JPS60120643A - Practical testing system of telephone exchange - Google Patents

Abstract

PURPOSE:To attain the test of an exchange depending on the practical operation by connecting a telephone set to an exchange to be tested normally and switching the connection to an exchange in operation as required so as to continue the exchange service at a fault of the exchange to be tested. CONSTITUTION:An extension telephone set 1 is connected to a private branch of exchange 8 in operation and an exchange to be tested via a line switching circuit 7. The line switching circuit 7 connects a line 11 to the exchange 9 to be tested via an interface circuit 3 by a changeover switch 2 normally (at test) and the exchange 9 to be tested is subject to the actual operating test through outgoing/incoming call of the extension 1. If the exchange 9 to be tested is faulty, an outgoing call to a station 10 or an incoming call from the station 10 takes place, the line switching device 7 switches the line 11 by using a switching controller 6 to the private branch of exchange 8 in operation and allows the exchange to execute the extension telephone set 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a testing method for telephone exchanges, more specifically,
Concerning a practical test method for telephone exchanges using practical telephone lines.

Conventionally, there have been two methods for practical testing of telephone exchanges: one method is to perform evaluation tests while actually performing exchange services, and the other is to conduct tests by connecting a test-specific telephone to the telephone exchange under test.

In the former case, even if a failure occurs, it is first necessary to continue the replacement service, so it is not possible to take sufficient time to identify the failure location, and it is not possible to conduct a satisfactory evaluation test.
Furthermore, since the device cannot be operated freely during exchange service, there is a problem in that it is not possible to collect detailed data on the operating status. The latter method had the disadvantage that it was difficult to conduct continuous evaluation tests because it required the use of telephones in exchange service, and the tests were different from actual operational evaluation tests.

The purpose of the present invention is to compensate for the above-mentioned drawbacks by providing an extension direct line switching device between an operating private branch telephone exchange and an extension telephone connected thereto.
To provide a practical test method for an α-talk switchboard in which the direct-talk switch under test is tested by instructing whether it is on the telephone exchange side, on the premises, or on the 5th switch side, and usually by connecting to the telephone exchange under test. There is a particular thing.

In order to achieve the above object, the 'direct telephone exchange practical test method according to the present invention is to provide 41 extensions to which the direct telephone exchange under test is connected between an in-operation private branch telephone exchange and an extension m jammer housed therein. Insert the telephone line switching device, and the extension line switching equipment is usually connected to the extension line filling machine! When a call is made from an extension telephone and a hooking signal is sent, the extension 15-phone is connected to the 1-talk exchange machine in the operating premises, and the call is terminated. When a call is detected, the extension 1α (number) is switched and connected to the test [Y] exchange Φ, and when there is an incoming call from the local language exchange/machine side, it is detected and the extension Ijt that should receive the call is connected. The extension line in operation is configured to connect the direct talk exchange machine side (jtt), and the extension line in operation is configured to test the direct talk exchange machine to be tested through the interconnection process of the filler.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 1 is a circuit block diagram showing an embodiment of a telephone exchange practical test method according to the present invention. An extension telephone line switching device f7 is provided between the extension telephone 1 and the private telephone exchange 8,
The structure is such that an extension telephone line 11 is connected to the direct line exchange 9 under test. Private branch exchange 8 is connected to local telephone exchange 10 by subscriber line 12. The extension direct line switching device 7 includes a line changeover switch 2, a line interface circuit 3, a changeover switch control circuit 4 that controls the line changeover switch 2, a line interface control circuit 5 that controls the line interface circuit 3, and their overall tlj. It consists of a switching control device 6 which controls the switching control device 6. FIG. 2 is a detailed diagram of the line interface circuit. In the figure, 13 is a relay for monitoring the status of the extension telephone line, and a is its relay contact. 14 is a loop coil, 15 is a ringer detection circuit, r
g is its relay contact.

In Figure @1, the switching control device 6 controls the line changeover switch 2 via the changeover switch control circuit 4, and in the normal state, the line control switch 2 is switched to the side of the α talk exchange 1 under test. . Therefore, the connection from an extension telephone, for example extension telephone +fiA, to extension telephone B takes place via a telephone exchange.

The connection from the extension machine A to the subscriber line 12 via the local telephone exchange 8 is as follows.

'When there is a call from telephone A and then hooking, the switching control device 6 switches the line switching switch 2? Switch to the local d-talk switch. The telephone exchange under test treats this as an abandonment because the extension telephone line has been switched. When the extension telephone line finishes the call and goes on-hook, the loop is closed and the status monitoring A relay operates and its contacts close, so the switching control device 11j-6 monitors the status monitoring A relay and detects the disconnection of the telephone under test 5I5. Switch to the switching device side.

Next, we will explain the case where there is an incoming call from the private telephone exchange side to extension telephone A.The ringer detection circuit 15 of the line interface circuit 3 operates and its contact rg closes, so the switch 11tlJ Incoming calls can be recognized via the line interface control circuit 5.As a result, the switching control device 6 switches the line changeover switch 2 to the private telephone exchange side.Under normal conditions, the extension telephone is connected to the telephone under test. It is possible to perform connection processing between extension telephones on the exchange side.

As described above in detail, the present invention is capable of newly installing an extension A line switching device between an operating private branch exchange and an extension B switch connected thereto, and connecting the extension A to 5 by operating the telephone. Indicates whether the telephone exchange is to be tested or a private branch exchange, and normally connected to the telephone exchange under test to actually provide call service, but if the direct telephone exchange under test is at fault, it can be replaced. Switching to the in-service private telephone exchange side has the effect of making it possible to sufficiently analyze the location of the failure.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram showing an embodiment of the telephone exchange practical test method according to the present invention, and FIG. 2 is a circuit diagram showing details of the line interface circuit of FIG. 1. 1... Extension telephone 2...Line selection switch 3...
・Line interface circuit 4... Changeover switch commercial 1 circuit 5... Line interface control circuit 6... Switching control device 7... Extension telephone line switching device W 8... Local language exchange 9... Tested 4-talk switchboard 3
0... Local language exchange (Iku) 11... Circle telephone line 1
2...Subscriber line 13...Status monitoring relay 14...
・Loop coil 15... Ringer detection circuit Patent applicant Nippon City Ichiki Co., Ltd. Iguchi Kawato Patent attorney I] Ro, Hatai 3.1 Figure 72

Claims (1)

[Claims] A private branch telephone exchange in operation and extension 4 housed within it
An extension line switching device to which the telephone exchange under test is connected is inserted between the telephone sets, and the extension telephone line switching equipment normally connects between the extension telephone and the telephone exchange under test. , when a call is made from an extension telephone and a hooking signal is sent, the extension telephone is connected to an operating telephone exchange, and when the end of the call is detected, the extension telephone call is transferred to the telephone exchange under test. When a call is received from the four private branch telephone exchanges, this is detected and an implicit connection is established between the extension telephone to receive the call and the private branch telephone exchange,
A telephone exchange practical test method characterized in that the telephone exchange under test is tested by 4"0 interconnection processing of extension telephones in operation.