JPS6338359A - Test device for subscriber circuit of isdn exchange - Google Patents

Abstract

PURPOSE:To carry out a test of a subscriber circuit without interrupting the calls or the transmission of signal between a maintainer and a subscriber terminal to be tested, by providing a user network interface for each user and controlling a slave subscriber circuit test device through a master subscriber circuit test device via a D-channel. CONSTITUTION:This test device consists of a subscriber circuit test set 21, a master subscriber circuit test device 16, a slave subscriber circuit test device 9, digital subscriber circuits 61-63 which connect both test devices 16 and 9 to a time division switch 8 of an exchange, and a test switch 10 which connects the subscriber circuit to be tested to the device 9. Further, this device has a control part 20 which performs an overall control of this test device, and the device 9 controls a user network interface having communication with the user network interface of the device 16 as well as a data channel of said network interface. Thus it is possible to perform the test of each subscriber terminal through the set 21 without interrupting the calls or the transmission of signals between a maintainer and a subscriber terminal to be tested.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a maintenance testing device for an ISDN exchange, and more particularly to a subscriber line testing device.

[Conventional technology]

Conventionally, no method has been established for controlling the subscriber line testing device on the slave side of an ISDN exchange from the subscriber line testing device on the master side.

[Problem that the invention seeks to solve]

An object of the present invention is to provide an ISDN exchange system that allows testing of each subscriber terminal from a subscriber line test stand on the master side without interrupting calls or signal transmission between the maintenance personnel and the subscriber terminal under test. ``We provide I-line test equipment.

[Means for Solving the Problems] The subscriber line testing device for the 181)N exchange of the present invention includes a subscriber line test stand, a subscriber line test stand, and a first digital subscriber circuit that connects the exchange a master subscriber line testing device connected to the time division switch; a second slave subscriber line test device connected to the time division switch via a second digital circuit; a test switch in a third digital subscriber circuit connecting a test join right line to said slave subscriber line testing device; said master subscriber line testing device;
a subscriber line test stand control unit that controls the subscriber test stand, such as a user network interface that controls the i-channel and the data channel, and a data channel control unit that controls the data channel of the user network interface;
The slave subscriber line testing device has a control unit that controls the entire device, and the slave subscriber line testing device controls a user network interface that communicates with a user network interface of the master subscriber line testing device, and a data channel of the user network interface. A data channel signal control unit, a user network interface that communicates with an ISDN network terminal, a data channel signal control unit that controls the data channel of the user network interface, a measurement unit that performs test measurements, and a measurement unit that connects to a test circuit. It has a test switch that controls the test, and a control section that controls the entire device.

In this way, by notifying the switchboard of the number of the subscriber terminal under test from the subscriber line test stand during the test, it is possible to check whether the right line under test has joined the slave line or not. ! It is connected to the i@ line test equipment, and a test path is formed through the slave and master subscriber line test equipment, making it possible to perform tests using digital data without using voice band signals.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a subscriber line testing device for an ISDN exchange according to the present invention, and shows a circuit configuration when testing a subscriber terminal device.

The subscriber line test stand 21 is the master subscriber line test device 1
It is connected to the subscriber line test stand control unit 19 and the U interface 17 of 6. The master subscriber line testing device 17 also includes a D channel signal control section 18 that controls transmission and reception via the U interface 17, and a control section 20 that controls the entire device. The slave subscriber line test device 9 is connected to the time division switch 8 via the digital subscriber circuit 62 and is connected to the time division switch 8 via the digital subscriber circuit 62, or between the interface 12 and the network terminal 4. The U interface 11 that connects the two interfaces, the D channel signal control units 142 and 141 that control the respective twin interfaces 12 and 11, the measurement unit 13 that performs test measurements of the right line, the test switch 10, and the entire device. The telephone terminal 1 is connected to the network terminal 4 together with the ISDN terminal 3 via the terminal adapter 2.
The network terminal 4 is connected to the time division switch 8 via the access right line 22 and the digital subscriber circuit 63.

The joining right circuit a22 is also switched and connected by the test switch 7 of the digital subscriber circuit 61 to the test switch 10 of the slave subscriber line test stand @9 during testing.

Next, the operation of this embodiment will be explained for the case where each network terminal 4 is tested for each subscribed line.

The basic access for communication via the U-interface 12, 17.11 is through two voice channels B1°B2 and one D
- channel (data channel) is used. Therefore, during the test, No. 48 indicated by block 5 is transmitted and received between the test device 16.9 and the network terminal 4 of the subscriber under test. Now, when the maintenance person operates the subscriber line test stand 21 and sends out the number of the subscriber under test, the master subscriber line test device 16
The D-channel of the U-interface 17 activates the switch (not shown) and transmits the subscriber number under test according to the interface protocol. Therefore, the exchange
At the same time, the subscriber line 22 connected to the network terminal 4 specified by the subscriber number under test is connected to the slave subscriber line testing device 9 by the test switch 7 in the digital subscriber circuit 63, and the slave subscriber line test is performed. The digital subscriber circuit 62 to which the device 9 is connected activates the slave subscriber line test device 9 according to the U interface protocol, and the slave subscriber line test #A test device 9 and the master subscriber line test device 16 are connected to each other. A path is set on the time division switch 8. When a maintenance person performs a test operation on the subscriber line test stand 21, the D-di 1! of each master subscriber line test device 16! The channel signal control unit 18 is the U interface 1
Insert a control signal into the D-channel of 7. This control signal passes through the path on the time division switch 8 and arrives at the slave subscriber line test bag@9, and the slave subscriber line test device 9 receives the D-channel signal from the U interface 12 by the D-channel signal control unit 141. and test switch 10. based on the control signal carried on the D-channel. Tests can be performed using the measurement U interface 11. When the slave subscriber line testing equipment @9 receives the result information, it inserts it into the D-channel 17 of the U interface 12. The master joining line test equipment 16 receives this test result information sent through the path of the exchange through the U interface 1.
- extracted from the D-channel of the subscriber line test stand 17 and displayed on each subscriber line test stand 21 via the subscriber line test stand control section 19.

〔Effect of the invention〕

As explained above, the present invention connects a subscriber line test stand, a master subscriber line test device, a slave halo subscriber line test device, and a master and slave subscriber line test device to a time division switch of an exchange. It consists of a subscriber circuit and a test switch that connects the subscriber line under test to the slave subscriber line testing equipment during testing. By using the master subscriber line test equipment to control the slave subscriber line test equipment using the channel, there is no need for an audio band signal transmitting/receiving device, such as a modem/fi/MOOEM, and communication between the maintenance personnel and the subscriber terminal under test is possible. This has the effect of making it possible to conduct subscriber line tests without interrupting signal transmission.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a circuit configuration when a subscriber terminal device is tested using an embodiment of the subscriber line testing device for an X5DN exchange according to the present invention. 1...Telephone terminal, 2...Terminal adapter, 3...I
S DN terminal, 4...Network terminal, 5...Test signal channel block, 61-63...Digital subscriber circuit, 7, 10...Test switch, 8...Time division switch, 9 ...Slave subscriber tone line test equipment, 11.
...U interface with network terminal 4, 12.17...
- U interface with subscriber circuit 62.6+, 13
...Measurement unit, 141, 142.18...D-channel signal control unit, 15.20...Control unit, 16...Master subscriber line testing device, one...Subscriber line test stand control unit, 21... subscriber line test stand, 22... subscriber line;

Claims (1)

[Scope of Claim] A subscriber line testing device for an ISDN exchange, comprising: a subscriber line test stand; the subscriber line test stand; and a time division switch of the exchange via a first digital subscriber circuit. a master subscriber line testing device connected to the time division switch via a second digital subscriber circuit; and a slave subscriber line testing device connected to the time division switch via a second digital subscriber circuit; a test switch in a third digital subscriber circuit connected to a test device, the master subscriber line test device comprising a user network interface having a voice channel and a data channel; The slave subscriber line test device has a data channel signal control unit for controlling the subscriber line test stand, a subscriber line test stand control unit for controlling the subscriber line test stand, and a control unit for controlling the entire device, and the slave subscriber line test device a user network interface that communicates with the user network interface of the user network testing equipment, a data channel signal control unit that controls the data channel of the user network interface, a user network interface that communicates with the ISDN network terminal, and data of the user network interface. A subscriber of an ISDN exchange that has a data channel signal control section that controls the channel, a measurement section that performs test measurements, a test switch that connects the measurement section to the test circuit, and a control section that controls the entire device. Line testing equipment.