KR20010056849A - The test method for isnd subscriber interface board - Google Patents

Abstract

PURPOSE: A method for testing ISDN basic subscriber interface is provided to test the activation on the ISDN basic subscriber interface and D channel by the subscriber line in the IDSN BSI without additional testing device. CONSTITUTION: According to the test request with respect to ISDN BSI from the operator of the exchange, if the activation test request signal with respect to a random subscriber line is transmitted from the device control unit, the request signal is sent to NT through a control channel of the random subscriber line at the state that an out-test relay(233) and an in-test relay(231) are not operated. If the response signal is received from the NT(210), it is notified to the upper processor(223) that the test result of the corresponding subscriber line is normal. If the response signal is not generated from the NT until the first predetermined time passes, the test result is notified to be abnormal to the upper processor through the device control unit(225). If the test request signal with respect to the data channel of the random subscriber line is transmitted, one of the points that can set the loop-back path with respect to the data channel is selected and set up on the random subscriber line. A random test signal is loaded on the data channel and transmitted to the point. If the transmitted random signal coincides with the random test signal within the second predetermined period of time, it is notified to the upper processor that the data channel is normal. If they are inconsistent, the data channel is notified to be abnormal to the upper processor.

Description

TEST METHOD FOR ISND SUBSCRIBER INTERFACE BOARD}

The present invention relates to a test method for an integrated services digital network (hereinafter, referred to as ISDN) subscriber matching board (also referred to as a basic subscriber interface (BSI)), and in particular, activation and activation of an ISDN subscriber matching board. The test method for D channel.

As is well known, ISDN is a system for providing multi-purpose telecommunication services using digital technology, the main components of which are digital exchanges, digital transmission lines and ISDN terminals.

Digital exchanges are equipped with ISDN subscriber matching boards that can be matched with ISDN subscriber terminals, just like any other exchange. The activation test for this ISDN subscriber matching board is to check whether the corresponding control line (Command / Indication Channel, C / I CH) can be operated normally, and the D channel test checks the corresponding D channel path. This is to check whether data can be transmitted and received through the network. In order to perform these tests, a separate test apparatus had to be provided.

That is, a test apparatus capable of matching with the in-test relay 126 or the out-test relay 128 through the relay matching unit 127 provided in the ISDN subscriber matching board 121 as shown in FIG. 140) to perform the above-described activation test and D-channel test. Referring to Figure 1 to describe the existing activation and D-channel test in more detail as follows.

First, when the operator inputs a test request command for the ISDN subscriber registration board 121 through the operator terminal not shown before performing the test through the test device 140, the above-described ISDN subscriber registration board 121 is provided The test request command is sent to an upper processor (not shown) of the subsystem 120. Accordingly, the upper processor (not shown) authorizes a test request command for the ISDN subscriber matching board 121 to the Telephony Processor 130 that manages the corresponding ISDN subscriber matching board 121, and The pony processor 130 applies the test request command to the device controller 129 described above, and the device controller 129 transmits the test request command to the processor 122 in the corresponding ISDN subscriber registration board 121.

The processor 122 serves to control the overall functions of the ISDN subscriber registration board 121 by loading firmware for the ISDN subscriber registration board 121, and the test request command described above from the device controller 129. When this is applied, the intest relay 126 is driven through a line termination 125, so that the intest relay 126 is connected to the test apparatus 140.

The test apparatus 140 connected to the intest relay 126 first carries an activation test request signal on a corresponding C / I channel to the LT 125 via the relay matching unit 127 and the intest relay 126. send. The LT 125 performs decoding and multiplexing so that an applied activation test request signal may be carried on a C / I channel of a corresponding subscriber line and transmitted to an extended PCM Interface Controller (EPIC) 123.

The EPIC 123 transmits two B channel information among the channel information transmitted from the LT 125 to the data link control unit DLC, which is not shown in the device control unit 129, and controls channels (monitoring channel and C / I channel). ) Transmits to the processor 122. Therefore, as described above, the activation test request signal transmitted through the C / I channel is transmitted to the processor 122.

When the activation test request signal is applied through the C / I channel, the processor 122 transmits the corresponding response signal AI (Activation Indication, hereinafter referred to as AI) to the corresponding C / I channel and transmits it to the EPIC 123. The EPIC 123 transmits the AI signal loaded on the C / I channel to the test apparatus 140 via the LT 125, the intest relay 126, and the relay matching unit 127. When the AI signal is received as a response signal to the activation request signal for the corresponding subscriber line, the test device 140 recognizes that the activation state of the corresponding subscriber line is normal. However, if the AI signal is not received for a certain time, it is recognized that the activation state of the corresponding subscriber line is abnormal.

If the above-described activation test result is recognized as a normal state, the test apparatus 140 sets asynchronous balanced mode extension (SABME), which requires a data link setting to test a D channel for a corresponding subscriber line. Weak) and transmit the signal on the corresponding D channel. The transmitted SABME signal is transmitted to the line termination unit 125 via the relay matching unit 127 and the intest relay 126. The line terminator 125 decodes the applied SABME signal and multiplexes it to be carried on the D channel of the corresponding subscriber line.

IDEC (abbreviated as IDEC D-Channel Exchange Controller, hereinafter referred to as IDEC) 124 detects the D-channel information among the information output from the LT 125 and transmits it to the processor 122, so that the SABME signal described above is detected. If so, the processor 122 transmits the signal to the processor 122. When the SABME signal is applied, the processor 122 sends the corresponding UA (Unnumbered Acknowledgement) signal to the corresponding D channel to the IDEC 124, and the IDEC 124 sends the UA signal through the LT 125. The test relay 126 and the relay matching unit 127 are transmitted to the test apparatus 140. Accordingly, the test apparatus 140 recognizes that the D channel state of the corresponding subscriber line is also normal. However, if a UA signal is not received despite a predetermined time elapsed after transmitting the SABME signal, it is determined that the state of the corresponding D channel is abnormal.

The activation and D channel test procedures described above are performed for each subscriber line.

As described above, in order to perform activation and D-channel test on the subscriber line in the ISDN subscriber registration board 121, a separate test apparatus 140 must be connected to the corresponding ISDN subscriber registration board 121, so that the test environment is set. In addition to this cumbersome, the cost and installation space should be secured by having a separate test device 140.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned shortcomings. The present invention provides a general information network subscriber matching that can perform activation and D-channel tests for each subscriber line in an integrated subscriber network (ISDN) subscriber matching board without installing a separate test apparatus. The purpose is to provide a board test method.

In order to achieve the above object, the method according to the present invention is connected to the network termination device (NT) through the out test relay in the exchange, the in-test relay and the internal line termination (LT) is connected, and through the device control unit In the test method of the integrated information network subscriber matching board communicating with the upper processor, if the activation test request signal for any subscriber line is transmitted from the device controller according to the test request from the operator of the switch to the integrated information network subscriber matching board. Transmitting an activation test request signal to a network termination device through a control channel of a subscriber line without driving out test relays and in-test relays; If a response signal corresponding to the activation test request signal is generated from the network termination device, notifying the upper processor of the activation test result of the corresponding subscriber line through the device controller; If the corresponding response signal is not generated until the first predetermined time elapses from the network terminating device, notifying the upper processor of the activation test result of the corresponding subscriber line through the device controller; If a test request signal for a data channel of any subscriber line is transmitted from the device controller, selecting and setting one of the points capable of establishing a loop back path for the data channel on any subscriber line; Loading any test signal on a data channel of any subscriber line and sending it to a point where a loopback path is established; Notifying the upper processor through the device controller that the data channel is normal if any signal transmitted from the set point matches a test signal within a second predetermined time; If any of the signals and the test signal does not match, it is characterized in that it comprises the step of notifying that the data channel is abnormal.

1 is a system block diagram for explaining a test method for the existing integrated information network subscriber registration board,

2 is a system block diagram for explaining a test method for the integrated information network subscriber registration board according to the present invention.

<Description of the symbols for the main parts of the drawings>

200: ISDN subscriber terminal 210: Network terminating device (NT)

220: switch 221: ISDN subscriber matching subsystem

222: Central Control Subsystem (CCP) 223: Higher Processor (ASP)

224: Telit processor (TP) 225: Device control unit

226: ISDN Subscriber Registration Board 227: Processor

228: Extended PCM Interface Controller (EPIC)

229: ISDN D-channel Exchange Controller (IDEC)

230: Line termination (LT) 231: In test relay

232: relay matching unit 233: out test relay

234: Operator terminal

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

FIG. 2 is a system block diagram illustrating a test method for a general information communication network (hereinafter, referred to as ISDN) subscriber matching board according to the present invention, which is referred to as ISDN subscriber terminal 200 and network termination device (hereinafter referred to as NT). ) 210, exchanger 220, and operator terminal 234.

Switch 220 is a central control subsystem (hereinafter abbreviated as CCP) 222, the ISDN subscriber matching subsystem 221 that performs matching processing with the ISDN subscriber station 200 through the NT (210) Include. The ISDN subscriber matching subsystem 221 is a higher processor (Access Switching Processor (abbreviated as ASP) 223), the lower processor Telephony Processor (abbreviated as TP) 224, device level The ISDN subscriber matching board 226, the TP 224 and the ISDN subscriber matching board 226 is composed of a device control unit 225 for transmitting and receiving a control signal.

The ISDN subscriber matching board 226 is a processor 227 for loading the firmware of the board to control the overall functions of the board, and an EPIC (Extended PCM Interface Controller) for transmitting / receiving the remaining channel data except the D channel. Weak (EPIC) (228), IDEC (ISDN D-channel Exchange Controller, referred to as IDEC hereinafter) 229, line termination (hereinafter referred to as LT) (230), which performs transmission and reception on the D channel. It consists of an intest relay 231, a relay matching unit 232, and an outtest relay 233.

The line terminator 230 transmits the 2-wire information transmitted from the in-test relay 126 in a 2B + D + control channel (monitoring channel + C / I channel) structure, and is transmitted from the EPIC 228 or the IDEC 229. In order to transmit the information of the 2B + D + control channel structure to the two-wire structure, it is configured to be equipped with a two-line-four-line conversion function, echo cancellation function, decoding / coding function and multiplexing / demultiplexing function. In addition, there is a point where the loopback path may be set during the D-channel test. Points that can set the loopback path described above exist in the NT 210 and the ISDN subscriber station 200, respectively.

In the system configured as described above, the activation test and the D-channel test for the subscriber line of the ISDN subscriber registration board 210 according to the present invention are performed as follows.

First, if an operator requests an activation test and a D-channel test for the ISDN subscriber matching board 226 present in the ISDN subscriber matching subsystem 221 provided in the exchange 220 through the operator terminal 234, the CCP 222 sends the above-described test request signal to the ASP 223 in the ISDN subscriber matching subsystem 221.

When the test request signal described above is applied, the ASP 223 transmits a test request signal corresponding to the TP 224. The TP 224 analyzes the applied test request signal and transmits the test request signal to the device controller 225 controlling the corresponding ISDN subscriber registration board 226.

Accordingly, the device controller 225 first transmits an activation test request signal for the predetermined subscriber line to the processor 227 in the ISDN subscriber registration board 226. At this time, the predetermined subscriber line may be implemented such that the device controller 225 sequentially specifies the subscriber line existing in the ISDN subscriber registration board 226, and when the test request signal from the operator terminal 234 is applied. It can also be implemented to be specified together.

When the activation test request signal for the predetermined subscriber line is applied, the processor 212 first checks that the path between the intest relay 231 and the out test relay 233 existing in the predetermined subscriber line can be connected. The relay 231 and the out test relay 233 are not driven. Then, the activation test request signal is loaded on the C / I channel of the control channel of the predetermined subscriber line and sent to the EPIC 228. The C / I channel is used for transmitting control signals, and the monitoring channel is used for transmitting maintenance data.

The EPIC 228 is pulse code modulation (PCM) data, respectively, via a bus (eg, IOM2-BUS) connected to the processor 227 and a bus (IOM2-BUS) connected to the line termination 230. The matching process is performed so that the ACK can be transmitted. When the activation test request signal loaded on the C / I channel is transmitted from the processor 227, the PCM matching process is transmitted to the LT 230. The LT 230 demultiplexes and codes the activation test request signal transmitted through the C / I channel as before, converts it into a 2-wire structure, and transmits it to the in-test relay 231. The activation test request signal transmitted to the intest relay 231 is transmitted to the corresponding NT 210 through the relay matching unit 232 and the out test relay 233.

When the normal activation mode operation is possible, when the activation test request signal described above is received, the NT 210 carries an AI (Activation Indication) signal on the corresponding C / I channel within about 15 seconds and performs the ISDN subscriber of the exchange 220. The matching board 226 is sent out.

The AI signal sent to the ISDN subscriber registration board 226 is transmitted to the processor 227 through the path and the reverse path in which the activation test request signal was transmitted, and the processor 227 is transmitted through the corresponding C / I channel within a predetermined time. When the AI signal is received, it is determined that the activation mode of the corresponding subscriber line is normal, and the device controller 225 notifies the TP 224 that the activation mode of the corresponding subscriber line is normal. However, if the AI signal is not received through the corresponding C / I channel within a predetermined time period, it is determined that the activation mode of the corresponding subscriber line is abnormal and the device controller 225 notifies it.

If it is recognized that the activation mode of the corresponding subscriber line is normal, the TP 224 requests the device control unit 225 to perform a loopback test on the D channel of the corresponding subscriber line, and the device control unit 225 sends the processor 227 to the processor 227. D-channel loopback test request signal of corresponding subscriber line is transmitted.

When the D-channel loopback test request signal is applied, the processor 227 selects one of the points capable of establishing a loopback path for the D-channel of the corresponding subscriber line. Then, a signal for requesting the loopback path setting of the selected point is transmitted to the EPIC 228 in the corresponding C / I channel, and the EPIC 228 lines the loopback path setting request signal received through the C / I channel. Transmit to unit 230. In this case, the above-described loopback path establishment request signal may be implemented to be transmitted through a monitoring channel.

When the LT 230 decodes the loopback path setting request signal transmitted through the C / I channel, it sets the loopback path for the D channel corresponding to the case where the setting of the loopback point existing therein is required. Thereafter, the loopback path setup completion message is loaded on the corresponding C / I channel, and then transmitted to the processor 227 through the EPIC 228.

Accordingly, the processor 227 recognizes that the loopback path at the desired point is set, and loads an arbitrary test signal on the corresponding D channel to the LT 230 through the IDEC 229 to test the corresponding D channel. . The LT 230 sends any received test signal back to the IDEC 229 via the determined loopback path, and the IDEC 229 transmits the signal sent from the LT 230 to the processor 227.

When a signal is received from the IDEC 229 through the corresponding D channel within a predetermined time, the processor 227 compares whether the received signal coincides with any test signal generated for the test. If the comparison result is the same, the loopback test result of the corresponding D channel is reported to the TP 224 through the device controller 225. However, if any test signal and the received signal do not match or no signal is received through the corresponding D channel within a predetermined time, the processor 227 indicates that the loopback test result of the corresponding D channel is abnormal. Report to TP 224 through device controller 225.

On the other hand, when the loopback point for the D-channel test is selected as the NT 210 by the processor 227, the loopback setting request signal carried on the C / I channel is transmitted to the line termination unit 230 and the intest relay 231. Then, it is transmitted to the NT 210 via the relay matching unit 232 and the outtest relay 233 and processed as in the case of setting the loopback point in the LT 230 described above. As such, when the loopback point is set to the NT 210, any test signal carried on the D channel is looped back by the NT 210 and transmitted to the processor 227. When the loopback point for the D-channel test is selected as the ISDN subscriber station 200 by the processor 227, the loopback setup request signal carried on the C / I channel is transmitted through the NT210 to the ISDN subscriber station 200. ) Is processed as if the loopback point is set in the LT 230 described above, and any test signal generated at this time is looped back from the ISDN subscriber station 200 and transmitted to the processor 227.

As described above, the present invention provides a test method implemented so that activation and D-channel test of the subscriber line of the integrated information network subscriber matching board in the exchange can be performed by an operator command, thereby connecting a separate test apparatus. Not only does it solve the hassle that needs to be done, but it also prevents the occurrence of expenses due to the provision of test equipment, and there is no need to consider a separate test space.

Claims (2)

Testing of the integrated information network subscriber matching board connected to the network termination unit (NT) through the out test relay at the exchange, the in-test relay and the internal line termination (LT) connected, and communicating with the upper processor through the device control unit. In the method, According to a test request for the integrated information network subscriber matching board from the operator of the switch, when the activation test request signal for any subscriber line is transmitted from the device controller, the out test relay and the intest relay are not driven. Sending the activation test request signal to the network termination device through a control channel of the subscriber line; If a response signal corresponding to the activation test request signal is generated from the network termination device, notifying, by the device controller, that the activation test result of the subscriber line corresponding to the upper processor is normal; If the corresponding response signal is not generated until a first predetermined time elapses from the network terminating device, notifying the upper processor of the activation test result of the subscriber line corresponding to the higher processor through the device controller; Selecting and setting one of points for setting a loop back path for a data channel on the random subscriber line when the test request signal for the data channel of the random subscriber line is transmitted from the device controller; Sending a test signal to a data channel of the subscriber line to a point where the loopback path is established; Notifying the upper processor through the device controller that the data channel is normal if any signal transmitted from the set point matches the predetermined test signal within a second predetermined time; And informing that the data channel is abnormal when the arbitrary signal and the arbitrary test signal do not coincide with each other. 2. The terminal of claim 1, wherein a point at which a loopback path for the data channel can be established on the subscriber line is present in the integrated information network subscriber station connected to the line terminator, the network terminator, and the network terminator. Comprehensive information network subscriber registration board test method characterized in that.