JP2560361B2 - Subscriber line test method - Google Patents

Description

The present invention relates to a subscriber line test system, and more particularly to a subscriber line test system for automatically setting a balanced circuit network of subscriber circuits.

[Conventional technology]

Conventionally, the measurement of the AC impedance of the subscriber circuit is not included in the items of the subscriber line test. Therefore, the balanced circuit network in the subscriber circuit can be set by keyboard input based on the result of the AC impedance measured by the maintenance person every time each subscriber line is installed or switched, or based on the line specifications included in the subscriber data. I was going.

[Problems to be solved by the invention]

Since the conventional subscriber line test method described above does not include the measurement of the AC impedance of the subscriber line, the setting of the balanced circuit network is the result of the AC impedance measured by the maintenance personnel or the line included in the subscriber data. It is necessary to input by keyboard according to the specifications of the above, and in the case of switching the line, since the change content is input each time, there is a high possibility that an input error will occur due to an erroneous operation or carelessness. Further, since the subscriber line construction person and the exchange side maintenance person are different, it cannot be said that the change of the subscriber data based on the construction of the subscriber line is not always performed without delay.

The object of the present invention is to automatically measure the AC impedance of the subscriber line whenever the maintenance person conducts the subscriber line test, and also to set the balanced network in the subscriber circuit by instructing the central controller. It is to provide a subscriber line test method that is automatically performed in.

[Means for solving problems]

The subscriber line test system of the present invention is a subscriber line test device installed in the same place as a switching device and a subscriber circuit that sets one of a plurality of balanced circuit networks in response to a command from a central controller. And a subscriber line test method using a subscriber line test terminal block installed in a place different from the switching device, an impedance measuring device for measuring the AC impedance of the subscriber line is used as the subscriber line test device. connection,
The subscriber line test device is connected from the subscriber line test terminal block, performs a characteristic test of the subscriber line, and connects the impedance measuring device to the subscriber line when the subscriber line test terminal block is restored due to the termination. The AC impedance is measured and the measurement result is sent to the central control unit, and the central control unit determines the optimum balanced circuit network from the measurement result of the AC impedance and stores it as subscriber data, and at the same time, the AC of all subscribers. It is configured to issue a command for setting an optimum balanced circuit network to the subscriber circuit via the subscriber control device at the first call or call reception after the impedance measurement.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an electronic exchange to which an embodiment of the present invention is applied.

A subscriber line consisting of the subscriber 1, the subscriber line 2 and the subscriber circuit 3 is connected to the speech path device 4. The subscriber line test device 5 is connected to the call line device 4 via the subscriber circuit 6.
And the subscriber circuit 3 and the impedance measuring device 8 are connected via the test lead-in line 7. The subscriber line test terminal block 9 installed independently of the switching equipment is a trunk.
It is connected to the communication path device 4 via 10. Further, a push-button dial signal transmitter / receiver 11 for sending a test instruction to the subscriber line test device 5 and receiving the impedance measurement result, and a central control device 12 for controlling the entire switching device are included in the communication path device 4 Connected to. Further, the subscriber line controller 13 is a subscriber circuit 3 and 6 and a central controller 12
And connected to.

 Next, the operation will be described.

The maintenance person operates the subscriber line test terminal block 9 to activate the trunk 10. When the central control unit 12 knows that the activation is from the subscriber line test terminal block 9, it connects the subscriber line test unit 5 to the trunk 10 via the subscriber circuit 6.
The subscriber line test terminal block 9 performs a series of test operations such as various measurements of the resistance, voltage, capacity, etc. of the subscriber line, ringing function test, and howler sound test. The tester of the subscriber line test terminal block 9 performs a recovery operation upon completion of the test. The central controller 12
When the restoration of the subscriber line test terminal block 9 is known, the subscriber circuit 6
From trunk 10 to push button dial signal transmitter / receiver 11. Next, a push button dial signal is sent from the subscriber line test terminal block 9 to send a signal instructing the completion of the test and the measurement of the AC impedance of the subscriber line. The subscriber line test device 5 measures the AC impedance of the subscriber line under test using the impedance measuring device 8 according to the instruction. The measurement result is sent from the subscriber line test device 5 in the form of a push button dial signal and received by the push button dial signal transmitter / receiver 11. The received measurement result is sent to the central control unit 12 and stored as subscriber data. An example of the content of the data is whether the impedance of the subscriber line belongs to capacitive, resistive, or inductive.

The central controller 12 restores all test equipment upon completion of the test.

Next, the central control unit 12 confirms the subscriber data of the subscriber when a call originating from the subscriber or an incoming call to the subscriber occurs, and after setting the balanced impedance network after performing the AC impedance measurement. If not, specify the optimum balanced circuit network according to the contents of the data and issue a command to switch.
The command is issued via the subscriber circuit controller 13. At the same time, the set data is recorded in the subscriber data. This established record will continue until the next time the subscriber makes a measurement of the AC impedance.

〔The invention's effect〕

As described above, according to the present invention, when the maintenance person conducts the subscriber line test, the AC impedance of the subscriber line can be automatically measured at all times, and the setting of the balanced network in the subscriber circuit can be centrally controlled. This has the effect that it can be automatically performed according to the command of the device, and that there is no trouble caused by an erroneous operation, an input error due to carelessness, or a communication error between the construction worker and the maintenance worker.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic exchange to which an embodiment of the present invention is applied. 1 ... subscriber, 2 ... subscriber line, 3 ... subscriber circuit,
4 ... Call path device, 5 ... Subscriber line test device, 6 ...
Subscriber circuit, 7 ... Test line, 8 ... Impedance measuring device, 9 ... Subscriber line test terminal block, 10 ... Trunk, 11 ... Pushbutton dial signal transmitter / receiver, 12 ...
… Central control unit, 13 …… Subscriber circuit control unit.

Claims (1)

(57) [Claims] 1. A subscriber circuit for setting one of a plurality of balanced circuit networks in response to a command from a central control unit, a subscriber line test device installed in the same place as a switching device, and the switching device. In a subscriber line test method using a subscriber line test terminal block installed independently of the above, an impedance measuring device for measuring the AC impedance of the subscriber line is connected to the subscriber line test device, and the subscriber line testing device is connected. The line test device is connected to the subscriber line test terminal block through a switching device, and under the control of the subscriber line test terminal characteristic test is performed.
When the subscriber line test terminal block is restored due to the end of the characteristic test, the impedance measuring device is connected to the subscriber line to measure the AC impedance, and the measurement result is sent to the central control unit. The optimum balanced circuit network is determined from the impedance measurement results and stored as subscriber data, and at the time of the first call or call after the AC impedance measurement of all subscribers, the subscriber circuit controller is used to A subscriber line test method characterized by issuing an instruction to set an optimum balanced circuit network for the subscriber circuit.