hook, the other party's order wire device 6 can make a call 49 with the subscriber's telephone connected to the subscriber line 1 via the order wire device 3. State.

When the call ends, the order wire device 6 of the partner station
An on-hook signal 50 is output to the order wire device 3.
The on-hook signal 50 is input to the DTMF receiver 28 via the 4-wire branch circuit 32 of the order wire device 3 → the communication path control circuit 23. When the on-hook signal determined by the DTMF receiver 28 is further identified by the communication path control circuit 23 as a signal indicating on-hook, the communication path control circuit 23
As a result, the exchange interface 21 outputs an on-hook signal 51 to the exchange 2. Then, the communication path between the exchange 2 and the order wire device 6 of the partner station is disconnected.

Next, the case where the order wire device 6 of the partner station talks with the order wire device 3 will be described with reference to FIG.

Off-hook signal from the order wire device 6 of the partner station
A DTMF calling signal composed of 61 and station number 62 is output. The DTMF calling signal is input to the 4-wire input terminal 34 or 36 of the order wire device 3 and sent to the DTMF receiver 28 via the communication path control circuit 23. The DTMF receiver 28 determines the DTMF calling signal, and outputs a signal related to the calling signal to the communication path control circuit 23. Since this signal does not include the connection request signal, the communication path control circuit 23 outputs the RBT 63 from the tone generation circuit 30 to the order wire device 6 of the partner station via the 4-wire branch circuit 32. I do. Then, when the order wire device 3 goes off-hook, a communication path is established, and the order wire device 6 of the partner station is connected to the headset 24 of the order wire device 3.
And the call 64 becomes possible. That is, the signal from the order wire device 6 input to the 4-wire input terminal 34 or 36 of the order wire device 3
→ The signal is input to the headset 24 via the communication path control circuit 23. The signal from the headset 24 is output to the order wire device 6 via the communication path control circuit 23 → the 4-wire branch circuit 32 → the 4-wire output terminal 35 or 37.

When the call ends, the order wire device 6 of the partner station
The DTMF on-hook signal 65 is output. The DTMF on-hook signal 65 is sent to the DTMF receiver 28 via the 4-wire branch circuit 32 → the communication path control circuit 23 of the order wire device 6. The DTMF receiver 28 determines the on-hook signal of the DTMF, and outputs a signal related to the on-hook signal to the communication path control circuit 23. When this signal is identified as an on-hook signal by the communication path control circuit 23, the communication path between the headset 24 and the order wire device 6 of the partner station of the headset 24 is disconnected.

In the case where a telephone set of a subscriber connected to the subscriber line 1 (hereinafter, referred to as a station of the subscriber line 1) makes a call with the order wire device 6 of the partner station, the call, call, and disconnection procedures in FIG. This will be described with reference to the drawings.

When the station of the subscriber line 1 talks with the order wire device 6 of the partner station, the exchange 2 accommodating the telephone set of the subscriber connected to the subscriber line 1 (hereinafter, also simply referred to as the subscriber line 1). , The ringer 71 is output. The ringer 71 is output from the exchange 2 by, for example, dialing a predetermined number from the station of the subscriber line 1 (the same applies hereinafter). The order wire device 3 outputs an off-hook signal 72 to the exchange 2. In response to this off-hook signal 72, the station number 73 of the order wire device 6 of the partner station is input from the subscriber line 1 (the telephone set of the subscriber connected to the subscriber line 1) to the exchange 2 and the order wire device 6. You. The order wire device 6 outputs the RBT 74 to the order wire device 3 and the exchange 2 because the input station number 73 is the station number of its own device (the order wire device 6 constituting the second station). Then, when the order wire device 6 goes off-hook, a communication path is established. As a result, the station of the subscriber line 1 (the telephone set of the subscriber connected to the subscriber line 1) is connected to the exchange 2, the exchange interface 21 of the order wire device 3, the 2-wire / 4-wire conversion circuit 22, the communication path control circuit. Via the 23,4 wire branch circuit 32, it becomes possible to make a call 75 with the order wire device 6.

On end of call, on-hook signal from subscriber line 1 station
76 is input to the order wire device 3 via the exchange 2. When determining that the input signal is an on-hook signal, the order wire device 3 outputs an on-hook signal 77 to the order wire device 6 of the partner station. Then, the communication path between the subscriber line 1 and the order wire device 6 of the partner station is disconnected.

The case where the station of the subscriber line 1 makes a call with the order wire device 3 will be described with reference to FIG. 6 showing a call, call and disconnection procedure.

When the station of the subscriber line 1 talks with the order wire device 3, the ringer 81 is output from the exchange 2 accommodating the subscriber line 1. When the ringer 81 is input to the order wire device 3, the order wire device 3 outputs an off-hook signal 82 to the exchange 2. In response to the off-hook signal 82, the station number 83 of the order wire device 3 is input from the subscriber line 1 to the order wire devices 3 and 6 via the exchange 2. The order wire device 3 outputs the RBT 84 to the exchange 2 because the input station number 83 is the own station number. Then, when the order wire device 3 goes off-hook, a state in which a call 85 is possible is established.

On end of call, on-hook signal from subscriber line 1 station
86 is input to the order wire device 3 via the exchange 2. By the order wire device 3. When the input signal is determined to be an on-hook signal, the communication path with the subscriber line 1 is disconnected.

The case where the order wire apparatus 3 makes a call with the station of the subscriber line 1 will be described with reference to FIG. 7 showing a call, call and disconnection procedure.

When the order wire device 3 communicates with the station of the subscriber line 1, the order wire device 3 outputs an off-hook signal 91 to the exchange 2. In response to the off-hook signal 91, the exchange 2 accommodating the subscriber line 1 outputs a DT 92.
When the DT 92 is input, the order wire device 3 outputs the station number 93 of the subscriber line 1 to the exchange 2. This station number 93
In response, the exchange 94 sends the order wire device 3 an RBT94
Is output and when the user goes off-hook, the order wire device 3
Is ready for a call 95 with the station on the subscriber line 1.

When the on-hook signal 96 is output from the order wire device 3 at the end of the call, the communication path with the subscriber line 1 is disconnected.

The case where the order wire apparatus 3 communicates with the order wire apparatus 6 of the partner station will be described with reference to FIG. 8 which shows a call, a call, and a disconnection procedure.

When the order wire device 3 communicates with the order wire device 6 of the partner station, the order wire device 3 sends a call signal including the off-hook signal 101 and the station number 102 of the order wire device 6 to the order wire device 6 of the partner station. Output to In response to this call signal, the order wire device 6 of the partner station outputs the RBT 103 to the order wire device 3 and goes off-hook, so that a call 104 can be made.

When the on-hook signal 105 is output from the order wire device 3 at the end of the call, the communication path with the order wire device 6 of the partner station is disconnected.

As described above, according to the present embodiment, the case where the call signal from the partner order wire station to the own station via the order wire network includes the connection request signal to the exchange, and the case where the own station transmits the subscriber line via the exchange. Is established, a communication path is established between the local station order wire device and the exchange via the exchange interface. Also, when the local station is called from the subscriber line via the exchange, a communication path between the local station order wire device and the exchange and the order wire network is established, and any subscriber line can be accessed from any order wire device. A communication path can be established from any subscriber line to any order wire device.

〔The invention's effect〕

As described above, according to the present invention, there is an effect that a call can be made from each order wire device to a subscriber line and from the subscriber line to each order wire device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing an example of the order wire apparatus of FIG. 1, and FIGS. 3 to 8 are first calling and telephone calls. It is a figure which shows the procedure of cutting. 1,11 subscriber line 2,10 exchange 3,6,9,14 order wire equipment 4,13 terminal equipment 5,7,8,12 relay equipment 21 exchange interface 22 2-wire / 4-wire conversion circuit 23 Communication path control circuit 24 Headset 25 Control switch 26 DTMF generator 27 Keypad 28 DTMF receiver 29 Timer circuit 30 ... Tone generation circuit 31 ... Station number setting switch 32 ... 4-wire branch circuit 33 ... Exchange connection terminal 34,36 ... 4-wire input terminal 35,37 ... 4-wire output terminal

Claims (4)

(57) [Claims] A plurality of stations configured by connecting an order wire device to a relay device or a terminal device are connected in tandem via a transmission line, and an order wire device not connected to an exchange is replaced by an exchange. A communication system comprising an order wire device for communicating with a subscriber line accommodated in the exchange via an order wire device connected to the exchange, wherein the order wire device connected to the exchange includes a subscriber line. A first for communicating with the exchange to be accommodated
And a second interface unit for communicating with the order wire device of the other station via the relay device or terminal device of the own station, the transmission line, and the relay device or terminal device of another station. When a connection request signal is detected in a signal input from the order wire device of another station input via the second interface unit, an interface is established between the first interface unit and the exchange, The second interface unit and its own relay device or terminal device, transmission path,
And a communication path control unit that establishes an interface with the order wire device of the other station via a relay device or a terminal device of another station, wherein the first and second interface units are respectively provided with the predetermined A communication path is established between an order wire device of said other station and a subscriber line accommodated by said exchange by establishing an interface between said devices. 2. The order wire device has a unique station number, and the communication path control unit is included in a signal from another station order wire device input via the second interface unit. The communication system according to claim 1, wherein the connection request signal is detected only when the station number matches the unique station number. 3. A plurality of stations constituted by connecting an order wire device having a station number to a relay device or a terminal device are connected in tandem via a transmission line and are not connected to an exchange. An apparatus is a communication system including an order wire device for communicating with a subscriber line accommodated in the exchange via an order wire device connected to the exchange, wherein the order wire device connected to the exchange is: A first for communicating with said exchange accommodating the subscriber line;
And a second interface unit for communicating with the order wire device of the other station via the relay device or terminal device of the own station, the transmission line, and the relay device or terminal device of another station. And a station number included in a signal from the order wire device of another station input through the second interface unit;
A station number discriminating means for discriminating whether or not the station number is unique to the own station; and, if the station number is discriminated by the station number discriminating means, the other station input through the second interface unit. Connection request signal detection means for detecting whether or not there is a connection request signal in the signal from the order wire device; and, when the connection request signal is detected by the connection request signal detection means, the first interface unit and the exchange. An interface is established between the second interface unit and its own relay device or terminal device, transmission line,
And means for establishing an interface with the order wire device of the other station via a relay device or a terminal device of the other station, wherein the first and second interface units are respectively provided between the predetermined devices. A communication path is established between an order wire device of the other station and a subscriber line accommodated in the exchange by establishing an interface in the communication system. 4. A plurality of stations, each of which is constituted by connecting an order wire device having a station number to a relay device or a terminal device, connected in tandem via a transmission line and not connected to an exchange. An apparatus is a communication system including an order wire device for communicating with a subscriber line accommodated in the exchange via an order wire device connected to the exchange, wherein the order wire device connected to the exchange is: A first for communicating with said exchange accommodating the subscriber line;
And a second interface unit for communicating with the order wire device of the other station via the relay device or terminal device of the own station, the transmission line, and the relay device or terminal device of another station. Means for establishing an interface between the first interface unit and the exchange when a ringer from the exchange input via the first interface unit is received; and Means for transmitting the station number input via the first interface unit to the order wire device of another station via the second interface unit; and the order wire device of another station having the transmitted station number. Means for establishing an interface between the first and second interface units, respectively. A communication system comprising an order wire device, wherein a communication path is established between an order wire device of the other station and a subscriber line accommodated in the exchange by establishing an interface between predetermined devices. .