JPH114306A - Communication processing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the service independently of ISDN modernization of a communication destination in the case of using an ISDN board by providing a communication function for a digital signal and a communication function for a voice band signal to the ISDN board and selecting either of the communication functions. SOLUTION: An ISDN board is provided with a data link control function 11 and a speed conversion function 12 as a communication function for a digital signal and with a MODEM function 14 and a voice CODEC 7 as a communication function for a voice band signal. The ISDN board starts a communication with a communication destination by using the digital communication function at first. In the case that a communication destination has a digital communication function, a reply message is returned via an ISDN channel and the communication is started. On the other hand, in the case that the communication destination has no digital communication function, an interrupt message is returned. In this case, a call message denoting a communication capability in terms of a signal of an existing analog network is used and the call is made again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication processing system using an ISDN board, and more particularly to a communication processing system capable of providing a service without depending on ISDN of a communication destination.

[0002]

2. Description of the Related Art It is promising to utilize an existing personal computer as a communication terminal for providing a multimedia communication service utilizing the high-speed communication function and the multi-channel function of ISDN. At this time, ISDN enables the provision of advanced communication services, but on the other hand, the connection procedure is more complicated than the conventional telephone network, so an interface function for realizing connection processing between a personal computer and ISDN is required. It is becoming.

The interface function includes a terminal adapter and an ISDN board. This terminal adapter is prepared as a module corresponding to a modem in a conventional analog line, and is connected to an RS232C port of a personal computer or the like to realize data communication via ISDN.

On the other hand, an ISDN board is mounted in an option slot of a personal computer, and is provided with an ISDN board.
It implements a physical connection function with the ISDN exchange and a connection procedure with the ISDN exchange.

This ISDN board is intended to combine the information processing function of a personal computer with the digital information communication function of ISDN. In general, in addition to the ISDN connection function, the ISDN board has a data communication function such as a data link control function. It has functions at the same time. Further, by controlling the connection procedure from a personal computer, a more advanced telephone service can be realized. In some cases, audio equipment for telephone service such as a handset is provided to provide a voice call service.

[0006]

However, the conventional ISDN board implements only a digital communication function and does not support a data communication function using a voice band signal. For example, in a terminal adapter, RS232C
Standard digital signal (eg, 9600 bps)
Is converted into an ISDN 64 kbps digital signal sequence. This conversion function
For example, V. Standardized by CCITT The conventional ISDN board which realizes the H.110 standard is provided with this speed conversion function.

However, even in this case, the conventional ISDN board does not adopt a configuration for converting into a voice band signal realized by a modem. That is, only the digital data communication function is realized, and the data communication function using the voice band signal is not supported.

[0008] As a result, when the conventional ISDN board is used, there has been a problem that communication with a personal computer communication center or the like connected to an existing analog network cannot be executed.

[0009] The present invention has been made in view of such circumstances, and when an ISDN board is used, an ISDN of a communication destination is used.
It is an object of the present invention to provide a new communication processing method that enables services to be provided without depending on DNization.

[0010]

According to the present invention, there is provided a configuration for executing data communication with a communication destination via an ISDN board mounted on a data processing apparatus.
The N board has a communication function for digital signals (having at least a data link control function and a speed conversion function)
And a communication function for a voice band signal (including at least a modulation / demodulation function and a voice codec).
By interpreting the control channel signal given from the ISDN line, any communication function is configured to be selectable. At the time of transmission, the transmission is performed on the premise of the digital communication function as a first procedure. When the response is received, the communication is performed using the digital communication function. When the disconnection message is received instead of the response, the call is automatically retransmitted on the premise of the voice band data communication function as the second procedure. Process as you go.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail according to embodiments. First, the present invention will be described according to an embodiment having a principle configuration.

FIG. 1 shows a basic configuration of an ISDN board prepared for realizing the present invention. The ISDN board shown in this figure is prepared for realizing the communication processing system of the present invention that enables communication processing with a communication terminal connected to an existing analog network.

In FIG. 1, reference numeral 1 denotes an ISDN connection function corresponding to layer 1 of the OSI model, which constitutes a physical interface for connection to an ISDN line. This I
Upon receiving a digital signal from the ISDN line, the SDN connection function 1 separates the digital signal,
Processing is performed to obtain a control channel signal (D channel signal) for connection with the exchange and a 64 kbps information channel signal (B channel signal) that is a voice signal or data information.

Reference numeral 2 denotes an ISDN connection control function corresponding to layers 2 and 3 of the OSI model.
And extracts and interprets the ISDN connection control message from the control channel signal to be separated. The ISDN connection control function 2 has a DMA request signal generation function of generating a DMA request signal from an 8 KHz clock signal for an audio signal obtained from an ISDN line.

Reference numeral 4 denotes a personal computer interface function for processing an interface with a personal computer to which an ISDN board is connected. This personal computer interface function 4 has a DMA control interface. 5 is a data buffer function,
It buffers data sent to the N line and data sent from the ISDN line.

Reference numeral 6 denotes an audio interface function for processing an interface with a connected telephone audio device. Reference numeral 7 denotes a voice codec which converts an analog signal into a digital signal of a non-linear PCM code.
This reverse conversion process is executed.

Reference numeral 10 denotes a communication destination function specifying function of the ISDN connection control function 2, which specifies a communication function of the communication destination by interpreting a control channel signal given from the ISDN line. A data link control function 11 establishes a data link with a communication destination by executing, for example, an HDLC procedure.

Reference numeral 12 denotes a speed conversion function which converts data information of the communication speed used in the conventional personal computer communication into IS.
The conversion is performed to 64 kbps, which is the communication speed of the DN line, and the inverse conversion is performed. 13 is the first
And bypasses the speed conversion function 12. A modulation / demodulation function 14 converts an analog signal into a digital signal and executes the inverse conversion process.

Reference numeral 15 denotes a second switch for selecting either the acoustic interface function 6 or the modulation / demodulation function 14. A third switch 16 selects one of the audio codec 7, the speed conversion function 12, and the first switch 13.

Using the ISDN board shown in FIG. 1,
In the present invention, according to the instructions of the personal computer,
First, the ISDN board starts communication with the communication destination according to the digital communication function. In this case, ISD
Unlimited digital data of 64 kbps is specified as the communication capability in the outgoing call message in the layer 3 message sent to the N line.

If the communication partner has a digital communication function, a response message is returned via the ISDN line,
Communication starts. On the other hand, if the communication partner does not have a digital communication function, a disconnection message is returned.
In this case, the transmission is immediately performed again using the outgoing call message having the communication capability of the 3.4 KHz signal.

In carrying out such communication processing, according to the present invention, the ISDN board has at least a data link control function 11 and a speed conversion function 12 as communication functions for digital signals and an ISDN board for voice band signals. Since the communication function includes at least the modulation / demodulation function 14 and the audio codec 7, it is possible to execute advanced communication processing not only with the ISDN network but also with communication terminals connected to an existing analog network.

In the above description, the personal computer performs communication function selection processing.
The CPU function of the DN board may perform processing to select a communication function.

As described above, by using the communication processing method of the present invention, it is possible to execute the communication processing with the existing analog network while following the more sophisticated communication processing in the transition stage to the ISDN network. Become.

Next, the present invention will be described with reference to detailed examples. FIG. 2 shows a system configuration of a communication processing system to which the present invention is applied. As shown in this figure,
The ISDN board 20 of the present invention is provided to execute an interface process between the personal computer 70 and the ISDN network 80, and has a configuration in which telephone audio equipment such as the telephone 50 is connected. is there. This ISDN network 80 will coexist with the existing analog network 90 until the full conversion to the ISDN network 80 is realized. Incidentally, reference numeral 60 in the drawing denotes a DSU.

FIG. 3 shows the ISD used to implement the present invention.
One embodiment of the N board 20 is illustrated. In the figure, 21 is CP
U and 22 are ROM, 23 is RAM, 24 is an address decode logic circuit, 25 is an address bus, 26 is a data bus, 27 is a PC bus interface circuit, and 28 is an ISD.
N interface control LSI, 29 a transformer, 30 a buffer block, 31 a code conversion addition ROM, 32 a parallel / serial conversion block, 33 a parallel / serial conversion circuit, 34 a communication control LSI, 35 a V.110
Functional circuit, 36 is a V.22 modem circuit, 37 is a voice codec, 38 is an analog switch, 39 is a switch, 40
Is a matrix switch, 41 is a PC bus connector, 42
Is an 8-pin modular connector, and 43 is a 6-pin modular connector.

This PC bus interface circuit 27
The personal computer interface function 4 described with reference to FIG. 1 is realized. The ISDN interface control LSI 28 implements the functions of the ISDN connection function 1 and the ISDN connection control function 2 described with reference to FIG. The buffer block 30 implements the data buffer function 5 described with reference to FIG.

The code conversion addition ROM 31 converts a linear PCM code voice signal into a nonlinear PCM code voice signal, and converts the converted nonlinear PCM code voice signal and the nonlinear PCM code voice signal output from the voice codec 37. Is performed.

The communication control LSI 34 implements the data link control function 11 described in FIG. The V.110 function circuit 35 corresponds to the speed conversion function 12 described with reference to FIG.
Executes speed conversion processing of 10 methods. V.22 Modem circuit 3
Reference numeral 6 corresponds to the modulation / demodulation function 14 described with reference to FIG. 1, and executes V.22 system modem processing recommended by CCIT.

The audio codec 37 implements the audio codec 7 described with reference to FIG. Matrix switch 40
Executes switch processing for selecting a circuit function used for communication processing. The PC bus connector 41 connects the personal computer 70 shown in FIG. The 8-pin modular connector 42 connects the DSU 60 shown in FIG. The 6-pin modular connector 43 connects the telephone 50 shown in FIG.

FIG. 4 shows a buffer block 30, a code conversion addition ROM 31, and a parallel / serial conversion block 3.
2 illustrates one embodiment. Here, the same components as those described in FIG. 3 are denoted by the same symbols. As shown in FIG. 3, the parallel / serial conversion circuit 33 shown in FIG. 3 is constituted by a shift register, receives serial data from the audio codec 37, and shifts the input data in synchronization with a clock of 64 KHz. As a result, the conversion process to 8-bit parallel data is performed.

As shown in FIG.
0 denotes a 16-bit register 301 for latching linear PCM encoded data from the personal computer 70 input via the internal bus, and data (nonlinear PCM encoded data / linear PCM code) output to the personal computer 70. (Registered data) is latched in synchronization with 8 KHz and output to the personal computer 70 via the data bus 26.

The code conversion addition ROM 31 converts a 16-bit linear PCM coded data input from the register 301 into a non-linear PCM coded data to obtain an 8-bit audio signal.
It is composed of an addition conversion ROM 312 that adds the nonlinear PCM code audio signal input from the audio codec 37 input via the serial conversion circuit 33 and the nonlinear PCM code audio signal output from the code conversion ROM 311 and outputs the result. You.

The parallel / serial conversion block 3
Reference numeral 2 denotes a shift register 321 that loads the non-linear PCM encoded data output from the addition conversion ROM 312 in synchronization with a clock of 8 KHz and outputs the serial data to the matrix switch 40 as serial data synchronized with a clock of 64 KHz. And a shift register 322 that performs a conversion process to 8-bit parallel data by shifting data such as an audio signal input in step S in synchronization with a clock of 64 KHz and outputs the converted data to the register 302. You.

Next, an example of an operation process using the ISDN board having this configuration will be described. First, the data sent from the ISDN line is transmitted to the personal computer 7.
A process for reading data to 0 will be described.

When data (linear PCM encoded data / non-linear PCM encoded data) sent from the ISDN line is read into the personal computer 70, the matrix switch 40 is connected to the ISDN line provided via the ISDN interface control LSI 28. Is input to the shift register 322 of the parallel / serial conversion block 32, and the shift register 322
Is executed by inputting the input data to the register 302 of the buffer block 30.

In this process, if the data sent from the ISDN line is a voice signal of a non-linear PCM code, unlike the data information, it does not have header information, so it is DMA-transferred to the personal computer 70 as it is. The personal computer 70
Can be stored as an arbitrary data size within the limit of the memory capacity.

In this embodiment, a code conversion ROM for converting linear PCM coded data into nonlinear PCM coded data
311 is disclosed, but a code conversion ROM for performing the inverse conversion is prepared, and this code conversion RO
Non-linear PC sent from ISDN line according to M
Convert M encoded data to linear PCM encoded data,
The converted linear PCM encoded data may be configured to be transferred to the personal computer 70.

This eliminates the need for the personal computer 70 to execute the conversion of the encoded code. Next, a process for synthesizing an audio signal stored in the personal computer 70 and an audio signal output from the telephone 50 and outputting the synthesized signal to the ISDN line will be described.

When the audio signal synthesizing process is performed, the register 301 latches the audio signal of the linear PCM code stored in the personal computer 70, and the code conversion ROM 311 converts the audio signal into non-linear PCM encoded data. Since the conversion is performed, the addition conversion ROM 312
Adds the non-linear PCM code audio signal from the audio codec 37 input via the parallel / serial conversion circuit 33 and the non-linear PCM code audio signal output from the code conversion ROM 311.

The shift register 321 converts the added voice signal of the non-linear PCM code into serial data, and the matrix switch 40 outputs the synthesized voice signal of the non-linear PCM code of the serial data to the ISDN interface control LSI 28. It will be executed by doing.

According to the audio signal synthesizing process, the music stored in the personal computer 70 is changed to the back music, and the audio signal output from the telephone
Various service processes can be provided, such as sending to an SDN line.

In this embodiment, the addition conversion ROM 312
However, it discloses that the audio signal of the non-linear PCM code generated by the telephone 50 of the own device is to be added, and the matrix switch 40 outputs the added audio signal to the ISDN line. Addition conversion ROM 31
2, a non-linear PCM code voice signal generated by another device sent from the ISDN line is added, and the matrix switch 40 transmits the added voice signal via the voice codec 37 to its own telephone. It is also possible to adopt a configuration in which the synthesized audio signal is output to the telephone 50 of its own device by being configured to output to the telephone 50 of the own device.

In this embodiment, the addition conversion ROM 3
12 is disclosed as exhibiting an addition function.
Is configured to perform the addition process by setting the non-linear PCM coded data from the audio codec 37 to a zero value in accordance with the instruction from the non-linear PCM coded data obtained by the process of the code conversion ROM 311 as is.
Since the data can be output to the N line, the linear PCM encoded data stored in the personal computer 70 can be converted to the nonlinear PCM encoded data and output to the ISDN line.

As shown in FIG. 3, the ISDN board 20 used for realizing the present invention includes a communication control LSI 34, a V.110 function circuit 35, a V.22 modem circuit 36, and a voice codec 37 which exhibit a data link function. And a switch function for switching these paths.

The present invention employs a configuration for executing communication processing according to the following communication procedure in accordance with these functions. That is, when making a call, the personal computer 70
First, a line connection process is started on the premise of digital communication using a calling message in which unlimited digital data having a communication capability of 64 kbps is specified.

When the response message is returned via the ISDN line and the communication is started, the communication control L
SI34 → switch 39 → V.110 functional circuit 35 → matrix switch 40 → ISDN interface control LSI
According to a circuit route of 28, data transfer with a communication destination is realized according to a communication function of ISDN communication.

On the other hand, if the communication partner does not have a digital communication function, a disconnection message is returned. In this case, the communication message is immediately re-used by using a call message having a communication capability of a 3.4 KHz signal. Make a call.

According to this retransmission process, a response message is returned via the ISDN line, and when communication is started, the communication control LSI 34 → switch 39 → V.22 modem circuit 36 → analog switch 38 → voice codec 3
7 → Parallel / serial conversion circuit 33 → Sign conversion addition R
OM31 (however, the code conversion function and the addition function are not exhibited) → parallel / serial conversion block 32 → matrix switch 40 → ISDN interface control LSI
The communication with the communication destination is started according to the circuit route 28.

That is, data communication with the communication destination is started in accordance with the communication processing for the voice band signal using the V.22 modem circuit 36 and the voice codec 37. By using the communication procedure of the present invention, it is possible to execute communication processing with the existing analog network while following a more sophisticated communication processing in the transition stage to the ISDN network.

[0051]

As described above, according to the present invention,
When an ISDN board is used, a service can be provided without depending on ISDN of a communication destination.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of an ISDN board prepared for realizing the present invention.

FIG. 2 is an explanatory diagram of a communication processing system to which the present invention is applied.

FIG. 3 is an embodiment of an ISDN board prepared for realizing the present invention.

FIG. 4 is an embodiment of an ISDN board prepared for realizing the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ISDN connection function 2 ISDN connection control function 4 Personal computer interface function 5 Data buffer function 6 Sound interface function 10 Communication destination function specification function 11 Data link control function 12 Speed conversion function 13 First switch 14 Modulation / demodulation function 15 Second switch 16 Third switch

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ryuichi Matsukura 4-1-1 Kamikadanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (72) Inventor Hiromi Hasegawa 4-1-1 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture No. 1 Inside Fujitsu Limited (72) Inventor Satoshi Okuyama 4-1-1 Kamikodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited

Claims (2)

[Claims] 1. An ISDN mounted on a data processing device.
In a communication processing method for executing data communication with a communication destination via a board, an ISDN board has a communication function for digital signals and a communication function for voice band signals, and an ISDN board.
By interpreting the control channel signal given from the line, it is configured so that any communication function can be selected. When making a call, as a first procedure, a call is made on the premise of a digital communication function, and a call from a communication partner is made. If there is a response, the communication is performed using the digital communication function. If a disconnection message is received instead of the response, the call is automatically retransmitted assuming the voice band data communication function as a second procedure. A communication processing method characterized by processing. 2. The communication processing method according to claim 1, further comprising at least a data link control function and a speed conversion function as communication functions for digital signals, and at least a modulation / demodulation function as communication functions for voice band signals. And a voice codec.