JPH03262237A - Test equipment for data terminal equipment - Google Patents

Abstract

PURPOSE:To attain the test to all delay conditions without use of a real line by forming a delay transmission data from a transmission data including a delay data, sending the data to a terminal equipment via a MODEM and analyzing the received data from the terminal equipment and a reception delay data by the measurement for a prescribed time. CONSTITUTION:Transmission information generated by a transmission information generating section 21 of a test equipment 1 is separated into a transmission data and a delay data by a data analysis section 21 of a transmission data delay section 13, the transmission data is stored tentatively in an I/F 32 and a delay transmission data is sent to a terminal equipment such as a facsimile equipment 2 via a MODEM 15 from the I/E 32 via a transmission timer 33 applying the transmission delay data. A reception data outputted from the I/F34 receiving the reception information from the equipment 2 in response thereto via the MODEM 15 and a received delay data measured by a reception timer 35 via I/F 32,34 are fed to a reception information analysis section 22 via a data synthesis section 36 to test the equipment 2. Through the constitution above, the test to all delay conditions is implemented without use of a real line such as an international line with a long delay time.

Description

[Detailed Description of the Invention] [Summary] The purpose of this invention is to provide a test device for testing all delay conditions considered necessary for devices for testing data terminals such as facsimile machines. A test device for testing the data terminal by transmitting and receiving data to and from the data terminal via a transmission information generating means for generating transmission information including transmission data and transmission delay data; a transmission delay means for delaying data by a time based on the transmission delay data and transmitting the data to the modem; and clocking the time from the transmission of the transmission data to the data terminal until the reception of the reception data from the data terminal. and reception delay data generation means for generating reception delay data, and reception information analysis means for analyzing the operating state of the data terminal based on the reception data and the reception delay data. .

[Industrial application field]

The present invention relates to an apparatus for testing data terminals such as facsimile machines.

With the development of network communications in recent years, the types of lines connected to data terminals such as facsimile machines, data communication equipment, and PC communication equipment have become diverse. Even ultra-high-speed distance communications have become commonplace.

Therefore, it is necessary for the data terminal to have sufficient margin for such various communications, especially for international communications where data delay times are long.

[Prior Art] Conventionally, an actual line test using an actual line has been carried out to test whether a facsimile apparatus can adapt to various line conditions.

For example, by using a facsimile machine with the same specifications as the facsimile machine under test, or another facsimile machine whose specifications and operating characteristics are fully understood, as the other party's device for testing, the facsimile machine and the facsimile machine under test can be Tests are being conducted to verify that communication failures do not occur due to factors such as data delays by actually communicating with the Internet using international communication lines.

[Problem to be solved by the invention]

However, in the above-mentioned actual line test, it is not possible to test for all delay conditions.

In other words, there are physical and economic restrictions on the test points on earth where the test partner equipment can be installed, and the route of the line connected for communication changes every time a connection is made, so even if the line is connected to the same test point. Due to factors such as differences in distance and the fact that the quality of lines (especially wireless communication lines) fluctuates depending on weather conditions and delay times change, it is practically impossible to conduct tests that satisfy all delay conditions. It is possible.

Therefore, when a facsimile machine is actually used for international communications, etc., there is no possibility that communication problems will occur under special circumstances such as the line route and weather conditions mentioned above. I could not say it.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a test device for testing various delay conditions considered necessary.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the test device according to the present invention has the following features:
As shown in FIG.
This is a test device for testing the data terminal 2 by transmitting and receiving data to and from the transmitter, and includes a transmitting information generating means 2I that generates transmitting information TF including transmitting data TD and transmitting delay data TT; The modem 15 delays the data TD by a time based on the transmission delay data TT.
and a reception delay unit 13 for generating reception delay data RT by measuring the time from the transmission of the transmission data TD to the data terminal 2 to the reception of the reception data RD from the data terminal 2. It comprises a data generating means 35, and a received information analyzing means 22 for analyzing the operating state of the data terminal 2 by uncovering the received data RD and the received delayed data RT.

[Operation] The transmission information generating means 21 generates transmission information TF including transmission data TD and transmission delay data TT.

The transmission data delay means 13 delays the transmission data TD by a time based on the transmission delay data TT, and transmits the delayed transmission data to the modem 15.

The reception delay data generating means 35 generates reception delay data R by substituting the time from the transmission of the transmission data TD to the data terminal 2 to the reception of the reception data RD from the data terminal 2.
Generate T.

The reception information analysis means 22 analyzes the operating state of the data terminal 2 based on the reception data RD and reception delay data RT.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a test apparatus 1 according to the present invention.

The test apparatus 1 includes a host computer 11 and a data delay control section 12.

The host computer 11 includes a transmission information generation section 21 that generates transmission information TF, and a reception information analysis section 22 that analyzes the operating state of the facsimile machine 2 based on reception information RF.
have.

FIGS. 2(a) and 2(b) are diagrams showing the configuration of transmission information DF and reception information RF.

The transmission information TF is composed of transmission data TD, transmission delay data TT indicating a time to delay transmission of the transmission data TD, and other control data (not shown).

The reception information RF includes reception data RD and reception delay data RT indicating a delay time from the end of transmission of the transmission data TD to the reception of the reception data RD.

The transmission delay data TT and reception delay data RT consist of 8-bit data representing, for example, $00 to FF ($ indicates a hexadecimal number), and for example, a maximum of 4 bits in 16 millisecond increments.
Seconds can be expressed.

The data delay control section 12 includes a transmission data delay section 13, a reception information generation section 14, and a modem 15.

The transmission data delay section 13 includes a data analysis section 31, a transmission interface section 32, and a transmission timer 33.

The data analysis unit 31 analyzes the transmission information TF and separates it into transmission delay data TT and transmission data TD.

The transmission interface section 32 temporarily stores the transmission data TD, and transmits the stored transmission data TD to the modem 15 in response to a transmission start signal Sl from the transmission timer 33. The transmission interface section 32 includes an interface circuit with the modem 15.

The transmission timer 33 is set based on the transmission delay data TT, and outputs a transmission start signal Sl to the transmission interface unit 32 when timing ends.

The reception information generation section 14 includes a reception interface section 34, a reception timer 35, and a data synthesis section 36.

The reception interface unit 34 transmits the reception data RD to the data synthesis unit 36, and outputs a clock signal S2 to the reception timer 35 at the timing when the reception data RD is input.

The reception timer 35 starts timing from the end of transmission of the transmission data TD, and receives the timing signal S from the reception interface section 34.
2, and the time during that time is received delay data RT.
The data is sent to the data synthesis section 36 as a.

The data synthesis section 36 creates reception information RF from the reception data RD and reception delay data RT and outputs it to the reception information analysis section 22 .

The above-mentioned transmission data delay section 13 and reception information generation section] 4 can be realized by a microprocessor storing an appropriate program and its peripheral circuits, or by a combination of these and an appropriate hardware circuit.

Next, the operation of the test apparatus 1 configured as described above will be explained.

FIG. 3 is a timing diagram showing the relationship among transmission information TF, transmission data TD, and reception data RD.

First, the transmission information generation section 21 generates transmission information TF and outputs it to the transmission data delay section 13.

The transmission data delay unit 13 separates the transmission data TD and the transmission delay data TT from the transmission information TF, stores the transmission data TD in the giant transmission interface unit 32, and converts the stored transmission data TD into the transmission delay data TT. The data is transmitted to the modem 15 with a delay of a time TI based on (see FIG. 3).

Modem 15 transmits transmission data TD to facsimile machine 2 via line 3.

The facsimile device 2 creates response data corresponding to the transmission data TD, and transmits this to the test device 1 via the line 3.

This is received by the modem 15 as reception data RD, and the reception data RD is transmitted to the data synthesis section 36 via the reception interface section 34, but the time T6 from the end of transmission of transmission data TD to the start of reception of reception data RD is counted by the reception timer 35, and this time T6 is sent to the data synthesis section 36 as reception delay data RT. The same processing as described above is performed for delay times T2.3 and TT due to other transmission information TF.

The data synthesis unit 36 creates reception information RF from the reception data RD and reception delay data RT, and the reception information analysis unit 22 generates reception information RF.
send to

The received information analysis unit 22 analyzes the received information RF and determines whether the facsimile machine 2 is performing a predetermined normal operation. The content of the analysis includes, for example, determining whether the received data RD with respect to the transmitted data TD is normal or not, and whether the delay times T6 and 7 indicated in the received delay data RT are within a specified range. Or output data, tables, graphs, etc. for such determination.

By variously changing the transmission delay data TT included in the transmission information TF, it is possible to
Alternatively, various delay conditions that are considered to be likely to occur can be set in a pseudo manner, so that a test can be performed that satisfies all delay conditions.

Therefore, it is possible to test delay conditions under special environments that may occur when the facsimile device 2 is actually used for international communications, etc., and to test the operation in advance for such environments. You can check it.

In the above embodiment, the configuration of transmission information TF, transmission delay data TT, reception information RF, reception delay data RT, etc.
The configuration of the test device 1 and its parts can be modified in various ways other than those described above.

〔Effect of the invention〕

According to the present invention, it is possible to perform tests for various delay conditions considered necessary for a data terminal.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of a test device according to the present invention, Fig. 2 is a diagram showing the structure of transmission information and reception information, and Fig. 3 is a timing diagram showing the relationship between transmission information, transmission data destination, and reception data. It is a diagram. 2 stage), 15 is a modem, 21 is a transmission information generation section (transmission information generation means), 22 is a reception information analysis section (reception information analysis means), 35 is a reception timer (reception delay data generation means), TF is transmission information , TD is transmission data, TT is transmission delay data, RD is reception data, and RT is reception delay data. In the figure, 1 is a test device;

Claims (2)

[Claims] (1) A test device for testing the data terminal (2) by transmitting and receiving data to and from the data terminal (2) via the modem (15), including transmission data (TD) and transmission delay data. transmission information generating means (21) that generates transmission information (TF) including transmission data (TT); a transmission data delay means (13) for transmitting data to the data terminal (2); and a timer for measuring the time from the transmission of the transmission data (TD) to the data terminal (2) until the reception of the reception data (RD) from the data terminal (2). a reception delay data generating means (35) for generating reception delay data (RT); and a reception delay data generating means (35) for generating reception delay data (RT). A data terminal testing device characterized by comprising: (2) received information analysis means (22) for analyzing the operating state.