JPH05347647A - Communication equipment - Google Patents

Abstract

PURPOSE:To recognize countries through a signal bus by writing standards of line exchanges of each country to a ROM of an IC card section with a modem function or the like mounted thereon through the firmware to standardize the IC card section CONSTITUTION:The IC card section is provided with a DSP 12 realizing an intelligent function and data error control or the like, and a ROM 13 or the like into which standards of line exchanges of each country are written through the firmware. The IC card section and a box having a DAA function circuit display section compatible with communication standards of each country are connected by a signal bus 19 with a connector and a DAAIF bus 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device used for mutual communication between computers and various functional terminal devices.

[0002]

2. Description of the Related Art When a computer is used for communication, a modem device is provided between the computer and an analog line. FIG. 2 is a schematic configuration diagram thereof. In FIG.
21 is a data terminal device (hereinafter D
It is called TE), and this DTE21 is RS-232C22.
Is used to connect to the modem device 23. Modem device 23
Is connected to the analog line 24. The modem device 23
Since it is an external device of the DTE 21, the modem device 23 has recently been replaced by the DTE 2 because of the need for installation space.
The means for storing in 1 is adopted. This type is called a board type as shown in FIGS. 3, 4 and 5, and can be roughly divided into the following three types.

FIG. 3 shows a printed circuit board 2 in the DTE21 main body.
A modem circuit function unit 21b is mounted on 1a. In FIG. 4, a dedicated board 21c equipped with a modem circuit function section 21b is provided, and the dedicated board 21c and the printed board 21a are connected by a board passing connector 21d. In FIG. 5, a slot 21e is provided in the DTE 21, a board connector 21f is arranged inside the slot 21e, and a modem-specific printed board 21h having an edge connector terminal 21g is inserted from the slot 21e.

Each of the above-mentioned FIGS. 3 to 5 has its own characteristics, and is appropriately selected. The type shown in FIG. 3 is the smallest possible, but it has the drawback that compatibility cannot be obtained because the modem section must be designed at the same time as the DTE body. Although the miniaturization of FIG. 5 is inferior to that of FIG. 3, it can be standardized and can be commonly applied to various DTEs because the modem board is designed independently. 4 is shown in FIG.
And the one in FIG. In the case of a communication device having an ISDN interface function, the modem 23 is called and the digital line 24 (INS64, I
The same applies if it is called NS1500).

[0005]

FIG. 6 is an explanatory diagram for describing a technique for realizing a modem function. In FIG.
Reference numeral 1 is a DTE main unit, and this DTE main unit 61 is a DS that realizes a bus interface circuit, a basic circuit of a modem such as modulation, demodulation, and dialing, intelligent functions such as command analysis, data error control, and compression function.
A glue logic circuit for connecting P (digital signal processor) and its peripheral circuits (ROM and RAM) and the above circuits. This DTE body 61 has a DTE2
There is provided a connector (IC card connector) 62 for connecting with 1. Reference numeral 63 is a data access arrangement (DAA) function circuit, and this circuit 63 is provided with a modular connector 64 for connecting to a telephone line, for example. Reference numeral 65 is a coupling circuit that connects the interface unit 61 and the DAA function circuit 63.

Each circuit of the DTE body 61 is an LSI.
(Highly integrated circuit element), transistor, diode, resistor, capacitor, etc.
It is realized by SMD (surface mount component) of m or less. Also,
The DAA function circuit 63 is a lead component of 5 mm or more such as the connector 64, a line transformer, a surge absorber, and a bifilar choke. The reason for using such a component is that it must be directly connected to a telephone line and have a predetermined surge withstand voltage and characteristics, so that a pin distance and a structural dimension for realizing it are necessary.

A modem device constructed by the above technique is
FIG. 7 shows a C card type. In FIG. 7, 71
Is an IC card portion corresponding to the DTE main body portion 61 shown in FIG. 6, and a first connector portion 72 (corresponding to the connector 62 in FIG. 6) is provided at the left end portion of the IC card portion 71 in the drawing.
The second connector portion 73 is provided at the right end of the IC card portion 71 in the figure.
To provide. Reference numeral 74 denotes a box portion in which circuits corresponding to the DAA function circuit 63 and the modular connector 64 shown in FIG. A shielded cable 75 is provided. The second cable is attached to one end of the shielded cable 75.
A third connector portion 76 fitted into the connector portion 73 is provided, and the other end is directly connected to a DAA functional circuit board (not shown) in the box portion 74 or detachable by a connector. The box portion 74 is provided with a line connecting portion 77 corresponding to a modular connector.

The IC card portion 71 having the above-mentioned structure
There is the following problem when using the while connecting to a foreign device. First, the line connection 77 (modular jack connector) has the same shape in Japan, the United States, and Canada, but Germany has a different dimensional structure, and other countries such as the United Kingdom also have different shapes. In addition, communication standards such as insulation resistance standard, insulation distance standard, withstand voltage standard, CI (calling indication calling) detection system, polarity detection system, overload withstand voltage, busy tone detection, ringing tone detection, etc. are different in each country, Since all of these belong to the DAA function circuit, a communication device in which the box portion 74 is formed for each country and is combined with the IC card portion 71 is conceivable.

However, in the IC card section 71, the D shown in FIG.
There is a problem that it is not easy to make the functions of the TE body 61 the same because the standards of the circuit switching equipment differ from country to country as follows. These standards are: (a) pulse dial make / break ratio, (b) pause time, (c) dial transmission timing, (d) whether or not line status is automatically checked, (e) transmission level, (f) reception Sensitivity, (g) CI
Signal processing, (h) recalling condition, number of times, (i) busy tone detection, etc.

The present invention has been made in view of the above circumstances, and a communication device in which the specifications of the circuit switch for each country are converted into firmware and written in the ROM to standardize the IC card section so as to be compatible with each country is provided. The purpose is to provide.

[0011]

In order to achieve the above object, the first invention is a modem function, DSP, RO.
An IC card unit in which M, RAM, etc. are mounted, a box unit having a DAA function circuit in which a line connection unit is mounted, and a first connector connected to a data terminal device provided at one end of the IC card unit Part, a second connector part formed at the other end of the IC card part, and a third connector part connected to the second connector part.
In a communication device including a functional circuit and a connected body, the specifications of the circuit switching equipment which are different for each country are comprehensively written in the ROM mounted on the IC card unit as firmware. Is.

The second invention provides country-specific information for recognizing each country.
It is characterized in that it is formed by information on the electrical short circuit of the connector or the combined body.

A third invention is a DS provided in an IC card section.
It is characterized in that the information for each country is selectively extracted from the firmware of the ROM by P to instruct the communication conforming to the communication standard of each country.

[0014]

[Function] By writing the specifications of the circuit switch for each country in the ROM, it becomes possible to standardize the IC card section. Further, it is possible to obtain the communication standard information for each country by the third connector portion and the combined body, and use the DSP to instruct the communication suitable for each country.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 11 is an IF bus connected to the DTE 21 shown in FIG. 2, and this IF bus 11 is connected to a DSP 12 that realizes intelligent functions such as command analysis, data error control, and compression functions. 13 is the standard of the circuit switch for each country firmware (F / W)
It is a ROM that has been written after being converted to
Various other operating programs of SP12 are also written.

Reference numeral 14 is a RAM, 15 is a glue logic circuit, and 16 is an analog front end.
It is connected to the DSP bus 17 together with the SP 12 and the ROM 13. The analog front end 16 is connected to the DAA function circuit 63 housed in the box portion 74 shown in FIG. 7 and the DAAIF bus 18. Reference numeral 19 is a signal bus for obtaining country-specific information. The signal bus 19 and the DAAIF bus 18 correspond to the shielded cable 75 shown in FIG.

The DAAIF bus 18 has two secondary side signal lines of the line passing through the line transformer, two CI (calling indication) detection signals, and 10 other lines.
It is about a book. Therefore, if, for example, 6 are prepared as the country-specific information signal bus 19, one of them is used as a common line, and the other 5 are short-circuited and displayed in binary, it is possible to identify 32 countries. As a result, the DSP 12 can properly select the F / W for each country written in the ROM 13 by the country-specific information signal bus 19 and perform communication that conforms to the standards of each country.

DSP 12, ROM constructed as described above
13 and the like are mounted on the IC card unit 71 shown in FIG.
The card unit 71 is connected to the box unit 74 shown in FIG. 7 by the DAAIF bus 18 and the signal bus 19.

In order to use the communication device configured as described above in a certain country, if the country information is given to the signal bus 19, the standard of the circuit switch is written in the ROM 13, so that it conforms to the communication standard of that country. You can achieve the desired movement.

[0020]

As described above, according to the present invention,
Since the firmware in which all the firmware for each country is described is comprehensively written in the ROM of the IC board portion, it is possible to standardize the IC board portion. Further, it is possible to conform to the communication standards of a plurality of countries by the short-circuit information of the connector or the combination. Further, by standardizing the IC substrate portion, there are advantages that the manufacturing cost can be reduced and the quality can be improved.

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a connection between a data terminal device and a modem.

FIG. 3 is an explanatory diagram showing an example of mounting a board type modem function.

FIG. 4 is an explanatory diagram showing another example of FIG.

FIG. 5 is an explanatory diagram of a modem board with an edge connector.

FIG. 6 is an explanatory diagram showing means for realizing a modem function.

FIG. 7 is an explanatory diagram showing a configuration of an IC card separation type modem device.

[Explanation of symbols]

 11 ... IF bus 12 ... DSP 13 ... ROM 14 ... RAM 15 ... Glue logic circuit 16 ... Analog front end 17 ... DSP bus 18 ... DAA IF bus 19 ... Signal bus 71 ... IC board section 72 ... First connector section 73 ... Second Connector part 74 ... Box part 75 ... Shielded cable 76 ... Third connector part 77 ... Line connection part

Claims (3)

[Claims] 1. An IC card unit equipped with a modem function, a DSP, a ROM, a RAM, etc., and a D equipped with a line connection unit.
A box portion having an AA functional circuit, a first connector portion connected to a data terminal device provided at one end of the IC card portion, and a second connector formed at the other end of the IC card portion. And a third connector part connected to the second connector part, and a combined body connected to the DAA function circuit of the box part, the communication device being mounted on the IC card part. A communication device characterized in that the specifications of circuit exchanges that differ from country to country are converted into firmware and written comprehensively in ROM. 2. The communication device according to claim 1, wherein the country-specific information for recognizing each country is formed by electrical short-circuit information of the third connector or the combined body. 3. The DSP provided in the IC card unit selectively extracts country-specific information from the firmware of the ROM to instruct communication conforming to the communication standard of each country. The communication device according to 1 or 2.