JPS62206954A - Monitor system for talking of telephone line - Google Patents

Abstract

PURPOSE:To eliminate the need for any special circuit or wiring to lead a voice into a test stand and to prevent generation of noises at release in case of the leading-in by providing a line test stand having a line test stand voice converter to convert a monitored voice signal into sound and a talking monitor trunk in a time division exchange system. CONSTITUTION:When a maintenance personnel designates a trunk 8 to be tested by a line test stand data input/output device 2, the device 2 informs it to a program control processor 5. The processor 5 applies path connection from the trunk 8 to a talking monitor trunk 10 and the path connection from a trunk 9 to be tested being a talking party to the trunk 10. In this case, the talking path set between the trunks 8, 9 remains as it is and the path to the trunk 10 is in multiple connection in two-way. Both calls are connected to a line test stand voice converter 3 through the trunk 10 by the path from the trunks 8, 9 connected to the trunk 10 and converted into voice. Thus, no special circuit is required for the trunks 8, 9. No noise to the trunk to be tested is causd because of the said 2-way multiple connection.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone line call monitoring system for a time-division telephone exchange, and in particular, to a telephone line call monitoring system for a time-division telephone exchange. This relates to the method of monitoring.

[Conventional technology]

Traditionally, this type of telephone line call monitoring system consists of a special circuit installed in subscriber circuits and trunk circuits for introducing audio to the line test stand, and a special circuit installed in the subscriber circuit and trunk circuit to connect the line test stand to the line test stand. The designated subscriber and trunk calls were monitored from the line test stand using the installed voice drop-in line.

[Problem that the invention seeks to solve]

In the conventional telephone line monitoring system described above, it is necessary to install special circuits in all subscriber circuits and trunk circuits to bring audio to the line test stand.
Lines had to be run from all subscriber circuits and trunk circuits to the line test stand.

Furthermore, when a plurality of line test stands are installed, it is extremely difficult to simultaneously monitor calls for the same subscriber or trunk from different line test stands.

Furthermore, when relay circuits are used as voice lead-in circuits to the line test stand in the subscriber circuits and trunk circuits, there is a drawback that noise is likely to be generated when the line is connected to the line test stand and when the lead-in is released.

[Means for solving problems]

In order to eliminate such drawbacks, the present invention provides a call monitor l-rank for monitoring calls through a time division switch for subscriber circuits and trunk circuits, and a call monitor l-rank for converting the monitored voice signal into sound. The system includes a line test stand and a line test stand including a voice conversion device.

[Effect]

In the present invention, two-way multiple access is performed in a time division switch.

〔Example〕

An embodiment of a telephone line call monitoring system according to the present invention is shown in the figure. In the figure, 1 is a line test stand having a line test stand data input/output device 2 and a line test stand audio converter 3 for converting the monitored audio signal into sound, 4 is a data input/output controller, and 5 is a program. Control process
7, 6 is a time division network control device, 7 is a time division network as a time division exchange, 8.9 is a trunk under test, and 10 is for monitoring calls through the time division network 7 for subscriber circuits and trunk circuits. This is a call monitor trunk.

Next, the operation of the system having such a configuration will be explained. When the maintenance person specifies the trunk under test 8 on the line test stand data input/output device 2, the line test stand data input/output device 2 notifies the user through the data input/output controller 4 that the trunk under test 8 has been specified. The program control processor 5 is notified.

The program control processor 5 controls the time division network 7 through the time division network control device 6, and connects the trunk under test 8 to the bus connection of the call monitor trunk 10 and the trunk under test 9 which is the other party of the trunk under test 8. The communication monitor trunk 10 is connected to the bus. At this time, the call bus set between the trunk under test 8 and the trunk under test 9 remains as is, and the bus to the call monitor trunk 10 becomes a two-way multiple connection. A bus from the trunk under test 8 and the trunk under test 9 connected to the call monitor trunk 10 connects the calls between the two to the line test stand audio conversion device 3 through the call monitor trunk 10, and is converted into voice.

The important points here are that there is no special circuit in the circuits of the trunk under test 8 and the trunk under test 9, and that there is simply a bus connection from each trunk under test to the call monitor trunk 10, and that Since it is a two-way multiple connection in the network 7, the noise to the trunk under test 8 and the trunk under test 9 is at the point where it does not occur.

〔Effect of the invention〕

As explained above, the present invention enables two-way multiplex connection in a time-division network by connecting a line test stand to a call monitor trunk that receives voice signals from the subscriber under test or the trunk. There is no need to insert a special circuit into the subscriber circuit and the trunk circuit for leading to the line test stand, and there is an effect that there is no need to wire the line from the subscriber circuit and the trunk circuit to the line test stand.

Furthermore, since the connection is performed in two directions in a time-division network, there is an effect that no noise is generated at all.

Furthermore, even if multiple line test stands are installed, it is possible to simultaneously monitor calls of multiple subscribers or trunks under test, as well as monitor calls of the same subscriber or trunk under test. .

[Brief explanation of drawings]

The figure is a system diagram showing an embodiment of a telephone line call monitoring system according to the present invention. 1...Line test stand, 2...Line test stand data input/output device, 3...Line test stand audio conversion device, 4...
...Data input/output controller, 5...Program control processor, 6...Time division network control device, 7...Time division network, 8, 9...~Trunk under test, 10... ...Call monitor trunk.

Claims (1)

[Claims] In a telephone line call monitoring system for a time-division control telephone exchange, there is a call monitor trunk for monitoring subscriber circuits and trunk circuits through the time-division switch, and a line test for converting the monitored voice signal into sound. What is claimed is: 1. A telephone line call monitoring system comprising: a line test stand having a stand-alone audio conversion device;