JPH06276251A - Picture communication terminal equipment - Google Patents

Abstract

PURPOSE:To provide a picture communication terminal equipment in which whether or not the calling is operated by the same caller can be discriminated at the time of repeatedly operating a calling and incoming sequence in order to establish a calling with respect to plural lines. CONSTITUTION:The picture communication terminal equipment equipped with a function which multiplex-transmits each digital signal of a video, voice, and data, is equipped with a line information setting means 14 which sets line information constituted of the number of lines and a line number to be used for a calling setting message for establishing communication to be operated by bundling the plural lines, line information storage means 15 which stores the line information set at the received calling setting message, and incoming call discriminating means 16 which discriminates whether or not a line connection request is issued from the same caller based on the stored line information. Even when an incoming call from the other caller is present during the connection of the plural lines, the incoming call discriminating means 16 identifies that the calling is not operated by the same caller, and refuses the incoming call.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication terminal device for transmitting image data and the like through an ISDN line, and more particularly, to a structure for ensuring a line as planned when a plurality of lines are bundled for communication. It was done.

[0002]

2. Description of the Related Art An image communication terminal device has a function of multiplexing and transmitting digital signals of video, audio and data.

As shown in FIG. 4, a conventional image communication terminal device is connected to a camera 1, a microphone 2 and a speaker 3 to compress / encode video data or audio data at the time of transmission and decompress / decode at the time of reception. A codec section 7, a telewriting control section 8 for converting data from the tablet 4, a display control section 9 for controlling display switching of images on the monitor 5, and a terminal device based on settings from the key input section 6. A terminal control unit 10 that controls the whole, a multiplexing / separating unit 11 that multiplexes video, audio, and telewriting data at the time of transmission and separates at the time of reception, and a call control processing unit that manages calls such as incoming and outgoing calls and disconnection. 12 and a line interface unit 13 for connecting a terminal to the ISDN line.

In this image communication terminal device, the sending terminal A
When the user inputs a line number and selects a function from the key input unit 6 to make a call, the information is notified to the call control processing unit 12 via the terminal control unit 10, and the call received is received. The control processing unit 12 sets up a call according to the sequence shown in FIG.

The call control processing unit 12 first creates a call setup message, and the ISDN via the line interface unit 13.
Send to. In the receiving terminal B which has received this call setting message, the call control processing unit 12 analyzes the content of the message and then transmits a response message in response to the call setting message. In the calling terminal A which has received the response message, the call control processing unit 12 analyzes the response message and then transmits the response confirmation message. The call is established when the receiving terminal B receives the response confirmation message, and thereafter the communication becomes possible, and video, voice, telewriting
Data is exchanged.

When communication is performed by bundling a plurality of lines, a call origination / termination sequence according to the above procedure is sequentially repeated for a plurality of channels to establish a call.

[0007]

However, in the conventional image communication terminal device, in order to perform communication by bundling a plurality of lines, the calling terminal A and the called terminal B sequentially send out a plurality of channels. When a call is established by repeating the incoming sequence, another terminal C receives an incoming call from the incoming terminal B during the call.
When an incoming call is received, the receiving terminal B cannot distinguish whether the calling terminal is the same party or not, and therefore cannot reject the incoming call and set up a call with the calling terminal C. Resulting in. As a result, a situation occurs in which the user of the originating terminal A cannot secure a plurality of channels intended by the user.

The present invention solves these problems in the prior art, and in order to establish a call for a plurality of lines,
It is an object of the present invention to provide an image communication terminal device capable of discriminating whether or not those calls are made by the same terminal when the calling and receiving sequences are repeated.

[0009]

Therefore, in the present invention, in an image communication terminal device having a function of multiplex-transmitting digital signals of video, audio and data, a communication for bundling a plurality of lines is established. Line information setting means for setting the line information consisting of the number of lines and the line number to be used in the call setting message, and the line information storing means for storing the line information set in the received call setting message, An incoming call determining unit that determines whether or not the line connection request is from the same party based on the line information.

[0010]

Therefore, in order to perform communication by bundling a plurality of lines, even if there is an incoming call from another party while the plurality of lines are being connected, the incoming call determination means identifies that they are not the same party. The incoming call can be rejected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an image communication terminal device according to an embodiment of the present invention sets call information on the number of used lines and the line number to be used when communication is performed by bundling a plurality of lines. The line information transmission unit 14 set in the message, the line information storage unit 15 that stores the number of used lines and the line number information sent from the other side when receiving a call, and the information stored in the line information storage unit 15 An incoming call determination unit 16 that determines the identity of the called party based on the. Other configurations are the same as those of the conventional device (FIG. 4).

When a plurality of lines are bundled for communication, the line information transmitting unit 14 includes, in the call setting message for the first transmission, the line used for this communication as shown in FIG. Set the number and its line number.

On the other hand, the line information accumulating unit 15 on the receiving side stores the line information set in the call setting message, and the incoming call judging unit 16 stores the line information in the call setting message when there is a subsequent line incoming. The included information and the stored line information are compared to determine whether or not the same party is a call establishment request.

The operation when performing communication in which three lines are bundled using this image communication terminal device will be described.

From the key input unit 6 of the transmitting terminal A, the user
When the key input of the line numbers of the three lines to be used and the key input for selecting the communication function in which a plurality of lines are bundled is performed and then the key operation for starting the transmission is performed, the information is obtained.
It is notified to the call control processing unit 12 via.

The call control processing unit 12 receiving the instruction instructs the line information transmitting unit 14 to set the number of used lines and the line number, and the line information transmitting unit 14 uses the number of used lines of 3 and The line number and the line number are set as shown in FIG. Here, the number of used lines is represented by an 8-bit binary number, the line number is represented by a 4-bit binary number, and "1111" is inserted at the line number delimiter.

This set line information is used by the call control processing unit.
12 stores it in the user-user information element in the call setup message and sends it out through the line interface 13 to the ISDN network.

On the other hand, when receiving the call setup message from the network, the receiving terminal B analyzes the line information in the user-user information element by the call control processing unit 12 and then when communication using a plurality of lines is possible. Stores the information in the line information storage unit 15, and according to the sequence shown in FIG.
Send a response message to the network.

After that, when the response confirmation message is transmitted and received and the connection of the first line between the calling terminal A and the receiving terminal B is completed, the calling terminal A sets the second line in the calling number area in the call setting message. Set the line number and call the second line.

Then, the receiving terminal B, which has received the call again, compares the calling number in the received call setting message with the line number stored in the line information accumulating unit 15 in the incoming call determining unit 16, and when they match, Sends a response message from the call control processing unit 12 to the network, and completes the connection of the second line with the calling terminal A through the sequence of FIG.

Further, the number of calling terminals A and B is 3
The same operation is performed to connect the third line, and when the connection of the third line is completed, communication using the three lines bundled between terminals A and B is performed.

Further, in the receiving terminal B, the incoming call judging section 16 receives the calling number and the line information accumulating section 15 in the received call setting message.
If it is determined that they do not match, the call control processor 12 sends a release completion message to reject the incoming call. Therefore, the receiving terminal B, as shown in FIG.
When there is an incoming call from the incoming call, the calling number in the incoming call setting message and the line number stored in the line information accumulating unit 15 do not match, so the incoming call is rejected.

[0023]

As is apparent from the above description of the embodiments, in the image communication terminal device of the present invention, when a plurality of lines are bundled for communication, an incoming call is received from another party during the connection of the plurality of lines. If there is, it can be rejected, so that it is possible to secure communication with a plurality of lines as intended by the user.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an image communication terminal device of the present invention,

FIG. 2 is a coding example of a call setup message used to convey line information in the device of the embodiment;

FIG. 3 is a call origination / termination sequence diagram in the image communication terminal device according to the embodiment;

FIG. 4 is a block diagram showing a configuration of a conventional image communication terminal device,

FIG. 5 is a call origination / termination sequence diagram in a conventional image communication terminal device.

[Explanation of symbols]

 1 camera 2 microphone 3 speaker 4 tablet 5 monitor 6 key input unit 7 codec unit 8 telewriting control unit 9 display control unit 10 terminal control unit 11 multiplex / separation unit 12 call control processing unit 13 line interface unit 14 line information transmission unit 15 Line information storage unit 16 Incoming call determination unit

Claims (1)

[Claims] 1. A line to be used in a call setting message for establishing communication by bundling a plurality of lines in an image communication terminal device having a function of multiplex-transmitting digital signals of video, voice and data. The line information setting means for setting the line information consisting of the number and the line number, the line information storing means for storing the line information set in the received call setting message, and the same partner based on the stored line information. An image communication terminal device, which is provided with an incoming call determining means for determining whether or not the line connection request is from the line connection request.