JPS6359576B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fault acceptance and subscriber line testing system in a time division switching system.

Conventionally, in a space division type exchange, all connections between a subscriber's telephone and a subscriber line test stand operated by an operator are made on an analog basis. Therefore, a subscriber line testing machine that performs a subscriber line test on an analog basis is directly connected to the subscriber line test stand, and an operator can perform a subscriber line test on an analog basis after a fault is detected. On the other hand, in the case of the time-division switching system, since a time-division switch using a digital signal method is interposed between the subscriber line and the subscriber line test stand, the subscriber line is transferred directly to the subscriber line test stand on an analog basis. It has been difficult for an operator to connect a testing machine and conduct a subscriber line test similar to the subscriber line test in the space division method described above.

The purpose of the present invention is to solve the above-mentioned problems, that is, even in the time-division switching system, the operator can connect the communication path with the subscriber from the subscriber line test stand by the same operation as the subscriber line test in the space-division system after receiving a failure. This provides a failure reception/testing method that allows subscriber line testing to be performed while maintaining security.

The fault reception/test method of the present invention includes a subscriber line test stand for performing fault reception and subscriber line testing;
A function that executes subscriber line tests according to instructions sent from this subscriber line test stand via the time division switch and sends the results to the above subscriber line test stand via the time division switch. A slave-side subscriber line testing machine that has a communication function between the subscriber telephone set during the line test and the subscriber line test stand, and a fault reception trunk of the time division exchange and the subscriber line test according to instructions from the subscriber line test stand. and a master side subscriber line testing machine that controls the closure of the communication path with the subscriber line test stand, and after receiving a fault from the subscriber, the subscriber line testing machine continues the call with the subscriber and performs the subscriber line test. It is characterized by carrying out.

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

FIG. 1 is a block diagram of a time division exchange system showing one embodiment of the present invention. In Figure 1, there is a subscriber circuit LC that accommodates subscriber lines, a digital/analog conversion circuit DAC, and a failure reception trunk.
Several CPTs exist in a time-division exchange, but for the sake of clarity, the minimum number of CPTs is required to configure a communication path for receiving failures from one subscriber and performing subscriber line tests. I will only show the things. The subscriber line test stand LTC is a communication circuit,
Handset, dial circuit, subscriber line test instruction panel, test result display panel, modem, slave side subscriber test equipment LTE-S via communication path
It consists of a code conversion circuit for remote control and a code conversion circuit for displaying the test results sent from the slave side subscriber testing equipment via the communication path. Slave side subscriber test machine
LTE-S is a subscriber test circuit, a communication circuit, a modem, and a control circuit that controls the above circuits using codes for remote control sent from the subscriber test stand, and transmits the subscriber line test results via the communication path. It consists of a code conversion circuit for sending to the subscriber test stand LTC. Master side subscriber testing machine LTE−
M is composed of a circuit that controls the closure of paths between various trunks of the time division exchange, such as the fault reception trunk CPT and the subscriber test stand LTC, according to instructions from the operator from the subscriber test stand LTC. When an incoming call is received from the subscriber's telephone SUB, the incoming call is displayed on the subscriber test stand LTC and the path between the failure reception trunk CPT and the subscriber test stand LTC is established according to the operator's instructions from the subscriber test stand LTC. Close. time division switch TDSW,
The subscriber line concentrator switch LSW, subscriber circuit LC, digital/analog converter circuit DAC, and failure reception trunk CPT constitute a time division switching system, and when failure reception occurs, the communication path from the subscriber's telephone SUB to the subscriber test stand is When starting the subscriber test after closing PATH 1 and accepting the fault, the operator connects the subscriber line testing machine to the subscriber line to be tested by the hooking operation on the subscriber test stand LTC. Test call path PATH2
Close.

Next, the operation of the above embodiment will be explained in accordance with state transitions. First, the idle (IDLE) state refers to a state in which there is no incoming call on the failure reception trunk CPT of the time division switch. Call path PATH from subscriber's phone
When there is an incoming call to the failure reception trunk CPT via 1, and there is an incoming call display from the master side subscriber line testing machine LTE-M to the subscriber line testing stand, the operator sends the call from the subscriber line testing stand LTC to the master side subscriber line testing machine LTE-M. By instructing the line tester LTE-M to close the path between the failure acceptance trunk CPT and the subscriber line test stand LTC, the failure acceptance state is entered. After the failure is detected, the operator hooks the communication circuit of the subscriber line test stand, so that the time division switch maintains the path in the time division switch TDSW as it is.
Change the path of the subscriber line concentrator switch LSW from the call path PATH1 at the time of fault reception to the subscriber line test call path.
By switching to PATH2 and connecting the slave side subscriber line testing device LTE-S to the subscriber line to be tested, the subscriber line test state is entered. In this state, the operator remotely operates the slave side subscriber line tester LTE-S from the subscriber line test stand LTC to perform the subscriber line test. The test results are sent from the slave side subscriber line test machine LTE-S to the subscriber line test stand via the subscriber line test call path PATH2.
It is sent to LTC and displayed on the display panel. This allows the operator to send the test results to the subscriber line test channel.
This is communicated to the subscriber via PATH2, and the failure reception trunk CPT is set to a released state by the subscriber's or operator's on-hook, and the subscriber line test ends from a series of failure receptions.

As explained above, the present invention remotely controls a subscriber line test machine from a subscriber line test stand via a communication path of a time division exchange, and performs subscriber line testing in a time division exchange in the same way as in a space division exchange. can be made possible to carry out. Furthermore, after receiving a failure from a subscriber's telephone, the system can immediately proceed to a subscriber line test while maintaining the communication path between the subscriber and the operator, and has excellent effects in terms of improving service to the subscriber, such as being able to process the problem quickly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a time division switch illustrating an embodiment of the fault acceptance/test method of the present invention. LC...Subscriber circuit, LTE-S...Subscriber test equipment, LSW...Subscriber line concentrator switch, DAC
...Digital-to-analog conversion circuit, TDSW...
Time division switch, CPT...Failure reception trunk,
LTE-M...Main subscriber test stand, LTC...Subscriber line test stand.

Claims (1)

[Scope of Claims] 1. A subscriber line test stand for accepting faults and performing subscriber line tests; A slave-side subscriber having a function of executing a line test and sending the result to the above-mentioned subscriber line test stand via a time division switch, and a function of communicating between the subscriber telephone set undergoing the subscriber line test and the subscriber line test stand. a master-side subscriber line testing machine that controls the closure of the communication path between the failure acceptance trunk of the time division exchange and the subscriber line testing stand according to instructions from the subscriber line testing stand; A failure reception/testing method characterized in that, after receiving a failure from a subscriber, the subscriber line test stand continues to communicate with the subscriber and executes a subscriber line test.