JPH04361458A - Subscriber line testing system - Google Patents

Abstract

PURPOSE:To implement pseudo call or pseudo incoming call test by having only to revise an interface conversion circuit of a subscriber line accommodation device even when a new line attribute takes place in a subscriber line accommodated in the subscriber line accommodation device. CONSTITUTION:An exchange side of a subscriber line accommodated in a subscriber line accommodation device 1 is connected to an interface conversion circuit 30 via a test drawing relay 2 and a testing drawing link 4. The interface conversion circuit 30 connects the drawn subscriber line to a subscriber circuit 31 whose attribute is coincident with the line attribute via a subscriber line selection relay 33. Moreover, the subscriber line is connected to a testing trunk 11 of a line testing device 10 testing the line via a testing trunk termination circuit 32. The line testing device 10 is connected to a line testing board 13 implementing the input output of the information for the line test via a test control circuit 12, and the line testing board 13 accesses the subscriber line drawn via the interface conversion circuit 30.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber line testing method used for simulated calling/receiving tests on subscriber lines connected to exchanges.

0002

[Prior Art] Conventionally, this type of test was carried out by preparing real terminals for each subscriber line attribute, connecting each real terminal to the line under test, and manually making and receiving calls. .

Alternatively, as shown in FIG. 2, a line testing device 16 for testing a line has a plurality of test trunks 11 with different line attributes, and test start information from a line test stand 13 is sent to a test control device 15. and is transmitted to the central control unit of the exchange via a communication path 21 to the central control unit of the exchange.

[0004] The central control unit of the exchange analyzes the received test activation information and establishes a communication path 21 to the central control unit of the exchange.
The line attribute information of the line under test is sent back to the test control device 15 via. Based on the attribute information of the line under test, the test control device 15 drives the test trunk selection relay 14 corresponding to the test trunk 11 with matching line attributes.

The central control unit of the exchange also connects the subscriber line accommodation equipment control processor 7 via the exchange control link transmission/reception port 6 in the subscriber accommodation equipment 9 via the multiplex communication path 20 to the exchange. Send a line test command to. Based on this command, the subscriber line accommodation device control processor 7 drives the test lead-in relay 2 corresponding to the line under test.

[0006] As described above, the line test stand 13 performs a pseudo call origination or pseudo call termination test as a pseudo subscriber terminal.

[0007]

SUMMARY OF THE INVENTION In the conventional subscriber line testing method described above, it is necessary to prepare a real terminal for each line attribute of the line under test, which is uneconomical. Furthermore, it is necessary to change the connection every time the terminal is changed or the line under test is changed, which is complicated and inefficient.

In the conventional subscriber line testing method shown in FIG. 2, each time a new line attribute is added, a test trunk corresponding to the new line attribute must be added in the line testing equipment. Furthermore, there was a drawback in that the test control device and the central control device of the exchange had to be changed accordingly.

An object of the present invention is to provide a subscriber line testing system that allows pseudo-originating or pseudo-terminating tests to be performed by simply changing the interface conversion circuit of the subscriber line accommodation device even if new line attributes are added. Our goal is to provide the following.

0010

[Means for Solving the Problems] The subscriber line testing system of the present invention includes a lead-in means for drawing the exchange side of the subscriber line into a subscriber line accommodating means connected to the exchange and accommodating the subscriber line, and a line and an interface converting means for converting an interface with the subscriber line drawn in by the drawing means, the line testing means includes a test trunk interfacing with the interface means, and a line testing means. a line test stand that inputs and outputs information for the test trunk; and a test control device that controls the transmission and reception of information between the test trunk and the line test stand; It is configured to connect to the subscriber line as a pseudo subscriber terminal via an interface conversion means, and the interface conversion means:
A plurality of subscriber circuits that differ according to subscriber line attributes, a subscriber circuit selection relay for connecting the lead-in means to the subscriber circuit, and a test trunk termination circuit that interfaces with the line test means. It is the composition.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

Referring to FIG. 1 showing an embodiment of the present invention, a subscriber line accommodation device 1 accommodating subscribers 22 and 23 includes:
A test drop-in relay 2 for pulling in the subscriber line, a subscriber termination circuit 3 for terminating the subscriber line, and an interface conversion circuit 3 for connecting the subscriber line drawn by the test drop-in relay 2.
0, a demultiplexing circuit 5 that multiplexes signals from the subscriber termination circuit 3 or separates signals from the multiplexed communication path interface 8, and an exchange that transmits and receives control information on the exchange side. a control link transmitting/receiving port 6, a subscriber line accommodation control processor 7 that controls the demultiplexing circuit 5 and the exchange control link transmitting/receiving port 6, an interface conversion circuit 30, and a multiplexer that interfaces with the multiplexed communication path 20 to the exchange. A communication channel interface 8 is provided.

The interface conversion circuit 30 converts subscriber line attributes such as ISDNU interface or ISDNU interface.
A plurality of different subscriber circuits 31 such as SDN S/T interfaces or analog telephone interfaces,
It includes a subscriber circuit selection relay 33 that connects the test lead-in link 4 to the subscriber circuit 31, and a test trunk termination circuit 32 that interfaces with the line testing device 10.

Further, the subscriber accommodation device 1 is connected to the exchange via a multiplex communication path 20 to the exchange and to the line testing device 10 via a test trunk termination circuit 32, respectively.

The line test equipment 10 includes a test trunk 11 that interfaces with a test trunk termination circuit 32, a line test stand 13 that inputs and outputs information for line testing, and an information exchange between the line test stand 13 and the test trunk 11. It also includes a test control device 12 that controls the transmission and reception of information between the line test stand 13 and the central control device of the exchange.

The line testing device 10 is connected to the subscriber line accommodation device 1 via a test trunk 11 and to the central control unit of the exchange via a communication path 21 to the central control unit of the exchange.

Next, a method of testing from the subscriber line connected to the subscriber 22 will be explained.

When the subscriber number of the line under test or the device identification number of the subscriber termination circuit 3 is input from the line test stand 13, the test control device 12 transmits this input information to the central control device of the exchange. via line 21 to the central control unit of the exchange. The central controller of the exchange is connected to the subscriber line accommodation control processor 7 via the exchange control link transmit/receive port 6 via the multiplexed communication path 20 to the exchange.
to operate the test lead-in relay 2 of the line under test.

The subscriber line accommodation device control processor 7 operates the test lead-in relay 2 of the line under test, and
The subscriber circuit selection relay 33 corresponding to the subscriber circuit 31 matching the line attribute of the line under test is activated. Thereafter, the subscriber line accommodation control processor 7 notifies the central control unit of the exchange via the exchange control link transmission/reception port 6 and the multiplexed communication path 20 to the exchange that the connection has been completed. Submit information.

The central control device of the exchange transfers this connection completion information to the test control device 12 via the communication path 21 to the central control device of the exchange, and the test control device 12 transfers it to the line test stand 13. A message indicating that the connection has been completed is displayed on the line test stand 13.

In this manner, the line test stand 13 includes the test control device 12, the test trunk 11, and the test trunk termination circuit 3.
2. It is connected to the subscriber termination circuit 3 through the subscriber circuit 31 and the test lead-in link 4, and can serve as a pseudo terminal in place of the subscriber 22, changing the test control device and the central control device of the exchange. An outgoing test or an incoming call test can be performed from the line test stand 13 without having to do so.

After the outgoing test or the incoming call test is completed, the line test stand 13 sends a message indicating the end of the test to the subscriber line accommodation equipment control processor 7 via the central control unit of the exchange, in the same way as when the test line is installed. The subscriber line accommodation device control processor 7 then activates the test lead-in relay 2 and the subscriber circuit selection relay 33, disconnects the subscriber termination circuit 3 and the subscriber circuit 31, and disconnects the subscriber circuit 31 from the test lead-in relay 2 and the subscriber circuit selection relay 33. relay 2
is switched to the subscriber 22 side, and the subscriber termination circuit 3 and subscriber 2
Connect 2.

[0023]

As explained above, the present invention connects the exchange side of the subscriber line accommodated in the subscriber line accommodation means to the interface conversion means via the lead-in means, and the interface conversion means connects the switch side of the subscriber line accommodated in the subscriber line accommodation means to the The subscriber line that has been received is connected to a subscriber circuit that matches the line attribute, and is further connected to the line testing means via the test trunk termination circuit, and the line testing means terminates the line via the test trunk and the test control device. Since the subscriber line is accessed from the line test stand by connecting it to the test stand, even if a new line attribute is added to the subscriber line accommodated in the subscriber line accommodation means, the subscriber line accommodation Pseudo call origination or pseudo call reception tests can be performed by simply changing the interface conversion means of the means.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an example of a conventional subscriber line testing method.

[Explanation of symbols]

1 Subscriber line accommodation equipment 2 Test lead-in relay 3 Subscriber termination circuit 4 Test lead-in link 5 Multiplex demultiplexing circuit 6 Exchange control link transmission/reception port 7 Subscriber line accommodation equipment control processor 8 Multiplexed communication path interface 10 Line testing equipment 11 Test trunk 12 Test control device 13 Line test stand 20 Multiplexed communication path 21 to the exchange 21 Communication path 22, 2 to the central control device of the exchange
3 Subscriber 30 Interface conversion circuit 31 Subscriber circuit 32 Test trunk termination circuit 33 Subscriber circuit selection relay

Claims (2)

[Claims] Claim 1: A subscriber line accommodating means connected to an exchange and accommodating a subscriber line, a lead-in means for leading the exchange side of the subscriber line, a line testing means for testing the line, and a subscriber line drawn in by the lead-in means. an interface conversion means for converting an interface with the subscriber line; the line test means includes a test trunk that interfaces with the interface means; and a line test stand that inputs and outputs information for line testing; a test control device that controls transmission and reception of information between the test trunk and the line test stand, and the line test stand is configured to connect the subscriber terminal as a pseudo subscriber terminal via the test trunk and the interface conversion means. A subscriber line test method characterized by connecting to a subscriber line. 2. The interface conversion means includes a plurality of subscriber circuits that differ according to subscriber line attributes, a subscriber circuit selection relay for connecting the lead-in means to the subscriber circuit, and the line test 2. A subscriber line testing system according to claim 1, further comprising a test trunk termination circuit interfacing with the means.