JPH0498957A - Subscriber circuit test system in exchange - Google Patents

Abstract

PURPOSE:To test both interface subscriber circuits with simple constitution by providing either of a U interface simulating terminal equipment or an S interface simulating terminal equipment to the system. CONSTITUTION:When a maintenance personnel enters a test request and a tested subscriber number by a test control terminal equipment 13, the inputted information is analyzed by a test controller 12. The controller 12 sends the tested subscriber number at first to a central processing unit 8. When the tested subscriber is a subscriber of a U interface, the central processing unit 8 activates a relay 2 and a relay 10 to connect a U interface subscriber circuit 3 and a U interface simulating terminal equipment 11. Similarly, when the tested subscriber is a subscriber of an S interface, the central processing unit 8 activates a relay 5 and the relay 10 to connect an S interface subscriber circuit 6 and an S interface simulating terminal equipment 14 via a 2/4-wire conversion circuit 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a maintenance and testing system for a digital exchange accommodating l5DN subscribers, and particularly for an exchange accommodating both an l5DN basic access U-interface subscriber circuit and an S-interface subscriber circuit. This invention relates to a test method for S-interface subscriber circuits and S-interface subscriber circuits.

Prior Art FIG. 3 is a block diagram showing an embodiment of a conventional subscriber circuit testing system in an exchange accommodating both S interface subscribers and S interface subscribers.

A two-wire interface subscriber line 1 is connected via a relay 2 to a U-interface subscriber circuit 3. The relay 2 normally connects the U interface subscriber line 1 and the U interface subscriber circuit 3, and when testing the U interface subscriber circuit 3, it connects the U interface pseudo terminal 11 and the U interface subscriber circuit 3. Connect via U interface drop-in wire.

Similarly, the 4-wire S interface subscriber line 4 is connected to the relay 5.
via an S-interface subscriber circuit 6. Relay 5 normally connects S interface subscriber line 4 and S
An interface subscriber circuit 6 is connected thereto, and when testing the S interface subscriber circuit 6, the S interface pseudo terminal 14 and the S interface subscriber circuit 6 are connected via an S interface drop-in line.

The U-interface subscriber circuit 3 and the S-interface subscriber circuit 6 are each connected to a switch 7.

A central processing unit 8 connected to the switch 7 and the test control device 12 controls the relays 2 and 5 based on the control of the switch 7 and requests from the test control device 12.

The test control terminal 13 is a man-machine interface used by maintenance personnel to test subscriber circuits, and is a test control device 1.
2 analyzes the test request input from the test control terminal 13, and notifies the central processing unit 8 of the subscriber number to be tested, or requests the pseudo terminal to perform tests such as pseudo calling and receiving calls. It is a device that controls the

The U-interface pseudo-terminal 11 and the S-interface pseudo-terminal 14 perform outgoing and incoming tests on the U-interface subscriber circuit 3 and the S-interface subscriber circuit 6, respectively.

Next, the operation when testing a subscriber circuit will be explained using FIG. 3. When a maintenance person inputs a test request, a subscriber number to be tested, etc. from the test control terminal 13, the input information is analyzed by the test control device 12.

The test control device 12 first sends the subscriber number to be tested to the central processing unit W8. If the subscriber under test is a U-interface subscriber, the central processing unit 8 operates the relay 2 to connect the U-interface subscriber circuit 3 and the U-interface pseudo terminal 11, and also connects the test control device 1
2, a signal indicating that the subscriber under test is a U-interface subscriber is sent.

When the U-interface subscriber circuit 3 and the U-interface pseudo-terminal 11 are connected and a signal indicating that the subscriber under test is a U-interface subscriber is received from the central processing unit 8, the test control device 12 connects the U-interface pseudo-terminal to the U-interface pseudo-terminal. 11, a test request such as outgoing or incoming call is made.

When the U-interface pseudo terminal 11 receives a test request from the test control device 12, it performs the requested test, tests the municipality of the U-interface subscriber circuit 3, and reports the results to the test control device 12. When the test control device 12 receives the test results from the U interface pseudo terminal]1, the test control device 12 displays the results on the test control terminal 13.

Similarly, if the subscriber number to be tested manually entered from the test control terminal 13 is an S interface subscriber, the central processing unit 8 operates the relay 5 and connects the S interface subscriber circuit 6 and the S interface pseudo terminal 14. At the same time, a signal indicating that the subscriber under test is an S interface subscriber is sent to the test control device 12.

When the S-interface subscriber circuit 6 and the S-interface pseudo-terminal 14 are connected and a signal indicating that the subscriber under test is an S-interface subscriber is received from the central processing unit 8, the test control device 12 connects the S-interface pseudo-terminal to the S-interface pseudo-terminal. 14, a test request such as outgoing or incoming call is made.

When the S-interface pseudo terminal 14 receives a test request from the test control device 12, it performs the requested test to test the normality of the S-interface subscriber circuit 6, and reports the result to the test control device 12. When the test control device 12 receives the test results from the S interface pseudo terminal 14, it displays the results on the test control terminal 13.

The above test method has a problem in that it requires both a U interface pseudo terminal and an S interface pseudo terminal. In addition, an inquiry is made to the test control device or the central processing unit that has subscriber information as to whether the subscriber under test is a U interface or an S interface.
There is a problem in that the procedure is complicated because a U interface pseudo terminal or an S interface pseudo terminal must be selected and tested depending on the result.

OBJECTS OF THE INVENTION An object of the present invention is to provide a subscriber circuit testing system for an exchange that simplifies the test procedure with a simple configuration using a single pseudo terminal.

According to the present invention, there is provided a test system for a subscriber circuit in an exchange that accommodates both a U-interface subscriber circuit and an S-interface subscriber circuit of an I5DN.
A U-interface pseudo-terminal for testing the interface subscriber circuit and the S-interface subscriber circuit, and a connection for connecting the U-interface subscriber circuit and the U-interface drop line in response to a subscriber circuit test instruction. connecting means for connecting the S-interface subscriber circuit and the S-interface drop line in response to the test instruction; and connecting means for connecting the U-interface pseudo terminal and the U-interface drop line;
There is obtained a subscriber circuit testing system characterized in that it includes a 2-wire/4-wire conversion circuit that connects the U-interface pseudo terminal and the S-interface drop-in line.

Further, according to the present invention, there is provided a system for testing subscriber circuits in an exchange that accommodates both U-interface subscriber circuits and S-interface subscriber circuits of an I5DN, comprising:
an S-interface pseudo-terminal that tests the U-interface subscriber circuit and the S-interface subscriber circuit; connecting means for connecting the S-interface subscriber circuit and the S-interface drop-in line, and connecting the S-interface pseudo-terminal and the S-interface drop-in line in response to the test instruction; There is obtained a subscriber circuit testing system characterized in that it includes a connecting means and a 4-wire 72-wire conversion circuit that connects the S interface pseudo terminal and the U interface drop-in line.

Example Next, the present invention will be explained with reference to FIG.

FIG. 1 is a block diagram showing one embodiment of the present invention,
Parts equivalent to those in FIG. 3 are designated by the same reference numerals.

A two-wire U-interface subscriber line 1 is connected via a relay 2 to a U-interface subscriber circuit 3 . The relay 2 normally connects the U interface subscriber line 1 and the U interface subscriber circuit 3, and when testing the U interface subscriber circuit 3, it connects the U interface pseudo terminal 11 and the U interface subscriber circuit 3. Connect via U interface bow wire.

Similarly, the 4-wire S interface subscriber line 4 is connected to the relay 5.
via an S-interface subscriber circuit 6. Relay 5 normally connects S interface subscriber line 4 and S
When testing the S interface subscriber circuit 6, the S interface subscriber circuit 6 and the 2-wire to 4-wire conversion circuit 9 are connected via the S interface drop-in line.

The U-interface subscriber circuit 3 and the S-interface subscriber circuit 6 are each connected to Switzerland 7. The central processing unit 8 connected to the switch 7 and the test control device 12 is connected to the control and test control device 12 of the Swiss-Sochi 7
Relay 2, relay 5, and relay 10 are controlled in response to a request from.

The test control terminal 13 is a man-machine interface for maintenance personnel to test subscriber circuits, and is a test control terminal 13.
2 analyzes the test request input from the test control terminal 13, notifies the central processing unit 8 of the subscriber number to be tested, and
This is a device that performs tests such as requesting tests such as pseudo call origination and call reception to the interface pseudo terminal 11.

The U-interface pseudo-terminal 11 provides the following information for the U-interface subscriber circuit 3 and the S-interface subscriber circuit 6:
Perform tests such as outgoing and incoming calls. The 2-wire to 4-wire conversion circuit 9 is connected to the S interface subscriber circuit 6 by the relay 5 when testing the S interface subscriber circuit 6, and converts the 4-wire S interface signal into the 2-wire U interface signal. Convert.

The relay 10 connects the U interface pseudo terminal 11 and the U interface subscriber circuit 3 via the relay 2 when testing the U interface subscriber circuit 3, and connects the U interface pseudo terminal 11 and the U interface subscriber circuit 3 when testing the S interface subscriber circuit 6. This is a relay for connecting the terminal 11 to the S interface subscriber circuit 6 via the 2-wire to 4-wire conversion circuit 9.

Next, the operation when testing a subscriber circuit will be explained using FIG. When a maintenance person inputs a test request, a subscriber number to be tested, etc. from the test control terminal 13, the input information is analyzed by the test control device 12. The test control device 12 first sends the subscriber number to be tested to the central processing unit W8.

If the subscriber under test is a subscriber of the U interface, the central processing unit 8 operates the relay 2 and the relay 10, and
The interface subscriber circuit 3 and the U interface pseudo terminal 11 are connected.

When the U-interface subscriber circuit 3 and the U-interface pseudo terminal 11 are connected, the test control device 12 requests the U-interface pseudo-terminal 11 to perform a test such as calling or receiving a call. When the U-interface pseudo terminal 11 receives a test request from the test control device 12, it performs the requested test to test the normality of the U-interface subscriber circuit 3, and reports the result to the test control device W12. Test control device 1
Upon receiving the test results from the U interface pseudo terminal 11, the test control terminal 2 displays the results on the test control terminal 13.

Similarly, if the subscriber number to be tested input from the test control terminal 13 is an S interface subscriber, the central processing unit 8 operates the relays 5 and 10, and connects the S interface subscriber circuit 6 to wire 2-4. S through the line conversion circuit 9
Connect to the interface pseudo terminal 14.

When the S interface subscriber circuit 6 and the S interface pseudo terminal 14 are connected via the 2-wire to 4-wire conversion circuit 9, the test control device 12 connects the U interface pseudo terminal 11
makes test requests such as outgoing or incoming calls. When the U interface pseudo terminal 11 receives a test request from the test control device 12, it performs the requested test, tests the normality of the S interface subscriber circuit 6, and reports the results to the test control device 12. When the test control device 12 receives the test results from the S interface pseudo terminal 14, it displays the results on the test control terminal 13.

FIG. 2 is a block diagram showing another embodiment of the present invention,
Parts equivalent to those in FIGS. 1 and 3 are indicated by the same reference numerals.

In this example, the difference from the configuration in FIG. 1 is that only an S interface pseudo terminal 14 is provided, and a relay 5, an S interface drop-in line, and a relay are provided between the S interface subscriber circuit 6 and this S interface pseudo terminal 14. 10
are connected via.

Further, the S interface pseudo terminal 14 and the U interface subscriber circuit 3 are connected via a relay 2, a U interface drop-in line, a 4-wire/2-wire conversion circuit 15, and a relay 10.

It is clear that by doing so, the same actions and effects as in FIG. 1 can be obtained.

Effects of the Invention As described above, according to the present invention, either one of the U interface pseudo terminal and the S interface pseudo terminal
If only the U interface pseudo terminal is provided, the subscriber test is performed on the S interface subscriber circuit via the 2-wire/4-wire conversion circuit, and if only the S interface pseudo terminal is provided, Since the subscriber test is performed on the U interface subscriber circuit via the 4-wire/2-wire conversion circuit, there is an effect that the test can be performed on both interface subscriber circuits with a simple configuration.

In addition, since the connection control between the pseudo terminal and the subscriber circuit is performed by the central processing unit that has subscriber information such as whether the subscriber under test is a U interface or an S interface, the test control equipment There is no need to adjust the subscriber's interface type, and the test procedure is simple.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional subscriber circuit testing system. Explanation of symbols of main parts 3...U interface subscriber circuit 6...
... S interface subscriber circuit 7 ... Switch 8 ... Central processing unit 9 ... 2-wire/4-wire conversion circuit 11 ... U interface pseudo terminal 12...
...Test control device 13...Test control terminal

Claims (2)

[Claims] (1) A test system for subscriber circuits in an exchange that accommodates both ISDN U-interface subscriber circuits and S-interface subscriber circuits, which tests the U-interface subscriber circuits and S-interface subscriber circuits. a U-interface pseudo-terminal for testing a subscriber circuit; a connection means for connecting the U-interface subscriber circuit and a U-interface drop-in line in response to a subscriber circuit test instruction; a connecting means for connecting a circuit and an S interface drop-in line; a connecting means for connecting the U interface pseudo terminal and the U interface drop line; and two wires for connecting the U interface pseudo terminal and the S interface drop line. /4-wire conversion circuit. (2) A test system for subscriber circuits in an exchange that accommodates both ISDN U-interface subscriber circuits and S-interface subscriber circuits, which tests the U-interface subscriber circuits and S-interface subscriber circuits. a connecting means for connecting the U interface subscriber circuit and the U interface drop-in line in response to a test instruction for the subscriber circuit; a connecting means for connecting a circuit and an S interface drop-in line; a connecting means for connecting the S interface pseudo terminal and the S interface drop line; and 4 wires for connecting the S interface pseudo terminal and the U interface drop line. 1. A subscriber circuit testing system comprising: a 2-wire conversion circuit.