JP2917965B2 - Method for testing remote subscriber equipment in V5 communication line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to V5.1 or V5.1 defined by the European Electrical Standards Association (CEPT).
5.2 When the master station and the remote station subscriber unit are connected by a communication line, and the master station does not have a dedicated test interface device with the remote station subscriber unit, the master station side sets the remote station. The present invention relates to a test method using a voice channel used for a call to a subscriber device.

[0002]

2. Description of the Related Art Conventional testing methods between a master station and a remote station subscriber unit are disclosed in Japanese Patent Application Laid-Open Nos. 8-46688 and 1-264351. It is clearly stated that the connection is made by a line, but V5.1 or V5.
There is no report on a test method in a network that is connected using two communication methods and does not have a dedicated test interface device on the master station side.

[0003]

As described above, conventionally, the connection between the master station and the remote subscriber unit is V5.1 or V5.1.
5.2 When a communication line is used, a dedicated test interface is required especially for the master station side and the remote station subscriber equipment of different manufacturers, and a large number of test interfaces will be added in the future. This has hindered the simplification of remote devices.

When the master station and the remote station subscriber unit are connected to each other by using a V5.1 or V5.2 communication line, the remote station subscriber unit has a V5.1.
1 or any remote device as long as it conforms to the provisions of V5.2 can be connected. Can't test. Therefore, there is a problem that it is assumed that there is a device on the master station side that cannot be tested even if it has a unique test interface for the remote station subscriber device.

[0005] Also, since the V5.1 and V5.2 systems are in the early stages of diffusion, there is a possibility that a problem may arise in the variety of types of specifications of the test interface.

An object of the present invention is to provide a communication between a master station and a remote subscriber unit when the master station and the remote subscriber unit are connected by using a V5.1 or V5.2 communication line. An object of the present invention is to provide a test method that does not need to have a common test interface.

[0007]

When a test apparatus makes a call to a telephone number of a test section of a remote station subscriber unit under test and the remote station subscriber apparatus confirms that the call is to the telephone number of the test section, A voice channel originally used for a call is connected to a high-level data link control circuit using a time-division multiplex switch to form a high-level data link for testing,
Central control unit (hereinafter referred to as CP) for test equipment and remote station subscriber equipment
U)).

Thereafter, a test command and corresponding response data are transmitted and received via the high-level data link.

According to this method, a test can be performed without requiring a common interface device with a test device for a remote station subscriber device, particularly on the master station side.

[0010]

Next, an embodiment of the present invention will be described in detail with reference to FIG.

FIG. 1 is a connection diagram of a system to which the remote subscriber unit test method of the present invention is applied. The test apparatus 13 is connected to the test terminal 1 by a terminal connection line 14, and includes a terminal interface device 3, a central control device 2a, a high-level data link control circuit 4a, and a time division multiplex switch 5a.

The master station 7 is connected to the test apparatus 13 via a 2M digital line 6a, and is connected to the remote station subscriber unit 12 and the 2M digital line 6b.

The remote subscriber unit 12 is connected to the subscriber line 10.
a, 10b, the normal subscribers 11a, 11b, respectively.
It is assumed that it is connected to

The remote subscriber unit 12 is a central control unit 2
b, test circuit 8, high-level data link control circuit 4
b, a time division multiplex switch 5b, and subscriber circuits 9a and 9b.

Next, a method for testing a remote subscriber unit according to the present invention will be described in detail with reference to FIG.

The test apparatus 13 connected to the 2M digital line 6a from the master station 7 is connected in the same manner as the remote station subscriber apparatus 12 connected according to V5.1 or V5.2.

The test apparatus 13 is controlled from the test terminal 1 and
From the terminal interface circuit 3 via the terminal connection line 14, from the time division multiplex switch 5a via the high level data link control circuit 4a to the master station 7 from the 2M digital line 6a via the communication voice channel, and to the telephone number of the test unit 15 It is assumed that a call is made to the user.

In this case, the connection from the master station to the test apparatus 13 itself is the same as that of one of the remote station subscriber apparatuses.

Normally, the remote station subscriber unit 12 processes the call from the master station to the subscribers 11a and 11b through the subscriber circuits 9a and 9b and the subscriber lines 10a and 10b by the time division multiplex switch 5b. Do.

At the time of the test, when the remote station subscriber unit 12 confirms that the call has arrived at the telephone number of the test 15 from the master station 7 through the 2M digital line 6b, the voice channel originally used for the call is time-division multiplexed. The switch 5b connects to the high-level data link control circuit 4b, and the CPU 2b
Communication with After that, it becomes possible to transmit the test information from the test circuit 8 to the test device 13 side in response to the test command from the test device 13 using the communication line.

[0021]

As described above, the present invention has a high-level data link control circuit on the remote subscriber unit side,
By connecting via the high-level data link control circuit of the test equipment on the master station side, even if the master station and the remote subscriber unit use the V5.1 or V5.2 communication line, they can be connected within the master station. There is an effect that a test can be easily performed using a general voice channel without using a dedicated test interface device.

Further, as described above, simplification of the test method is required to use the voice channel used in the normal call.
Improvements in reliability and maintainability are expected, and there is an effect that it can be applied uniformly to various types of remote station subscriber devices to be introduced in large quantities in the future.

[Brief description of the drawings]

FIG. 1 is a system connection diagram to which a remote station subscriber unit test method of the present invention is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Test terminal 2a, 2b Central control unit (CPU) 3 Terminal interface device 4a, 4b High-level data link control circuit 5a, 5b Time division multiplex switch 6a, 6b 2M digital line 7 Master station 8 Test circuit 9a, 9b Subscriber circuit 10a, 10b subscriber line 11a, 11b subscriber 12 remote station subscriber device 13 test device 14 terminal connection line

Claims (2)

(57) [Claims] 1. C connected via a 2M digital line
Either a V5.1 or V5.2 communication line defined by the EPT as a trunk line, a master station and a remote station subscriber unit, and a master station test apparatus in a network connected between the master station and the master station test apparatus. A test high-level data link between the test unit of the remote station subscriber unit and the test apparatus of the master station via the 2M digital line at the start of the remote station subscriber unit test. Performing a step of receiving a test signal via the test high-level data link and transmitting a response signal to the test signal, and terminating the test from the test apparatus of the master station. Releasing a test connection by a signal. 2. The test high-level data link configuration is such that a specific telephone number is assigned to a test unit of a remote subscriber unit, and a high-level data link control circuit is transmitted from a test terminal of the test apparatus. The specific telephone number is called via the high-level data link control circuit of the remote unit when the remote subscriber unit is connected to the test circuit via the high-level data link control circuit of the test unit by the incoming call. 2. The remote station test method according to claim 1, wherein the method comprises: