JPS63263871A - Highway energizing test system - Google Patents

Abstract

PURPOSE:To detect the abnormality of the subscriber circuit of an on-hook condition and a trouble during the call by providing a data loopback circuit at a subscriber circuit, and providing a collating circuit at a subscriber circuit signal distributing circuit. CONSTITUTION:A subscriber circuit signal distributing circuit 14 sends a control signal to a subscriber circuit control highway 16. A signal multiplexing separating circuit 3 sends the control signal to respective subscriber circuits 10a-10n. The circuits 10a-10n are operated by the control signal to input. Simultaneously, data loopback circuits 11a-11n insert and loopback 5 bits out of 8 bits of the control signal to the time slot of a supervising signal highway 12. The looped back data are separated from the highway 12, pass through a loopback data highway 13 and are inputted to a collating circuit 15 in the circuit 14. A supervising bit passes through a concentration switch 5, inputs to a supervising circuit 6 and supervises. The collating circuit 15 collates the control signal and the loopback data and confirms the normality of the highway.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a highway continuity test method for detecting abnormalities in subscriber circuits and failures during calls.

[Conventional technology]

FIG. 3 is a block diagram showing a conventional highway continuity test method. In the figure, 1a to 1n are subscriber telephones, 2a to 2n are subscriber circuits, 3 is a signal multiplexing/demultiplexing circuit, and 4 is a 16KSCN circuit shown in the fourth port.
(100 yen coin monitoring).

A supervisory signal highway to which a supervisory signal consisting of 3 bits of TSCN (terminal monitoring) and LSCN (call supervisory) and 5 vacant time slots is sent; 5 is a concentrator switch;
6 is the monitoring signal 16KSCN (100 yen coin monitoring), T
A monitoring circuit that monitors the 3 bits of SCN (call termination monitoring) and LSCN (call origination monitoring), T is a central processing unit, and 8 is a control circuit for this central control unit 7 that sends F subscriber circuit control data to the subscriber circuit. The subscriber circuit signal distribution circuit 9 shown in FIG.
This is the subscriber circuit control highway to which the control signal shown in a) is sent.Next, the operation of the highway continuity concession system with the above configuration will be explained. First, when a call is made from the subscriber telephone 1a, for example, the central processing unit 7 responds to a command from the F subscriber circuit 2.
a is in the co-opic folding state. ``Concentration switch 5''
A continuity test is performed between the down highway from the subscriber circuit and the up highway from the subscriber circuit.Next, the control signal shown in FIG. 4(a) from the subscriber circuit signal distribution circuit 8 is added to the command from the central processing unit 7. The subscriber circuit control highway 9t is sent to the subscriber circuit 2a. - 10,000, a monitoring signal indicating the status of the subscriber circuit 2a is sent to the monitoring circuit 6 through the monitoring signal highway 4 and the concentrator switch 5.

Therefore, the night circuit 6 can monitor three bits: 16KSCN (100 yen coin monitor), TSCN (death monitor), and LSCN (call monitor).

[Two problems solved by the invention]

The conventional highway continuity test method described above tests only the subscriber's phone that makes a call, and is not monitored while the call is in progress, making it impossible to detect abnormalities in the subscriber's circuit when it is on-hook or failures during a call. There are drawbacks.

[Means for solving problems]

The highway continuity test method of the present invention sends a subscriber circuit control signal from the subscriber circuit signal distribution circuit to the signal multiplexing/separating circuit via the subscriber circuit control signal highway, and this signal multiplexing/separating circuit The control signal is separated and output to each subscriber circuit, and the F loopback data is looped back to the loopback circuit in this subscriber circuit and output to the supervisory signal highway, and this loopback data and subscriber circuit control are The signal is compared with the subscriber circuit signal distribution circuit's verification circuit for testing.

[For production]

Since the present invention can monitor the subscriber while the subscriber is on the phone, it is also possible to detect abnormalities in the subscriber's circuit in the on-hook state and failures during the call.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a highway continuity test method according to the present invention. In the same figure, 10a~
10nFi subscriber circuits each having loopback circuits *11a to lln for loopbacking subscriber circuit control data, 12 a monitoring signal highway shown in FIG. 2(b), 13 a loopback data highway, and 14 loopback data and control data. A subscriber circuit signal distribution circuit which includes a verification circuit 15 for collation and sends 19 subscriber circuit control data to the subscriber circuit under control from the central processing unit T; 16 is a connection circuit for sending control signals as shown in FIG. 2(a); This is the circuit control signal highway.

Note that the control signal shown in Fig. 2 has an 8-bit configuration in which one time slot consists of SD6 to SDO and FO, and the second
The monitoring signal shown in figure Φ) is the return data SD6 to SD2.
Work monitoring bits 16KSCN, TSCN.

This is an 8-bit configuration of LSCN. \Next, the operation of the highway continuity test method with the above configuration will be explained. First, in response to a command from the central processing unit T, the F subscriber circuit signal distribution circuit 14 sends a control signal to the subscriber circuit control highway 18.

Therefore, the signal multiplexing/separating circuit 3 separates this control signal and sends the signal to each subscriber circuit 10a to Ion. To ensure this, each of the subscriber circuits 10a-10,n operates in response to an input control signal. At the same time, the data folding circuits 11a to 11n receive 5 of the 8 bits of the control signal.
Pitsu) (SD2-5D6) Th monitoring signal highway 1
2 timeslot and wrap around, so:
The return data is separated from the supervisory signal highway 12, passes through the return data highway 13, and is inputted to the matching circuit 15 in the subscriber circuit signal distribution circuit 14. On the other hand, the monitoring pit passes through the line concentration switch 5 and is input to the monitoring circuit 6 for monitoring. The verification circuit 15 verifies the control signal and the return data to confirm the normality of the highway, and notifies the central processing unit 7 if there is any abnormality.

[Effects of the Invention] As explained above in detail, if the highway continuity test method according to the present invention is implemented, it is possible to always check whether the control signal is normally received by the subscriber circuit and the normality of the supervisory signal highway. Since it is possible to monitor people, it has the advantage of being able to provide reliable services.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the highway continuity test scissors system according to the present invention, and FIG. Figure 3 is a block diagram showing a conventional highway continuity test system, and Figures 4(a) and 4(a) and 4(a) and 4(a) and 4(a) and 4(b), respectively) are diagrams showing the bit configurations of the control signal and monitoring signal in FIG. 3, respectively. 1a to 1n: subscriber telephone, 3: signal multiplexing
Separation circuit, 5...Concentration switch, 6...Monitoring circuit, 7...Central processing unit, 8...Subscriber circuit signal distribution circuit, 10a-10n...Subscriber circuit , 11
a to 11n... number/return circuit, 12... supervisory signal no way, 13... salary/return data highway, 14... subscriber circuit signal distribution circuit, 15...
- Verification circuit, 16...Subscriber circuit control signal No. 1 way.

Claims (1)

[Claims] It is equipped with a subscriber circuit equipped with a loopback circuit that loops back subscriber control data, and a verification circuit that collates the subscriber circuit control data with the loopback data, and transmits the subscriber circuit control data to the subscriber circuit under control from the central processing unit. A subscriber circuit signal distribution circuit for transmitting a signal, a supervisory signal highway for transmitting a supervisory signal to a concentrator switch, a return data highway for returning return data within this supervisory signal highway to a subscriber circuit signal distribution circuit, and a subscriber circuit signal distribution circuit for transmitting a supervisory signal to a concentrator switch. A highway continuity test method comprising: a subscriber circuit control signal highway for sending circuit control data to the subscriber circuit.