JPS58165458A - Howler test system - Google Patents

Abstract

PURPOSE:To prevent complicated control, by controlling a subscriber line lead- in switch with turning-on of a switch to which a howler transmitter is connected, in addition with turning-on of two switches for normal test. CONSTITUTION:In testing a subscriber line, first a switch in a subscriber trunk SUB is operated to disconnect the line from a time division switch TDSW. The incoming side of the subscriber line lead-in switch ASW is connected to each SUB and the outgoing side is connected to each tester of subscriber lines LTU and a howler trunk HOWT. In each test of the subscriber lines, relays (a), (b) in the ASW are activated. In case of howler test, a relay is energized while the relays (a), (b) in the ASW are turned on. That is, subscribers listen to howler tone with duplicated connection. Further, the maintenance personnel listens to a howler back tone through the test device LTU of subscriber lines.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a howler test method for testing telephone exchanges and subscriber lines. 0 shows a configuration diagram of a sound transmission circuit. Conventionally, there has been an automatic howler transmission device for normal how-to sound transmission, and a separate howler transmission device for subscriber line testing. 2-The sending circuit was configured.

That is, there are two types of similar devices for different purposes, and either one is connected to the subscriber line via a subscriber line drop-in switch or a space switch.

There is considerable waste in the prior art.

An object of the present invention is to provide a howler test method that does not represent the waste of the above-mentioned conventional technology (there is also a howler sending circuit in the subscriber line test equipment) and does not make the control method too complicated.

During the how-to test, connect the subscriber line and the subscriber line testing device via the core subscriber line inlet switch, and then connect the subscriber line inlet switch 9, the automatic howler sending device, and the subscriber line testing device. Make a double connection.

That is, the howler sending device is normally connected to the subscriber line via the subscriber line inlet switch, but during the howler test, it is double connected via the subscriber line inlet switch as described above. In particular, since the automatic nowler transmitter can be used in two ways, normal and test, conventional how-to transmitter circuits in subscriber line test equipment are no longer required.

To control the subscriber line inlet switch, turn on one switch to which the subscriber is connected, turn on the other switch to which the subscriber line testing device is connected, and then turn on the switch to which the subscriber line testing device is connected. Dual connections can be made by simply turning on the other switch, without complicating control.

An embodiment of the present invention will be described using FIG. 3.
: Umbrella for testing subscriber lines, first subscriber transformer,,′.

The switch in SυBT is operated, and the time division switch T
Disconnect from D8W.

The input side of the subscriber line interchange switch A8W is connected to each 5UBT, and the output side is connected to each subscriber line testing device LTU.
The test is performed by turning on the relay ASB in the A8W at each test site of the subscriber line connected to the trunk HOWTK.

In the howler test, the subscriber can hear the howler sound by turning on the ttC relay with relay a%b in the ASW turned on, that is, making a double connection. can listen to the Nowrapack sound through the subscriber line testing equipment LTU. , It is no longer necessary to incorporate a howler transmission circuit in the subscriber test equipment LTUI as in the past.

As shown in Figure 3, there are n pieces of LT for one piece of ASW.
Assuming that U is connected, the number of howler sending circuits can be reduced by mXn sheets as A3Wm sheets.The subscriber line lead-in switch can be controlled by turning on two switches during normal testing, and also by turning on the howler sending device. Since all you have to do is turn on the other connected switch, the control is not complicated.

[Brief explanation of drawings]

Figures 1 and 2 show a conventional configuration diagram in which a 71-back sending device is built into a subscriber line testing device. Figure 3 shows a conventional system in which a 71-back sending device is required in a subscriber line testing device. FIG. 1...Subscriber 2...Space switch 3...Howler trunk 5...Subscriber line testing device 12...Howler sending circuit agent Patent Attorney Susuki 1) Toshiyuki

Claims (1)

[Claims] A subscriber on one side of the switch is fij! In the subscriber line testing method of nine telephone exchanges, which have a subscriber line switch connected to the subscriber line testing device and the automatic how-to sending device on the other side, the howler sending circuit for howler testing is tested on the subscriber line. When performing a howler test without being configured in the equipment, the subscriber line and the subscriber line testing device are connected via the subscriber line inlet switch, and the automatic howler sending device and the subscriber line are connected via the subscriber line inlet switch. A howler test method characterized by performing a howler test by connecting a wire test device at 23%.