JPH0440145A - System for testing junction line for common line signal system - Google Patents

Abstract

PURPOSE:To enable the return test of a line correspondence part only by a self-exchange by housing plural common line signal paths in a common line signal path control part and providing a returning means to return and connect a pair of common line signal paths and a pair of communication paths. CONSTITUTION:When a tester tests a line correspondence part 13, a line termination part 133 in the line correspondence part 13 is driven and it is announced to a central control part 12 to execute the return test of the line correspondence part 13. The driven line termination part 133 connects respective channels in a highway 3 while returning them for each pair decided in advance. In such a state, a call is originated from a subscriber 2a to be housed in an exchange 1 and after connecting the originated call to a path Ra, a telephone number, to which the terminating call can be connected, is transmitted to a subscriber 2b to be housed in the same exchange 1. Since the both subscribers 2a and 2b execute communication through communication paths 5a and 5b returned and connected by the line termination part 133, the normality of the line correspondence part 13 is confirmed.

Description

[Detailed Description of the Invention] [Summary] Regarding the improvement of the common line signaling system trunk line test method for testing trunk lines that adopt the common line signaling system that connects exchanges, the present invention relates to improvements in the common line signaling system trunk line test method for testing trunk lines that connect exchanges using the common line signaling system. The purpose of this test is to enable testing of common line signaling system trunk lines without the need for connections. In an exchange equipped with a line corresponding section having a common line signal path control comb section for controlling transmission and reception of control signals, the line-to-air section includes a multiplexing means for accommodating a plurality of common line signal paths in the common line signal path control section. , a common line signal path belonging to a plurality of common line signal system routes provided in a common line signal system trunk line by a switching system, including a pair of common line signal paths and a return means for connecting the pair of communication paths back and forth; and the communication paths are connected to each other by a loopback means, so that a loopback test of the line corresponding section can be performed.

[Industrial application field]

The present invention relates to an improvement in a common line signaling trunk line test method for testing trunk lines employing a common line signaling system that connects exchanges.

The Na3 common channel signaling system based on the CCITT recommendations has been put into practical use as a signaling system that enables rapid transfer of a rich variety of control signals between highly functional exchanges, - The signaling system using the D channel used for network interfaces is about to be applied to trunk lines connecting private branch exchanges, for example.

Accordingly, there is a strong demand for streamlining the testing method for trunk lines that employ the common line signaling system.

[Conventional technology]

FIG. 3 is a diagram showing an example of a conventional switching system, and FIG. 4 is a diagram showing an example of a conventional common line signaling trunk line test system.

3 and 4, exchange 1 has subscriber 2
In addition to the communication channel network 11 accommodating the exchange 1, the central control 11 section 12 that controls the exchange processing of the exchange 1, and the communication network 11 that accommodates the A line corresponding section 13 is provided which connects the highway 3 connecting between the communication network 11 and the central control section 12 as a common line signaling relay line.

The exchange 1 employs a common line signaling system for the highway 3, and if the highway 3 has a transmission rate of 2 megabits per second, for example, and is composed of 32 channels each having a communication rate of 64 kilobits per second, One predetermined channel is used as a common line signal path 4 to transfer various control signals between exchanges, and the other 30 channels are used to transmit and receive voice, data, etc. by each call set up via both exchanges. It is used as a communication path 5 for transferring information.

The line support unit 13 is configured to accommodate one highway 3, and the common line signal path 4 (1 channel) is connected to the central control unit 1 through a built-in common line signal path control unit 131.
The communication path 5 (30 channels) is connected to the communication path network 11.

Note that the exchange l1i1 treats the highway 3 as one route R1.

When carrying out a test of the line support section 13, the tester connects the local exchange 1-1 and another exchange 1-2 via the highway 3, and then connects the subscriber exchange 1-1 accommodated in the exchange 1-1. The subscriber 2-1 makes a call and transmits the telephone number of the subscriber 2-2 accommodated in another exchange 1-2 via the highway 3.

The call control unit 121 detects a call from subscriber 2-1,
When the route R1 is identified by analyzing the received telephone number, the route R1 is identified by referring to the signal channel communication channel management unit 123.
The common line signal path 4 corresponding to the route R1 is recognized and read, and the vacant communication path 5 in the route R1 is captured.

The call control unit 121 sends a call control signal including the incoming telephone number, the identification number of the captured communication path 5, etc. to the common line signal path 4 via the common line signal path control unit 131 in the line handling unit 13. do.

The exchange 1-2 that received the call control signal executes an incoming call connection to the subscriber 2-2 specified by the received telephone number using a known method, and connects the notified communication path 5 and the called subscriber 2-2. Set up a communication path between.

The tester communicates with the line support unit 1 by communicating via the communication path set up between both subscribers 2-1 and 2-2.
Check the normality of the meter.

[Problem to be solved by the invention]

As is clear from the above explanation, in the conventional common line signaling trunk line test method, it was essential that the highway 3 to be tested was connected to another exchange 1-2. 1. There were some questions that could not be tested alone.

Note that if the exchange 1 accommodates a plurality of highways 3 each treated as a different route, and a plurality of line correspondence units 13 are provided to accommodate each highway 3, the pair of line correspondence units 13, It is also considered to make loopback connections between the terminals connecting each highway 3 and perform a loopback test connection within the own exchange 1, but it is rare for a small-scale exchange 1 to accommodate multiple highways 3. Therefore, it cannot be expected that the exchange 1 will always be provided with a plurality of line support sections 13.

SUMMARY OF THE INVENTION An object of the present invention is to enable testing of common line signaling trunk lines in any exchange without requiring connection to other exchanges.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 1 is an exchange, 100 is a common line signaling system trunk line, 4 and 5 are common signal lines and communication paths provided within the common line signaling system trunk line 100, and 13 is a common line signaling system trunk line. 131 is a common line signal path control unit that transfers various control signals via the common line signal path 4 of the common line signaling trunk line 100.

Reference numeral 200 denotes a multiplexing means provided within the line correspondence section 13 according to the present invention.

Reference numeral 300 denotes a return means provided in the line correspondence section 13 according to the present invention.

[Effect]

The multiplexing means 200 causes the common line signal path control unit 131 to accommodate a plurality of common line signal paths 4 .

The loopback means 300 loops back and connects the pair of common line signal paths 4 and the pair of communication paths 5.

As a result, a plurality of common line signaling routes R are included in the common line signaling trunk line 100 accommodated in a single line corresponding section 13.
n to R7, it becomes possible to connect back and forth between multiple routes R1 to R7, and a single line corresponding section 13
It becomes possible to repeat the test.

Note that it is considered that the common line signal path 4 and the communication path 5 belonging to each route R1 to R1 can be set arbitrarily.

Therefore, even in small-scale exchanges that do not have multiple line support units that accommodate common line signaling trunk lines, it is possible to perform loopback tests on the line support units using only the own exchange, improving maintainability, operability, and economy. Improves sex.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a switch according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the highway 3 is housed in the line corresponding section 13 as the common signal system trunk line 100 in FIG. Furthermore, a line termination section 133 is provided within the line corresponding section 13 as the folding means 300 in FIG.

A two-channel common line signal path 4 (individual common line signal paths are referred to as 4. and 4., hereinafter the same) is provided within the highway 3, and common line signal path control is performed via a multiplexing section 132. It is housed in the section 131.

The exchange 1 uses the signal path communication path management unit 123 to control one of the common signal paths 4. Then, a part of the plurality of communication paths 5 (hereinafter referred to as communication path 5.) is treated as one route R1, and the other common line signal path 45 and the remaining communication path 5 (hereinafter referred to as communication path 5.) are treated as one route R1. and is treated as another route R1.

Note that the signal path communication channel management unit 123 connects any channel within the highway 3 to a communication path of 5 m or 5 m. It is possible to make it belong to route R1 or R5 as follows.

In FIG. 2, when the tester tests the line handling section 13, he drives the line termination section 133 in the line handling section 13 and also sends a message to the central control section 12 to perform a loopback test on the line handling section 13. Notice.

The driven line termination section 133 loops back and connects each channel within the highway 3 for each predetermined pair.

As a result, common line signal paths 41 and 4. is the multiplexing section 132
Each communication path 5. , and to each corresponding communication path 5 belonging to route R5 are connected back to the communication path network 11, respectively.

In this state, subscriber 2 accommodated in exchange 1 makes a call, connects to route R1, and then sends a telephone number that allows incoming connection to subscriber 21 accommodated in the same exchange 1.

The call control unit 121 controls subscriber 2. When route R1 is identified by detecting a call from and analyzing the received telephone number, it refers to the signal route communication channel management unit 123 and recognizes the common signal route 4° corresponding to route R3. , and further captures one of the free communication paths 5 (hereinafter referred to as 5□) belonging to the route R1.

The call control unit 121 connects the common line signal path 4. Then, a call control signal containing the incoming telephone number and the identification number of the captured communication channel 5□ is sent out.

The sent call control signal is sent to the common line signal path 4. in the line termination section 133. and 4. multiplex unit 1 via a return connection path with
32, and is sent back to the call control section 121 via the multiplexing section 132 and the common line signal path control section 131.

The call control unit 121 uses the common line signal path 4. Based on the identification number of the communication path 51 included in the call control signal that arrived from the call control signal and the fact that the line handling unit 13 is currently in the loopback test state, the route R that is loopback connected to the communication channel 5□ by the line termination unit 133 is determined.
The signal path management unit 12 determines that the communication path 5b (hereinafter referred to as communication path 5 kl) belonging to
Switch to 3.

Next, the call control unit 121 instructs the communication path control unit 122 to connect the calling subscriber 21 and the communication path 5□ via the communication path network 11, and to connect the calling subscriber 2° and the communication path 51 via the communication path network 11. are connected via the communication channel network 11.

Please note that subscriber 2. In the process of establishing a communication path between The signal is sent back to the call control unit 121 via line signal paths 4s and 41.

Both subscribers 2. and 2. confirms the normality of the line handling unit 13 by communicating via the communication paths 5□ and 51 which are loop-connected by the line termination unit 133.

As is clear from the above description, according to the present embodiment, the single line correspondence section 13 is connected to the common line signal paths 4, 4, and 4, respectively. and multiple communication channels5. a route R1 consisting of a common line signal route 4. and a route R consisting of a plurality of communication channels 5b.
1, and when testing the line corresponding section 13, the line termination section 133 allows the common line signal path 4.1 to be accommodated. and 45, and communication path 5. and 5b are loop-backed to each other, so it is possible to perform a loop-back test on the line support section 13 using switch 1 alone, and as shown in FIG. It disappears.

It should be noted that FIG. 2 is only one embodiment of the present invention, and for example, Highway 3 is not limited to being treated as two sets of routes R1 and R5, and the required number of common signal routes can be used. By providing such a route, it may be possible to treat the route as a larger number of routes, but the effects of the present invention do not change even in such a case. It goes without saying that the exchange 1 to which the present invention is applied is not limited to that shown in the drawings.

〔Effect of the invention〕

As described above, according to the present invention, even in a small-scale exchange that does not have a plurality of line support units that accommodate common line signaling trunk lines, it is possible to carry out a return test of the line support unit using only the own exchange. The maintainability, operability, and economy of switching equipment are improved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the principle of the present invention, Fig. 2 is a diagram showing an exchange according to an embodiment of the invention, Fig. 3 is a diagram showing an example of a conventional exchange, and Fig. 4 is a diagram showing a conventional common line signal. It is a diagram showing an example of a trunk line test method. In the figure, 1 is an exchange, 2 is a subscriber, 3 is a highway, 4 is a common signal path, 5 is a communication path, 11 is a communication path network, 1
2 is a central control unit, 13 is a line support unit, 100 is a common line signaling relay line, 121 is a call control unit, 122 is a communication path control unit, 123 is a signal path communication path management unit, and 131 is a common line signal path control unit. 132 is a multiplexing section, 133 is a line termination section, 20
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Claims (2)

[Claims] (1) Accommodates a common line signaling trunk line (100) including a common line signal path (4) and a communication path (5), and controls transmission and reception of control signals via the common line signal path (4). Line support unit (13) having a common line signal path control unit (131)
In the switching equipment (1), the line corresponding section (13) includes a plurality of common line signal paths (4).
multiplexing means (200) for accommodating the common line signal path (4) and the pair of communication paths (5) in the common line signal path control unit (131); , wherein the exchange (1) connects the common line signaling trunk line (100
) The common line signal path (4) and the communication path (
5) A common line signaling trunk line test method, characterized in that the lines are connected by the loopback means (300) to enable a loopback test of the line corresponding section (13). (2) The common line signal method according to claim 1, wherein the common line signal path (4) and the communication path (5) belonging to each of the routes (R_a to R_n) can be set arbitrarily. Trunk line test method.