JPH0795297A - Private branch exchanger system - Google Patents

Abstract

PURPOSE:To perform private broadcasting through plural ISDN telephone sets housed in an ISDN extension line by requesting simultaneous broadcasting from a switch box connected to a private branch exchange or an optional extension telephone to the extension line. CONSTITUTION:When the operation of requesting the simultaneous broadcasting is performed from the switch box 108 connected to the private branch exchange 101 or the optional telephone set to the ISDN telephone sets 110a-110c bus-connected to the ISDN extension line 112, the exchange 101 transmits a call setting message for the simultaneous broadcasting for specifying a channel for the simultaneous broadcasting to the ISDN telephone sets 110a-110c. When the call setting message is received, the respective ISDN telephone sets 110a-110c automatically respond and connect the channel for the simultaneous broadcasting and a speaker device. The exchange 101 receives the response message of the ISDN telephone sets 110a-110c and sets a speech path between the switch box 108 or the telephone set which requested the simultaneous broadcasting and the simultaneous broadcasting channel of the ISDN extension line. Thus, voice from the switch box 108 or the telephone set which requested the simultaneous broadcasting can be amplified and broadcasted from the speaker devices of the entire bus-connected ISDN telephone sets 110a-110c in private.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a private branch exchange,
In particular, it relates to a paging call system in a private branch exchange that accommodates an ISDN telephone in an extension line.

[0002]

2. Description of the Related Art Conventionally, one of the service functions of a private branch exchange is a function called paging, which is a function for paging. 4 and 5 show an example of a conventional private branch telephone exchange system having a paging function.

First, a paging call system in the private branch exchange system of FIG. 4 will be described.

In FIG. 4, when an incoming call is received from the office line 411 accommodated in the private branch exchange 401, the exchange control device 403 is notified via the office line trunk circuit 404. Upon being notified of an incoming call from the central office line 411, the exchange control device 403 notifies the relay stand 408 via the relay stand line circuit 405. When the operator of the relay stand 408 responds to the incoming call from the station line 411, a response signal is notified to the exchange control device 403 via the relay stand line circuit 405.
The exchange control device 403 uses the communication path circuit 402 to connect to the station line 4
11 sets up a communication path between the relay stand 408 and the relay stand 408.
The operator 08 is allowed to respond to the incoming call line 411. When the operator of the relay stand 408 calls the called party requested from the station line 411 by the local broadcast, the control code (broadcast call) from the relay stand 408 to the exchange control unit 403 via the relay stand line circuit 405 ( For example, the code of the function key that sets the paging is notified. The exchange control device 403 that has received the control code for calling the broadcast calls the call path circuit 4
02 is switched to listen to the holding sound on the station line 411, and the relay stand 408 is connected to the speaker apparatus 410 for private broadcasting via the relay stand line circuit 405 and the speaker trunk 407. As a result, the operator of the relay stand 408 can call the called party by the local broadcast via the speaker device 410.

Next, the paging call system in the private branch exchange system of FIG. 5 will be described.

In FIG. 5, when an incoming call is received from the office line 509 accommodated in the private branch exchange 501, the exchange control device 503 is notified via the office line trunk circuit 504. Upon being notified of an incoming call from the central office line 509, the exchange control device 503 notifies the relay stand 507 via the relay stand line circuit 505. When the operator of the relay stand 507 responds to the incoming call from the station line 509, a response signal is notified to the exchange control device 503 via the relay stand line circuit 505.
The exchange control device 503 uses the communication path circuit 502 to connect to the station line 5
09 and the relay stand 507, a call path is set up, and the relay stand 5
The operator 07 is allowed to respond to the incoming call line 509. When the operator of the relay stand 507 calls the called party requested from the station line 509 by the local broadcast, the control code (broadcast call) from the relay stand 507 to the exchange control device 503 via the relay stand line circuit 505 ( For example, the code of the function key that sets the paging is notified. The exchange control device 503 that has received the control code for calling the broadcast calls the call path circuit 5
02 is switched to listen to the holding tone from the station line 509, and the relay stand 507 is connected to the relay stand line circuit 505. The speaker devices built in the analog extension telephones 508a-508c are connected via the analog extension line circuits 506a-506c. As a result, the operator of the relay stand 507 can call the called party by the local broadcast via the analog extension telephones 508a to 508c.

[0007]

However, in the conventional paging calling system, the former requires a speaker device for private broadcasting and its wiring in addition to the extension telephone.

In the latter case, when the ISDN telephone is accommodated in the ISDN extension line in a path form, the ISDN interface standard defines one line and two voice channels.
Since there are only channels, there is a problem in the normal connection procedure that when three or more ISDN telephones are connected, it is not possible to broadcast to all ISDN telephones.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a private branch exchange system comprising a private branch exchange and a plurality of ISDN telephones accommodated in the private branch exchange, The private branch exchange is connected to the ISDN extension line in a bus form.
The ISDN telephone is provided with a means for transmitting a call setting message for broadcasting that specifies a broadcasting channel to the DN telephone, and the ISDN telephone automatically responds when receiving the speaker setting for loudspeaking and the call setting message. Broadcasting from a relay stand or any extension telephone connected to the private branch exchange to an extension line connecting the ISDN telephone, comprising means for connecting a broadcast channel and the speaker means. Requesting all the I's connected to the private branch exchange in a bus form.
The present invention provides a private telephone exchange system for simultaneous broadcasting using SDN telephones.

[0010]

In such a structure, when the relay station connected to the private branch exchange or an arbitrary extension telephone performs an operation of executing a broadcast request to an ISDN telephone connected to an ISDN extension line in a bus shape, The exchange switches the call path to allow the caller to listen to the hold tone, and transmits a call setup message for broadcast that specifies the broadcast channel to the ISDN telephone. When each ISDN telephone receives the call setting message, it determines whether it is a setting message for broadcast and whether it is currently connectable. If it is connectable, it sends a response message to the private branch exchange. It transmits and responds automatically and connects the broadcast channel and the speaker device built into the ISDN telephone. That is, all connectable ISDN telephones connect the broadcast channel and the built-in speaker device. When the private branch exchange receives the response message from the ISDN telephone, it sets up a communication path between the relay station or extension telephone which requested the broadcast and the broadcast channel for the ISDN extension.

In this way, the voice from the relay stand or extension telephone which requested the simultaneous broadcasting is loudly broadcast to the premises from the speaker devices of all the ISDN telephones connected to the ISDN extension line in a bus form.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a private branch exchange system according to an embodiment of the present invention. FIG. 2 is a format of a call setup message according to an embodiment of the present invention. FIG. 3 is a flowchart of a message according to an embodiment of the present invention. In FIG. 1, 101 is a private branch exchange having a paging function, 102 is a speech path circuit, 1
Reference numeral 03 is an exchange control device, 104 is an office line trunk circuit, 1
Reference numeral 05 is a relay stand line circuit, 106 is an analog extension line circuit, and 107 is an ISDN extension line circuit. Also,
108 is a relay stand, 109 is an analog extension telephone, 110
a-110c is an ISDN telephone, 111 is an office line, 112
Is an ISDN extension line.

The operation of the system having such a configuration will be described with reference to the configuration diagram of FIG. 1 and the flowchart of FIG.

In FIG. 1, when an incoming call is received from the office line 111 accommodated in the private branch exchange 101, it is notified to the exchange control device 103 via the office line trunk circuit 104 (F
301). Upon being notified of an incoming call from the central office 111, the exchange control device 103 notifies the relay stand 108 via the relay stand line circuit 105 (F302). Relay stand 1
When the handler 08 responds to the incoming call from the central line 111, a response signal is notified to the exchange control device 103 via the relay stand line circuit 105. (F303). The exchange control device 103 sets a call path between the station line 111 and the relay stand 108 by the call path circuit 102, and allows the operator of the relay stand 108 to respond to the incoming call line 111. The operator of the relay stand 108 sends the called party requested from the central line 111 to the ISDN.
When the ISDN telephones 110a-110c connected to the extension line 112 in a bus-like manner call by private broadcasting, a call is made from the relay stand 108 to the exchange control unit 103 via the relay stand line circuit 105 and the ISDN extension line 112 is designated. Control code (for example, the code of the function key for which general calling is set) is notified (F30
4). Upon receiving the control code for calling the broadcast, the exchange control device 13 selects one of the idle voice channels of the ISDN extension line 112 as the broadcast channel. The selected broadcast channel (here, B
1 channel is set in the channel identifier information element, and a code (in this case, A
A Hex) is set in the destination sub-address information element to create a call setup message for broadcast. (See FIG. 2) Then, the exchange control device 103 transmits the call setting message for broadcast to the ISDN extension line 112 via the ISDN extension line circuit 107 (F30).
5).

In ISDN telephones 110a-110c,
When the call setup message is received, the called subaddress information element is examined to determine that it is for AA Hex broadcasting, and whether it is currently busy or not. If it is not busy, a response message is sent to ISDN. Notify the exchange control device 13 via the extension line circuit 107 (F30
6).

The exchange control device 103 is an ISDN telephone 1.
When the response message from 10a-110c is received,
A response confirmation message is sent to each ISDN telephone 110.
a-110c, and the communication path circuit 102 sets a communication path between the relay stand 108 and the ISDN extension line 112 broadcast channel (B1 channel) by 102.
The voice of the operator of the relay stand 108 is sent to the B1 channel (F307).

In ISDN telephones 110a-110c,
When the response confirmation message is received, the broadcast channel (B1 channel) and the ISDN telephones 110a to 110c are received.
Connect to the speaker device built in to broadcast the audio on the broadcast channel (B1 channel).

As described above, the operator of the relay stand 108 can make a loud broadcast on the premises via the speaker devices of all the ISDN telephones 110a-110c that are not busy and are connected to the ISDN extension line 112 in a bus shape. You can

[0020]

As described above, according to the present invention,
Even when a plurality of ISDN telephones are accommodated in the ISDN extension line in the form of a bus, it is possible to perform the local broadcast through all the ISDN telephones. Further, since the bus of the ISDN extension line can be used as it is for the internal broadcasting, it is not necessary to provide the speaker device for the internal broadcasting and its wiring other than the internal telephone, and the internal paging system can be constructed efficiently. .

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a private branch exchange system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a format of a call setup message according to an embodiment of the present invention.

FIG. 3 is a diagram showing a format of a message according to an embodiment of the present invention.

FIG. 4 is a block diagram showing the configuration of a conventional telephone exchange system having a paging function.

FIG. 5 is a block diagram showing a configuration of a conventional private branch telephone exchange system having a paging function.

[Explanation of symbols]

 101 private branch exchange 102 speech path circuit 103 exchange control device 104 office line trunk circuit 105 relay stand line circuit 106 analog extension line circuit 107 ISDN extension line circuit 108 relay stand 109 analog extension telephone 110a-110c ISDN telephone 111 111 station line

Claims (1)

[Claims] 1. A private branch exchange system comprising a private branch exchange and a plurality of ISDN telephones accommodated in the private branch exchange, wherein the private branch exchange is connected to the ISDN telephone connected to an ISDN extension line in a bus form. Is provided with a means for transmitting a call setting message for broadcast that specifies a broadcast channel, and the ISDN telephone has speaker means for performing a loud broadcast,
When the call setup message is received, it automatically responds, and comprises means for connecting the broadcast channel and the speaker means, and the ISDN from the relay stand connected to the private branch exchange or any extension telephone. A private branch telephone exchange system, characterized in that a broadcast request is made to an extension line connecting telephones to broadcast all the ISDN telephones connected to the private branch exchange in a bus form.