JP3350620B2 - G3 protocol measurement device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a G3 protocol measuring apparatus for measuring the communication protocol of a G3 facsimile machine and determining whether or not the communication protocol is appropriate. This is related to facilitation of the process.

[0002]

2. Description of the Related Art ITU recommendation T. A G3 protocol measuring device is used to judge the suitability of a facsimile communication protocol conforming to F.30 or a facsimile communication manufacturer's own communication protocol. The conventional G3 protocol measuring device has a monitor function capable of measuring the communication protocol of the facsimile device, detects the communication protocol during transmission and reception by the facsimile device, and displays the result on a screen or a recording sheet. The analyzed result is analyzed by an analyzer to determine whether the communication protocol is appropriate.

[0003]

However, the monitored communication protocol data does not comply with ITU Recommendation T.30. 30 and the ITU Recommendation T.30. It is not easy to analyze whether or not it matches the standard value defined for each facsimile machine maker based on the standard 30.
It required specialized knowledge and quite a long time for analysis. Further, since the analysis of the communication protocol is not easy, the analysis results may vary from analyst to analyst or omission of the analysis, which may be one of the causes of communication failure.

[0004] Further, since it is not easy to reconfirm the analysis result or to reproduce the monitored result in order to take measures against the cause of the communication failure, it is necessary to investigate the cause of the communication failure when it occurs. It was difficult to take quick measures.

Further, communication data recorded on an external recording device such as a digital audio tape recorder (DAT) and modulated by means other than a modem built in the G3 protocol measuring device is used. Could not determine the suitability of the communication protocol.

The present invention has been made in order to improve such disadvantages, and automatically analyzes a measured communication protocol and complies with ITU Recommendation T.30. An error is displayed for each item that is different from the standard value specified in 30 or the standard value specified for each manufacturer of each facsimile machine to clarify the suitability of the communication protocol, and the measurement result and built-in It is an object of the present invention to provide a G3 protocol measuring apparatus capable of easily reproducing communication data modulated by a device other than a modem and making it possible to clarify the suitability of the communication data.

[0007]

A G3 protocol measuring apparatus according to the present invention has a monitor communication control section, a control section, a simulator communication control section and a recording apparatus connection section, and a monitor communication control section. Is ITU Recommendation T. The control unit has a monitor operation processing unit, a simulation operation processing unit, and a recording device read processing unit, and the monitor operation processing unit has a monitor operation processing unit. Communication protocol data detected by the communication control unit and ITU Recommendation T.50 stored in advance. 30. When the comparison result is different, an error message is output. The simulation processing unit is connected to the facsimile communication protocol detected by the monitor communication control unit. The data is converted into simulation data and sent to the communication controller for simulator. The recording device read processing unit simulates communication protocol data recorded in the recording device connected to the recording device connection unit. When the execution of the simulation is instructed, the designated signal is read from the recording device and sent to the communication control unit for the simulator, and the communication control unit for the simulator sends the simulation data from the processing unit for the simulation to the simulation data. Simulator sent when data is sent
A line is concluded by the communication data, a communication protocol equivalent to that of the facsimile machine performing the communication is executed, and the communication simulation data stored in the recording device is sequentially transmitted to the line. The connection with the recording device is managed.

A G3 protocol measuring device according to a second aspect of the present invention has a monitor communication control unit, a control unit, a simulator communication control unit and a recording device connection unit, and the monitor communication control unit is based on ITU Recommendation T. . In accordance with No. 30, a communication protocol independently performed by a maker of each facsimile machine is detected, and the control unit has a monitor processing unit, a simulation processing unit, and a recording device read processing unit. The monitor arithmetic processing unit compares the communication protocol data detected by the monitor communication control unit with the standard value stored in advance for each manufacturer of each facsimile apparatus, and the result of the comparison is compared. When different, an error message is output, and the simulation arithmetic processing unit converts the communication protocol data of the facsimile apparatus detected by the monitor communication control unit into simulation data, and converts the communication protocol data into simulation data. This is sent to the communication control unit, and the recording device reading processing unit is instructed to execute the simulation of the communication protocol data recorded in the recording device connected to the recording device connection unit. At the same time, the designated signal is read from the recording device and sent to the communication control unit for the simulator, and the communication control unit for the simulator, when the simulation data is sent from the arithmetic processing unit for the simulation, A line is concluded based on the received simulation data, a communication protocol equivalent to that of the facsimile machine that was performing the communication is executed, and the communication simulation data recorded in the recording device is sequentially transmitted to the line and recorded. The device connection unit manages connection with an external recording device.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a G3 protocol measuring device has a control unit, a communication control unit for monitoring, a communication control unit for simulator, and a recording device connection unit. And ITU Recommendation T. Communication protocols for facsimile machines complying with ITU Recommendation T.30. In accordance with No. 30, a communication protocol independently performed by a maker of each facsimile apparatus is received by the monitor communication control unit and sent to the control unit. The monitor arithmetic processing unit of the control unit compares the transmitted communication protocol data with the standard value stored in advance, analyzes the measured communication protocol for each item, and displays the analysis result.

The simulation processing unit of the control unit converts the measured communication protocol data into simulation data, sends it to the simulation communication control unit or a recording medium, and transmits the measured communication data. Enables reproduction of the protocol.

The communication control unit for the simulator is equivalent to a facsimile machine which communicates with the transmitted simulation data when the simulation data is transmitted from the processing unit for simulation. The communication protocol is executed to reproduce the situation of the communication failure and clarify the cause of the communication failure.

Further, the communication control unit for the simulator is a communication unit which is recorded on an external recording device such as a digital audio tape recorder (DAT) and modulated by means other than the modem of the communication control unit for the monitor. D to determine if the data is appropriate
The communication simulation data stored in the AT or the like is transmitted and reproduced.

[0013]

FIG. 1 is a block diagram showing a G3 protocol measuring apparatus according to an embodiment of the present invention. As shown in the figure, the G3 protocol measuring apparatus includes a control unit 1, a data storage memory 2 such as a floppy disk, a display unit 3, a monitor communication control unit (monitor CCU) 4, and a simulator communication control unit ( CCU for simulator 5 and recording device connection 6
Having.

The control unit 1 has a CPU 11 for managing the entire apparatus.
ROM 12, RAM 13, monitor processing unit 1
4, simulation processing unit 15, function information table
It has a storage section 16, a protocol sequence table storage section 17, a modem control table storage section 18, and a recording device read processing section 19. The function information table storage 16 stores the ITU Recommendation T. 30 and various functional information on communication protocols conforming to ITU Recommendation T.30. Various function information of different non-standard procedure communication protocols set for each facsimile machine manufacturer in accordance with the standard 30 is stored in advance, and the protocol sequence table storage unit 17 stores IT information.
U Recommendation T. 30 communication protocol sequence and non-standard procedure communication protocol sequence set for each manufacturer
Contains the cans. The modem control table storage unit 18 stores the function information of the digital handshaking command on the sending side (transmitting side or receiving side) for executing the simulation. The recording device read processing unit 19 controls the driving of the recording device connection unit 6 and controls the reading of communication data recorded in the external recording device 7 such as a digital audio tape recorder (DAT). .

The monitor communication controller 4 has a network controller 41, a modem 42, a digital handshaking command flag monitor 43, and a tonal signal detector 44. The monitor communication controller 4 receives the communication protocol of the facsimile machine 8 and receives the communication protocol. To detect. The communication control unit 5 for the simulator also includes a network control unit 51 and a modem 52,
Digital handshaking command flag monitor 5
3. A tonal signal detector 54 is provided, and a line is connected to the exchange 9 to execute a simulation. A recording device connection unit 6 is a communication interface unit (hereinafter, referred to as a communication I / F unit) 6 for managing connection with an external recording device 7 such as a DAT.
One.

The operation when the communication protocol of the facsimile apparatus is measured by the G3 protocol measuring apparatus configured as described above will be described with reference to the flowchart of FIG.

First, the CPU 11 of the control section 1 causes the monitor communication control section 4 to transmit communication protocol data including image information data.
When receiving the digital handshaking command NSF, the low speed modem (300 bps) of the modem 3 confirms whether or not the digital handshaking command NSF has been received (step S1). If NSF is detected, the NSF facsimile information field (F
The manufacturer code is detected by bits 17 to 28 of IF) and set in the RAM 13 (step S2). And N
When the digital handshaking command NSS, which is a response signal to the SF, is detected (step S3), the facsimile information field of the NSS specified by the manufacturer is set based on the set manufacturer code. (F
IF) function information is extracted from the function information table storage 16 (step S4). Thereafter, based on the extracted function information for each manufacturer, a unique communication protocol sequence defined by the manufacturer is extracted from the protocol sequence table storage unit 17, and the modem mode is controlled. The communication protocol data is measured and stored in the RAM 13 (step S5).

In the communication protocol data being measured, a digital handshaking command D is provided after the NSS.
If there is no CS, the measurement of the communication protocol data is repeated again (steps S7 and S12). If there is DCS next to the NSS in the communication protocol data being measured (step S7), the data set in the RAM 13 is reset (steps S8 and S9) and the ITU
Recommendation T. 30 is extracted from the function information table storage unit 16 (step S).
9). The modem mode of the modem 42 of the monitor communication control unit 4 is switched based on the extracted function information table,
The communication protocol data is measured and stored in the RAM 13 (step S11). Further, DIS is detected from the received communication protocol data without detecting NSF (step S).
6) If DCS is subsequently detected (step S
7), ITU Recommendation T. 30 to extract the function information table defined by the communication protocol data table 30 as described above.
Are measured (steps S8 to S11). The CPU 11 repeats the above processing, and when the measurement of the communication protocol data is completed (step S12), the measurement data stored in the RAM 13 is stored in the data storage memory 2 composed of a floppy disk or the like (step S13).

Next, the processing for judging the suitability of the communication protocol data measured as described above will be described with reference to the flowchart of FIG.

The operation of judging the propriety of the communication protocol data is started (step S21). When the facsimile apparatus to be judged is specified, the CPU 11 of the control unit 1 stores the specified facsimile data stored in the data storage memory 2. The communication protocol measurement data is extracted and stored in the RAM 13 (step S2).
2). When the monitor processing unit 14 confirms the NSF from the communication protocol measurement data stored in the RAM 13 (step S23), the NSF facsimile information file is displayed.
Maker (FIF) 17-28 bits
Is detected and set (step S24). And NS
When the NSS, which is a response signal to F, is detected (step S25), based on the detected manufacturer code, the NSS
Non-standard procedure communication defined by the car (independent communication)
The protocol sequence is extracted from the protocol sequence table storage 17 (step S26). The extracted nonstandard procedure communication protocol sequence and the measurement data of the communication protocol are sequentially compared for each item (step S32). As a result of the comparison, if the measurement data of the communication protocol is different from the non-standard procedural communication protocol sequence defined by the manufacturer, an error message is generated and displayed in a different portion. It is displayed on the unit 3 (steps S33, S34). As a result of comparison, if the measurement data of the communication protocol is the same as the non-standard procedure communication protocol sequence defined by the manufacturer, a normal message is generated and displayed on the display unit 3. (Steps S33 and S35).

Further, the monitor arithmetic processing unit 14 has a RAM 1
When a DCS is detected next to the NSS from the measurement data of the communication protocol stored in the communication protocol 3 (step S28), the set manufacturer code is reset and the ITU Recommendation T.3 is detected. 30
The protocol sequence defined by
(Steps S29, S30, S31). This extracted ITU recommendation T. 30 is sequentially compared with the measurement data of the communication protocol for each item, and the measurement data of the communication protocol is determined by ITU Recommendation T.30. If the protocol sequence is different from the protocol sequence defined by S30, an error message is generated and displayed on the display unit 3 (steps S32, S33, S34). Also,
As a result of the comparison, the measurement data of the communication protocol is based on ITU Recommendation T.30. If the protocol sequence is the same as the protocol sequence defined by S30, a normal message is generated and displayed on the display unit 3 (steps S32, S33, S35).

If the NSF is not detected from the communication protocol measurement data but the DIS is detected (step S27), and subsequently the DCS is detected (step S28), the communication protocol measurement data and the ITU recommendation are obtained in the same manner as described above. T. Then, the protocol sequence determined by step 30 is compared to determine whether the measured communication protocol data is appropriate (steps S29 to S35).

The suitability of the measured communication protocol data is automatically determined, and the presence or absence of an abnormality is displayed according to the protocol sequence. Therefore, the suitability of the communication protocol can be easily and accurately confirmed. be able to.

Next, as a result of judging the propriety of the communication protocol data measured as described above, in order to reproduce and confirm the situation of the communication failure or to confirm the reason of the communication failure and to take measures against it. Facsimile machine 8 performing communication
The operation of the simulation processing for executing the communication program data equivalent to the above will be described with reference to the flowchart of FIG.

At the start of the simulation process (step S41), the CPU 11 of the control unit 1 makes the data storage memory 2
Extracts the measurement data of the communication protocol stored in
It is stored in the AM 13 (step S42). When the simulation processing unit 15 confirms the NSF from the communication protocol measurement data stored in the RAM 13 (step S43), the NSF facsimile information field (F)
The manufacturer code is detected by bits 17 to 28 of IF) and set in the RAM 13 (step S44). When the NSS which is a response signal to the NSF is detected (step S45), a non-standard procedure communication (original communication) protocol sequence defined by the manufacturer is determined based on the detected manufacturer code. Protocol sequence
It is extracted from the table storage 17 (step S46). Next, the digital handshaking command in the measurement data of the communication protocol is sequentially transmitted and received with the transmission side command based on the nonstandard procedure communication protocol sequence defined by the extracted manufacturer. It is separated into side commands (step S52). Then, the function information of the digital handshaking command on the sending side (transmitting side or receiving side) for executing the simulation is extracted, and the modem 52 of the communication control unit 5 for the simulator is controlled from this function information. Then, modem control information for transmitting or receiving high-speed data is extracted and set as simulation data in the modem control table storage unit 18 (step S53). After the separation of all the digital handshaking commands of the measurement data of the communication protocol and the extraction of the modem control information are completed, the communication control unit 5 for the simulator transmits the simulation data to the slave. If specified, the simulation data set in the modem control table storage section 18 is recorded in the data storage memory 2, and the data is stored in the communication control section 5 for the simulator. (Step S5)
4, S55). The communication control unit 5 for the simulator establishes a line based on the sequence of the sending side (transmitting side or receiving side) that executes the transmitted simulation and executes the simulation (steps S56 and S57). . The result of the executed simulation is measured by the monitor communication control unit 4, and the monitor arithmetic processing unit 14 determines whether or not the communication protocol is appropriate, and displays the result on the display unit 3 according to the sequence.

The simulation processing unit 15
When the DCS is detected next to the NSS from the communication protocol measurement data stored in the RAM 13 (step S4)
8), the setup data is reset and the ITU recommendation The protocol sequence defined by 30 is extracted from the protocol sequence table storage 17 (steps S49 and S50). Next, ITU recommendation T.1 which extracted the digital handshaking command of the measurement data of the communication protocol. Based on the protocol sequence defined by S.30, the command is sequentially separated into a transmission command and a reception command (step S52).
Then, the function information of the digital handshaking command on the sending side (transmitting side or receiving side) for executing the simulation is extracted, and the modem 52 of the communication control unit 5 for the simulator is controlled from this function information. Then, modem control information for transmitting or receiving high-speed data is extracted and set as simulation data in the modem control table storage unit 18 (step S53). After the separation of all digital handshaking commands from the measurement data of the communication protocol and the extraction of the modem control information have been completed, the simulation processing unit 15 executes the modem control table in the same manner as described above. The simulation data set in the storage unit 18 is recorded in the data storage memory 2 and transferred to the communication control unit 5 for simulation to execute the simulation (step S54).
To S57). Also, from the communication protocol measurement data, N
If the DIS is detected without detecting the SF (step S47) and subsequently the DCS is detected (step S48), the ITU recommendation T.30 is performed in the same manner as described above. Simulation data is extracted based on the protocol sequence defined by 30 and the simulation is executed (step S49).
To S57).

Since the communication protocol equivalent to that of each facsimile machine is executed by using the communication program data measured in this manner, the situation of the communication failure can be reproduced and confirmed. Measures can be taken reliably.

In the above-described simulation processing, a case has been described where, as a result of judging the suitability of the measured communication protocol data, the judgment result is immediately reproduced and confirmed. However, the communication protocol of a plurality of facsimile apparatuses is measured. After judging the suitability, the simulation data subjected to the simulation processing is stored in a data storage memory 2 such as a floppy disk, and a plurality of communication protocol data are collectively and continuously reproduced. Alternatively, communication program data equivalent to each facsimile apparatus may be executed to confirm the reason for the communication failure and take measures against it. The operation in this case will be described with reference to the flowchart of FIG.

When the continuous execution of the simulation is instructed (step S61), the CPU 11 of the control section 1 simulates one communication from the data storage memory 2 in which the simulation data is recorded. -Extract the R
It is stored in the AM 13 (step S62). When the simulation data for one communication is stored in the RAM 13, the CPU 11 transfers the simulation data to the communication control unit 5 for the simulator. The communication control unit 5 for the simulator establishes a line based on the transmitted communication simulation data and executes the simulation (step S).
63, S64). The result of the executed simulation is measured by the monitor communication control unit 4, and the monitor arithmetic processing unit 14 determines whether the communication protocol is appropriate. The measurement result is given the same name as the data name of the executed communication simulation data and recorded in the data storage memory 2 together with the communication protocol determination result (step S).
65). When a simulation for one communication is executed and the measurement result is recorded in the data storage memory 2 (step S66), the CPU 11 reads the data from the data storage memory 2 in which the simulation data is recorded. Simulation data for the next communication is extracted and stored in the RAM 13 (step S67), and the extracted communication simulation data is extracted.
The simulation is executed in the same manner as described above (steps S68, S63 to S66). This processing is
All the communication simulation data recorded in the data storage memory 2 are automatically repeated, and the simulation results based on all the communication simulation data are collected.
After recording the data in the data storage memory 2, the process ends (step S68).

As described above, the simulation is automatically executed for all the communication simulation data recorded in the data storage memory 2, and the result is recorded in the data storage memory 2. The communication test can be performed without the need for a communication test, and the communication test can be performed at midnight or the like when normal communication is not hindered. Further, since the communication simulation data recorded in the data storage memory 2 and the simulation execution result can be quickly checked, the time required for the analysis work can be greatly reduced and the communication failure can be reduced. The cause can be accurately confirmed, and the countermeasure can be taken promptly.

In the above-described simulation processing, a case has been described in which the communication protocol data modulated by the modem 42 of the monitor communication control unit 4 is reproduced to check the suitability of the communication protocol data. Date
The simulation can also be performed by using a computer. For example, a digital audio tape recorder (DA)
A recording device such as T) can also record image signals and the like.
On the other hand, communication data transmitted to the line when facsimile transmission / reception is performed is included in the voice band of 300 to 3400 Hz. Therefore, by responding to the method of recording telephone voice, communication data for facsimile transmission / reception can be recorded in a DAT or the like. The communication data recorded in a recording device such as a DAT is simulated, and communication protocol data equivalent to that of a facsimile machine performing the communication is obtained.
The operation for executing the data operation will be described with reference to the flowchart of FIG.

For example, D attached to the recording device connecting portion 6
When the execution of the simulation of the communication data recorded in the AT 7 is instructed, the CPU 11 of the control unit 11 communicates with the communication I / F.
The control unit 1 and the monitor communication control unit 4 are driven in low impedance through the communication I / F unit 61 by driving the unit 61.
And it is connected to the communication control unit 5 for the simulator (step S71). In this state, the transmission simulation data
When sending data to the line (step S72), the CPU 1
1 operates the network control unit 51 of the simulator communication control unit 5 to access the exchange 9 and, when the line is established and the reception protocol data of the facsimile apparatus 8 is received (steps S73 and S74), the DAT 7 Send out the communication simulation data recorded in the line (step S7).
5). The result of the executed simulation is measured by the monitor communication control unit 4, and the monitor arithmetic processing unit 14 determines whether or not the communication protocol is appropriate and displays the result on the display unit 3. When the line release command signal DCN is detected in the communication simulation data from the facsimile machine 7 or the communication simulation data stored in the DAT 7, the line is released and the simulation processing is terminated (steps S76, S76). S77, S78).

When transmitting the reception simulation data from the communication data recorded in the DAT 7 to the line (step S79), the CPU 11 sends the network control unit 51 of the communication control unit 5 for the simulator. Is operated, and when a linking signal is detected, the line is closed (step S80,
S81). And the communication simulation recorded in DAT7
The data is sent out to the line (step S75). The result of the executed simulation is measured by the monitor communication control unit 4, and the monitor arithmetic processing unit 14 determines whether or not the communication protocol is appropriate and displays the result on the display unit 3. When the line release command signal DCN is detected in the communication simulation data from the facsimile machine 7 or in the communication simulation data stored in the DAT 7, the line is released and the simulation processing is terminated (step S7).
6, S77, S78).

[0034]

According to the present invention, as described above, the ITU
Recommendation T. Communication protocols for facsimile machines complying with ITU Recommendation T.30. The communication protocol independently performed by the maker of each facsimile apparatus is measured in accordance with the standard 30 and the measured communication protocol data is compared with a standard value stored in advance to determine whether the measured communication protocol is appropriate. Analysis is performed for each item and analysis results are displayed, so that the suitability of the communication protocol can be checked easily and accurately, and even those who do not have specialized knowledge can analyze the communication protocol in a short time. Can do well. Therefore, it is possible to prevent the analysis accuracy from being varied among the analysts and to prevent the analysis from leaking, and to perform a stable analysis.

Further, by converting the measured communication protocol data into communication simulation data and executing the measured communication protocol, the cause of the communication failure can be accurately reproduced, and the communication failure can be reduced. The countermeasures corresponding to the factors can be reliably performed, and the results of the countermeasures can be easily confirmed.

Further, when judging the suitability of communication data recorded in an external recording device such as a digital audio tape recorder (DAT) and modulated by means other than the modem of the monitor communication control unit. Then, the communication protocol recorded in the DAT or the like is reproduced by reading the data of the designated signal from the external recording device and sequentially transmitting the data from the communication control unit for the simulator to the line to execute the simulation. Debugging and analysis of communication data recorded in a DAT or the like can be easily performed in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing a communication protocol measurement process of the embodiment.

FIG. 3 is a flowchart showing automatic determination processing of a communication protocol of the embodiment.

FIG. 4 is a flowchart showing a simulation process of the embodiment.

FIG. 5 is a flowchart showing a simulation continuous execution process of the embodiment.

FIG. 6 is a flowchart showing a simulation process of communication data recorded in DAT.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 control unit 2 data storage memory 3 display unit 4 monitor communication control unit (monitor CCU) 5 simulator communication control unit 6 recording device connection unit 8 facsimile device 11 CPU 13 RAM 14 monitor calculation processing unit 15 Simulation processing unit 16 Function information table storage unit 17 Protocol sequence table storage unit 18 Modem control table storage unit 19 Recording device read processing unit

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-261170 (JP, A) JP-A-6-261169 (JP, A) JP-A-6-105112 (JP, A) JP-A-4- 269068 (JP, A) JP-A-4-240957 (JP, A) JP-A-61-212959 (JP, A) JP-A-57-54466 (JP, A) Japanese Utility Model Laid-Open No. 64-25260 (JP, U) Shokai 62-66463 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/00-1/00 108 H04N 1/32-1/36 101

Claims (2)

(57) [Claims] 1. A communication control unit for a monitor, a control unit, a communication control unit for a simulator and a connection unit for a recording device. The control unit has a monitor arithmetic processing unit, a simulation arithmetic processing unit, and a recording device read processing unit, and the monitor arithmetic processing unit has a monitor arithmetic processing unit. Communication protocol data detected by the communication control unit and ITU Recommendation T.50 stored in advance. 30. When the comparison result is different, an error message is output. The simulation processing unit is connected to the facsimile communication protocol detected by the monitor communication control unit. The data is converted into simulation data and sent to the communication controller for simulator. The recording device read processing unit simulates communication protocol data recorded in the recording device connected to the recording device connection unit. -When the execution of the command is instructed, the designated signal is read out from the recording device and sent to the communication control unit for the simulator, and the communication control unit for the simulator receives the simulation data from the processing unit for the simulation. When the data is sent, a line is concluded based on the received simulation data, and a communication protocol equivalent to that of the facsimile machine that was performing the communication is executed. A G3 protocol measuring device, wherein communication simulation data stored in a recording device is sequentially transmitted to a line, and a recording device connection unit manages connection with an external recording device. 2. A monitor communication control unit, a control unit, a simulator communication control unit, and a recording device connection unit. The communication protocol independently performed by the manufacturer of each facsimile machine is detected according to the standard 30. The control unit has a monitor processing unit, a simulation processing unit, and a recording device read processing unit. The monitor arithmetic processing unit communicates with the communication protocol data detected by the monitor communication control unit and stores the communication protocol data stored in advance in each facsimile apparatus.
A comparison is made with a standard value determined for each car, and when the comparison results are different, an error message is output, and the simulation processing unit detects the facsimile apparatus detected by the monitor communication control unit. Simulate communication protocol data
The data is sent to the communication control unit for simulator, and the recording device read processing unit instructs to execute the simulation of the communication protocol data recorded in the recording device connected to the recording device connection unit. When this is done, the designated signal is read from the recording device and sent to the communication control unit for simulator. The communication control unit for simulator receives the simulation data from the arithmetic processing unit for simulation. At that time, a line is concluded based on the received simulation data, a communication protocol equivalent to that of the facsimile machine that was performing the communication is executed, and the communication simulation data recorded in the recording device is sequentially transmitted to the line. The recording device connection unit manages connection with an external recording device.