JPS61182396A - System for constituting exclusive channel for remote station - Google Patents

Abstract

PURPOSE:To form fast and stable maintenance function by setting a channel independently of exchange processing between a master station and a remote station so as to attain talking between maintenance personnels of the master station and the remote station even if a fault causing hindrance in the general exchange processing takes place at the master station or the remote station. CONSTITUTION:A frame 14 consists of 24 voice channels in the channel arrangement of a multiplex digital transmission line 11A, exclusive channels 15A, 15B are assigned to the channel 1 and the remaining 23 channels are assigned to general channels 16A, 16B. The general channels 16A, 16B are used to accommodate remote station subscribers 13A, 13B to a master station exchange time division channel 1 and the exclusive channels 15A, 15B are used for talking between transmitters 8A, 8B and receivers 9A, 9B.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a system for configuring a dedicated communication path for a remote station, particularly for a system for configuring a dedicated communication path between a master exchange and a remote exchange in a switching system having a remote exchange. It is.

(Prior art) Conventionally, in a system consisting of a master exchange and a remote exchange that is connected to the master exchange by a multiplexed digital transmission path and performs switching processing under the control of the master exchange, the multiplexed digital transmission path All of the communication channels were used as general communication lines, and calls between the master station and the remote station always required exchange processing at the base station and the remote station.

(Problems to be Solved by the Invention) Therefore, if a failure occurs in the remote exchange or the master exchange that interferes with general exchange processing, calls between the master exchange and the remote exchange will be routed through the exchange system. However, there was a problem that the system fell into an impossible state.

The above drawbacks are solved by providing a dedicated channel on the connected multiplex digital transmission path and a means to enable communication between the master station and the remote station without going through exchange processing, and it has a stable security function. The object of the present invention is to provide a method for configuring a communication path dedicated to a remote station.

(Structure of the Invention) According to the present invention, in a system comprising a master exchange and a remote exchange connected to the master exchange via a multiplexed digital transmission line and performing switching processing under the control of the master exchange, the multiplexed digital A dedicated channel is provided in the transmission path, and an extraction circuit for extracting the signal on the dedicated channel from the multiplexed digital transmission path in both the master station and the remote exchange equipment, and a signal inserted into the dedicated channel on the multiplexed digital transmission path. The extraction circuit is equipped with a receiver that converts the extracted signal into an analog voice, and the insertion circuit is equipped with a transmitter that converts the analog voice into a digital signal. A communication path configuration system exclusively for remote stations is obtained, which is characterized in that a communication path unrelated to exchange processing is set up between the two terminals.

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

FIG. 1 is a block diagram showing an embodiment of the present invention. The master exchange device 17 has multiplexed digital transmission lines 11A, LI
A digital line interface device 10A for interfacing with B.

10B, and a multiplexing circuit 4A for multiplexing and demultiplexing IIA and IIB, a demultiplexing circuit 5A, and a master exchange time division communication path I, and a multiplexing digital transmission path 11A.
, IIB (transmitter 8A, receiver 9A).

It is configured to include a D/A converter 7A, an insertion circuit 2A, and an extraction circuit 3A.

The remote exchange device 18 includes digital line interface devices 10C and IO for interfacing with multiplexed digital transmission lines 11A and IIB connected to the master exchange.
D, and a multiplexing circuit 4B for demultiplexing IIA and IIB, a demultiplexing circuit 5B, and a remote station subscriber 13A.
, 13B;
Furthermore, a transmitter 8 is connected to the multiplexed digital transmission line 11A and IIB.
B. A/D converter 6 for access from receiver 9B
B, a D/A converter 7B, an insertion circuit 2B, and an extraction circuit 3B.

In FIG. 1, the voice emitted from the transmitter 8A of the master exchange device 17 is digitized by the A/D converter 6A, inserted into the multiplex transmission line by two insertion circuits, and multiplexed by the separation circuit 5A. digital transmission lines 11A, 1l
After being separated into Be signals, they are transmitted through digital line interface equipment 10A to a particular dedicated channel on one of the multiplexed digital transmission paths 11A.

11A to the remote office exchange device 18 is passed through the digital line interface device 10C and multiplexed by the multiplexing circuit 48. After that, the dedicated channel is extracted by the extraction circuit 38, and the voice is sent to the D/A converter 7B. The signal is converted into an analog sound by the receiver 9B, and is emitted as voice by the receiver 9B.

Conversely, the voice generated from the transmitter 8B of the remote station 18 is also transmitted to the receiver 9A of the master exchange apparatus 17 by the same means.

FIG. 2 shows a multiplexed digital transmission line 11 in this embodiment.
The channel arrangement of A is shown. In the figure, one frame 14
is composed of 24 audio channels, and in this embodiment, channel 1 is divided into dedicated channels 15A and 15B, and the remaining 23 channels are general channels 16A and 15B.
It is divided into 16B.

In FIG.
However, as mentioned above, the transmitters 8A and 8B and the receiver 9A in FIG.
, 9B.

(Effects of the Invention) The present invention enables maintenance personnel between the master station and the remote station to communicate with each other even when a failure that impedes general exchange processing occurs at the master station or remote station, and provides a fast and stable maintenance function. It is effective to provide.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a channel arrangement diagram on a multiplexed digital transmission path in the embodiment of FIG. l... Master exchange time division communication path, 2A, 2B.
...Insertion circuit, 3A, 3B...Extraction circuit, 4A, 1B...Multiplexing circuit, 5A, 5
B...Separation circuit, 6A, 6B...A
/D converter, 7A, 7B...D/A converter, 8
A, 8B...Transmitter, 9A, 9B...
Handset, IOA, 10B, IOc, IOD...
Digital line interface equipment, IIA. ttf3...Multiplexed digital transmission line, 12.
...Remote office switch concentrator, 13A, 13B...
...Remote station subscriber, 14...l frame,
L5A, 15B...°Dedicated channel, 16A, 1
6B...General channel, 17...Main exchange equipment, 18...Group/remote exchange equipment. Agent Patent Attorney Susumu Uchihara ■1 Tenth 21st fJ

Claims (1)

[Claims] In a system consisting of a master exchange and a remote exchange that is connected to the master exchange by a multiplexed digital transmission line and performs switching processing under the control of the master exchange, a dedicated channel is provided in the multiplexed digital transmission line to An extraction circuit for extracting the signal on the dedicated channel from the multiplexed digital transmission path and an insertion circuit for inserting the signal into the dedicated channel on the multiplexed digital transmission path are provided in both the central office and remote office exchange equipment, and the extraction circuit is equipped with a receiver that converts the extracted signal into analog audio, and the insertion circuit is equipped with a transmitter that converts the analog audio into digital signals, allowing calls between the master station and the remote station that are unrelated to the exchange process. A method for configuring a communication path exclusively for remote stations, which is characterized by setting up a communication path.