JP2000278266A - Modem diagnosis method and recording medium - Google Patents

Abstract

(57) Abstract: The present invention provides a modem diagnosis method and a recording medium which enable a plurality of modems with built-in modems to be diagnosed only by a router to be diagnosed. SOLUTION: In the modem diagnosis of a plurality of router devices with built-in modem according to the present invention, a channel control circuit is set to communicate through a modem, and further, a framer and a transceiver are set so that data is looped back by a transceiver which is a final exit of data. Then, a response to communication can be received from within the router device to be diagnosed, so that diagnosis can be performed only by a plurality of router devices with built-in modems to be diagnosed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a modem diagnostic method and recording for diagnosing a modem of a plurality of routers with a built-in modem for interconnecting a plurality of communication networks by using a relay function of a network layer of an open system interconnection architecture. Regarding the medium.

[0002]

2. Description of the Related Art A router device is used between a communication terminal and a communication line in a system for performing network communication, and relays network packets. At this time, the signal transmitted from the communication terminal to the router device is a digital signal, whereas the communication line uses an analog signal or a modulated digital signal. For this reason, in the router device, it is necessary to mutually convert the signal format between the communication terminal and the communication line. It is a modem that is inside the router device and performs this mutual conversion. In this specification, the function of performing mutual conversion between modems is referred to as a communication function of a modem.

[0003] Some modems having a high function have a function of establishing a protocol. The protocol is a rule that defines various items such as the format and timing of information exchanged with the communicating party, and it is possible for communication terminals of different models to communicate by communicating using the same protocol. Become. The function of establishing a protocol by the modem is to call the built-in modem from the built-in modem of the source router to the built-in modem of the destination router, inquire whether or not the predetermined protocol can be handled, and confirm whether or not communication with the predetermined protocol is possible. When a response indicating that handling is possible is received, the subsequent state in which mutual communication is enabled is referred to as protocol establishment.

Here, a diagnostic system as an example of a conventional technique used for modem diagnosis of a plurality of router devices with a built-in modem has a configuration as shown in FIG.

[0005] This system comprises a router 41, a pseudo switch 55, and a router 56. That is, the modem is diagnosed by causing communication between a plurality of routers with built-in modems that face each other with the pseudo exchange 55 interposed therebetween.

[0006] The router device 41 comprises a communication board 42.

The communication board 42 includes a CPU 43 and a memory 4
4, diagnostic mode setting switch 47, flash memory 4
8, an indicator lamp 50, a plurality of channel control circuits, a plurality of modems, a framer 53, and a transceiver 54.

The CPU 43 is a central processing unit and the memory 4
It interprets the program in 4 and performs various processes.

The memory 44 is a main storage device, and is a storage area for a control program 45, a diagnostic program 46, and various data of the communication board.

The diagnostic mode setting switch 47 is used for setting normal use of the modem and execution of a diagnostic program.

The flash memory 48 is a rewritable memory used for storing a diagnostic program 49 for diagnosing a modem in advance.

The display lamp 50 is a lamp for displaying a diagnosis result.

The channel control circuit 51 transmits and receives data between the memory 44, the modem 52, and the framer 53, independently of the operation of the CPU 43, based on an instruction from the CPU 43.

The modem 52 performs signal format conversion such as mutual conversion between digital signals and analog signals between the channel control circuit 51 and the framer 53, and performs a protocol establishment process when a protocol establishment function is provided.

The framer 53 collects data transmitted from the channel control circuit or the modem into transfer units and transfers the data to the transceiver 54, or divides the data transmitted from the transceiver 54 into a plurality of partitions in a certain partition unit. And passes it to a modem or a channel control circuit.

The transceiver 54 exchanges data between the framer 53 and the communication line.

The simulated exchange 55 accommodates a plurality of communication paths,
An exchange having a function of connecting a communication path on which a call has occurred to a specified communication path.

The router device 56 is different from the router device 41 in that the diagnostic program 6 stored in the flash memory 63 in advance.
4 has the same function except that the content of the item 4 is different. Therefore, description of the configuration is omitted.

The diagnostic program 64 is a program for causing the router device 41 to execute the diagnostic program so that a response can be returned from the router device 56 when performing various communications with the router device 56. This is, for example,
When arbitrary data is transmitted to the router device 56 by executing the diagnostic program in the router device 41, it is not known whether the data has just arrived just by transmitting the data. The destination router device 56 waits for data transmission, and makes a response such as sending back the received data in its entirety. The router device 41 compares the data returned in the response with the transmitted data, thereby obtaining the data. It can be determined whether transmission is normal. The diagnostic program 64 is a program that makes these responses.

Next, as an example of modem diagnosis based on a modem diagnosis system of a plurality of routers with a built-in modem as an example of the prior art shown in FIG. 5, a diagnosis of a communication function and a protocol in a case where the modem has a protocol establishment function will be described. The method of diagnosing the establishment function will be described below.

First, when diagnosing the communication function of the modem, the diagnostic mode setting switch 62 of the communication board 57 is set to a mode for executing the diagnostic program of the modem, and the power of the router device 56 is turned on.

When the power of the router device 56 is turned on, C
The PU 58 reads the control program 60 stored in the memory 59, and follows the instruction thereof to set the diagnostic mode setting switch 62.
Is read, and when it is interpreted that the execution of the diagnostic program of the modem is specified, the diagnostic program 64 for responding to the diagnosis of the communication function by the diagnostic program of the modem stored in the flash memory 63 in advance is stored in the memory 5.
9 into the diagnostic program 61 and the diagnostic program 6
Start 1

The CPU 58 sequentially interprets and executes the diagnostic program 61, sets the channel control circuit 65 so that communication can be performed through the modem 66, sets the framer 67 and the transceiver 68 to be communicable, and transmits data from the router device 41. Wait.

Next, the diagnostic mode setting switch 47 of the communication board 42 is set to the mode for executing the diagnostic program of the modem, and the power of the router 41 is turned on.

When the power of the router device 41 is turned on, C
The PU 43 reads the control program 45 stored in the memory 44, and follows the instruction thereof to set the diagnostic mode setting switch 47.
Is read, and when it is interpreted that the execution of the modem diagnostic program is specified, the diagnostic program 49 for diagnosing the communication function is read into the diagnostic program 46 of the memory 44 by the modem diagnostic program stored in the flash memory 48 in advance. Then, the diagnostic program 46 is started.

The CPU 43 sets the channel control circuit 51 so as to perform communication through the modem 52 by sequentially interpreting and executing the diagnosis program 46, sets the framer 53 and the transceiver 54 to be communicable, and makes the channel control circuit 51 diagnose various communication functions. Is executed.

The diagnostic program 46 read from the memory 44 by the channel control circuit 51 based on the instruction of the CPU 43
Are executed through the modem 52, the framer 53, and the transceiver 54, and the data transmitted from the transceiver 54 to the line is transmitted to the pseudo switch 55.
Through the router device 56.

In the router device 56, a transceiver 68,
Framer 67, modem 66, channel control circuit 65, C
Data is sequentially received on the path of the PU 58, and a response following the reverse path is returned by the execution of the diagnostic program 61.

In the router device 41, the channel control circuit 51
Stores the responses returned by the route of the transceiver 54, the framer 53, and the modem 52 sequentially in the memory 44,
The end of execution of each diagnosis instruction is reported to the CPU 43.

The CPU 43 waits for completion of all the communication function diagnosis instructions of the modem, compares the response stored in the memory 44 with the expected value of the diagnosis program 46, and displays the quality of the communication function of the modem according to the comparison result. For example, when the communication function of the modem is good, a green lamp is turned on, and when the communication function of the modem is bad, a notification is made by turning on a red lamp or the like, so that the diagnosis result can be understood.

When the modem has a protocol establishing function, the method of diagnosing the protocol establishing function is as follows.

First, the diagnostic mode setting switch 62 of the communication board 57 is set to the mode for executing the diagnostic program of the modem, and the power of the router device 56 is turned on.

When the power of the router device 56 is turned on, C
The PU 58 reads the control program 60 stored in the memory 59, and follows the instruction thereof to set the diagnostic mode setting switch 62.
When the setting is read and it is interpreted that the execution of the modem diagnostic program is designated, the modem diagnostic program stored in advance in the flash memory 63 returns various responses to the protocol establishment function diagnosis as the receiving modem. The diagnostic program 64 for reading is loaded into the diagnostic program 61 in the memory 59, and the diagnostic program 61 is started.

The CPU 58 sequentially interprets and executes the diagnostic program 61, sets the channel control circuit 65 so as to perform communication through the modem 66, sets the framer 67 and the transceiver 68 to be communicable, and transmits the data from the router 41. Wait.

Next, the diagnostic mode setting switch 47 of the communication board 42 is set to the mode for executing the diagnostic program of the modem, and the power of the router device 41 is turned on.

When the power of the router device 41 is turned on, C
The PU 43 reads the control program 45 stored in the memory 44, and follows the instruction thereof to set the diagnostic mode setting switch 47.
Is read, and when it is interpreted that the execution of the diagnostic program of the modem is specified, the diagnostic program 49 for diagnosing the protocol establishment function is stored in the diagnostic program 46 of the memory 44 by the modem diagnostic program stored in the flash memory 48 in advance. Then, the diagnostic program 46 is started.

The CPU 43 sets the channel control circuit 51 to perform communication through the modem 52 by sequentially interpreting and executing the diagnostic program 46, sets the framer 53 and the transceiver 54 to be communicable, and transmits protocol packet communication to the channel control circuit 51. Is executed.

The diagnostic program 46 read from the memory 44 by the channel control circuit 51 based on the instruction of the CPU 43
The execution instruction of the protocol packet communication of
The data is executed through the framer 53 and the transceiver 54, and the data transmitted from the transceiver 54 is transmitted to the pseudo switch 55.
Is sent to the router device 56 through

In the router device 56, a transceiver 68,
A communication for inquiring whether or not a predetermined protocol can be handled is performed to the modem 66 on the route of the framer 67.
Returns a response following the reverse route.

In the router device 41, the modem 52 determines the response returned on the route of the transceiver 54 and the framer 53, and sends a response indicating whether a protocol is established to the channel control circuit 51.
The information is stored in the memory 44 via the CPU 43 and the completion of the protocol establishment function diagnosis is reported to the CPU 43.

The CPU 43 waits for the report of the completion of the protocol establishment function diagnosis from the channel control circuit 51, and
4 is compared with the expected value stored in the diagnostic program 46, and based on the result of the comparison, whether the protocol establishment function of the modem is good or not is displayed on a display lamp 50. For example, when the protocol establishment function of the modem is good, a green lamp is turned on. In the case of a failure, a red lamp is lit or the like so that the diagnosis result can be understood.

[0042]

However, in the case of the above method, when diagnosing the modems of the plurality of routers with a built-in modem, two routers with a built-in modem and a pseudo switch are prepared and a plurality of pseudo-switches are prepared. Diagnosis must be performed by facing a router device with a built-in modem with a pseudo-exchanger interposed therebetween, and there has been a problem that work efficiency is low and equipment costs are high.

Therefore, an object of the present application is that the diagnosis of the modem of a plurality of routers with a built-in modem can be executed only by the plurality of routers with a built-in modem to be diagnosed.

As an example of modem diagnosis of a plurality of routers with a built-in modem, diagnosis of a communication function can be performed only by a plurality of routers with a built-in modem to be diagnosed.

Another example of the modem diagnosis of a plurality of routers with a built-in modem is that the diagnosis of the protocol establishment function when the modem has a protocol establishment function can be executed only by the plurality of routers with a built-in modem to be diagnosed. .

[0046]

In order to solve the above-mentioned problems, the present invention has proposed the following diagnostic method.

In the modem diagnosis of a plurality of router devices with a built-in modem according to the present invention, the channel control circuit is set so as to communicate through the modem, and the framer and the transceiver are set so that the data is turned back at the transceiver which is the final exit of the data. Thus, a response to communication can be received from within the router device to be diagnosed, so that diagnosis can be performed only by a plurality of router devices with built-in modems to be diagnosed.

As an example of the modem diagnosis of a plurality of routers with a built-in modem, the communication function is diagnosed by setting a channel control circuit so as to perform communication through a modem, and further turning the data back at the transceiver which is the final exit of the data. A framer and a transceiver are set so that a response to communication can be received from within the router device to be diagnosed, so that diagnosis can be performed only by a plurality of router devices with built-in modems to be diagnosed.

As another example of the modem diagnosis of a plurality of routers with a built-in modem, when the modem has a protocol establishment function, the diagnosis of the protocol establishment function is performed by setting the data return setting in the transceiver between two channels. A target channel control circuit, a framer, and a transceiver are set so as to be able to perform protocol packet communication between two channels, so that diagnosis can be performed only by a plurality of routers with built-in modems to be diagnosed.

[0050]

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

The present invention relates to a router device 1 with a plurality of built-in modems.
It is composed of

The router device 1 comprises a communication board 2.

The communication board 2 includes a CPU 3, a memory 4, a diagnostic mode setting switch 7, a rewritable memory 8, and a display 1.
0, channel control circuit 11, channel control circuit 13, modem 12, modem 14, framer 15, transceiver 1
6 is comprised.

The CPU 3 is a central processing unit, interprets programs in the memory 4, and performs various processes.

The memory 4 is a main storage device, and is a storage area for a control program 5, a diagnostic program 6, and various data of the communication board.

The diagnostic mode setting switch 7 is used for setting normal use of the modem and execution of the diagnostic program.

The rewritable memory 8 is a rewritable memory used for storing a diagnostic program 9 for diagnosing a modem in advance.

The display 10 is a device for displaying a diagnosis result.

The channel control circuit 11 communicates between the memory 4, the modem 12 and the framer 15 based on an instruction from the CPU 3.
Data transfer is performed independently of the operation of the CPU 3.

The channel control circuit 13 communicates between the memory 4, the modem 14, and the framer 15 based on an instruction from the CPU 3.
Data transfer is performed independently of the operation of the CPU 3.

The modem 12 performs signal format conversion such as mutual conversion between digital signals and analog signals between the channel control circuit 11 and the framer 15, and performs protocol establishment processing when a protocol establishment function is provided.

The modem 14 performs signal format conversion such as mutual conversion between digital signals and analog signals between the channel control circuit 13 and the framer 15, and performs protocol establishment processing when a protocol establishment function is provided.

The framer 15 collects data transmitted from the channel control circuit or the modem into transfer units and transfers the data to the transceiver 16, or divides the data transmitted from the transceiver 16 into a plurality of partitions in a certain partition unit. And passes it to a modem or a channel control circuit.

The transceiver 16 exchanges data between the framer 15 and the communication line.

Next, the method of diagnosing a plurality of routers with a built-in modem according to the present invention will be described with reference to the configuration diagram of FIG. 1 based on a diagnosis example of a communication function and a protocol establishment function.

First, when diagnosing the communication function of the modem, the diagnostic mode setting switch 7 of the communication board 2 is set to the mode for executing the diagnostic program of the modem, and the router 1
Turn on the power.

When the power of the router device 1 is turned on, the CP
U3 reads the control program 5 stored in the memory 4, reads the setting of the diagnostic mode setting switch 7 according to the instruction, interprets that the execution of the diagnostic program of the modem is specified, and stores it in the rewritable memory 8 in advance. The diagnostic program 9 for diagnosing the communication function by the diagnostic program for the modem is read into the diagnostic program 6 in the memory 4 and the diagnostic program 6 is started.

The CPU 3 sequentially interprets and executes the diagnostic program 6, sets the channel control circuit 11 so as to perform communication through the modem 12, and further sets the framer 15 and the transceiver so that the data is looped back by the transceiver 16 which is the final exit of the data. 16 and the channel control circuit 1
1 is instructed to execute various communication function diagnoses.

The channel control circuit 11 issues an instruction to execute various communication function diagnostics of the diagnostic program 6 read from the memory 4 based on the instruction of the CPU 3 based on the instruction of the modem 3 and the framer 1.
5. The data executed by the transceiver 16 and returned by the data wrapping of the transceiver 16
5, the processing is performed on the route of the modem 12, and the channel control circuit 11. The channel control circuit 11 sequentially stores the responses in the memory 4 and reports to the CPU 3 the end of the execution of each diagnostic instruction.

The CPU 3 waits for the completion of the diagnosis of the communication function of the modem, compares the response stored in the memory 4 with the expected value of the diagnosis program 6, and determines whether the communication function of the modem is good or not based on the comparison result. Displayed at 10 so that the diagnosis result can be understood. As a result, the communication function of the modem can be diagnosed only by a plurality of routers with a built-in modem to be diagnosed.

When the modems of a plurality of routers with a built-in modem have a protocol establishing function, the method of diagnosing the protocol establishing function is as follows.

First, the diagnostic mode setting switch 7 of the communication board 2 is set to the mode for executing the diagnostic program of the modem, and the power of the router 1 is turned on.

When the power of the router 1 is turned on, the CP
U3 reads the control program 5 stored in the memory 4, reads the setting of the diagnostic mode setting switch 7 according to the instruction, interprets that the execution of the diagnostic program of the modem is specified, and stores it in the rewritable memory 8 in advance. The diagnostic program 9 for the protocol establishment function diagnosis is read into the diagnostic program 6 in the memory 4 by the diagnostic program for the modem, and the diagnostic program 6 is started.

The CPU 3 sequentially interprets and executes the diagnostic program 6, and executes the channel control circuit 1 so that the return setting in the transceiver 16 can be communicated between the two channels.
1. The channel control circuit 13, the framer 15, and the transceiver 16 are set, and thereafter, the channel control circuit 11 is instructed to establish a protocol with the modem 14.

When the channel control circuit 11 receives the instruction from the CPU 3 and instructs the modem 12 to establish a protocol, the modem 12 inquires of the modem 14 via the framer 15, transceiver 16, and framer 15 whether or not a predetermined protocol can be handled. Packet communication is performed, and a response is sent from the modem 14 to the channel control circuit 11 by a response following a reverse path to the channel control circuit 11.

Next, the channel control circuit 11
2 is stored in the memory 4 and the completion of the protocol establishment function diagnosis is reported to the CPU 3.

When the CPU 3 receives the report of the completion of the diagnosis of the protocol establishment function of the channel control circuit 11, the CPU 3 compares the response stored in the memory 4 with the expected value of the diagnosis program 6, and, based on the result of the comparison, determines the protocol establishment function of the modem. Pass / fail is displayed on the display 10. Thus, the diagnosis of the protocol establishment function of the modem can be performed only by the router device having the built-in modem.

As described above, the method for diagnosing a plurality of routers with a built-in modem according to the present invention sets the channel control circuit so as to perform communication through the modem, and returns the data at the transceiver which is the final exit of the data. A framer and a transceiver are set so that a response to communication can be received from within the router device to be diagnosed, so that diagnosis can be performed only by a plurality of router devices with built-in modems to be diagnosed.

In the modem diagnosis of a plurality of routers with a built-in modem shown in FIG. 1, the channel control circuit is set so as to communicate through the modem, and the framer and the transceiver are set so that the data is turned back at the transceiver which is the final exit of the data. By setting, a program for realizing a function of diagnosing a modem by receiving a response to communication from within the router device to be diagnosed is recorded on various suitable computer-readable program recording media.

[0080]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, as one embodiment of the present invention, diagnosis of a communication function and a protocol establishment function of a modem of a plurality of ISDN routers with a built-in modem will be described with reference to the drawings.

First, the configuration of an embodiment of the present invention shown in FIG. 2 will be described.

The present invention comprises an ISDN router device 21.

The ISDN router device 21 includes a communication board 22
Consists of

The communication board 22 includes a CPU 23 and a memory 2
4, diagnostic mode setting switch 27, flash memory 2
8. A plurality of B-channel control circuits including a display lamp 30, a B-channel control circuit 31, a B-channel control circuit 33, a D-channel control circuit, a plurality of modems including a modem 32, a modem 34, a framer 35, and a transceiver. 36.

The CPU 23 is a central processing unit and the memory 2
It interprets the program in 4 and performs various processes.

The memory 24 is a main storage device, and is a storage area for a control program 25, a diagnostic program 26, and various data of the communication board.

The diagnostic mode setting switch 27 is used for setting normal use of the modem and execution of the diagnostic program.

The flash memory 28 is a rewritable memory used for storing a diagnostic program 29 for diagnosing a modem in advance.

The display lamp 30 comprises a plurality of lamps for displaying the diagnosis results.

The B-channel control circuit 31 sends the memory 24, the modem 32, the framer 35
In between, data is exchanged independently of the operation of the CPU 23.

The B-channel control circuit 33 is controlled by the memory 24, the modem 34, the framer 35
In between, data is exchanged independently of the operation of the CPU 23.

The modem 32 performs mutual conversion between the digital signal and the modulated digital signal between the B channel control circuit 31 and the framer 35 and establishes a protocol.

The modem 34 performs mutual conversion between a digital signal and a modulated digital signal between the B channel control circuit 33 and the framer 35 and establishes a protocol.

The framer 35 collects data transmitted from a plurality of B-channel control circuits, D-channel control circuits, or a plurality of modems into transfer units and transfers the data to the transceiver 36, or stores data transmitted from the transceiver 36. After being divided into a plurality of sections for each section, the data is passed to a B-channel control circuit, a D-channel control circuit, or a modem.

The transceiver 36 exchanges data between the framer 35 and the communication line.

Next, a plurality of ISDNs with built-in modems according to an embodiment of the present invention will be described with reference to the block diagram and the flow chart of FIG.
The method for diagnosing the communication function and the protocol establishment function of the modem of the router device is as follows.

First, a method for diagnosing the communication function of the modem will be described with reference to the flowchart of FIG.

Step ST01: The diagnostic mode setting switch 27 of the communication board 22 is set to the mode for executing the diagnostic program of the modem, and the power of the ISDN router 21 is turned on.

Step ST02: ISDN router device 2
1 is turned on, the CPU 23 reads the control program 25 stored in the memory 24, reads the setting of the diagnostic mode setting switch 27 according to the instruction, and interprets that the execution of the diagnostic program of the modem is specified. Diagnostic program 2 for diagnosing a communication function by a modem diagnostic program stored in the flash memory 28 in advance
9 is read into the diagnostic program 26 in the memory 24, and the diagnostic program 26 is started.

Step ST03: The CPU 23 sequentially interprets and executes the diagnostic program 26, sets the B channel control circuit 31 so as to perform communication through the modem 32, and returns the data to the transceiver 36 which is the final exit of the data. The framer 35 and the transceiver 36 are set.

Step ST04: Next, the diagnostic program 26 is sequentially interpreted and executed to execute the B-channel control circuit 3.
1 is instructed to execute various communication function diagnoses.

The diagnostic program 2 read from the memory 24 by the B channel control circuit 31 based on the instruction of the CPU 23
6 is executed through the modem 32, the framer 35, and the transceiver 36, and the data returned by the data wrapping of the transceiver 36 is processed through the path of the framer 35, the modem 32, and the B channel control circuit 31. , The B channel control circuit 31 sequentially stores the responses in the memory 24 and reports to the CPU 23 the end of execution of each diagnostic instruction.

The CPU 23 waits until all the diagnostics of the communication function of the modem are completed, compares the response stored in the memory 24 with the expected value of the diagnostic program 26, and indicates whether the communication function of the modem is good or not according to the comparison result. For example, a green lamp is lit in the case of good and a red lamp is lit in the case of bad so that the diagnosis result can be understood.

When the modems of a plurality of ISDN routers with a built-in modem have a protocol establishing function, a method of diagnosing the protocol establishing function will be described below with reference to the flowchart of FIG.

Step ST11: The diagnostic mode setting switch 27 of the communication board 22 is set to the mode for executing the diagnostic program of the modem, and the power of the ISDN router 21 is turned on.

Step ST12: ISDN router device 2
1 is turned on, the CPU 23 reads the control program 25 stored in the memory 24, reads the setting of the diagnostic mode setting switch 27 according to the instruction, and interprets that the execution of the diagnostic program of the modem is specified. The diagnostic program 29 of the protocol establishment function diagnosis is read into the diagnostic program 26 of the memory 24 by the modem diagnostic program stored in the flash memory 28 in advance.
The diagnostic program 26 is started.

Step ST13: The CPU 23 sequentially interprets and executes the diagnostic program 26, and
Channel control circuit 31 and B channel control circuit 3 so that the return setting in
3. Set the framer 35 and the transceiver 36.

Step ST14: Next, by sequentially interpreting and executing the diagnostic program 26, the B channel control circuit 31 is instructed to establish a protocol with the modem 34.

When the B channel control circuit 31 instructs the modem 32 to establish a protocol, the modem 32
5. Modem 3 on the path of transceiver 36 and framer 35
4 by sending a REQ signal by protocol packet communication for inquiring whether or not a predetermined protocol can be handled, and receiving an ACK signal from the modem 34 when the handling is possible and a NACK signal when the handling is impossible by following the reverse route to receive a response. A response is sent to the B channel control circuit 31 as to whether a protocol can be established.

Next, the B channel control circuit 31 stores the response of the modem 32 in the memory 24 and
3 reports the end of the protocol establishment function diagnosis.

When the CPU 23 receives the report of the end of the protocol establishment function diagnosis of the B channel control circuit 31, the CPU 23
4 is compared with the expected value of the diagnostic program 26, and based on the result of the comparison, whether the protocol establishment function of the modem is good or not is indicated on the display lamp 30 by, for example, a green lamp is lit if it is good, and a red lamp is lit if it is bad. Display with
Diagnosis results are understood.

The present invention can be applied to modem diagnosis of a plurality of router devices with a built-in modem.

As an example of modem diagnosis of a plurality of router devices with a built-in modem, the present invention can be applied to diagnosis of communication functions.

Further, as another example of the modem diagnosis of a plurality of routers with a built-in modem, when the modem has a protocol establishment function, the present invention can be applied to the diagnosis of the protocol establishment function.

[0115]

According to the present invention, in the modem diagnosis of a plurality of routers with a built-in modem, diagnosis can be performed only with a plurality of routers with a built-in modem to be diagnosed.

As an example of a modem diagnosis of a plurality of routers with a built-in modem, in a communication function diagnosis, diagnosis can be performed only with a plurality of routers with a built-in modem, which is effective in improving work efficiency and suppressing equipment costs. .

Further, as another example of the modem diagnosis of a plurality of routers with a built-in modem, in the diagnosis of the protocol establishment function when the modem has a protocol establishment function, the diagnosis can be made only by the plurality of routers with a built-in modem. This is effective in improving work efficiency and suppressing equipment costs.

[Brief description of the drawings]

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

FIG. 2 is a configuration diagram of an embodiment of the present invention.

FIG. 3 is a diagnosis flowchart of a communication function of a modem of a plurality of router devices with a built-in modem as one embodiment of the present invention;

FIG. 4 is a diagnostic flowchart of a protocol establishing function of a modem of a plurality of router devices with a built-in modem as another embodiment of the present invention.

FIG. 5 is a diagram illustrating a configuration of a modem diagnostic system of a plurality of router devices with a built-in modem as an example of the related art.

[Explanation of symbols]

 Reference Signs List 1 router device 2 communication board 3 CPU 4 memory 5 control program 6 diagnostic program 7 diagnostic mode setting switch 8 rewritable memory 9 diagnostic program 10 display 11, 13 channel control circuit 12, 14 modem 15 framer 16 transceiver

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04M 3/26 H04L 11/20 B 11/00 303 13/00 315A F term (Reference) 5B048 AA05 CC02 CC03 DD01 DD09 FF04 5K019 AA08 BA51 CC14 CC15 CC16 CD01 DB02 5K030 GA14 HB19 HC04 HD03 JA09 JA10 KA01 KA02 MC02 5K035 AA04 AA07 BB04 CC07 EE01 FF01 GG06 HH07 KK01 5K101 KK20 LL03 MM05 RR05 VV03

Claims (4)

[Claims] 1. A method for diagnosing modems of a plurality of routers with a built-in modem, comprising: setting a channel control circuit so as to communicate through a modem; And diagnosing the modem by setting the following. 2. A method for diagnosing a communication function, comprising the steps of: setting a channel control circuit (11) so as to communicate through a modem (12) when diagnosing a communication function; By setting the framer (15) and transceiver (16) to wrap data,
The method according to claim 1, further comprising diagnosing a communication function of the modem. 3. A method of diagnosing a modem, comprising the steps of: diagnosing a protocol establishing function;
1), a channel control circuit (13), and a framer (1).
5) and the transceiver (16) are set, and protocol packets are communicated between the two channels.
The method according to claim 1, further comprising diagnosing a protocol establishment function of the modem. 4. A recording medium for storing a program for diagnosing modems of a plurality of routers with a built-in modem, comprising: setting a channel control circuit in a computer so as to communicate through the modem; A computer-readable recording medium on which a program for executing a procedure for diagnosing a modem is set by setting a framer and a transceiver so that data is folded back in the computer.