JPH0391349A - Speech quality measuring system for telephone exchange - Google Patents

Abstract

PURPOSE:To discover the deterioration in the speech quality by providing plural noise measuring equipments connecting to an exchange switch via an unique switch to measure noise of plural subscriber circuits of pseudo speech state simultaneously and automatically. CONSTITUTION:When a maintenance personnel gives a command of measuring noise of subscriber circuits 1, 2 from a terminal equipment 7 to a central control ler 4, the controller 4 checks the state of the circuits 1, 2 and controls the circuits 1, 2, an exchange switch 3 and switches 8, 9 when the both are idle. As a result, both between the circuit 1 and a noise measuring equipment 5 and between the circuit 2 and a noise measuring equipment 6 are brought into a pseudo speech state. Then the equipment 4 issues a command to the equipments 5, 6 to make a report of measured result, and displays it on a termi nal equipment 7 or prints out on a printer 10 that the introduction of noise in the circuits 1, 2 when the result of reported measurement is worse than the reference value. Then the measurement for plural subscribers is implemented simultaneously to find out the deterioration in the speech quality early and the noise production is coped with without deterioration of service to subscribers.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for measuring call quality in a communication network, and in particular,
This invention relates to a speech quality measurement method for telephone exchanges that measures noise generated in subscriber circuits of telephone exchanges at terminal stations.

[Prior Art] A conventional method for measuring noise generated in a subscriber circuit of a telephone exchange tlA device at a terminal station will be explained with reference to FIG.

The maintenance person instructs the central controller 13 from the terminal 11 to measure the noise for each subscription #112. In response to this,
The central control unit 13 instructs the subscriber circuit 12 to switch the switch 14 to the contact 15fl1m, and the terminal 1
1 displays a message that preparations are complete. After that, the maintenance person connects an external measuring device to the jack 16 and measures the noise.

After the measurement is completed, the maintenance person instructs the central controller 13 from the terminal 11 that the noise measurement of the subscriber circuit 12 has been completed.

In response to this, the central controller 13 instructs the subscriber circuit 12 to switch the switch 14 to the contact 17 open position.

In conventional noise measurement methods, the above-described operations are performed on the subscriber circuit to be measured.

[Problems to be Solved by the Invention] In the conventional method for measuring noise generated in subscriber circuits of terminal telephone exchanges, maintenance personnel specify and measure subscriber circuits one by one, so it is difficult to It takes time to measure subscriber circuits, and it is difficult to detect the occurrence of noise early. For this reason, there is a high possibility that the occurrence of noise will not be discovered until a complaint is received from the subscriber, resulting in a disadvantage that the service to the subscriber will be degraded.

Furthermore, when measuring a slave subscriber circuit installed in a remote location, a maintenance person must be located at such a remote location. However, in reality, it is not possible to station a maintenance person in such a remote location due to economical reasons, so there is a possibility that the occurrence of noise cannot be detected even in this case.

[Means for Solving the Problems] An object of the present invention is to solve the problems of the prior art described above, and to provide a telephone exchange that can simultaneously and automatically measure the noise of subscriber circuits in a plurality of simulated call states. The purpose of the present invention is to provide a method for measuring call quality.

The present invention provides a speech quality measurement method for a telephone exchange having an exchange switch and a plurality of subscriber circuits connected to the exchange switch, including a plurality of noise measurement devices connected to the exchange switch via a unique switch; A means for controlling the unique switches of a plurality of noise measuring devices and measuring the noise of each by connecting to a predetermined subscriber circuit, and a means for outputting the measurement results of the plurality of noise measuring devices as visual information. It is characterized by having the following.

[Example] Next, a speech quality measurement method for a telephone exchange according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a speech quality measurement method for a telephone exchange according to the present invention.

The subscriber circuit 1 and the subscriber circuit 2 installed at a remote location are:
It is connected to the exchange switch 3. The replacement switch 3 is
The replacement operation is performed under the control of the central control device 4. The noise measurement device 5.6 constantly measures noise, and reports the measurement results to the central control device 4 according to instructions from the central control device 4.

Next, the operation of the telephone exchange speech quality measuring system of the present invention will be explained.

The maintenance person inputs a command from the terminal 7, that is, a command to the central control unit 4 to measure the noise of the subscriber circuit 1 and the subscriber circuit 2.
give instructions to The central control device 4 connects subscriber port #11.
Check the status of 2 and if both are "empty", control the subscriber circuit 1.2, exchange switch 3 and switch 8.9,
Both the subscriber port #Il and the noise measuring device 5 and the subscriber circuit 2 and the noise measuring device 6 are placed in a pseudo communication state.

Next, the central control device 4 performs the following on the noise measurement bag W5.6:
Instruct them to report their measurement results. If the measurement result reported by the noise measurement device 5.6 is worse than the reference value, the central control device 4 displays on the terminal 7 and/or the printer 10 that noise is occurring in the subscriber circuit 1.2. print out.

Next, the central control device 4 controls the subscriber circuit 1.2, the exchange switch 3, and the switch 8.9, and between the subscriber circuit 1 and the noise measurement device 5 and between the subscriber circuit 2 and the noise measurement device 6. restore the pseudo call state.

[Effects of the Invention] As explained above, the present invention automatically measures the noise of the subscriber circuit, measures the noise of the subscriber circuit of the slave station at the terminal station through an exchange switch, and By simultaneously measuring multiple subscriber circuits, it is possible to detect deterioration in communication quality at an early stage, and it is possible to deal with noise generation without degrading service to subscribers.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a speech quality measurement method for a telephone exchange according to the present invention. FIG. 2 is a block diagram of a conventional speech quality measurement method. ■, 2.12...Subscriber circuit 3.18...Exchange switch 4.13...Central control unit 5.6...Noise measuring device

Claims (1)

[Claims] A speech quality measurement method for a telephone exchange having an exchange switch and a plurality of subscriber circuits connected to the exchange switch, comprising: a plurality of noise measurements connected to the exchange switch via its own switch. a means for controlling the unique switches of the plurality of noise measuring devices and measuring the noise of each by connecting with a predetermined subscriber circuit, and converting the measurement results of the plurality of noise measuring devices into visible information. 1. A method for measuring speech quality of a telephone exchange, characterized in that it simultaneously and automatically measures the noise of a plurality of subscriber circuits in pseudo call states.