JPH05122279A - Data size recognition notice system for isdn terminal equipment - Google Patents

Abstract

PURPOSE:To confirm whether or not a quantity of data to be sent prior to data transfer is surely received to an opposite party. CONSTITUTION:In the case of data transmission reception, a data size management section 1 of a central control section 13 of an ISDN terminal equipment uses a delimiter to separate 1st data size information representing data quantity able to be stored in its own terminal equipment and 2nd data size information representing data quantity to be transferred to an opposite terminal equipment thereby managing them. A user user signal conversion section 2 of a sender side converts the 2nd data size information into a user user signal. A user user signal transmission section 3 sends the converted signal to an opposite terminal equipment according to a user signal procedure. A user user signal reception section 4 of the receiver side receives the user user signal. A user user signal analysis section 5 compares and collates the data size represented by the received signal and the 1st data size information managed by the data size management section 1 to discriminate whether or not the data size is a receptible data size and informs the result to the sender side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN terminal device, and more particularly to a data size recognition and notification system for an ISDN terminal device that recognizes a data storage size of a communication destination and notifies the communication destination of a data transfer size.

[0002]

2. Description of the Related Art Conventionally, in the ISDN terminal device, in the data transfer phase of the B channel, the data storage size of the communication destination is recognized and the data transfer size is notified to the communication destination.

[0003]

As described above, in the conventional ISDN terminal device, the data storage size of the communication destination is recognized and the data transfer size is notified to the communication destination in the data transfer phase of the B channel. If it is not in the transfer phase state, it cannot be judged to the communication destination whether or not the data size is transferable.
There is a problem in that it is necessary to disconnect and reset the data size so that it can be transferred, resulting in extra operations and communication charges.

[0004]

According to the data size recognition and notification method of an ISDN terminal device of the present invention, when data is transmitted and received between ISDN terminal devices, each ISDN terminal device on the transmitting side and the receiving side receives its own terminal device. The first data size information indicating the amount of data that can be stored in the second terminal and the second data size information indicating the amount of data to be transferred to the partner terminal device are separated and managed by a discriminator. The data size information is converted into a user-user signal, and the converted signal is transmitted to the partner terminal device via the ISDN network in accordance with the user-user signal procedure, and at the receiving side, the user from the partner side through the ISDN network. A data size that can be received by receiving a user signal, comparing and collating the data size value indicated by the received signal with the first data size information managed It determines whether it is configured to notify the transmitting side.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an ISDN terminal device for explaining an embodiment of the present invention. In this figure, the ISDN terminal device on the other side is not shown. I of the present invention
The SDN terminal device has a keyboard 11 and a display 1.
2, an I / O interface unit 10 for controlling data 2, a flexible disk 14 for storing data, and an ISDN
A protocol processing unit 16 that controls layers 1 and 2 of the user / network interface, and controls reading / writing of data from / to the flexible disk 14 to generate a message of call control information of layer 3 of the ISDN user / network interface to generate the user. A central control unit that sends a user signal to the protocol processing unit 16 according to a user signal procedure that does not correspond to a circuit-switched call via the D channel and controls the selection switch circuit 15 to select one of the two B channels. And a central control unit 1
A data size management unit 3 manages the first data size information indicating the amount of data that can be stored in the automatic terminal device and the second data size information indicating the amount of data to be transferred to the partner terminal device by separating them with a discriminator. 1 and 2, a user / user signal converter 2 for converting the second data size information into a user / user signal, and a user / user signal transmitter for sending the converted signal to a partner terminal device according to a user / user signal procedure. 3, a user / user signal receiving unit 4 for receiving a user / user signal from the terminal device of the other party, a data size value indicated by the received signal, and first data size information managed by the data size management unit 1. And a user / user signal analysis unit 5 which compares and collates and notifies the other party.

The operation will be described below. First, on the transmitting side, when a file name on the flexible disk 14 is input from the keyboard 11, the central control unit 13 converts the above-mentioned second data size information managed by the data size management unit 1 into a user-user signal. After the conversion by the unit 2, the user / user signal transmitting unit 3 transmits the signal to the other terminal device according to the user / user signal procedure that does not correspond to the circuit switched call.

Next, on the receiving side, the user / user signal receiving unit 4 receives the signal indicating the second data size information transmitted from the terminal device on the other side via the ISDN network.
Then, the user / user signal analysis unit 5 compares and collates the data size value indicated by the received signal with the first data size information managed by the data size management unit 1, and determines whether or not the data size is receivable. Is determined and the sender is notified. When the data can be stored in the terminal device, the central control unit 13 makes a normal call connection and transfers the data on the flexible disk 14 through the B channel.

[0009]

As described above, according to the present invention, prior to data transfer, the data transfer size information for the other terminal device is first communicated between the terminal devices according to the user / user signal procedure that does not correspond to the circuit switched call. Since it is configured to make a comparison judgment with the data storable size information in the own terminal device at this time and notify the other party of the result, there is an effect that data can be surely transferred.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an ISDN terminal device for explaining an embodiment of the present invention.

[Explanation of Codes] 1 data size management unit 2 user / user signal conversion unit 3 user / user signal transmission unit 4 user / user signal reception unit 5 user / user signal analysis unit 10 input / output interface 11 keyboard 12 display 13 central control unit 14 flexible disk 15 selection switch circuit 16 protocol processing unit

Claims (1)

[Claims] 1. When data is transmitted and received between ISDN terminal devices, first data size information indicating the amount of data that can be stored in the own terminal device of each ISDN terminal device on the transmitting side and the other terminal device. The second data size information indicating the amount of data to be transferred to
On the transmitting side, the second data size information is converted into a user-user signal, and this converted signal is converted into a user-user signal.
According to the user signal procedure, the data is sent to the partner terminal device via the ISDN network, and the receiving side receives the user / user signal from the partner side via the ISDN network, and manages the data size value indicated by the received signal. ISD characterized by comparing and collating with the above-mentioned first data size information, determining whether or not the data size is receivable, and notifying the transmitting side
N terminal device data size recognition notification method.