JP2503635B2 - Subscriber line test system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a subscriber line test for measuring the resistance, capacitance, applied voltage, etc. of a subscriber line and confirming the normality of a subscriber's telephone. Regarding the system.

[Conventional technology]

FIG. 2 shows a conventional subscriber line test system for making various measurements on the subscriber line. The exchange main body 11 is connected to each subscriber circuit 13, 14 via a concentrator 12. A subscriber telephone set 16 is connected to the subscriber circuit 13 via a subscriber line 15. A subscriber line measuring device 17 is connected to the other subscriber line 14. The measurement result of the subscriber line measuring device 17 is supplied to the measuring terminal 21 through the metallic measuring line 19. On the measurement side where this measurement terminal 21 is arranged, the subscriber line test terminal
22 are located. The subscriber line test terminal 22 is connected to the subscriber line test terminal control device 23. The subscriber line test terminal control device 23 interfaces with the subscriber line test terminal 22 and the subscriber line measurement device control device 24. Subscriber line measuring device control device 24 is a trunk
It is adapted to be connected to the exchange main body 11 via 25.

In such a conventional subscriber line test system, when the subscriber line test terminal 22 instructs a subscriber line to be tested, the exchange main body 11 causes the subscriber circuit 13 of the corresponding subscriber line 15 to be tested.
And the subscriber line measuring device 17 for the test lead-in line 27
Connect with. In this state, the resistance of the corresponding subscriber line 15,
Various measurements of capacitance, applied voltage, etc. and confirmation of the normality of the subscriber's telephone set 16 are performed through the measurement terminal 21.

[Problems to be Solved by the Invention]

In such a conventional subscriber line test system, since the exchange main body 11 handles digital signals, the measurement data output from the subscriber line measurement device 17 is supplied to the measurement terminal 21 by the metallic measurement line 19. It has become so. Therefore, even if an attempt is made to measure the call level on the same route as when the subscriber line test is performed, this is impossible because the measurement line 19 does not pass through the exchange main body 11.

Therefore, an object of the present invention is to provide a subscriber line test system capable of measuring a call level on the same route as when performing a subscriber line test.

[Means for solving the problem]

In the present invention, (a) a test terminal for testing a subscriber line, (b) an exchange main body, (c) a subscriber telephone connected to the exchange main body through a concentrator, and (d) the same exchange. A subscriber line measuring device connected to the main body via a concentrator, and (e) a first line for transmitting the measurement result to the subscriber's telephone set by the subscriber line measuring device without passing through the exchange main body and the test trunk. Test path switching means for connecting either one of the second line connected to the exchange main body through the test trunk to the measurement terminal,
(F) A subscriber line test terminal for instructing the switching operation of the test path switching means, and (g) a caller attached in place of the subscriber telephone when the test path switching means connects the second line to the measurement terminal. And a subscriber line test system.

That is, in the present invention, by switching the subscriber line to the test path connected to the measurement terminal via the exchange main body,
Make it possible to measure the call level from the measurement terminal.

[Examples] Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 shows a subscriber line test apparatus in an embodiment of the present invention. In FIG. 1, the same parts as those in FIG. 2 are designated by the same reference numerals, and the description of these parts will be appropriately omitted.

In this subscriber line test system, a switching device 31 is arranged between the subscriber line test terminal control device 23 and the trunk 25 via terminals A and B. Also, a subscriber line measurement device
The other end of the metallic measuring line 32 connected to 17 is a switching device
The metallic measuring line 33 connected to the terminal C of 31 and to the remaining terminal D passes through the subscriber line test terminal controller 23 and is connected to the measuring terminal 21. 2 for switching device 31
Two relay contacts 34, 35 are arranged. The first relay contact 34 connects the two terminals A and B in the normal measurement mode in which the resistance, capacitance, applied voltage, etc. of the subscriber line are measured in the same manner as in the conventional case. At this time, the second relay contact 35 connects the two terminals C and D. On the other hand, in the call level measurement mode in which the call level is measured, these relay contacts move and the above-mentioned connection relationship disappears, and the two terminals B and D are connected instead. The switching control of the switching device 31 is performed by the key operation of the subscriber line test terminal 37.

That is, when the operator sets the subscriber line test terminal 37 to the normal measurement mode by key operation or the like and then instructs the subscriber line 15 to be tested, it is said that the conventional subscriber line test system described above was used. Similarly, various measurements of subscriber line resistance, capacitance, applied voltage, etc., and confirmation tests of the normality of subscriber telephones are performed. At this time, the measurement data sent from the subscriber line measuring device 17 is a metallic measurement line.
The terminal C of the switching device 31 is reached through 32. Then, it is sent from the terminal D to the measurement line 33 via the relay contact 35 and supplied to the measurement terminal 21.

On the other hand, a transmitter (not shown) instead of the subscriber telephone 16
When the operator sets the subscriber line test terminal 37 in the speech level measurement mode with the level meter (not shown) attached to the measurement terminal 21, the speech level loss is measured. At this time, the output of the transmitter is the subscriber line 1
5, the subscriber circuit 13, and the concentrator 12 respectively to reach the exchange main body 11, from which the switching device 31 via the trunk 25.
Is input to In the switching device 31, the output of the oscillator input to the terminal B is output from the terminal D and is supplied to the measurement terminal 21 via the measurement line 33. In this way, the speech level loss can be measured by the level meter connected to the measurement terminal 21.

〔The invention's effect〕

As described above, according to the present invention, the contact is switched so as to connect the subscriber line and the measurement terminal by operating the subscriber line test terminal. Therefore, when performing the subscriber line test via the exchange main body, It is possible to measure the call level loss on the same route, and from this measurement result, there is an effect that the level loss correction processing in the device between the subscriber line and the measurement terminal can be performed.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of a subscriber line test system in one embodiment of the present invention, and FIG. 2 is a system configuration diagram of a conventional subscriber line test system. 11 ... Exchanger body, 13 ... Subscriber circuit, 15 ... Subscriber line, 16 ... Subscriber telephone, 31 ... Switching device, 32, 33 ... Measuring line, 34, 35 ... Relay contact, 37 …… Subscriber line test terminal.

Claims (1)

(57) [Claims] 1. A test terminal for testing a subscriber line, an exchange main body, a subscriber telephone connected to the exchange main body through a concentrator, and also connected to the exchange main body through a concentrator. A subscriber line measuring device, a first line for transmitting a measurement result to the subscriber's telephone set by the subscriber line measuring device without passing through the exchange main body and a test trunk, and a connection with the exchange main body through a test trunk Test path switching means for connecting one of the second lines to the measurement terminal, a subscriber line test terminal for instructing switching operation of the test path switching means, and the test path switching means 2. A subscriber line test system, comprising: a transmitter attached in place of the subscriber's telephone when connecting two lines to the measurement terminal.