JPS612467A - Testing method of subscriber's circuit - Google Patents

Abstract

PURPOSE:To attain the quick detection and repair of troubles such as false connection and disconnection by automatically testing a subscriber's circuit in each connection of subscriber's termination. CONSTITUTION:A frame connector LFC is connected through the course of MKR-OR-LINK-CL-LFC and an LFP relay is actuated by the ground on the course. An LB relay is actuated by the operation of the LFP relay, so that a subscriber's circuit testing part TSTC is started. The TSTC actuates a TST relay at first, switches a subscriber idle/busy monitoring lead to the TSTC side and simultaneously cuts off an LRL relay operating circuit for opening the train of an originating register OR at a tst contact. Under said status, the false connection/disconnection of the subscriber's circuit is tested. After executing the test for a fixed period, the TST relay is restored and the test is ended. When the TST relay is restored at the end of the test, an LRL operating circuit is formed and the train of the originating register OR is opened. In said procedure, the C-line test of the subscriber's circuit can be attained at the connection of the subscriber's origination without exerting influence upon the number of existing equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for testing subscriber circuit crosstalk and disconnection in a crossbar exchange.

The conventional subscriber circuit testing method is automatic central testing equipment (AC
T-5UBLATE), subscriber frequency meter testing device (5
UNETTST) etc. have been realized. In these conventional systems, a maintenance person sets the subscriber number to be tested in advance, makes an incoming call connection using the set number, and connects to the subscriber circuit via a link to conduct the test. A method is used in which maintenance personnel periodically conduct tests over a certain period of time. Therefore, any faults such as cross-talk or disconnection of the C line of the subscriber circuit that occur before the periodic test are left unattended for a certain period of time. Additionally, temporary failures due to poor contact, etc. may be difficult to detect and may become latent. Furthermore, the subscriber circuit is connected to the subscriber via a distribution board, and there are many opportunities for wiring changes depending on the service order. For this reason, the cause of failure is high, the chH of the subscriber circuit.
If there is a crosstalk or disconnection problem, normal call monitoring will not be possible. This causes problems for subscribers regarding telephone services. In addition, in the conventional method, there is only one maintenance person.
There was also an operational problem in that the test could not be performed if the subscriber number to be tested was set, or even if the number was set, if the subscriber to be tested was busy.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the conventional subscriber circuit testing method and to provide an entire system that allows subscriber circuit testing to be performed very economically on existing switching equipment.

In order to achieve the above object, the present invention performs a common control device test when a subscriber makes an outgoing connection, and the test is performed by monitoring the subscriber idle busy monitor υ′-do when the frame connector of the main link is closed. Note that the subscriber circuit whose transmission register is opened during the test is not in a lockout state, and the subscriber's idle/busy monitoring circuit is connected to the ground, making normal monitoring impossible.

Therefore, suspending the transmission register during testing allows early detection and repair. Furthermore, since the transmission register is held on hold, a certain amount of test time can be secured without affecting the main sequence of the common control device. Therefore, the hold time of the common control device is the same as in the past, and the number of common control devices installed will not be affected when introducing the circuit saving circuit test.

The present invention will be explained below with reference to the drawings. FIG. 1 shows a relay system according to the present invention, where SUB is a subscriber, W is a subscriber circuit, and MET in LC is a subscriber frequency meter.

L is the relay, 4c is the relay contact, LFC is the 7 frame connector, the side is the common control device, LINK is the main link, OR is the outgoing register, "7'Jd output)?" is the link, Figure 1 shows the outgoing connection. takes place as follows: when the subscriber SUE picks up the handset, the subscriber circuit L(4
), the L relay is activated (the operating circuit is omitted in Figure c), and the common control unit side is activated in a generally known manner. The common control device MKR controls the main link LINK to connect and restore the first outgoing register OR and the subscriber circuit LC. Thereafter, one calling register OR receives and stores the telephone number dialed by the subscriber SUB. Upon completion of receiving and storing the dial, the first calling register OR activates the common control device MKR and transfers the received telephone number.

The common control device E[lambda] translates the received telephone number, performs outgoing route selection, and selects and acquires the corresponding free trunk TH-.

In parallel with this, the side of the common control device is the frame connector LF.
Ctl-controls and connects the subscriber circuit LC. When the connection is confirmed, the subscriber idle busy monitoring lead is switched to the subscriber circuit testing section. At the same time, the circuit for opening the transmission register OR train is disconnected. This makes it possible to test the subscriber's circuit at the time of outgoing connection. FIGS. 2 and 3 are a circuit diagram and an operation diagram showing one embodiment of the common control device MKR. In Figure 2, UP is a circuit that monitors one idle call of a subscriber, TST is a relay that operates during the test, and LRL
is the relay for opening the OR train, and rsrc is the subscriber circuit test section.

HM is LIIVKq) Holding electromagnet, txt, tr41
4 indicates a relay contact.

The test connection operation f will be described below using FIGS. 2 and 3. All connections with frame connector LFC MKR-OR=
This is done via LINK-LC-LFC, and the LFP relay is activated by the air on this route. When the LFP relay operates, the LB relay operates, and the subscriber circuit test section TSTC is activated. TSTC first activates the TST relay, and uses its contact point tit to monitor the subscriber's unoccupied 1-talk monitoring lead to T.
Switch to STC and at the same time disconnect the operating circuit of the ninth LRL relay, which opens the train of the transmission register OR, at the tzt contact. In this state, perform a cross-wire φ disconnection test on the subscriber circuit.The test is carried out for a certain period of time, and TST! The J series is restored and the test is completed. When the TST relay is restored at the end of the test,
The operating circuit of the LRL is formed and the train of the outgoing register OR is opened.

In addition, as a cross-wire/disconnection test method in the subscriber circuit testing department, there is a method of measuring all the voltages or currents and making a judgment.1
It is omitted in this explanation.

As described above, the method according to the present invention makes it possible to test the C line of a subscriber's circuit at the time of the subscriber's outgoing connection without affecting the number of existing equipment. As a result, subscriber circuit crosstalk and
Early detection and repair of disconnection faults is possible, and all subscriber troubles related to telephone services can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram according to the present invention, and FIG. 2 is a diagram of the relay system according to the present invention.
FIG. 3 is a circuit diagram showing one embodiment of the applied common control device, and FIG. 3 is an operational diagram of the common control device in FIG.

Claims (1)

[Claims] In an exchange that has a function of opening the calling register by the common control device when an outgoing connection is made, when conducting a test by drawing the C line in the subscriber circuit of the calling subscriber to the common control device, the common control device must: A subscriber circuit testing method characterized by suspending a transmission register.