JPS62130050A - Diagnostic system while operating exchange subscriber circuit - Google Patents

Abstract

PURPOSE:To attain diagnosis at the time of operation without disturbing a call of a subscriber by intermitting the diagnosis when a call during the diagnosis is detected to restore the subscriber line to the state before the start of diagnosis. CONSTITUTION:A diagnostic device 11 is provided with a test use termination circuit terminating the subscriber line being led in, a test signal generating circuit and a scanning signal read circuit or the like so as to apply a channel test or the like by means of the loopback of the test signal and a scanning test. When a subscriber telephone set makes a call during the diagnosis, a call supervisory device 12 detects the call and informs it to a control device 13. When the device 13 receives the notice, the device 13 makes the device 11 intermit the diagnosis and throw changeover contacts 21a, 22a of a subscriber circuit 2a into the state before the start of diagnosis. A BORSCHT section 5a in the circuit 2a detects the call, it is informed to a common controller to start a conventional call processing. After the talking is finished and the absence of talking is confirmed again, the diagnosis by the device 11 is restarted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a system for diagnosing subscriber circuits installed in an exchange during operation, which is used for diagnosing subscriber circuits installed in an exchange after the exchange starts operating. It is something.

In a subscriber exchange IfA machine accommodating a conventional technical subscriber telephone, a subscriber circuit is installed in correspondence with the subscriber line between the call path switch or the cotton collecting device preceding the switch and the subscriber line.

Taking the case of a digital subscriber exchange as an example, this subscriber circuit includes communication path current supply (B), overvoltage protection (0),
Ringing tone transmission (R), monitoring (S), code decoding (C)
, 2-wire 4-wire conversion (H) and testing (T) (BOR3CIIT functions).

Conventionally, in order to diagnose a subscriber circuit represented by the 0R5CIIT function unit as described above, the ROR3 to be diagnosed is
The subscriber line is connected to the diagnostic equipment in front of the CHT function department (on the subscriber terminal side), and various diagnostic tests such as scanning signal verification and communication path testing are performed in this state.

Problems to be Solved by the Invention The conventional diagnosis method described above assumes that diagnosis is performed offline before the start of operation (sales) or in response to a request from a subscriber during operation.

Therefore, if you try to perform periodic diagnostics during operation for preventive maintenance, the subscriber line will be disconnected during the diagnostics, so there is a problem that you will not be able to make calls.

Means for Solving the Constituent Problems of the Invention The system for diagnosing the subscriber circuit during operation of the present invention, which solves the problems of the prior art described above, detects the subscriber circuit at a location before the part to be diagnosed in the subscriber circuit. a diagnostic device that pulls in the subscriber line and diagnoses the subscriber circuit; a call monitoring device that pulls in the subscriber line at a point further before the diagnostic pull-in point and monitors calls; After confirming that there is no call in progress, the diagnosis device starts diagnosis and the call monitoring device starts monitoring the call, and if the call monitoring device detects a call during this diagnosis, it interrupts the diagnosis by the diagnostic device and joins. # By including a control device that restores the line to the state before the start of diagnosis, the system is configured to enable diagnosis during operation without interfering with subscribers' calls.

Hereinafter, the operation of the present invention will be explained in detail together with examples.

Embodiment FIG. 1 is a block diagram showing an operational diagnosis system for a subscriber circuit according to an embodiment of the present invention, together with related parts of an exchange.

In the relevant parts of the exchange, ■a to In are subscriber lines;
2a to 2n are JJI's single-person circuits, which used to be concentrator switches to draw in the corresponding subscriber circuits.

The diagnostic system of this embodiment includes a diagnostic device 11, a call monitoring device 12, a control device 13, a diagnostic lead-in line 14, a call monitoring lead-in line 15, a scanning signal line 16, a test signal insertion/
It is equipped with extraction circuits 17a to 17n and a test signal line 18.

The diagnostic lead-in line 14 is represented by the diagnostic lead-in line 14a in the case of the subscriber circuit 2a, as shown in FIG.
The subscriber circuit 2a is connected to the subscriber circuit 2a by the switching contact 21a installed in front of the OR3CIIT unit 5a (on the subscriber telephone side).
is selectively connected to subscriber line 1a within the network. On the other hand, the call monitoring lead-in vA15 has a switching contact 22a installed further in front of the diagnostic lead-in point by the switching contact 21a, as similarly shown by the call monitoring lead-in line 15a.
is selectively connected to the subscriber line 1a within the subscriber circuit 2a.

The diagnostic equipment includes a test termination circuit for terminating the subscriber line that has been drawn in, a test signal generation circuit, a test No. 3 receiving circuit,
When diagnosing the subscriber circuit 2a during operation of the exchange, the control device 13, which performs lifting, scanning tests, call path tests by returning test signals, etc., of the scanning signal reading circuit, etc., first operates in the diagnostic device II. The status signal of the subscriber circuit 2a is read through the scanning signal line 16a by activating the scanning signal reading circuit of the subscriber circuit 2a.
The state of subscriber telephones accommodated in the system is detected.

When the control device 13 confirms that the subscriber telephone accommodated in the subscriber circuit 2a is not making a call, the control device 13 switches the switching contact 21
a to connect the subscriber line 1a and the diagnostic drop-in line 14a.
and causes the diagnostic device 11 to start diagnosing the subscriber circuit 2a. At the same time, the control device 1f13 activates the switching contact 22a to connect the subscriber line 1a and the call monitoring drop-in line 15a, and causes the call monitoring device 12 to start monitoring the call of the subscriber telephone.

When the diagnostic device 11 starts the diagnosis, it first puts the subscriber's line in a loop state using the test termination circuit, and detects a pseudo call due to this loop state from the B in the subscriber circuit 2a.
OI? A scanning signal reading circuit confirms whether or not the 5CHT section has performed the scanning correctly via the scanning signal line 16a.

Next, the diagnostic device 11 transmits the test signal from the built-in test signal generation circuit to the test signal line 18, the insertion section (IN) of the test signal insertion/extraction circuit 17a, and the ll0R5 of the subscriber circuit 2a.
CIIT function unit 5a, diagnostic lead-in 'fJA14 a
The built-in diagnostic line termination circuit loops this back through the diagnostic lead-in line 14a and the BOR of the subscriber circuit 2a.
5CIIT m converter 5a, test signal insertion/extraction circuit 17
The signal is received by the built-in test signal receiving circuit through the extraction unit (DR) of a and the test signal line 18, and various tests for diagnosis such as a return loop test to check the reception level, frequency, etc. are performed.

When the subscriber telephone makes a call during this diagnosis, the call monitoring device 12 detects this call (off-hook) and the control device 13 detects the call (off-hook).
Notify. When the control device 12 receives this notification of call detection, it causes the diagnostic device 11 to interrupt the diagnosis, and switches the switching contacts 21a and 22a to the state before starting the diagnosis.

The BOR3CIIT unit 5a in the subscriber circuit 2a detects the call and notifies the common control device side of the call, and normal call processing is started. In this way, calls that occur during diagnostics are also processed normally.

After this call ends and it is confirmed again that the call is not in progress, the above-mentioned diagnosis is restarted.

Effects of the Invention As explained in detail above, the subscriber circuit operational diagnosis system according to the present invention is a call originating system that monitors calls by connecting the subscriber line at a point further before the diagnostic input point. A monitoring device is installed, and when a call is detected during diagnosis, the diagnosis by the diagnostic device is interrupted and the subscriber's line is restored to the state before the diagnosis started, so the system does not interfere with the subscriber's ability to make calls. The effect is that diagnosis during operation can be performed.

Furthermore, in the diagnostic system of the present invention, since the control device is configured to confirm that the subscriber is not on the phone when starting the diagnosis, the control device is configured to confirm that the subscriber is not on the phone when starting the diagnosis. When a subscriber issues a command to start diagnosis, it is no longer necessary to confirm that the subscriber is not on the phone, allowing for quick and reliable diagnosis.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an operating diagnosis system for subscriber circuits of an exchange according to an embodiment of the present invention together with related parts of the exchange, and FIG. FIG. 2 is a block diagram showing the relationship between the subscriber circuit 2a and the drop-in line, as a representative example of the subscriber circuit 2a. 1a-1n...Subscriber line, 2a-2n...Subscriber circuit that draws in the corresponding subscriber circuit, 3...Line concentration switch, 1
1...Diagnostic device h÷, 12...Call monitoring device, 13...
Control device, 14...Diagnostic lead-in line, 15...Call monitoring lead-in line, 16...Scanning signal line, 17a to 17n
...Test signal insertion/extraction circuit, 18...Test signal line, 2
1a, 22a...Switching contacts.

Claims (1)

[Scope of Claims] A diagnostic device that diagnoses the subscriber circuit by connecting the subscriber line at a point closer to the subscriber terminal than the part to be diagnosed in the subscriber circuit; A call monitoring device connects the subscriber line to the subscriber terminal side and monitors calls; and after confirming that the subscriber terminal is not making a call, the diagnosis device performs diagnosis and the call monitoring device A control device that starts call monitoring and, when the call monitoring device detects a call during the diagnosis, interrupts the diagnosis by the diagnostic device and restores the subscriber line to the state before the start of the diagnosis. A system for diagnosing switching subscriber circuits during operation.