JP3274965B2 - Video conference system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video conference system in which efficient call processing is performed when a large number of terminal devices are connected via ISDN to a central terminal device having a limited number of lines.

[0002]

2. Description of the Related Art In a conventional video conference system in which data is transferred to and from a partner terminal via an ISDN line, when the partner terminal is busy and a call cannot be made, the telephone number of the partner is used by using a redial function. Is repeatedly dialed at regular time intervals, and waits for the line of the partner terminal to become available.

[0003]

In a system using such a redialing function, when the destination terminal is fixed by only one terminal, the line of the destination terminal becomes free using such a function. I had no choice but to wait. However, when trying to make a call in a multipoint format with a plurality of partners, when the lines of the plurality of partner terminals become busy, the redialing function cannot cope with the busy condition and the line efficiency is not good.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these problems. In a video conference system in which voice and image data are transferred via an ISDN conversion network, the present invention relates to a DSN of an ISDN conversion network. The terminal is provided with a memory for recording a caller number notified from the terminal to the terminal by using the channel, and the I number is set while the B channel is busy.
Adding the number of incoming calls of the calling party number recorded in the memory with all records the calling party number received from SDN conversion network, the pre-Symbol memory by utilizing the time that B channel is not being used A video conference system is provided which rearranges and displays the caller numbers recorded in the order of the number of incoming calls and calls back the telephone number in the order of the number of incoming calls.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a video conference system having an incoming call recording and call back function according to the present invention. FIG. 2 shows a configuration of a caller ID record table registered in a memory provided in the video conference system of the present invention. FIG. 3 is a diagram illustrating an operation when an incoming call is received during communication in the video conference system of the present invention, and FIG. 4 is a list display when communication is not performed in the video conference system of the present invention. FIG. 5 is a diagram illustrating an operation when a request of the user is obtained from the user, and FIG. 5 is a diagram illustrating an example of a list display. In FIG. 1, reference numeral 1 denotes a calling side TV conference system terminal, 2 denotes an ISDN switching network, 3 denotes a receiving side TV conference system terminal, and a receiving side TV conference system terminal 3
Has a memory 4, and this memory 4 stores a caller number record table 5 shown in FIG. In FIG. 2, the caller number record table 5 includes a recording unit 22 in which an incoming call record is stored and a management unit 21 that manages data in the recording unit 22. This recording unit 22
, The caller number received by the D channel is sequentially recorded in the recording unit 22, and the number of incoming calls corresponding to this telephone number is recorded in the management unit 21. FIG. 3 is a flowchart for recording an incoming call in the receiving side TV conference system terminal 3 when there is an incoming call during communication. The caller number is extracted (S10), and it is checked whether or not this telephone number matches the telephone number already recorded in the recording unit 22 of the caller number record table 5 (S11).
If the number has already been recorded (S12), the number of incoming calls recorded in the management unit 21 corresponding to the number is taken out (S13), and 1 is added to this number (S14). If the caller number is not registered, this number is additionally registered as a new number at the end of the recording section 22 of the caller number record table 5 (S15). FIG. 4 is a flowchart in the case where the list display request is obtained from the user when the B channel is not busy, that is, when communication is not being performed. The caller numbers are rearranged in the order of the number of times (S21). Then, a list is displayed based on the rearranged information (S22), and if the calling terminal is selected, a call is made to this terminal (S23). An example of the list display rearranged in this way is shown in FIG.

[0006]

As is apparent from the above description, according to the present invention, the terminal which has received a call while the central unit is busy, and the operator can list the number of incoming calls when the central unit is released from busy. By displaying the information, the priority of the terminal to be called can be easily recognized.

[Brief description of the drawings]

FIG. 1 is a block diagram of a video conference system having an incoming call recording and call back function according to the present invention.

FIG. 2 is a diagram illustrating a configuration of a caller number record table registered in a memory provided in the video conference system of the present invention.

FIG. 3 is a diagram illustrating an operation when an incoming call is received during communication in the video conference system of the present invention.

FIG. 4 is a diagram illustrating an operation when a list display request is obtained from a user when communication is not being performed in the video conference system of the present invention.

FIG. 5 is a diagram illustrating an example of a list display.

[Explanation of symbols]

 1 originating TV conference system terminal 2 ISDN switching network 3 destination TV conference system terminal 4 memory 5 caller ID record table

Claims (1)

(57) [Claims] In a video conference system in which voice and image data are transferred via an ISDN conversion network, a caller number notified from a terminal to the terminal using a D channel of the ISDN conversion network is recorded. before with a memory for providing a terminal, B channels to record all the calling party number received from the ISDN converter network during busy
The number of incoming calls for the caller number recorded in the memory
Add and use the time when the B channel is not used
TV conference system which is characterized by performing a pre-Symbol call-back of the number of incoming calls in order of phone number and displays rearranges the recorded caller number in the memory to the number of incoming calls order.