JPH0514944A - Exchange system of remote station telephone exchange - Google Patents

Abstract

PURPOSE:To reduce the number of speech path device for a PCM digital line and a master station telephone exchange station in an exchange system controlling a remote station telephone exchange from the master station. CONSTITUTION:The connection between remote station telephone exchanges existing at a same remote station is performed by a PCM digital line 6-2 and an office data memory 11 registering the classification of the connection method of the PCM digital line is provided in a master station telephone exchange. When the speech between storage subscribers of the remote station telephone exchanges existing within the same remote station is performed, a control device 10 of the master station telephone exchange investigates the presence or absence of the PCM digital line 6-2 connecting between remote station telephone exchanges by retrieving the office data memory 11 and commands a control device 4 of the remote station telephone exchange to set a speech path to this. By this, the speech path between the storage subscribers of the remote station telephone exchanges existing within the same remote station is set within the remote station without being interposed by a PCM digital line 6-1 to the master station and a speech path device 9 of the master station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone switchboard, and more particularly to a switching system for a remote station telephone switchboard which performs a switching operation under the control of a master station telephone switchboard.

[0002]

2. Description of the Related Art An example of a conventional remote station telephone exchange system will be described with reference to FIG. Traditional remote station telephone exchanges
As shown in FIG. 2, the accommodating subscribers A to D of the remote station telephone switchboard, the concentrator circuits 2 and 12 connected through the subscriber circuits 1 and 11 respectively, and the time division multiplexing circuits 3 and 13 are connected.
, Control devices 4 and 14, and PCM digital line control circuits 5 and 15 for controlling the PCM digital lines 6 and 16, respectively. Further, the master station telephone exchange comprises a PCM digital line control circuit 7, 17, a time division multiplexing circuit 8, 18, a communication path device 9 and a control device 10.
It consists of

In the conventional exchange system, the speech paths of the subscribers A to D of the remote station telephone exchange all enter the master station telephone exchange through the PCM digital lines 6 and 16, and the speech channel device of the master station telephone exchange is used. It was connected via 9.

[0004]

This conventional remote station telephone exchange switching system is such that all the subscribers of the remote station telephone exchange have their communication channels routed through the PCM digital circuit by the channel system of the master station telephone switch. Since they were connected, it is necessary to use the communication channel of the PCM digital line and the communication path device of the master station telephone switch even during the call between the subscribers of the remote station telephone switch in the same remote station, and it is in the same remote station. There is a problem that the PCM digital line and the call path device of the master station telephone exchange must be set in consideration of the call volume between the accommodated subscribers of the remote exchange.

[0005]

SUMMARY OF THE INVENTION The exchange system of a remote station telephone exchange according to the present invention is a remote station telephone exchange system which is connected to a master station telephone exchange system by a PCM digital line and which performs an exchange operation under the control of the master station telephone exchange system. Control the time division multiplex circuit of the remote station telephone exchange by analyzing the station data memory of the master station telephone exchange that registers the type of PCM digital line connection method and the station data of the station data memory when setting the communication path. A control device for a master station telephone exchange that commands a control device for a remote station telephone exchange, and a control device for a remote station telephone exchange that controls a time division multiplex circuit of the remote station telephone exchange according to a command from the master station telephone exchange. It is a thing.

[0006]

According to the present invention, the telephone call of the accommodated subscriber of the remote station telephone exchange located in the same remote station is set up using the PCM digital line connecting the remote station telephone exchanges.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a switching system for a remote station telephone exchange according to the present invention. In FIG. 1, the same reference numerals as those in FIG. 2 indicate corresponding parts, and the PCM digital lines are classified according to the connection method, and the PCM digital line 6-1 for connecting between the remote station telephone switchboard and the master station telephone switchboard, There is a PCM digital line 6-2 connecting between remote station telephone exchanges located in the same remote station. Further, the master station telephone exchange includes a PCM digital line control circuit 7 and 17, a time division multiplexing circuit 8 and 18, and a speech path device 9.
And a station data memory 20 for registering the type of connection method of the control device 10 and the PCM digital line.

Then, when the communication path is set, the station data in the station data memory 20 is analyzed and the control of the time division multiplex circuit 3 (13) of the remote station telephone exchange is carried out by the control unit 4 (14) of the remote station telephone exchange. Control device 10 of the central office telephone exchange to issue a command
And a control unit 4 (14) for the remote station telephone exchange, which controls the time division multiplexing circuit 3 (13) of the remote station telephone exchange in accordance with a command from the master station telephone exchange.

Next, the operation of the embodiment shown in FIG. 1 will be described. First, maintenance information such as calling / disconnection / dial number information and alarms of the accommodated subscribers A to D of the remote station telephone switchboard is controlled by the control information channel of the PCM digital line 6-1 connected to the master station telephone switchboard. Via the central office telephone switchboard. In addition, control information such as control of the time division multiplex circuit 3 of the remote station telephone exchange is also sent from the master station telephone exchange to the PCM.
Commanded via the control information channel of digital line 6-1. Below, an accommodating subscriber A (hereinafter referred to as a calling subscriber A) accommodated in a remote station telephone exchange (hereinafter referred to as a calling subscriber A) is a receiving subscriber C (hereinafter referred to as a receiving subscriber C) accommodated in a remote station telephone exchange within the same remote station.
The case of making a call to the called subscriber C) will be described as an example. The call originating from the calling subscriber A is detected by the subscriber circuit 1 and reported via the concentrator circuit 2 to the control unit 4 of the remote exchange. The control device 4 of this remote station telephone switchboard adds the subscriber's accommodation position information to the calling information P
The control information channel of the CM digital line 6-1 is used to report to the control device 10 of the central office telephone exchange. And
Upon receiving the calling information, the control device 10 of the master station telephone exchange sends a dial tone to the calling subscriber A to the control device 4 of the remote station telephone exchange using the control information channel of the PCM digital line 6-1. Instruct to receive the dial number. Upon receiving the dial number from the calling subscriber A, the control unit 4 of the remote station telephone exchange stops the dial tone and dials the control unit 10 of the master station telephone exchange through the control information channel of the PCM digital line 6-1. Report number information.

Next, the control device 10 of the main office telephone exchange.
When all digits of the dial number have been received, the command instructs the control device 4 of the remote station telephone switchboard to stop receiving the dial number via the control information channel of the PCM digital line 6-1 and to receive an incoming call from the received dial number. The PCM of the remote station telephone exchange that accommodates the incoming subscriber is used to check the accommodation position of the incoming subscriber and to call the incoming subscriber and monitor the response of the incoming subscriber to the control device 14 of the remote telephone exchange that accommodates the incoming subscriber.
It is commanded via the control information channel of the digital line 6-1.

Then, when the control device 14 of the remote station telephone exchange that accommodates the terminating subscriber C detects the response of the terminating subscriber C, it stops calling the terminating subscriber C and controls the master telephone exchange. PCM digital line 6 to device 10
The response information is reported via one control information channel. Upon receiving this response information, the control device 10 of the central office telephone exchange checks the station data memory 20 in which the type of PCM digital line connection method is registered, and the called subscriber C is the same remote station as the calling subscriber A. If it is accommodated in the remote station telephone exchange, the position of the PCM digital line 6-2 connecting the remote station telephone exchanges from the station data memory 20 is checked, and the PCM digital line 6 is connected.
-2, the unused call channel number is checked, and the control device 4 of the remote telephone exchange that accommodates the calling subscriber A and the called subscriber C are accommodated via the control information channel of the PCM digital line 6-1. Remote station telephone exchange controller 14
To control P by controlling the time division multiplexing circuits 3 and 13, respectively.
Command the setting of the communication path to the designated channel of the CM digital line.

The control unit 4 of the remote station telephone exchange is a PCM.
A call path via the digital line 6-2 is set to monitor the disconnection of the subscriber. When the calling subscriber A or the called subscriber C ends the call and disconnects, this is detected by the subscriber circuit 1 (11) and the concentrator circuit 2 (12).
Is reported to the control unit 4 (14) of the remote station telephone exchange via. The control circuit 4 (14) of the remote station telephone exchange reports the disconnection information to the control device 10 of the master station telephone exchange using the control information channel of the PCM digital line 6-1. Upon receiving the disconnection information, the control device 10 of the master station telephone exchange uses the control information channel of the PCM digital line 6-1 to control the remote station telephone exchange device 4 (1).
4) to release the channel channel of the PCM digital line 6-2. Upon receiving the command, the control unit 4 (14) of the remote station telephone exchange controls the time division multiplexing circuit 3 (13) of the remote station telephone exchange to release the communication channel of the PCM digital line 6-2. , The outgoing subscriber A and the incoming subscriber C are monitored for outgoing calls to prepare for the next call.

[0013]

As described above, according to the present invention, a telephone call of a subscriber accommodated in a remote station telephone exchange located in the same remote station is set up using a PCM digital line connecting the remote station telephone exchanges. Reduce the number of communication lines between the subscribers of the remote station telephone exchanges in the same remote station by reducing the number of PCM digital lines that connect the parent station telephone exchanges and the remote station telephone exchanges and the number of call path devices of the parent station telephone exchanges. Thus, it is possible to construct an economical remote station telephone exchange switching system.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a switching system of a remote station telephone exchange according to the present invention.

FIG. 2 is a block diagram showing an example of a conventional exchange system for a remote exchange.

[Explanation of symbols]

 A to D telephone subscribers 1,11 subscriber circuits 2,12 concentrator circuits 3,13 time division multiplexing circuits for remote station telephone exchanges 4,14 remote station telephone exchange control devices 5,15 PCM digital line control circuits 6-1 , 6-2 PCM digital line 7,17 PCM digital line control circuit 8,18 Time-division multiplexing circuit of master telephone exchange 9 Call path device 10 Control device of master telephone exchange 20 Station data memory

Claims (1)

Claims: 1. The type of PCM digital line connection method is registered in a remote station telephone switchboard that is connected to the parent station telephone switchboard by a PCM digital line and performs a switching operation under the control of the parent station telephone switchboard. The station data memory of the master station telephone exchange and the station data of the station data memory are analyzed at the time of call path setting, and the control device of the remote station telephone exchange is instructed to control the time division multiplexing circuit of the remote station telephone exchange. A remote station telephone exchange control device comprising: a control device for the main station telephone exchange; and a control device for the remote station telephone exchange that controls the time division multiplexing circuit of the remote station telephone exchange according to a command from the main station telephone exchange. Exchange method.