JPH04304068A - Isdn communication equipment - Google Patents

Abstract

PURPOSE:To realize inexpensive communication by specifying the ISDN exchange system in response to the kind of a document to be sent. CONSTITUTION:When an input from a key input section 24 is detected, a CPU 21 analyzes a dial request for dial notice and when the request is the dial notice, a data to be noticed to the destination is generated as a control document and stored in a communication data memory 26. Then packet exchange is commanded to a data communication section 28 to implement dialing. Furthermore, when the request is a dial request for original transmission, it is commanded to a data input section 25 to read a set original and stored in the communication data memory 26. Then line exchange is commanded to the data communication section 28 and dialing is implemented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN communication device connected to an ISDN network and capable of selecting a switching method.

0002

2. Description of the Related Art Conventionally, in communication devices that can use both ISDN packet switching mode and circuit switching mode, system data is changed for each communication to change the switching mode, or a mode registered by the other party is selected. is configured to communicate with

0003

[Problem to be Solved by the Invention] However, in the above conventional example, if the other party's device has both exchange modes, the user can
Having to select one of the exchange modes was troublesome.

[0004] The present invention has been made to solve the above problems, and the IS
It is an object of the present invention to provide an ISDN communication device that can realize inexpensive communication by specifying a DN exchange method.

[0005]

Means and Effects for Solving the Problems In order to achieve the above object, the ISDN communication device of the present invention has the following configuration. That is, the ISDN communication device is connected to an ISDN network and is capable of selecting an exchange method, and includes a generating means for generating at least two types of documents, and an exchange method depending on the type of document generated by the generating means. It has a specifying means for specifying, and a communication means for communicating by the exchange method specified by the specifying means.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram showing an ISDN user communication network in this embodiment. Note that the ISDN user network is, for example, CCITT. It has an interface structure defined by SGXVIII. In Figure 1, 1
2 is a switched network, 2 is a digital subscriber network, 3 and 7 are network terminal devices (hereinafter abbreviated as "NT"), and 4 and 8 are S0 buses to which up to eight terminals can be connected. 5 and 9 are telephones, and 6 is a facsimile device (hereinafter referred to as "") on the data transmission side of this embodiment.
10 and 11 are FAX machines on the receiving side that communicate with the FAX 6. In the ISDN network, a plurality of terminals can be connected to one NT 3, 7, and in this embodiment, a plurality of terminals are connected to the buses 4, 8 as well.

In ISDN communication having the configuration shown in FIG. 1, the switching network 1 has two B channel switching methods: a packet switching method that charges based on the number of transmitted packets, and a circuit switching method that charges based on communication time. Equipped with
For example, in the case of G4 facsimile machines in which FAXes 6, 10, and 11 can send character data and images, inexpensive communication can be realized by communicating character data by packet exchange and images by line exchange.

Next, the detailed configuration of the facsimile apparatus in this embodiment will be explained below with reference to the block diagram shown in FIG.

In FIG. 2, 21 is a CPU that controls the entire FAX according to a program stored in a ROM 22; 22 is a ROM in which programs and the like are stored;
23 is a RAM for temporarily storing data used by the CPU 21; 24 is a key input section; 25 is a data input section for reading image data on the document surface and converting it into a digital signal;
6 is a communication data memory for storing transmitted data or received data; 27 is a data output unit that permanently displays data; 28 is a data communication unit that performs data communication with other communication devices via a line; It's a bus.

[0011] In G4 facsimile, a method of notifying character data such as a dial number to the other party using a control document is generally used. Therefore, in this embodiment, when there is a transmission request from the user, the CPU 21 sends the data communication unit 28 to the data communication unit 28 if the document stored in the communication data memory 26 is a control document such as a character code.
Instructs packet exchange to. In addition, the image data memory 2
If the document No. 6 is image data read from the data input section 25, a call request for circuit switching is made to the data communication section 28.

Next, the control procedure of the FAX 6, which is the data transmitting station in this embodiment, will be explained below with reference to the flowchart shown in FIG.

First, when a key input from the key input section 24 is detected, the CPU 21 advances the process to step S1 and analyzes whether the input is a key indicating a call request for dial notification. As a result, if it is not for dial notification, step S2
The process proceeds to , and it is analyzed whether it is a key indicating a call request for document transmission. As a result, if it is not for document transmission, the process returns to step S1, but if it is for document transmission, the process advances to step S3, where the data input section 25 is instructed to read the set document. Next, when the data input unit 25 finishes reading the original, the process advances to step S4, and the image data converted into digital signals is stored in the communication data memory 26. Then, the process proceeds to step S5,
The data communication unit 28 is instructed to perform line switching, and the process proceeds to step 9, call origination processing.

On the other hand, in step S1, if it is for dial notification, the process advances to step S6, and the key input section 2
Continuing from 4, the dial key is input to create data to be notified to the other party in the RAM 23 as a control document. Then, in step S7, the control document created in the RAM 23 is transferred to the communication data memory 2.
Store in 6. Next, in step S8, the data communication unit 28 is instructed to exchange packets, and in step S9,
A call request is made to the data communication section 28. and,
In step S10, communication is performed according to the facsimile transmission procedure, and then, when the communication is finished, step S10 is performed.
The process advances to step 11 and instructs the data communication unit 28 to disconnect the line.

Next, the details of the data communication section 28 mentioned above are shown in FIG. In FIG. 4, 41 is a communication control unit that exchanges data with the CPU 21 and controls data on the D channel (Dch) and the B channel (Bch);
42 is a D channel control unit that performs call origination/reception and disconnection procedures using the ISDN D channel; 43 is a B channel control unit that exchanges data with a partner terminal on the B channel after a call is made by the D channel control unit 42; and,
44 is a line control unit that sends data to or receives data from the D and B channels of the S0 bus.

In the above configuration, the CPU 21 is configured as shown in FIG.
When memory storage is completed in steps S4 and S7 shown in
In steps S5 and S8, each exchange mode is notified to the communication control unit 41. The communication control section 41 then instructs the D channel control section 42 about the exchange mode as a calling parameter. As an actual command on the line, the exchange mode is specified in the SETUP command of the D channel layer 3.

FIG. 5 is a diagram showing a command sequence in the D channel layer 3 when making a call. Figure 5
51 is a SETUP command, which is used by the terminal to request the network to set up a call. 52 is CALLPRO
The C command is used to notify the terminal of the completion of call setup from the network. Reference numeral 53 is a CONN command, which notifies the calling side of the call reception status of the called side. 54 is CON
The NACK command is used to notify the called terminal of the provision of a call.

Therefore, in this embodiment, as mentioned above,
In steps S5 and S8 shown in FIG. 3, when each exchange mode in the ISDN B channel is specified, the D channel control unit 42 reflects the exchange mode in the transfer capability parameter in the SETUP command 51 and sends it on the line. This changes the exchange mode.

The present invention may be applied to a system made up of a plurality of devices, or to a device made up of one device. It goes without saying that the present invention can also be applied to cases where the present invention is achieved by supplying a program to a system or device.

[0020]

[Effects of the Invention] As explained above, according to the present invention,
By specifying the ISDN exchange method depending on the type of document to be transmitted, it is possible to realize inexpensive communication.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an ISDN user communication network in this embodiment.

FIG. 2 is a block diagram showing the detailed configuration of the facsimile machine shown in FIG. 1;

FIG. 3 is a flowchart showing a control procedure when making a call in this embodiment.

FIG. 4 is a block diagram showing details of a data communication unit in this embodiment.

FIG. 5 is a diagram showing a D channel command sequence when making a call.

Claims (1)

[Claims] 1. An ISDN communication device connected to an ISDN network and capable of selecting an exchange method, comprising: a generating means for generating at least two types of documents; An ISDN communication device characterized by having a specifying means for specifying an exchange method, and a communication means for performing communication according to the exchange method specified by the specifying means.