JPH0334667A - Call-back number informing system - Google Patents

Abstract

PURPOSE:To efficiently execute a speech by informing plural usable number information given to a calling party side terminal to a called party side terminal, when the calling party side terminal contained in an electronic exchange calls the called party side terminal. CONSTITUTION:A calling party side registers in advance plural telephone numbers in a storage device of an electronic private branch exchange 1 as an outgoing sub- address of a calling party side terminal 3, and sends out a call set message containing an incoming number, an outgoing number and an outgoing sub-address at the time of calling a called party side terminal 4 of a subscriber's number. The outgoing sub- address is telephone number by which the calling party side terminal can receive a call-back, and in the case the called party side terminal 4 is busy or executes no answer, the outgoing number and the outgoing sub-address information are stored in the called party side terminal 4. In this state, when the calling party side terminal 3 is called back from the called party side terminal 4 afterward, the outgoing number and the outgoing sub-address information are read out of a storage circuit of the called party side terminal 4 and displayed, and a call set message is sent out as an incoming number and an incoming sub-address. In such a way, it becomes unnecessary to make a call again, and the speech can be executed efficiently.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a callback number notification system.

[Conventional technology]

Conventionally, as a method of notifying call-back numbers, CCITT
According to the Recommendation ■ series, when the calling party and the called party make a call to the called party by using a device that has storage means for storing phone numbers, etc., on both the calling party and the called party, if the called party is busy,
Even in the case of no response, the called party can retrieve the information sent from the calling party from the storage means and know what phone number the caller came from. The information is dialed and the calling terminal is called back.

[Problem to be solved by the invention]

In the conventional method of notifying the call-back number described above, when the called terminal calls back the calling terminal, if the telephone number that the calling terminal previously called is busy, it will not be possible to call again. There are problems that need to be fixed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a callback number notification system that allows a call to be received at another available telephone number even if the telephone number to which the caller terminal originally called is busy.

[Means to solve the problem]

In the call-back number notification system of the present invention, when a calling terminal housed in an electronic exchange calls a called terminal, information on a plurality of usable numbers assigned to the calling terminal is transmitted to the called terminal. It is configured to notify the side terminal.

〔Example〕

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

FIG. 1 is a configuration diagram for explaining one embodiment of the present invention.

In the call-back number notification method shown in FIG.
It is accommodated in private branch exchange 1 of 11J, and has subscriber number "2".
It is connected to the called terminal 4 of 221000J by an I5DN network via one of the connection points specified in CCITT Recommendation Nijiries, 775 points.

FIG. 2 is a configuration diagram showing a call setup message when calling a called terminal according to an embodiment of the present invention, and FIG. 3 is a configuration diagram showing a call setup message when calling back a calling terminal according to an embodiment of the present invention. FIG.

On the calling side, a plurality of telephone numbers 1, for example r3000゜3001.
4QQQJ to the storage device of private electronic branch exchange 1 (not shown)
When the called terminal 4 of the subscriber number r222-1000J is called, the called number 9 sends a call setting message containing the calling number and the calling subaddress as shown in FIG. The calling subaddress is the telephone number at which the calling terminal can receive a call back, and is r3QQO, 3001, 40.
00" are divided using a special number 1, for example "#J.If the called terminal 4 is busy or does not respond, the calling number and calling subaddress information are stored in the called terminal 4. I'll let you.

Later, when the called terminal 4 calls back the calling terminal 3, the above-mentioned calling number and calling subaddress information are read out from the memory circuit of the called terminal 4 and displayed, and the called number is displayed as shown in FIG. and sends a call setup message as the destination subaddress. Private branch exchange 1 that received this call setup message
The call is terminated on a line with an empty telephone number from among the plurality of telephone numbers in the called subaddress information.

In this embodiment, an example is shown in which the calling terminal is housed in a private electronic branch exchange, but a similar configuration can be applied to a public electronic exchange.

〔Effect of the invention〕

As explained above, when a calling terminal housed in an electronic exchange calls a called terminal, information on a plurality of usable numbers assigned to the calling terminal is sent to the called terminal. Since the configuration is configured to notify the terminal, when the called terminal calls back the calling terminal later, even if the telephone number that the calling terminal previously called is busy or unanswered, etc. , the call can be received at another available telephone number, eliminating the need to call again, which has the effect of increasing call efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining an embodiment of the present invention, FIG. 2 is a block diagram showing a call setup message when calling a called terminal according to an embodiment of the present invention, and FIG. 3 is a block diagram of the present invention. FIG. 3 is a configuration diagram showing a call setting message when calling back a calling terminal according to an embodiment of the invention. ■・・・・・・Private branch exchange, 2・・・・・・l5D
N network, 3... Calling side terminal, 4... Called side terminal.

Claims (1)

[Claims] When a calling terminal housed in an electronic exchange calls a called terminal, information on a plurality of usable numbers assigned to the calling terminal is notified to the called terminal. Call-back number notification method.