KR20010058120A - Digital ESS trunk testing method - Google Patents

Abstract

PURPOSE: A method for testing a digital exchange trunk line is provided to enable all trunk lines having R2 and ISUP signaling types, and make a remote loop-back for each trunk in a trunk interface board of a response station. CONSTITUTION: A test station transfers a test instruction to a trunk test block in the test station. The trunk test block opens a communication path, and checks a signaling type of a test target trunk line. The trunk test block sends a special number for test to a signal process block. The signal process block occupies the trunk line in order to transmits the special number to the response station. A number translation block in the response station translates the special number, and sends a remote loop-back instruction to a control board if the translated number is recognized as the special number for the test. The control board sends the remote loop-back instruction to the trunk interface board, which establishes a communication path between the test station and the response station. A trunk test device in the test station sends a test signal to the response station. The trunk interface board checks characteristics of retransmitted inputted signal, and thereby determines whether an error has occurred.

Description

Digital switch trunk test method {Digital ESS trunk testing method}

The present invention relates to a method for testing a relay switch for a digital switch, and more particularly, to a method for performing a test regardless of a relay signal method using only a relay test apparatus (TTC) mounted in a test station.

In order to improve the line quality and provide high quality service for the trunk line in the TDX series exchange, the transmission characteristics are measured by the operator or the centralized operation system. There are two types of tests: Code105 test, which is an analog test, and BERT test, which is a digital test.

In the first conventional technology, a relay test apparatus (TTC) transmits a test signal from a test station to a response station and receives a result from the response station, and a test signal received for the relay line test from the response station to the test station. This is a method of operating as FER (Far End Responder) to determine whether the relay line is normal by analyzing.

Referring to FIGS. 1 and 2, when a test request is made by an operator or a centralized operating system as a procedure for testing a relay line, an exchange may include a Telephony Device Maintenance Handling Block (TDMH) (10). Check the normal status and channel occupancy status of TTC (Trunk Test Control Board) in your country.

If normal, occupy TTC (relay line tester), request special number translation to NTR (Number Translation Block) (12) for test number to construct test path to responder station, and then RCO (Route Control) A test target relay line is assigned to a block (route control block) 14.

Then, TKC (Trunk Control Block) 16 requests the occupation of the relay line, occupies the relay line for the test number, and sends the test number to the responding station.

Then, after receiving the digit input from TKC (R2 Relay Line Control Block) of the answering station, translate the special number in NTR (12), and if it is determined for testing, configure TWC (Time Switch) inside the exchange, and then TTC After occupying (relay line tester), it loops back to the test station.

In this case, when the call path between the test station and the answering station is configured, the result of the transmission from the answering station is reported to the upper end by performing the NER (Near End Responder) function in the TLT (Trunk Test Block) of the test station Done. Reference numeral 20 denotes an UPC (ISUP trunk line control block).

The problem with this method is that in order to test the trunk line, as shown in Fig. 2, both the test station and the response station should have a TTC (relay line test device), and if one side does not have a TTC (relay line test device), You will not be able to.

The second prior art is a method of testing only the TTC (relay line test apparatus) in the test country in order to test the relay line, and has a configuration as shown in FIG.

1 and 3, after receiving a digit input from the TKC (R2 relay line control block) 16 of the answering station after transmitting a digit from the test station, the NTR 12 performs a special translation for test purposes. If a decision is made, loopback is made from the TSW (Time Division Switch) to the answering station. Here, the test station transmits a test signal and receives the test signal through the loopbacked path to the TSW (Time Division Switch).

The advantage of this method is that if the test station is equipped with a TTC (relay line test device) only in the test station as shown in Fig. 3, the test can be performed regardless of the presence or absence of the TTC (relay line test device) of the responding station. The test path is "relay line + TSW" because it occupies TSW resources of the responding station to test the relay line and only the relay line should be tested for accurate test of the relay line. will be.

When the relay system occupies the relay line with the R2 method when the signal method of the relay line is changed from the R2 (TKC block) to the ISUP (UPC block) signal system, the relay line using the ISUP signal system cannot be tested. .

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, so that both the R2 and ISUP signaling relay lines can be tested, and to allow remote loopback for each trunk in the relay line matching board of the answering station. Its purpose is to provide a test method for digital switchboard lines.

In order to achieve the above object, a digital switchboard test method according to a preferred embodiment of the present invention includes: transmitting a command to a relay test block in a test station as the test station receives a test execution command;

The relay line test block using a time division switch to open a communication path of a relay line test apparatus in a corresponding test country and examine a signaling method of a test target signal relay line;

Transmitting the test number to the corresponding signal processing block in the test station according to the signal method according to the survey result, and sending the special number to the responding station by occupying the relay line in the corresponding signal processing block;

Translating the number in the number translation block in the answering station and transmitting a remote loopback command to the control board in the answering station if it is recognized as a test number;

Transmitting the remote loopback command from the control board in the answering station to the relay line matching board in the corresponding answering station, and processing the remote loopback command in the relay line matching board to establish a communication path between the test station and the answering station;

Transmitting a test signal to the answering station by a relay line test apparatus of the testing station as a communication path between the test station and the answering station is established; And

And repeating the test signal at the relay line matching board of the answering station and retransmitting the test signal to the test station to determine characteristics of the retransmitted signal and determine whether there is an abnormality.

1 is a general repeater test block interlock structure diagram,

2 is a view for explaining the operating procedure of the TDX series relay test apparatus according to a conventional example,

3 is a view for explaining the operating procedure of the TDX series relay line test apparatus according to another conventional example,

4 is a view illustrating a digital switchboard trunk test method according to an embodiment of the present invention;

5 is a configuration diagram of a relay line matching board employed in an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: TDMH (Call line equipment maintenance processing block)

12: NRT (Number Translation Block)

14: RCO (root control block)

16: TKC (R2 Relay Line Control Block)

18: TLT (relay line test block)

20: UPC (ISUP trunk line control block)

30: multi-rate digital switch unit

40: TSW matching part

50: E1 Transceiver

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a functional block diagram of the exchange period for performing the relay line test method according to the present invention, it will be described by applying to the general relay line test block interlocking structure of FIG.

When the test station receives a command from the operator or a test run by the centralized operating system, it transmits the command to the TLT.

The TLT (relay line test block) opens a communication path of the TTC (relay line test device) by using a TSW (time division switch) and examines a signal system of a test target signal relay line so that a test special number can be sent out.

In case of the R2 method, the test number is transmitted to TKC (R2 repeater control block). In case of the ISUP method, the test number is transmitted to UPC (ISUP repeater control block). Accordingly, the UPC or TKC occupies the relay line and sends a special number to the responding station.

In response to the R2 method, the answering station starts TKC (R2 repeater control block) to receive digits. In the ISUP method, UPC (ISUP trunk control block) is activated to receive digits. After that, if the NTR (number translation block) is recognized as a test number after translating the number, NTR sends a remote-loopback command to the control board, and the control board sends a remote loopback command to the TI (relay line matching board). The TI (relay line matching board) performs this command to perform a remote loopback function.

When the test channel is opened in this way, the test station's TTC (transmission line tester) sends out a test signal, which is looped back to the test station's TI (relay line matching board) and returned to the test station. At this time, the TTC (relay line tester) of the test station determines the abnormality by identifying the characteristics of the returned signal.

FIG. 5 is a configuration diagram of a relay line matching board employed in an embodiment of the present invention, wherein a multi-rate digital switch unit 30 performs remote loopback on a channel basis for a remote loopback function. Add the ability to do it.

In FIG. 5, the multi-rate digital switch unit 30 functions to multiplex / demultiplex the 64-channel SHW in 32-channel E1 units. The multi-rate digital switch unit 30 transmits a remote loopback control command to the control board for controlling the TI (relay line matching board) if the number is translated for NTR (number translation block) and then for a test number, and the control board is TI (relay line matching). Board) to perform a remote loopback function.

The TSW matching section 40 interfaces a time division switch and a TI (relay line matching board) to each other, and the E1 transceiver 50 performs information exchange with a response station which is a partner station.

On the other hand, in the embodiment of the present invention, if the outgoing call is occupied for the relay line test, it is checked whether the relay line is the R2 method, and if it is the R2 method, it drives TKC (R2 relay control block), and if it is the ISUP method, UPC (ISUP relay control) Block).

According to the present invention as described above, it is possible to test regardless of the type of signal system, and because the loopback is processed by the relay line matching board, the test can be performed without occupying the resources of the internal time division switch.

On the other hand, the present invention is not limited only to the above-described embodiments, it can be carried out by modifying and modifying within the scope not departing from the gist of the present invention, such modifications and changes should be regarded as belonging to the following claims. will be.

Claims (2)

As the test station receives a command to perform a test, transferring the command to a relay line test block in the test station; The relay line test block using a time division switch to open a communication path of a relay line test apparatus in a corresponding test country and examine a signaling method of a test target signal relay line; Transmitting the test number to the corresponding signal processing block in the test station according to the signal method according to the survey result, and sending the special number to the responding station by occupying the relay line in the corresponding signal processing block; Translating the number in the number translation block in the answering station and transmitting a remote loopback command to the control board in the answering station if it is recognized as a test number; Transmitting the remote loopback command from the control board in the answering station to the relay line matching board in the corresponding answering station, and processing the remote loopback command in the relay line matching board to establish a communication path between the test station and the answering station; Transmitting a test signal to the answering station by a relay line test apparatus of the testing station as a communication path between the test station and the answering station is established; And And repeating the test signal at the relay line matching board of the answering station and retransmitting the test signal to the test station to determine characteristics of the retransmitted signal and determine whether there is an abnormality. . The method of claim 1, And the test number is transmitted to the R2 repeater control block if the signal type of the test target signal relay line is R2, and the test number is transmitted to the ISUP repeater control block if the ISUP method is used.