JPH1117836A - Isdn communication terminal adapter and isdn communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ISDN communication terminal adapter that can set a high layer consistency(HLC) and a low layer consistency(LLC) with a simple operation. SOLUTION: A telephone set 1 generates a push button(PB) signal with a dial button operation at the time of originating a call and set values (numbers) for an HLC and LLC as the PB signal, following the originating call, are generated. An ISDN communication terminal adapter 2 analyzes the PB signal at a control part 5 by way of a PB signal interface 4, and when the set values of the HLC and LLC are added to the telephone number, it is isolated at an HLC/LLC set part 6, the control part 5 refers to HLC information and LLC information stored in a memory 8 and establishes the HLC and LLC, inserts these established HLC and LLC information in a set up message of D-channel and transmits to an ISDN network 10 from an ISDN interface 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ISDN communication, and more particularly to low-layer consistency (hereinafter referred to as LLC) representing information transfer capability of voice, unrestricted digital information, 3.1 kHz audio or the like, a computer, a telephone, FA
X, such as X, indicates the type of communication terminal.
The present invention relates to an ISDN communication terminal adapter and an ISDN communication method for performing communication by setting HLC).

[0002]

2. Description of the Related Art An ISDN communication terminal adapter is an ISDN communication terminal adapter.
In order to execute communication, it is connected between an ISDN line and a communication terminal such as a computer, a telephone, or a facsimile. Generally, an ISDN communication terminal adapter uses a plurality of types of communication terminals, such as a computer, a telephone, and a facsimile, and various information transfer capabilities to perform ISDN communication (for example, communication using INS64 or INS1500 of NTT (Nippon Telegraph and Telephone Corporation). ) Is possible. However, in order for the ISDN communication terminal adapter to execute communication by limiting the type of the communication terminal of the other party and the information transfer capability, the control circuit for controlling the communication of the ISDN communication terminal adapter transmits LLC and HLC before communication. Settings must be registered.

Conventionally, setting registration of LLC and HLC includes A, which is generally developed by Hayes of the United States.
The T command is used. The AT command is a command used when performing various settings for ISDN communication from a computer to a communication terminal adapter. When setting and registering LLC and HLC, ISDN
For the communication terminal adapter, the LLC indicating the information transfer capability of the partner and the HLC indicating the type of the communication terminal of the partner are represented by A.
Set and registered by T command. In this case, AT
In the command, only one type of HLC indicating the type of the communication terminal and LLC indicating the information transfer capability can be set. Therefore, when another LLC and HLC are to be set, for example, when a terminal that can communicate is switched from a telephone to a facsimile, it is necessary to set and register the AT command again from the computer.

As another method of registering HLC settings for an ISDN line, there is a setting method described in Japanese Patent Laid-Open No. Hei 4-27695.

[0005] As shown in FIG.
Is connected to the ISDN network 31 via the terminal attribute negotiation device 36, and the HLC is set by the terminal attribute negotiation device 36. The terminal attribute negotiation device 36 includes an operation unit 34 for inputting a terminal attribute code for setting an HLC, a display unit 35 for displaying an operation result, and a storage unit for storing a terminal attribute corresponding to the input terminal attribute code. 33 and the control unit 32
And When the terminal attribute code is input by the operation unit 34, the control unit 32 stores the terminal attribute corresponding to the terminal attribute code in the storage unit 33 for each terminal sub-address in the HLC.
Is stored as setting information.

At the time of transmission, when the control unit 32 receives a call setting message from the terminal 37 on the D channel, the terminal attribute corresponding to the subaddress of the terminal 37 is read from the storage unit 33, and the read terminal attribute is set as HLC setting information. It is included in the call setup message and transmitted to the ISDN network 31.

When a call setup message is received from the ISDN network 31 at the time of an incoming call, the control unit 32 detects HLC setup information corresponding to the subaddress information included in the message and stores the HLC setup information in the storage unit 33 in advance. It compares with the attribute information, and when they match, sends the received call setup message to the corresponding terminal 37.

As described above, the HLC setting information is registered in the storage unit 33 by inputting the HLC setting code from the operation unit 34 of the terminal attribute negotiation device 36, and is transmitted when the terminal 37 transmits or receives the terminal. At the time of reception at 37, call setting is performed by recognizing the call setting message and the terminal subaddress via the terminal attribute negotiation device 36.

[0009]

Among the prior arts described above, in the case of a method for setting an LLC representing an information transfer capability and an HLC representing a type of a communication terminal by an AT command from a computer to an ISDN communication terminal adapter, Every time the type of communication terminal or the information transfer capability changes, the computer sends an H to the ISDN communication terminal adapter.
It takes time and effort to register and set the LC. In addition, the control circuit of the ISDN communication terminal adapter uses AT.
Requires an application program to send and receive commands. For this reason, the ISDN communication terminal adapter becomes expensive.

In the case of the setting method described in Japanese Patent Application Laid-Open No. 4-276955, an operation unit is required for setting the HLC setting information in the terminal attribute negotiation device and storing it in the storage unit. Further, the terminal attribute negotiation device determines the HLC from the sub-address information included in the D channel call setup message from the terminal, so that the terminal needs an ISDN interface to generate the call setup message. That is, the terminal must be an ISDN-compatible communication terminal, and cannot use a data terminal such as a normal telephone, a facsimile, or a computer. If ISD
In the case of using a terminal that does not support N, an ISDN communication protocol that executes an ISDN communication protocol between the terminal and the terminal attribute negotiation device is used.
An SDN communication adapter must be connected.

An object of the present invention is to eliminate the trouble of setting and registering the LLC and HLC every time the type of communication terminal or the information transfer capability changes, and to provide an ISDN communication adapter or an ISDN communication adapter which does not require a special application program for the setting registration. An object of the present invention is to provide an ISDN communication method.

Another object of the present invention is to provide an ISDN communication terminal adapter or an ISDN communication method capable of setting LLC and HLC by connecting a normal communication terminal having no ISDN communication interface to the terminal. is there.

[0013]

An ISDN communication terminal adapter according to the present invention mainly includes a terminal interface (3 in FIG. 1 and 13 in FIG. 3) connected to a terminal and a terminal interface mainly for calling from the terminal. The input operation unit of the terminal includes a set value of a higher layer consistency (hereinafter, referred to as HLC) representing a type of a calling terminal or a set value of a lower layer consistency (hereinafter, referred to as LLC) mainly representing an information transfer capability. Detecting means for detecting call operation information (4, 5, and 51 in FIG. 1, FIG.
13, 53), and based on the HLC setting value or LLC setting value included in the detected calling operation information,
HLC / LLC setting means for determining the information or LLC information (6, 8 and 52 in FIG. 1, 15, 8 and 5 in FIG. 3)
2) and an ISDN interface (7 in FIG. 1 and FIG. 3) for carrying out call setup by placing the determined HLC information or LLC information in a setup message and performing ISDN communication with the ISDN network.

According to the ISDN communication terminal adapter of the present invention, an HLC setting value or an LLC setting value to be notified to the other party when a call is made from a terminal is generated by a calling operation of an input operation unit of the terminal.
HLC information or L is automatically added to the setup message.
Add LC information. Therefore, not only the type of the communication device and the information transfer capability can be easily set in accordance with the calling operation of the input operation unit of the terminal, but also another operation for setting the HLC information and the LLC information in the setup message. Section or H by application software
There is no need to input commands for setting the LC and LLC.

Specifically, the detecting means detects whether or not the set value of HLC or LLC is added to the calling number for calling the other party as calling operation information at the time of calling, and is added. In this case, the HLC / LLC setting means is
The HLC information or LLC information is determined based on the added HLC setting value or LLC setting value, and if not added, the detecting means outputs the calling number to the ISDN interface.

As described above, since it is detected that the set value of HLC or LLC is added to the calling number, the ISD
The N communication terminal adapter can determine the HLC information or the LLC information according to the operation of the calling number on the terminal side.

The HLC / LLC setting means is, specifically,
A memory for storing all the HLC information and all the LLC information corresponding to the set values of the HLC and the LLC, and determining the HLC information or the LLC information by referring to the memory based on the set values of the HLC or the LLC And a means for outputting the determined contents to the ISDN interface. In this configuration, an IC memory card can be used as the memory in addition to the writable RAM. As a result, even when the contents of HLC and LLC are increased, it is possible to easily cope with the case.

The detecting means includes a push button (P) as calling operation information when calling by telephone or facsimile communication.
B) Detect the signal. Further, the detecting means may detect serial or parallel data as calling operation information at the time of calling by data communication.

Further, the ISDN communication method according to the present invention comprises:
An ISDN communication method for performing communication from a terminal over an ISDN network, wherein, when a call is made from a terminal, an HLC setting value mainly indicating a type of the terminal or an LL mainly indicating an information transfer capability.
Detects call operation information by the input operation unit of the terminal including the set value of C, and determines HLC information or LLC information based on the set value of HLC or the set value of LLC included in the detected call operation information. Then, the determined HLC information or LLC information is carried in a setup message to set up a call and perform ISDN communication with the ISDN network. Thereby, the above-mentioned object can be achieved.

[0020]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of the ISDN communication terminal adapter of the present invention. In FIG. 1, an ISDN communication terminal adapter 2 is connected between a telephone 1, which is a terminal, and an ISDN network 10. The ISDN communication terminal adapter 2 includes an interface 3 connected to the telephone 1 for separating a PB signal and a voice signal, and an HLC and a voice mainly representing a type of a communication terminal on the calling side such as a computer, a telephone, a FAX, A PB signal interface 4 for detecting a PB (push button) signal including an unlimited digital information, an LLC set value mainly representing the information transfer capability of the calling side such as 3.1 kHz audio,
HLC and LL depending on the set values of HLC and LLC
HLC / LLC setting unit 6 for determining C information, ISDN
An ISDN interface 7 for performing ISDN communication on the B and D channels of the network 10, a control unit 5 for controlling the whole, and a memory 8 for storing all HLC information and LLC information corresponding to the set values of HLC and LLC And Here, the HLC information is defined as I
Code data and LLC information representing HLC (communication terminal type) defined in SDN communication are code data representing LLC (information transfer capability) defined in advance in ISDN communication. Here, as the ISDN communication, it is assumed that communication by INS64 of NTT (Nippon Telegraph and Telephone Corporation) is executed.

In the first embodiment of the present invention, when calling, the telephone 1 generates a PB signal by operating a dial button. In the PB signal, in addition to the calling telephone number,
Set values (numbers) of LC and LLC are included. ISD
N communication terminal adapter 2 analyzes the PB signal,
When the set values of C and LLC are added to the telephone number, they are separated and the HLC and LLC are stored in the HL by referring to the HLC information and LLC information stored in the memory 8.
The determined HLC and LLC information is determined in the C / LLC setting unit 6, inserted into the D-channel setup message, and transmitted from the ISDN interface 7 to the ISDN network 10. The control unit 5 analyzes the PB signal and refers to the HLC information and the LLC information stored in the memory 8.
The PB signal analysis unit 51 and the reference unit 52 of FIG.

When the call setup by the setup message is completed, the telephone 1, interface 3 and ISD
Communication by voice via the N interface 7 is performed via the B channel bus 9. The B channel bus 9 is connected to the B channel of the ISDN interface 7 and is transmitted to the ISDN network 10 by the B channel.

Next, the detailed operation of FIG. 1 will be described with reference to the flowchart shown in FIG. In FIGS. 1 and 2, when setting HLC and LLC for the other party, when the telephone 1 makes a call, after the calling telephone number,
A predetermined button such as “#” or “*” is pressed, and subsequently the set values of HLC and LLC are pressed from the dial buttons. The set values of HLC and LLC are one-digit or plural-digit number information or combination information such as number information and character information (which can be set by dial buttons) determined in advance according to the type of communication terminal and information transfer capability. It is represented by here,
Since the setting is for telephone communication using the telephone 1, the HL
A set value indicating a telephone is input as a set value of C, and a set value indicating voice is input as a set value of LLC after "#" or "*" by a dial button.

The PB signal is sent to the P
B signal interface 4 (step S in FIG. 2).
0), the PB signal analyzer 51 of the controller 5 is notified. P
The B signal analyzing unit 51 analyzes the notified PB signal,
It is determined whether there are LC and LLC set values. This determination is made based on whether or not there is information (identification information) by operating a specific button of the telephone 1 such as “#” or “*”.

If the PB signal analyzer 51 determines that the set values of HLC and LLC are present (YES in step S2),
The PB signal analysis unit 51 outputs a first instruction signal to the PB signal interface 4 (step S3), and the PB signal interface 4 transmits the first instruction signal to the HLC and the LC according to the first instruction signal.
HB / LLC setting unit 6
(Step S4). HLC / LLC setting unit 6
Separates the PB signal into the calling telephone number and the set values of HLC and LLC (step S5).

The set values of the separated HLC and LLC are sent to the reference unit 52 of the control unit 5, and the reference unit 52 refers to the HLC information and the LLC information stored in the memory 8 based on the set values ( Step S6), corresponding HLC information and LLC
The information is determined (step S7). The determined HLC information and LLC information are sent again from the reference unit 52 to the HLC / LLC.
It is sent to the setting unit 6. As a result, the HLC / LLC setting unit 6 stores the HLC information and the LLC information in addition to the calling telephone number.
The data is incorporated into a data format determined by NS64 and transmitted to the D channel of the ISDN interface 7 (step S8). ISDN interface 7
Incorporates the data format into the setup message and transmits it to the ISDN network 10 via the D channel. When the HLC and the LLC are confirmed by the setup message on the other side of the ISDN network 10 and the call setting procedure is completed, a voice call is executed by the B channel (B1 or B2 channel) via the B channel bus 9 (step). S9). In this case, the interface 3 outputs the audio signal to the B channel bus 9 as a digital serial signal. Therefore, the interface 3 has a function of converting an audio signal from analog to digital.

In step S2 of FIG. 2, HLC and L
When the PB signal analyzer 51 determines that there is no LC set value (NO in step S2), the PB signal analyzer 51
The second instruction signal is output to the B signal interface unit 4 (step S10), and the PB signal interface 4 outputs the PB signal (calling telephone number) to H in response to the second instruction signal.
Transfer to the ISDN interface unit 7 (step S1)
1).

Thereafter, the ISDN interface 7 incorporates the calling telephone number into the setup message,
It is transmitted to the ISDN network 10 via the D channel. When the call setting is completed, a voice call is executed by the B channel (B1 or B2 channel) via the B channel bus 9 (step S9).

As described above, the ISDN communication terminal adapter of FIG. 1 adds the HLC setting value and the LLC setting value relating to the calling terminal (telephone 1) to the calling telephone number at the time of calling the telephone 1, Since HLC information and LLC information can be automatically included in the setup message of the D channel, HLC and LLC are specified and selective ISD is performed.
N communication can be easily performed. Therefore, HLC
There is no need to provide a separate operation unit for setting information and LLC information in the setup message or to input a setting command using application software.

In FIG. 1, a telephone with a facsimile function (or a facsimile with a telephone function) may be connected to the interface 3 instead of the telephone 1. In this case, the telephone with the facsimile function is
When making a call with the other party's telephone on the DN network, it is only necessary to input the setting values of the HLC or LLC for the telephone at the time of making a call with a dial button. When communicating with the other party's facsimile as a facsimile, H
What is necessary is just to input the setting value of LC or LLC with a dial button at the time of a call. Therefore, according to the ISDN communication terminal adapter of FIG. 1, the type of the communication device and the information transfer capability in the ISDN communication can be easily set by a dial operation.

FIG. 3 is a block diagram showing a second embodiment of the ISDN communication terminal adapter of the present invention. In the ISDN communication terminal adapter 12 of the second embodiment, an information communication terminal 11 such as a computer or a G4 facsimile apparatus is connected instead of the telephone 1 of FIG.

The ISDN communication terminal adapter 12 is connected to the information communication terminal 11 and has information transfer capabilities such as HLC indicating the type of the communication terminal (computer or other data communication terminal, model of computer, etc.) and data communication speed. A serial data interface 13 for detecting serial data including a set value of the LLC to be represented, an HLC / LLC setting unit 15 for determining HLC and LLC based on the serial data for setting the D channel setup message, and an ISDN interface 7. , And a memory 8 for storing HLC information and LLC information corresponding to set values of HLC and LLC. The same components as those in FIG. 1 are denoted by the same reference numerals as those in FIG.

In the second embodiment, serial data is used in place of the PB signal.
This is almost the same as FIG. 2 except that the signal is replaced with serial data. That is, when making a call,
The keyboard of the information communication terminal is operated in place of the dial button of the telephone, and when a call is made, a predetermined key such as "#" or "*" is operated after the key input of the calling telephone number, and thereafter, Subsequently, the set values of the HLC and the LLC relating to the information communication terminal 11 are input by a key. Thereby, the serial data by the key input is transmitted to the serial data interface 13.

The serial data from the key input is received by the serial data interface unit 13 and the control unit 50
Is notified to the serial data analysis unit 53 of FIG. The serial data analysis unit 53 analyzes the notified serial data and determines whether there are HLC and LLC set values. This determination is made based on whether or not there is information (referred to as identification information) by key operation of “#” or “*”.

When the serial data analyzer 53 determines that the set values of the HLC and the LLC are present, the serial data analyzer 53 sends the first data to the serial data interface 13.
The serial data interface 4 transfers serial data with HLC and LLC setting values to the HLC / LLC setting unit 15 in response to the first instruction signal. The HLC / LLC setting unit 15 separates the serial data into a calling telephone number and HLC and LLC setting values.

The set values of the separated HLC and LLC are sent to the reference unit 52 of the control unit 50. The reference unit 52 refers to the HLC information and LLC information stored in the memory 8 based on the set values, Determine the corresponding HLC and LLC information. The determined HLC information and LLC information are referred to the reference unit 52.
Is sent to the HLC / LLC setting unit 15 again. As a result, the HLC / LLC setting unit 15 incorporates the HLC information and the LLC information in addition to the calling telephone number into a data format predetermined by the INS 64, and transmits the data format to the D channel of the ISDN interface 7. The ISDN interface 7 incorporates the data format into the setup message and transmits it to the ISDN network 10 via the D channel. HLC by setup message
When the call setting procedure is completed, the data communication is executed by the B channel (B1 or B2 channel) via the B channel data bus 91.

If the serial data analyzer 53 determines that there are no HLC and LLC set values, the serial data analyzer 53
The serial data interface 13 outputs serial data (calling telephone number) by key input to the D-channel bus 92 according to the second instruction signal.
To the ISDN interface unit 7 via

Thereafter, the ISDN interface 7 incorporates the calling telephone number into the setup message,
It is transmitted to the ISDN network 10 via the D channel. When the call setting is completed, the data communication is performed on the B channel data bus 9.
1 through the B channel (B1 or B2 channel).

As described above, the ISDN communication terminal adapter 12 shown in FIG. 3 adds the HLC setting value and the LLC setting value to the calling telephone number by key input at the time of calling by the information communication terminal 11, thereby providing the D channel. Since the HLC information and the LLC information can be automatically included in the setup message, the HLC and the LLC can be specified and the selective ISDN communication can be easily performed.

Referring to FIG. 3, the information communication terminal 11
Was called using the calling telephone number, but any number may be used as long as it calls the terminal of the other party.

FIG. 4 is a block diagram showing a third embodiment of the ISDN communication terminal adapter of the present invention. The ISDN communication terminal adapter 120 of this embodiment is the same as the IDN communication terminal adapter 120 shown in FIG.
It has both functions of the SDN communication terminal adapter 2 and the ISDN communication terminal adapter 12 of FIG. Telephone 1
For voice terminals such as and facsimile, interface 3
The information communication terminal 11 such as a computer is connected to the serial data interface 13. However, only one of the telephone 1 and the information communication terminal 11 is ISD
It is assumed that communication with the N network 10 is possible. The configuration and operation of the blocks denoted by the same reference numerals as in FIGS. 1 and 3 are the same as those in the first and second embodiments.

The control section 500 has both functions of the control section 5 of FIG. 1 and the control section 50 of FIG. The control unit 500
Makes the telephone caller of the telephone 1 and the information communication terminal 11 the communication state first, and in that case, the other party cannot be called by the restriction signal P. This call restriction is performed by the interface 3 and the serial data interface 13 by the restriction signal P.

The PB signal / serial data analysis unit 53 of the control unit 500 analyzes the PB signal from the PB signal interface 4 or the serial data from the serial data interface 13 and outputs “#” or “*” following the calling number. Then, it detects whether a predetermined button or key such as a key is pressed, and detects whether there is a set value of HLC or LLC by detecting a code. The above-described first and second instruction signals based on the determination are sent to the PB signal interface 4 or the serial data interface 13, respectively.

As a result of the analysis by the PB signal / serial data analyzer 53, if the set values of HLC and LLC are not in the PB signal or serial data (when the second instruction signal is generated), the PB signal interface 4 The serial data interface 13 outputs the calling number to the ISDN interface 7 via the D channel bus 93.
When a call is established and a telephone call or data communication by telephone 1 or information communication terminal 11 is executed, interface 3
Signal or serial data interface 1 from
3 is transmitted from the ISDN interface 7 via the B channel 90 to the other party via the B channel.

The reference section 52 has the functions of both of the reference sections 52 of FIGS. 1 and 3, and the operation of each is the same as that of each of the reference sections. HLC / LLC setting unit 6,
15 is provided separately for the PB signal interface 4 and the serial data interface 13, but if the signal form from each interface 4 and 13 is the same, only one HLC / LLC setting unit is required.

According to the embodiment of FIG. 4, there is an effect that a plurality of types of communication terminals can be connected to set HLC and LLC.

The ISDN communication terminal adapter of the present invention is not limited to the embodiment described above. For example, ISD
The form of N communication is not limited to INS64 of NTT, but INS
1500 or other ISDN communication may be used.

In FIGS. 1, 3 and 4, a plurality of interfaces 3 and serial data interfaces 13 may be connected. As a result, a plurality of terminals can be connected to the ISDN communication terminal adapter at the same time. Alternatively, a parallel interface may be connected instead of the serial interface, and parallel data may be input from a terminal. In this case, between the parallel interface and the ISDN interface,
A serial conversion circuit is required.

Further, in FIGS. 1, 3 and 4, as the memory 8, an IC memory card can be used in addition to the writable RAM. Thereby, HLC and L
Even when the content of the LC is increased, it can be easily handled.

Also, at the time of calling, the set values of HLC and LLC are added after the calling telephone number following the identification information.
A telephone number may be added following the identification information after the set values of HLC and LLC. Further, only one of the HLC and the LLC may be set. Further, identification information for separating setting values of HLC and LLC may be added.

[0052]

As described above, the ISDN of the present invention is
The communication terminal adapter and the ISDN communication method are such that when a call is made from a terminal, the HLC information and the LLC setting value of the terminal are set by the calling operation of the input operation unit of the terminal, so that the HLC information is automatically added to the setup message. LLC information can be carried. Therefore, not only the HLC and the LLC can be specified by the calling operation to selectively realize the ISDN communication, but also the HLC information and the LLC
There is no need to provide another operation unit for setting the LC information in the setup message or to input a setting command using application software.

Also, at the time of calling, the terminal only sets HLC and LLC by calling operation with the input operation unit.
The terminal may be a conventional communication terminal, and does not require a special function for ISDN communication or an ISDN interface on the terminal side.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of an ISDN communication terminal adapter of the present invention.

FIG. 2 is a flowchart showing an operation of the ISDN communication terminal adapter shown in FIG.

FIG. 3 is a block diagram showing a second embodiment of the ISDN communication terminal adapter of the present invention.

FIG. 4 is a block diagram showing a third embodiment of the ISDN communication terminal adapter of the present invention.

FIG. 5 is a block diagram showing a conventional ISDN communication terminal adapter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone 2 ISDN communication terminal adapter 3 Interface 4 PB signal interface 5 Control part 6 HLC / LLC setting part 7 ISDN interface 8 Memory 9 Voice path 10 ISDN network

Claims (8)

[Claims] 1. An I / O connected between a terminal and an ISDN network.
An SDN communication terminal adapter, comprising: a terminal interface connected to the terminal; and a higher layer consistency (hereinafter HL) mainly representing the type of the terminal from the terminal interface when a call is made from the terminal.
C), or detection means for detecting call operation information by the input operation unit of the terminal including a set value of a lower layer consistency (hereinafter, referred to as an LLC) mainly representing an information transfer capability. HLC / LLC setting means for determining HLC information or LLC information based on the set value of the HLC or the set value of the LLC included in the call operation information, and a setup message for the determined HLC information or the LLC information. An ISDN communication terminal adapter including an ISDN interface for setting up a call and carrying out ISDN communication with an ISDN network. 2. The detecting means detects whether or not a setting number of the HLC or LLC is added to the calling operation information at the time of calling, to determine whether or not a calling number for calling the other party is added. The HLC / LLC setting means, based on the added setting value of the HLC or the setting value of the LLC, sets the HLC information or the LLC based on the setting value of the LLC.
2. The ISDN according to claim 1, wherein when the LC information is determined, and the LC information is not added, the detecting means outputs the calling number to the ISDN interface.
Communication terminal adapter. 3. The HLC / LLC setting means, wherein:
A memory for storing all the HLC information and all the LLC information corresponding to the set value of the LC and the set value of the LLC, and referring to the memory based on the set value of the HLC or the set value of the LLC; 3. The ISD according to claim 1, further comprising: a reference unit for determining the HLC information or the LLC information; and a unit for outputting the determined content to the ISDN interface.
N communication terminal adapter. 4. The ISDN communication terminal adapter according to claim 1, wherein said detecting means detects a push button (PB) signal as said calling operation information when calling by telephone or facsimile communication. 5. The ISDN communication terminal adapter according to claim 1, wherein said detection means detects serial or parallel data as said call operation information when calling by data communication. 6. The detection means includes a push button (PB) signal as the call operation information when calling by telephone or facsimile communication, and serial or parallel data as the call operation information when calling by data communication. The ISDN communication terminal adapter according to claim 1, wherein the detection is performed. 7. An I / O for communicating from a terminal through an ISDN network.
In the SDN communication method, when a call is made from the terminal, a higher layer consistency (hereinafter referred to as HLC) mainly indicating the type of the terminal.
), Or call operation information by the input operation unit of the terminal including a set value of a lower layer consistency (hereinafter, referred to as LLC) mainly representing information transfer capability, and the detected call is detected. HLC information or LL based on the set value of the HLC or the set value of the LLC included in the operation information
C information is determined, and the determined HLC information or the L
An ISDN communication method characterized by carrying out call setup by carrying LC information in a setup message and performing ISDN communication with an ISDN network. 8. When detecting the call operation information, a push button (PB) signal is used as the call operation information when calling by telephone or facsimile communication, and as the call operation information when calling by data communication. 8. The ISDN communication method according to claim 7, wherein serial or parallel data is detected.