JPS5868352A - Remote test system - Google Patents

Abstract

PURPOSE:To perform various tests and monitoring remotely even while an exchange is not in operation, or in abnormal operation, by providing the exchange with a fault detecting circuit and thus forming a by-pass for an exchange switch. CONSTITUTION:Once detecting a fault, a fault detecting circuit 5 sends switching indication information to a switching circuit 3, which performs switching operation to connect a trunk 2 to a testing device 4 not through an exchange switch 1, but a by-pass. In this case, the trunk 2 interrupts the acceptance of general calls to receive specific information from a maintenance center, etc., and specific information from a central controller 6. Consequently, various tests and monitoring are performed even while the exchange is not in operation or in abnormal operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote testing method for monitoring or testing an exchange from the outside via a general-purpose or dedicated trunk of the exchange.

Traditionally, general-purpose trunks or dedicated trunks are used to connect to test equipment via exchange switches.

When performing remote testing, various monitoring and tests are performed by connecting the trunk to the test equipment only when the exchange is in operation. However, if the exchange is out of operation or in an abnormal state and the exchange switch cannot be controlled, the test is performed. I couldn't do it.

The method of the present invention provides an abnormality detection circuit in the exchange, detects the above-mentioned non-operation or abnormal state, and directly connects the trunk and the test equipment without using an exchange switch. ! The above-mentioned drawback is improved by switching the connection so that it is connected.

When performing remote testing using a general-purpose trunk or a dedicated trunk (hereinafter simply referred to as trunk) of an exchange, since the interface with the outside is a trunk, it is necessary to connect the trunk and the test equipment via an exchange switch. was there. In this case, testing was necessarily conducted only while the exchange was in operation, and the test content was limited to various monitoring and tests during operation. In addition, when testing during non-operation, the test equipment was connected directly to the outside without going through trunks and exchange switches, and a test line was required separately from the trunk.

The system of the present invention is configured such that a circuit for detecting an abnormality in the exchange is provided, and when the exchange is not in operation or in abnormal operation, the test device and the trunk are directly connected to each other without an exchange switch, and when the exchange is in operation (the When the trunk is operable for general use, the trunk is operated at normal pressure, and when the call from outside is a general call, the call is received on an extension, etc., and when the call is from outside or a test call, the trunk is operated at normal pressure. As is well known, the trunk is shared so as to be connected to the test equipment, and a switching means is provided so that the trunk and the test equipment are directly connected without using the exchange switch as described above in the event of non-operation or abnormality. Ruru.

This makes it possible to carry out economical monitoring and testing even in the event of an abnormality in the exchange by using the trunk that is shared with general calls from outside.

Next, it will be explained in detail with reference to the drawings. In the figure, 1 is a replacement switch,
2 is a trunk, 5 is a switching circuit, 4 is a test device, 5 is an abnormality detection circuit for detecting an inoperation or an abnormal state of the exchange, 6 is a central control unit, and 7 is a bypass circuit.

If the trunk is used for general calls, switching circuit 3
is not operating, the trunk 2 is connected to the exchange switch via the switching circuit 5, and is connected to the extension etc. in exactly the same way as in the case where there is no switching circuit, so a detailed explanation will be omitted.

A case where a trunk is used for a test call will be explained. First, a description will be given of the operation during which exchange operation is possible.

Similar to the above, since the switching circuit is not operating, it is possible to connect to the exchange switch and receive incoming calls in the same way as for general calls.

As is well known, whether the call is a test call or not depends on whether the connected terminal is a test device or an extension terminal. The other is connected to an exchange switch or just like an incoming connection and
The test device 4 is connected to the trunk 2 via the inactive side of the switching circuit 6 and the exchange switch 1 . As for the test operation and the monitoring operation, a detailed description thereof will be omitted since signals are sent and received between the test equipment and the equipment at the external maintenance center, as in the past.

Next, we will discuss the case where the exchange is out of operation or in an abnormal state. The abnormality detection circuit 5 periodically generates calls to check whether or not the exchange is operating normally. In addition, when an abnormality is detected in the central control device 6, the abnormal state is detected by receiving abnormality information from the central control device 6.
Since this is the same as the known example, the description will be omitted.

When an abnormality is detected in the abnormality detection circuit 5, switching instruction information is sent to the switching circuit 3, and the switching circuit 6 becomes operational and the connection with the exchange switch side is changed to the bypass circuit side without going through the exchange switch. Can be switched. In the case of Jin, trunk 2 is connected to test equipment 4 via a bypass circuit, but 4 is configured not to accept general calls.
It operates when specific information is received from a maintenance center or the like, or when specific information is received from the central control device 6. After the bypass circuit is installed, there is no need to connect a replacement switch, and test operations can be performed even when the bypass circuit is not in operation or in an abnormal state. In particular, even in the case of an operational failure in the central control unit or exchange switch system, testing becomes possible, and powerful testing and various monitoring such as failure analysis and sending various types of failure information to a maintenance center etc. become possible.

As described above, according to the method of the present invention, it is possible to use a general-purpose trunk or a dedicated trunk that is shared with general calls from outside, and to perform various tests and monitoring even when the exchange is out of operation or in an abnormal operating state. Remote testing of the system (testing from an external maintenance center, etc.) can be performed more economically than before. Another specific exam time! There is no need to separately provide I.

[Brief explanation of drawings]

The figure is a relay system diagram showing one embodiment of the present invention. 1... Replacement switch 2... Trunk 5... Switching circuit 4... Test equipment 5-- Abnormality detection circuit
6...Central control unit 7-...Bypass circuit attorney Susuki 1) Toshiyuki

Claims (1)

[Claims] t. In a remote testing method in which switching equipment is monitored and tested from the outside via a general-purpose trunk or a dedicated trunk of the switching equipment, when the switching equipment is in operation, the testing equipment and the trunk are connected via a single exchange switch, and the failure of the single switching equipment is monitored and tested. Provide a means to detect when it is operating or abnormally operating,
A remote testing method characterized by comprising means for switching the test equipment and the trunk to be directly connected without using an exchange switch based on information from the means.