JPS5840960A - Storing system of digital circuit - Google Patents

Abstract

PURPOSE:To eliminate the intervention of man power, to shorten the time required for switching of connection and to attain a unified process for both a change of a station data and the switching of connection, by constituting a digital circuit distributing board with an electronic switch and a switch control circuit. CONSTITUTION:A digital circuit main distributing board 3 is constituted with an electronic switch 31 and a switch control circuit 32 to store the digital circuit. A remote control is given to the switching of connection corresponding to the digital circuit and the switching of connection corresponding to the channel from a test board 6 and an exchange controller 8 and via the switch 31 and the circuit 32. At the same time, a connection link of a circuit to be tested is provided between the switch 31 and a tester. Thus the switching of connection is possible not only in response to a PCM circuit but in response to a channel.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a digital line (hereinafter referred to as P
This invention relates to a digital line accommodation system having a test access function and a line switching function for CM lines.

Conventionally, the PCM line termination device and the outside line side are connected by a U-LINK, and by pulling out this U-LINK, the termination device and the outside line are separated, allowing access to the outside line side or the termination device side at the time of color separation. is also possible.

It is also possible to monitor the line while the U-LINK is connected. Changing the accommodation of PCM lines requires manual connection work.

However, with PCM lines, only multiplexed pulse bow beams can be obtained, and in the case of tests, etc., separate measurement equipment and test equipment are used to restore the audio level.
I'll have to test it.

In addition, when it comes to changing connections of PCM lines, disadvantages such as the large line bundle, poor workability, and a lot of manual intervention have been identified.

The object of the present invention is to configure a digital distribution board (hereinafter referred to as DDF) with an electronic switch and a switch control circuit,
DDFtInstead of installing it between the conventional outer edge and the PCM termination device (DDFt), by installing it between the PCM termination device and the switch, digital It provides a line accommodation method.

The digital line accommodation method of the present invention consists of a digital line main distribution board with electronic switches and switch control circuits,
The electronic switch and switch control circuit remotely control the connection change for digital lines and the connection change for channels from the test bench and exchange control device, and also provide a connection link for the line under test between the electronic switch and the test equipment. It is characterized by having the following.

Next, the present invention will be explained with reference to the drawings.

The PCM circuit 1 is connected to a terminal device t (hereinafter referred to as DT) 1. DTI is a well-known frame synchronization circuit, unipolar-bipolar conversion circuit.

The L PCM signal generated from the 7-frame aligner signal detection and insertion circuit and the frame aligner detection and insertion circuit is input to the electronic switch (hereinafter referred to as DSW) 31 of the DDF 3 as a 30-channel multi-electrification video synchronized with the clock of the main exchange 2, and as a toss dream. . The output signal of this DSW 31 is connected to the time-division communication path of the main exchange 2 as a 30-channel multiplexed pit stream which is changed to correspond to channels or PCM lines by an electronic switch. DDF3 D8W31
The connection control is performed by the DDF3 electronic switch control device (hereinafter referred to as D
(referred to as 8W CTL) 32.

This DDF 3 further has a communication path and control signal connection ink 7A as an interface with the PCM line maintenance test equipment. The channel or PCM line under test is DDF8
D8W31 is used to insert and extract the 30-channel multiplexed Pittsudley Futjite test machine's time-division communication channel (hereinafter referred to as M
-LINK) 4 to the channel under test or PC.
nsw control link for controlling connection switching of M line
-CTL32 and test control processor (hereinafter TST)
(referred to as P).

During the PCM line test, the maintenance person is on the test stand (hereinafter referred to as C8L)
fiTsT-P5! by specifying the test content and the channel or PCM line under test from 6! D8WC of DDF3
Instructs TL32 to pull in.

The maintenance person is responsible for various service trunks in the test aircraft C3VT)7
By using t-, it is possible to test the line characteristics and function of the external 1iNjA and the main exchange side.

C in case of PCM line connection change after line test and line failure
It is possible to change the connection from the S L 6', and by creating a control link between the control device (CP) 8 of the main exchange 2 and the TST/P5, it is possible to perform automatic line tests and line IM connection changes from the main exchange. Remote control is possible.

In this way, DDF3 is connected to DSW31 and DSW-CTL3.
2 configuration, digital switch for testing.

By providing a connection link to the
This is possible not only for CM lines but also for channels. Furthermore, connection switching can be remotely controlled from %C3L6 or CP8, and line switching operations can be automatically performed in the event of a line failure, and the degree of freedom in connection combinations is improved. In addition, in the present invention, the DDFt is not installed between the conventional outside line and the PCM line termination device, but is installed between the PCM termination device and the exchange. Because it is uniquely determined by the clock, there is no loss of synchronization when changing line connections, and external 11KI&
Perform preventive maintenance tests without any impact.

As explained below, the present invention configures the DDF with an electronic switch and a switch control circuit, thereby eliminating the need for manual intervention during installation work, thereby reducing the time required for connection changes and unifying data changes and connection changes for two stations. processing becomes possible. Furthermore, in line test access, there is no need to test not only PCM line compatibility but also channel-by-channel tests using individual devices for each test item.

This has the effect of enabling testing and monitoring at the audio level.

[Brief explanation of the drawing]

The figure is a system diagram showing one embodiment of the present invention. 1: PCM line termination device (DT), 2: Exchange main body, 3
: Digital distribution board (DDF), 31: Electronic switch (DEW), 32; Electronic switch control device (DSWCT)
L), 4: Test equipment time division communication path (M-LINK),
5: Test equipment Bromo, Su (TST/P), 6: Test stand (
C8L), 7: Various service trunks (SvT), 8:
Control device (CP) of the main body of the exchange.

Claims (1)

[Claims] The digital recirculating main distribution board f- is configured with multiple electronic switch control circuits, and the electronic switch and switch control circuit remotely control the connection change for digital lines and the connection change for channels from the test bench and exchange control device. , a digital line accommodation system whose 4I characteristic is to have a connection between the electronic switch and the test equipment.