KR100589968B1 - Method, Device and System for testing a junction line - Google Patents

Abstract

The present invention relates to a method, an apparatus, and a system for testing a relay line for a switching period, and more particularly, to test a relay line using test data looped back through a predetermined called subscriber line and an outgoing subscriber line. It relates to a method, an apparatus and a system that can be. The relay line test method according to the present invention comprises the steps of receiving a relay line test request signal including call setup information and test data from a remote control device, wherein the call setup information includes subscriber line information, relay line information, and the like, Generating and transmitting a loop request signal including call setup information to the exchange, receiving a loop completion signal from the exchange, transmitting test data to the exchange, and receiving test data looped back from the exchange. The method may include determining whether an error occurs in the looped back test data and transmitting a result of the determination of the error to the remote control apparatus.

Switchboard, repeater track, PCM, data

Description

Method, device and system for testing a junction line             

1A illustrates a method of testing a relay line using a test unit in accordance with one embodiment of the prior art.

1B is a diagram illustrating a method for measuring diminished call quality according to an embodiment of the prior art.

Figure 2 is a block diagram showing the overall configuration of a relay line test system according to an embodiment of the present invention.

Figure 3a and Figure 3b is a flow chart showing a relay line test method according to an embodiment of the present invention.

Figure 4 is a block diagram showing the configuration of a relay line test apparatus according to an embodiment of the present invention.

5A to 5G are diagrams illustrating a register structure of a relay line test apparatus according to an exemplary embodiment of the present invention.

Figure 6 is a block diagram showing the configuration of a remote destination device according to an embodiment of the present invention.

7 is a block diagram showing the overall configuration of a relay line test system according to another preferred embodiment of the present invention.

8 is a block diagram showing a configuration of a multiplexing apparatus according to an embodiment of the present invention.

9a and 9b is a flow chart showing a relay line test method according to another preferred embodiment of the present invention.

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

200: remote control unit

210: relay line test device

245 remote receiving device

400: control unit

410: Man Machine Processor (MMP) interface

415: outgoing modem

420: incoming modem

423: network interface

427: port

700: multiplexing device

The present invention relates to a method, an apparatus, and a system for testing a relay line for a switching period, and more particularly, to test a relay line using test data looped back through a predetermined called subscriber line and an outgoing subscriber line. It relates to a method, an apparatus and a system that can be.

With the popularity of mobile phones, competition among telecommunication service companies is intensifying, and correspondingly, interest in call quality is increasing.

The call quality may be classified into a wireless section call quality and a wired section call quality. The present invention relates to a method and apparatus for testing a line fault or call quality for a wired segment.

Types of repeater line failures occurring in the wired section include silent or one-way calls, false connections, and noise. Here, in the case of noise generation, the call is partially possible, whereas in the case of mute, unidirectional communication, and misconnection, the call is not possible at all.

Most of the above-mentioned poor call quality is caused by changing the relay section signaling type to an integrated information network user part (ISUP, ISDN User Part) format. In addition, the line defect is likely to be left for a long time if it is not found.

In order to prevent deterioration of the call quality due to the above-mentioned line defects, the conventional relay line test method is a test using a continuous check tone (CCT) test of the ISUP, a test using the circuit test function of the exchange itself, and a MOS (MOS) test. Call quality measurement by means of Mean Opinion Score, and test by circuit tester.

However, the test methods have the following problems.

First of all, Continuous Check Tone (CCT) is a circuit test method supported by ISUP, which transmits a certain signal after a circuit loop in a large country, and then compares the signals returned. This is a way of judging whether there is an abnormality.

CCT test can be used for circuit verification during call setup, but there is a problem that call setup time increases by the test time, and there is a problem that it is impossible to detect when the actual transmission line is looped.

A test using a test unit of the exchange itself will be described with reference to FIG. 1A.

1A is a diagram illustrating a method for testing a relay line using a test unit according to an exemplary embodiment.

Most exchanges have their own test units (TDX: TTTU, 5ESS: TTF, etc.) for circuit testing.

In order to test the relay line 130 between the test exchanger 120 and the power exchanger 140, the test unit 110 included in the test exchanger 120 and the test unit 150 included in the power exchanger 140. Using the relay line 130 can be tested.

Such switch-assisted circuit test methods can be broadly classified into digital characteristic test and analog characteristic test.

The digital characteristic test is a method of measuring a bit error rate (BER) by sending a specific bit pattern to a power station and comparing the pattern with a loop returned.

The analog characteristic test method is mainly the Code 105 test presented by 'AT & T'. This method is used for the Near End Responder (NER) of the originating exchange and the FER of the terminating exchange. : Measures power loss and noise by transmitting / receiving specific frequency between Far End Responders.

The method is a method of testing in a state close to the actual call environment than the BER measurement of the transmission path, but there is a problem that the function is not supported in some 'TDX' series exchange.

The call quality test method using MOS (Mean Opinion Score) measurement is a method of measuring call quality in the same way as a real call environment.

1B is a diagram illustrating a method for measuring diminished call quality according to an embodiment of the prior art.

Referring to FIG. 1B, the telephone 160 connected to the test repeater 170 is used to make a call to a specific telephone 195 of the preset switching center 190 and the telephone 195 connected to the switching center 190 is connected. The operator can directly test the call sensitivity.

Although the above method is suitable as a method for measuring the perceived call quality felt by the customer, there is a problem in that a lot of manpower is required for the measurement, and because the wired / wireless section is measured at the same time, it is not suitable as the line test method for the wired section.

As described above, the existing relay line test method does not support the automatic test for a specific relay line, there is a problem that can not detect a specific type of line failure.

Accordingly, an object of the present invention is to provide a method, an apparatus, and a system for testing a relay line through a relay line test apparatus connected to an exchanger.

Another object of the present invention is to provide a method, an apparatus and a system which can solve an excessive manpower and cost problem in testing a relay track and automatically test the relay track by a preset program.

It is a further object of the present invention to provide a method, apparatus and system for remotely designating any exchanger and relay line of the exchange period and testing the relay line.

It is still another object of the present invention to provide a method, an apparatus, and a system for testing a relay line connected to a plurality of exchanges through a multiplexing device with one relay line test apparatus.

According to an aspect of the present invention to achieve the above object, the method for testing the relay line in the relay line test device combined with the remote control device and the exchange is a relay line in the relay line test device combined with the remote control device and the exchange CLAIMS 1. A method of testing, the method comprising: receiving a relay line test request signal including call setup information and test data from the remote control device, wherein the call setup information includes subscriber line information, relay line information, and the like; Generating a loop request signal including the call setup information and transmitting it to the exchange; Receiving a loop complete signal from the exchange; Sending the test data to the exchange; Receiving LOOP BACK test data from the exchange, the loop back test data being received via a terminating modem included in the relay line test apparatus and a terminating subscriber line connected to the terminating modem; Determining whether an error occurs in the looped back test data; And transmitting a result of determining whether the error occurs to the remote control apparatus.

Here, the test data may be composed of 8-bit PCM data, and the loop in the loop completion signal may be formed in a call-only device connected to the exchange.

The transmitting of the test data to the exchange may be performed through an outgoing modem included in the relay line test apparatus and an outgoing subscriber line connected to the outgoing modem, and the test data looped back from the exchange. Receiving may be performed through a called modem included in the relay line test apparatus and a called subscriber line connected to the called modem.

According to another aspect of the present invention, connecting the relay line test device with a remote control device receives a relay line test request signal including call setup information and test data from the remote control device through an Ethernet interface and the relay line test device. And a memory for storing a program configured to transmit the test data and to receive the looped back test data to determine whether an error has occurred, and to transmit the test data through an outgoing subscriber line connected to the relay line test apparatus. An outgoing modem, an incoming modem for receiving the LOOP BACK test data through a called subscriber line connected to the relay line test device, and an MPP for matching with an MMP port of the switch. (MMP, Man Machine Processor) interface and a program stored in the memory By g may be provided with a relay line testing device comprising the said Ethernet interface, said M. BMP (MMP, Man Machine Processor) interface, the calling modem, the receiving modem, and a controller for controlling the memory.

The memory unit may include a resident memory in which firmware is stored and an execution memory in which the firmware is executed. In addition, the MMP interface may use an RS-232C interface.

According to another aspect of the invention, generating call setup information and test data, wherein the call setup information includes subscriber line information, relay line information, called subscriber number, and the like; Transmitting a relay line test request signal including the call setup information and test data to a relay line test device; Receiving an error determination result including an LOOP BACK test data from the relay line test apparatus; Calculating a bit rate using the LOOP BACK test data; And displaying and storing the calculated bit rate, wherein the relay line test device receives the loopback test data through a called modem included in the relay line test device and a called subscriber line connected to the called modem. A method for testing a relay line in a remote control device combined with a relay line test device and an exchange, and a system using the method may be provided.

Here, the test data may be 8-bit PCM data, and the method may further include generating an exchange identifier and inserting the generated exchange identifier into the relay line test request signal.

According to another aspect of the present invention, a method for testing a relay line in a relay line test apparatus combined with a multiplexing device and a remote control device connected to a plurality of exchanges includes call setup information, exchange identifier and test from the remote control device. Receiving a relay line test request signal including data, wherein the call setup information includes subscriber line information, relay line information, called party number, etc., and receives a loop request signal including the call setup information and an exchange identifier. Generating, transmitting to the multiplexing device, receiving a loop setup signal from the multiplexing device, transmitting the test data to the multiplexing device, receiving the LOOP BACK test data from the multiplexing device. Determining whether an error occurs in the LOOP BACK test data. Steps and can include the step of sending the error occurs if the determination result to the remote control apparatus.

Here, the test data may be 8-bit PCM data, and the loop setting signal may be formed in a call-only device connected to a multiplexing device.

The transmitting of the test data to the multiplexing apparatus may be performed through an outgoing modem included in the relay line test apparatus and an outgoing subscriber line connected to the outgoing modem.

In addition, the step of receiving the loop back (LOOP BACK) test data from the multiplexing device may be performed through the terminating modem included in the relay line test apparatus and the originating subscriber line connected to the terminating modem.

Hereinafter, preferred embodiments of the relay line test method, apparatus and system according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram showing the overall configuration of a relay line test system according to an embodiment of the present invention.

Relay line test method according to an embodiment of the present invention includes a remote control device 200, a relay line test device 210, a remote terminating device 245, when according to another embodiment of the present invention, multiplexing The apparatus may further include 700 of FIG. 7.

 The relay line test apparatus according to the present invention is an apparatus for testing the relay line of an exchanger. According to the present invention, it can be carried out automatically by a preset program, deviating from the existing way of using the functions provided by the exchange in the operator terminal. That is, the relay line test apparatus generates test data according to a predetermined test condition, and may measure the quality of the relay line using the looped back test data.

After the ISUP of the relay section, the call connection failure, which did not occur in the conventional R2 scheme, has been continuously occurring. This call connection failure occurs due to a difference between an ISUP using a common channel signaling (CCS) and an R2 method using a channel associated signaling (CAS).

In the conventional R2 scheme, when a circuit failure occurs in a relay section, the switch detects the circuit failure. That is, when a circuit failure occurs between an originating exchange and a destination exchange, signaling is performed through a voice call path in the R2 scheme, and thus signaling fails if a circuit defect exists, and the exchange detects a circuit failure. can do.

On the other hand, in the ISUP method, even if a circuit failure occurs in the relay section, it is impossible for the exchange to detect it. This is because signaling is performed through a separate signal path in the ISUP. Since the signaling is normally performed even if the voice call path is bad, the voice call path is connected through the bad line.

The present invention can not only detect a defective state of the relay line including the voice call channel using preset test data, but also detect fine errors that cannot be detected by voice.

Hereinafter, with reference to Figure 2 will be described the overall configuration of the relay line test system according to an embodiment of the present invention.

Referring to FIG. 2, the relay line test system according to the present invention includes a remote control device 200, a relay line test device 210, and a remote destination device 245.

The remote control apparatus 200 and the relay line test apparatus 210 are connected through a network including a LAN. The remote control apparatus 200 extracts a test target route through an MMP port of a test exchanger. Here, the route under test refers to a set of trunks, and a trunk refers to a large-capacity telephone channel installed between two telephone exchange systems, and has a wide bandwidth to simultaneously process voice and data signals.

When the remote control apparatus 200 transmits a line test request signal to the relay line test apparatus, the relay line test apparatus 210 transmits test data to a preset subscriber line corresponding to the request signal, and then loops back ( LOOP BACK) test data can be received by a preset called subscriber line.

The LOOP BACK test data is transmitted to the remote control device, and the remote control device 200 may measure the call quality for the relay line using the test data and the LOOP BACK test data. .

According to an embodiment of the present invention, the relay line test apparatus 210 is connected to the subscriber line 215 and the MMP line (MMP) line 220, the subscriber line may be made of two. have. One of the subscriber lines is an outgoing dedicated subscriber line and the other is an incoming only subscriber line.

The present invention can test the relay line between the test exchanger 225 connected to the relay line test device 210 and the power exchange 235 designated by the prefix, and the remote receiving device 245 connected to the power exchange 235. Is to configure the loop so that the loop is not formed in the power exchanger 235 but in the remote destination apparatus, so that the outgoing test of the power exchange 235 is possible. Therefore, it is obvious that the relay line test system according to the present invention may be configured such that a loop is formed in the power exchange 235 without the remote terminating device 245.

As described above, the relay track test system according to the present invention can automatically perform the test for the relay track from a remote, and can check the call failure for each relay track.

3A and 3B are flowcharts illustrating a relay line test method according to an exemplary embodiment of the present invention.

In one embodiment of the invention, the test data for testing the relay line may consist of 8bits PCM data. Hereinafter, the relay line test method according to the present invention will be described based on test data consisting of 8bits PCM data, but is not limited to the 8bits PCM data.

 The remote control apparatus according to the present invention generates test data consisting of 8bits PCM data, and transmits the generated data to the relay line test apparatus, and the remote control apparatus stores the looped back test data after the loop is configured. The call quality of the relay line may be determined by comparing the test data received from the relay line test apparatus and the generated test data with the looped back test data.

Here, the remote control device stores the test data looped back on the relay line or channel where the test result error occurs, and then uses the data as a basis for generating history data on whether there is an error for each relay line. Can be.

In addition, the relay line test apparatus receives 8-bit PCM data, that is, test data received from the remote control apparatus, transmits the test data through a channel of a predetermined relay line, and transmits the looped back test data to the remote control apparatus. Send.

As described above, the size of the test data can be arbitrarily set, and the larger the size of the data, the more accurate the state of the relay line can be tested.

The relay line test apparatus according to the present invention transmits test data received from a remote control device to a switch when a loop is configured, and compares test data looped back from the switch to the transmission data. If there is no abnormality as a result of the comparison (OK), only the information that there is no abnormality is transmitted to the remote control device, and if there is an abnormality (NOK), the looped back test data can be transmitted to the remote control device.

Hereinafter, a method for testing a relay line according to the present invention will be described with reference to FIGS. 3A and 3B.

In step 300, the remote control device sets a test prefix to designate a power exchange. Here, by omitting the root sequence value, it is possible to increase the test speed. In addition, the remote control apparatus may check the calling party number and the called party number and perform a local call processing test between the calling party and the called party to check the subscriber line status.

Then, in step 305, the remote control device reads the route information to be tested using a man machine commander (MMC) port, and database the read route information. Here, after selecting a test target route, it is possible to specify the number of channels to be tested per trunk.

According to an embodiment of the present invention, there are 32 channels in one trunk, and all 32 channels corresponding to each trunk may be designated, and only a few preset channels may be designated and inspected.

When the remote control apparatus transmits the relay line test request signal to the relay line test apparatus in step 310, the relay line test apparatus transmits a loop request signal including a preset calling party number and called party number in step 320.

In step 320, the test exchange extracts the prefix included in the loop request signal and transmits the loop request signal to the counter exchange corresponding to the prefix.

The power exchange receiving the loop request signal in step 335 may form a loop in the power exchange or may configure a loop through the remote destination apparatus.

In the present invention, the incoming remote device is provided for performing outgoing test of the power exchange. Hereinafter, a description will be given based on a case where a loop is configured through a remote destination apparatus.

When the loop is formed in step 347, the loop formation completion signal arrives at the relay line test apparatus through the power exchange and the test exchange.

The relay line test apparatus which has received the loop formation completion signal in step 350 extracts the preset line test data, and transmits the preset line test data to the remote destination apparatus through the test exchanger and the power exchanger in step 355.

Here, the test data is transmitted through the originating modem included in the relay line test apparatus. When the test data is made of 8bits PCM data, it can be transmitted and received at 64Kbps rate in the channel of the relay line.

In step 360, the remote receiving apparatus that receives the line test data through the terminating modem loops back the received data. In step 365, the test data thus looped back is relayed through the relay switch and the test exchange. Upon reaching the test apparatus, in step 370, the relay line test apparatus receives the LOOP BACK test data through a preset called subscriber line and a dedicated call modem connected to the called subscriber line.

In operation 375, the relay line test apparatus determines whether an error occurs by comparing the received test data with the transmitted test data, and transmits test result information including the determination result to the remote control apparatus in operation 380. Here, the relay line test apparatus may transmit the looped back test data to the remote control apparatus only when an error occurs.

In operation 383, the remote control apparatus calculates a bit error rate using the looped back test data, and determines the call quality of the relay line using the calculated bit error rate. In operation 385, the remote control apparatus stores and displays the bit error rate calculated for the looped back test data.

Hereinafter, the configuration of the relay line test apparatus and the remote reception apparatus according to an exemplary embodiment of the present invention will be described with reference to FIGS. 4 to 6.

Figure 4 is a block diagram showing the configuration of a relay line test apparatus according to an embodiment of the present invention.

The relay line test apparatus according to the present invention matches the MMP port of the switch, receives the relay line test request signal from the remote control device, receives the looped back test data to the switch, packetizes the remote control, and then Perform the function of delivering to the device.

The remote control apparatus collects and stores the line test information including the route information, the relay line information, the subscriber line information, and the prefix information of the exchange in a database, and transmits the line test request signal to the relay line test station using the line test information. can do.

Hereinafter, a configuration of a relay line test apparatus according to the present invention will be described with reference to FIG. 4.

Referring to FIG. 4, the relay line test apparatus according to the present invention includes a control unit 400, an MMP interface (MMP) interface 410, an outgoing modem 415, an incoming modem 420, and a network interface 423. ) And port 427.

The control unit 400 according to the present invention includes a central processing unit 401 and a memory unit 407. When the control unit 400 receives the relaying preference test request signal from the remote control device, the control unit 400 transmits test data through the preset called subscriber line and the calling subscriber line and receives the looped back test data to control the remote control device. Can be sent by

According to an embodiment of the present invention, the central processing unit 401 includes a memory controller, and may be directly connected to the memory unit 407 and other peripheral devices without a peripheral interface circuit.

The configuration table of the address decoder according to the present invention is shown in Table 1.

CS Port Address Device 0xFF000000-0xFF003FFF Central processing unit CS0 4B 0xFFE00000-0xFFFFFFFF Execution Memory (Firmware) CS2 4B 0x00000000-0x00FFFFFF Resident memory CS3 1B 0x10000000-0x1007FFFF Run My Memory (Internal Configuration) CS4 1B 0x11000000-0x1107FFFF FIFO CS5 2B 0x12000000-0x1207FFFF I / O Register

The address decoder according to an embodiment of the present invention is configured based on the case where the central processing unit 401 is implemented by the MPC860 of the power fish series.

The memory unit 407 includes a resident memory 403 and an execution memory 407. Here, the resident memory 403 stores firmware including an operating system (O / S), an application program, and the like, and firmware downloaded using a protocol such as FTP may be stored. According to an embodiment of the present invention, the resident memory 403 may be implemented as a flash memory.

The execution memory 407 executes an operating system (O / S) and an application program, and may be implemented as an SDRAM according to an embodiment of the present invention.

The man machine processor (MMP) interface 410 matches the MMP port of the exchange, receives a relay line test request command from the remote control device, collects the data received from the exchange, packetizes the IP packet, and then remotely It performs the function of transmitting to the control unit.

According to an embodiment of the present invention, when the RTC and DTR signals are output low among the RS232C signals, the corresponding port of the exchange may be configured to switch to a service state. The baud rates according to the present invention are 4800, 9600, 19200, and 38400, and can be configured to be arbitrarily selectable.

According to the present invention, the MMP interface can be implemented using a FIFO to process a message received at an exchange without loss.

The relay line test apparatus transmits test data to a subscriber line connected to the originating modem through the outgoing modem 415, and receives test data to a subscriber line connected to the incoming modem through the incoming modem 420.

The relay line test apparatus according to the present invention can test the relay line by transmitting and receiving test data other than voice by connecting a subscriber line with a modem. Therefore, the present invention can detect minute defects that are difficult to detect by voice through analysis of the transmitted and received data.

The Ethernet interface 423 may store network information such as an Ethernet address and an IP address in a resident memory, and transmit and receive data with a remote control device using the network information.

The relay line test apparatus according to the present invention may display a current state of the relay line test apparatus through an LED not shown in the figure, and may provide a reset function such as power reset, manual reset, software reset, and the like. In addition, the relay line test apparatus may output the modem's handshake sound by using the speaker interface function provided by the modem.

5A to 5G are diagrams illustrating a register structure of a relay line test apparatus according to an exemplary embodiment of the present invention.

Abbreviations corresponding to bit-by-bit functions of registers according to an embodiment of the present invention have the following meanings.

'DSR' is an abbreviation of Data Set Ready, and indicates the ready state of operation of the modem, and 'RTS' is an abbreviation of Request To Send, indicating that data transmission is requested. 'CTS' stands for Clear To Send, indicating that data can be transmitted. In addition, 'DCD' indicates the presence or absence of data received by detecting the receiving line, and 'DTR' indicates the connection state between the modem and the subscriber line.

Hereinafter, a description will be given with reference to the register map shown in FIGS. 5A to 5G.

5A shows the data structure of a system register. According to a preferred embodiment of the present invention, the D15 to D8 bits 500 are not used as the RESERVED bits, the D7 501 indicates the incoming speaker state, and the D6 bit 502 is used for reception. Indicates the state of the speaker. D5 bit 503 represents the LED control state, and D4 bit 504 represents the test result. Then, the D3 bit 505 indicates the firmware operation state, the D2 bit 506 indicates the reset signal of the FIFO, the D1 bit 507 indicates the reset signal of the modem, and the D0 bit 508 indicates the PBA. Indicates a reset signal.

5B illustrates the data structure of an originating subscriber line register in accordance with one preferred embodiment of the present invention. According to a preferred embodiment of the present invention, the D15 to D6 bits 510 are not used as RESERVED bits, and the D5 bits 513 represent DCD signals of the outgoing modem. And, the D4 bit 514 represents the CTS signal of the calling modem, and the D3 bit 515 represents the RTS signal of the calling modem. In addition, the D2 bit 516 represents the DSR signal of the calling modem, the D1 bit 517 represents the LED control signal of the modem, and the D0 bit 518 represents the DTR signal of the calling modem.

5C is a diagram illustrating a data structure of a called subscriber line register according to an exemplary embodiment of the present invention. According to a preferred embodiment of the present invention, bits D15 to D6 520 are not used as RESERVED bits, and bit D5 523 represents the DCD signal of the incoming modem. The D4 bit 524 represents the CTS signal of the incoming modem, and the D3 bit 525 represents the RTS signal of the incoming modem. Further, the D2 bit 526 represents the DSR signal of the incoming modem, the D1 bit 527 represents the LED control signal of the modem, and the D0 bit 528 represents the DTR signal of the incoming modem.

5D is a diagram illustrating a data structure of a man machine commander (MMC) processor register according to an exemplary embodiment of the present invention. According to a preferred embodiment of the present invention, the D15 to D8 bits 530 are not used as RESERVED bits, and the D7 to D6 bits 531 are baud rates of MMC (Man Machine Commander) processors. Indicates the setting status. If D7 to D6 bits 531 are '00', the 4800 baud rate is high, '01' is 9600 baud rate, '10' is 19200 baud rate, and '11' is 38400 baud rate. Bit D53 533 represents the LED control signal. In addition, the D4 bit 534 represents a DCD signal of an MMC (MMC), and the D3 bit 535 represents a CTS signal of an MMC (MMC). In addition, the D2 bit 536 represents the RTS signal of the MMC (Man Machine Commander), the D1 bit 537 represents the DSR signal of the MMC (MMC), and the D0 bit 538 represents the MMC. The DTR signal of (MMC, Man Machine Commander) is shown.

5E illustrates a data structure of a FIFO register according to an exemplary embodiment of the present invention. According to an exemplary embodiment of the present invention, the D15 to D3 bits 540 are not used as the RESERVED bits, and the D2 bits 546 indicate a state in which the FIFO is full of data (FULL). The D1 bit 547 represents a state (HALF EMPTY) half filled with data in the FIFO, and the D0 bit 548 represents an empty state (EMPTY) of the FIFO.

5F is a diagram illustrating a data structure of a ring counter register of an originating modem according to an embodiment of the present invention. According to a preferred embodiment of the present invention, bits D15 to D3 550 are not used as RESERVED bits, and bits D2 to D0 556 store the number of ring counts of the calling modem.

5G is a diagram showing the data structure of a ring counter register of a terminating modem according to an embodiment of the present invention. According to a preferred embodiment of the present invention, bits D15 to D3 560 are not used as RESERVED bits, and bits D2 to D0 566 store the number of ring counts of the called modem.

6 is a block diagram showing the configuration of a remote destination apparatus according to an embodiment of the present invention.

The remote terminating device is a terminating device for a relay line test according to the present invention, and is provided for performing outgoing test of a power exchange.

The relay line test apparatus described above in FIG. 4 is capable of making and receiving calls and can be connected to the subscriber line of the test exchange. However, the remote destination apparatus is used to configure the loop configuration in the remote destination apparatus, not in the exchange, and is a destination dedicated device.

Hereinafter, a remote destination apparatus according to the present invention will be described with reference to FIG. 6. Referring to FIG. 6, the remote destination apparatus according to the present invention may include a controller 600, a modem 620, a port 620, a display device 615, and the like.

The control unit 600 according to the present invention includes a central processing unit 601 and a memory unit 607. The controller 400 performs a function of looping back test data received through the modem 620 from the power exchange.

According to an embodiment of the present invention, the modem 620 may be implemented as a 56K modem with a built-in function.

According to an embodiment of the present invention, the central processing unit 601 includes a memory controller, and may be directly connected to the memory unit 607 and other peripheral devices without a peripheral interface circuit.

A configuration table of the address decoder of the remote destination apparatus according to the present invention is shown in Table 2.

CS Port Address Device 0x700000-0x700FFF Central processing unit CS0 2B 0x100000-0x1FFFFF Resident memory CS1 2B 0x000000-0x0FFFFF Running memory CS2 1B 0x200000-0x2FFFFF Display device

The address decoder according to an embodiment of the present invention is configured based on a case where the central processing unit 601 is implemented by Motorola's MPC68302.

The memory unit 607 includes a resident memory 603 and an execution memory 607. Here, the resident memory 603 stores firmware including booting and application programs, and firmware downloaded using a protocol such as FTP may be stored. According to an embodiment of the present invention, the resident memory 603 may be implemented as a flash memory.

In addition, the execution memory 607 executes booting and application programs, and may be implemented as an SDRAM according to an embodiment of the present invention.

The relay line test apparatus according to the present invention can test the relay line by transmitting and receiving test data other than voice by connecting a subscriber line with a modem. Therefore, the present invention can detect minute defects that are difficult to detect by voice through analysis of the transmitted and received data.

The display apparatus 615 may provide information on an operation state of the remote destination apparatus.

The relay line test apparatus according to the present invention may display the current state of the relay line test apparatus through an LED not shown in the figure, and may provide a reset function such as power reset, manual reset, software reset, and the like.

According to one embodiment of the invention, it is possible to provide a debug port not shown in the figure. The debug port according to the present invention can monitor the driving state of hardware and software, and can display the state through a display device. In addition, instead of using the modem's error correction function for accurate call quality measurement, the modem can be reset each time to eliminate the test failure caused by the modem failure.

7 is a block diagram showing the overall configuration of a relay line test system according to another preferred embodiment of the present invention.

Referring to FIG. 7, a relay line test system according to the present invention includes a remote control device 200, a relay line test device 210, a remote destination device 245, and a multiplexing device 700.

The multiplexing device 700 is a device for testing a plurality of relay lines connected to the plurality of test exchangers in combination with a plurality of test exchangers.

The remote control apparatus 200 and the relay line test apparatus 210 are connected through a network including a LAN. The remote control apparatus 200 extracts a test target route through a man machine processor (MMP) port of a test exchange. Here, the root path for a test refers to a set of trunks, and a trunk refers to a large-capacity telephone channel installed between two telephone exchange systems, and has a wide bandwidth to simultaneously process voice and data signals.

The plurality of remote receiving devices 245-1, 245-2, ..., 245-n are provided to configure the outgoing relay test of the switching system without looping at the power exchange.

According to an embodiment of the present invention, the relay line test apparatus 210 is connected to the multiplexing apparatus 700 through the subscriber line 215 and the MMC (Man Machine Commander) line 220.

The multiplexing device includes a plurality of subscriber lines 730-1, 730-2, ..., 730-n and MMC (Man Machine Commander) lines 735-1, 735-2, ..., 735-n. Through a plurality of test exchangers 225-1, 225-2, ..., 225-n.

According to the present invention, a plurality of test exchangers 225-1, 225-2, ..., 225-n and power exchangers 235-1, 235-2, ..., 235-n are provided through the multiplexing apparatus 700. The call quality of the relay line (230-1, 230-2, ..., 230-n) can be measured.

Other descriptions are the same as those described above with reference to FIG. 4 and will be omitted.

8 is a block diagram showing the configuration of a multiplexing apparatus according to an embodiment of the present invention.

The multiplexing device according to the present invention is a device capable of matching a relay line test device and a plurality of exchangers. According to one embodiment of the present invention, the multiplexing device can match eight test exchangers using a 3X8 encoder.

When the remote control device generates an exchange identifier corresponding to the test exchanger and transmits it to the relay line test apparatus, the relay line test apparatus generates an electrical signal corresponding to the exchange identifier and transmits it to the multiplexing apparatus.

The multiplexing device may control the connection port with the test exchange corresponding to the exchange identifier to connect the test line corresponding to the system identification with the relay line test apparatus.

Hereinafter, a multiplexing apparatus according to the present invention will be described with reference to FIG. 8.

Referring to FIG. 8, a multiplexing apparatus according to the present invention includes an interface 800, an encoder 825, a relay matrix 820, and the like.

The interface 800 includes a subscriber line interface 805 and a man machine processor (MMP) interface 810. Since the multiplexing apparatus 700 according to the present invention matches the subscriber line using the MMP port, the interface 800 connected to the relay line test apparatus has two subscriber line ports 808 and one MMP port 810. It includes.

According to one embodiment of the present invention, it can be configured with two subscriber line and two RJ11C jack connected to the relay line test apparatus.

The encoder 815 according to the present invention may output an 8-bit system selection signal by inputting a 3-bit system ID. If the system ID is "000", only the first bit of the 8-bit output is low and the remaining 7 bits are high. The 8-bit system selection signal thus output may be used as an input of the relay matrix 820 to be used as a control signal for driving the relay.

 The tip and ring signals transmitted from the subscriber are analog signals and need to be transmitted without distortion to the repeater test device. The signal transmitted and received through the MMP port is also a 24V RS232C signal, which is impossible without distortion with a general TTL signal. Accordingly, the relay matrix 820 is preferably implemented as a mechanical relay having a mechanical switching mechanism rather than an electrical conversion.

 Each port selection signal output from the encoder 815 may be converted into a signal through which a high current may flow through the relay matrix 820 to drive a mechanical relay. Only one of the eight MMP and fixed subscriber ports is driven to connect the MMP port with the subscriber port. Connection is performed by using a relay for mechanical connection, and the connection state can be indicated by using an LED.

That is, the output signal of the encoder is used as a relay control signal of the port connected to the exchange. In response to the output signal of the encoder, the relay matrix 820 switches a port and a short connected to each exchange.

Each port (830-1, 830-2, ... 830-8) connected to each exchanger has two subscriber line ports (835-1, 835-2, ... 835-8) and one MMP ports 840-1, 840-2, ..., and 840-8.

9A and 9B are flowcharts illustrating a method for testing a relay line according to another exemplary embodiment of the present invention.

Through the multiplexing device, a plurality of test exchangers, subscriber lines, and MMC ports are multiplexed to perform a function of matching a plurality of test processors and relay line test devices. When the relay line test system is configured through such a multiplexing device, it is possible to test all the systems with a single relay line test equipment in a country where a large number of exchange systems exist, thereby reducing costs and increasing space utilization.

When the test exchange is selected at the remote control device, the information of the selected exchange in the database can be used to connect the selected exchanger with the relay line test apparatus.

Hereinafter, a method for testing a relay line according to the present invention will be described with reference to FIGS. 9A and 9B.

In step 900, the remote control device sets a test prefix to designate a power exchange. In addition, the remote control apparatus may check the calling party number and the called party number and perform a local call processing test between the calling party and the called party to check the subscriber line status.

And, in step 903, the remote control device generates an exchange identifier corresponding to the test exchange. In step 905, the remote control device sets the route information to be tested. Here, the remote control device assumes that information on the test exchange is already stored by using a man machine commander (MMC) port.

In operation 910, the remote control apparatus transmits a relay line test request signal to the relay line test apparatus, and in operation 915, the relay line test apparatus transmits a loop request signal including a preset calling party number and called party number. Here, the relay line test request signal and the loop request signal include an exchange identifier.

In operation 920, the multiplexing apparatus extracts an exchange identifier included in the loop request signal, and transmits the loop request signal to an exchange corresponding to the exchange identifier in operation 922.

In step 927, the test exchange extracts the prefix included in the loop request signal and transmits the loop request signal to the counter exchange corresponding to the prefix.

The power exchange receiving the loop request signal in step 935 may form a loop in the power exchange or may configure a loop through the remote destination apparatus. Hereinafter, a description will be given based on a case where a loop is configured through a remote destination apparatus as shown in FIGS. 3A and 3B.

When the loop is formed in step 945, the loop formation completion signal arrives at the relay line test apparatus through the power exchange and the test exchange.

The relay line test apparatus which has received the loop formation completion signal in step 950 extracts the pre-set line test data and transmits the test data extracted in step 955 to the remote receiving apparatus through the test exchanger and the power exchanger.

In step 960, the remote receiving apparatus that receives the line test data through the terminating modem loops back the received data. In step 965, the test data thus looped back is previously set through the power exchange and the test exchange. The relay line test apparatus is reached through the incoming dedicated modem connected to the called subscriber line and the called subscriber line.

In step 970, the relay line test apparatus receives LOOP BACK test data through a preset called subscriber line and a call-only modem connected to the called subscriber line.

In operation 975, the relay line test apparatus determines whether an error occurs by comparing the received test data with the transmitted test data, and transmits test result information including the determination result to the remote controller in operation 980. Here, the relay line test apparatus may transmit the looped back test data to the remote control apparatus only when an error occurs.

In operation 989, the remote control apparatus calculates a bit error rate using the looped back test data, and uses the calculated bit error rate to determine the call quality of the relay line. In operation 985, the remote control apparatus stores and displays the bit error rate calculated for the looped back test data.

Others are the same as the relay line test method described above with reference to FIGS. 3A and 3B, and thus descriptions thereof will be omitted.

As described above, the present invention has the effect of testing the relay line through the relay line test apparatus connected to the exchanger.                     

In addition, the present invention also has the effect of reducing the manpower and costs required to test the relay track, and can automatically test the relay track by a predetermined program.

Further, the present invention also has the effect of designating an arbitrary exchanger and a relay line of the exchange period remotely and testing the relay line.

In addition, the present invention also has the effect that it is possible to test a relay line connected to a plurality of exchangers through a multiplexing device with one relay line tester.

In addition, the present invention also has the effect of detecting the fine defects that can not be detected by voice to measure the more accurate trunk line quality.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (17)

A method of testing a relay line in a relay line test device combined with a remote control device and an exchanger, the method comprising: Receiving a relay line test request signal including call setup information and test data from the remote control device, wherein the call setup information includes subscriber line information, relay line information, and the like; Generating a loop request signal including the call setup information and transmitting it to the exchange; Receiving a loop complete signal from the exchange; Sending the test data to the exchange; Receiving LOOP BACK test data from the exchange, the loop back test data being received via a terminating modem included in the relay line test apparatus and a terminating subscriber line connected to the terminating modem; Determining whether an error occurs in the looped back test data; And Transmitting a result of determining whether the error has occurred to the remote control apparatus; Relay track test method comprising a. The method of claim 1, The test data is Relay line test method, characterized in that the 8-bit PCM data. According to claim 1, The loop in the loop completion signal is formed in a call-only device connected to the exchange. According to claim 1, The step of sending the test data to the exchange is The relay line test method, characterized in that made through the originating modem included in the relay line test apparatus and the calling subscriber line connected to the originating modem. delete In the relay line test apparatus, An Ethernet interface for connecting the relay line test device with a remote control device; When the relay line test device receives the relay line test request signal including call setup information and test data from the remote control device, the test data is transmitted and the test data looped back is received to determine whether an error occurs. A memory in which a program configured to determine is stored; An outgoing modem for transmitting test data through an outgoing subscriber line coupled to the relay line testing device; A terminating modem for receiving the LOOP BACK test data through a terminating subscriber line connected to the relay line test apparatus; A Man Machine Processor (MMP) interface for matching with an MMP port of the exchanger; And Control unit for controlling the Ethernet interface, the MMP (MMP) interface, the originating modem, the incoming modem and the memory by a program stored in the memory Relay line test apparatus comprising a. The method of claim 1, The memory unit Resident memory in which firmware is stored; And The execution memory of the firmware to be executed Relay line test apparatus comprising a. The method of claim 6, The MMP (Man Machine Processor) interface is Relay line test apparatus, characterized by using an RS-232C interface. A method for testing a relay line in a remote control device combined with a relay line test device and an exchanger, Generating call setup information and test data, wherein the call setup information includes subscriber line information, relay line information, called party number, and the like; Transmitting a relay line test request signal including the call setup information and test data to a relay line test device; Receiving an error determination result including an LOOP BACK test data from the relay line test apparatus; Calculating a bit rate using the LOOP BACK test data; And And displaying and storing the calculated bit rate, And the relay line test apparatus receives the loopback test data through a receiver modem included in the relay line test apparatus and a receiver subscriber line connected to the receiver modem to determine whether an error has occurred. The method of claim 9, The test data is Relay line test method, characterized in that the 8-bit PCM data. The method of claim 9, Generating an exchange identifier; And inserting the generated exchanger identifier into the relay line test request signal. A memory in which a program is stored; And Including a processor on which the program is executed, The processor is a relay line test system for testing the relay line test method according to any one of claims 9 to 11 by the program. 10. A method for testing a relay line in a relay line test device coupled with a multiplexing device and a remote control device connected to a plurality of exchanges, Receiving a relay line test request signal including call setup information, switch identifier and test data from the remote control device, wherein the call setup information includes subscriber line information, relay line information, called subscriber number, and the like; Generating a loop request signal including the call establishment information and the exchange identifier and transmitting the generated loop request signal to the multiplexing device; Receiving a loop completion signal from the multiplexing device; Transmitting the test data to the multiplexing device; Receiving the LOOP BACK test data from the multiplexing device, the loop back test data being received through a terminating modem included in the relay line test apparatus and a terminating subscriber line connected to the terminating modem; Determining whether an error occurs in the looped back test data; And And transmitting the determination result of the error occurrence to the remote control apparatus. The method of claim 13, The test data is Relay line test method, characterized in that the 8-bit PCM data. The method of claim 13, And the loop setting signal is formed at a call-only device connected to a multiplexing device. The method of claim 13, The step of transmitting the test data to the multiplexing device The relay line test method, characterized in that made through the originating modem included in the relay line test apparatus and the calling subscriber line connected to the originating modem. delete

Images