JPH04256267A - Extension calling system - Google Patents

Abstract

PURPOSE:To continuously call an extension and to simplify redialing operation by having only to dial an end number of other extension whose end number only differs from the extension number of a called party not replying an incoming call and allowing a caller not to hook on when the called party does not reply the incoming call in the case of extension mutual call. CONSTITUTION:A central controller 101 receives and analyzes an end number of other called party (109) whose end number only differs from the extension number of a called party (108) dialed by a caller (107) not hooking off from the extension mutual call state. The central controller gives up a call of the called party (108) and applies call control to the called party 109 whose end number only differs from that of the other called party.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension calling system for a private electronic exchange.

0002

[Prior Art] Conventionally, in this type of extension calling system, if the called party does not answer, the calling party goes on-hook once, abandons the call, and then goes off-hook again and calls another third party. I was calling the extension number.

0003

[Problems to be Solved by the Invention] In the conventional extension calling system described above, when the called party does not answer, the caller goes on-hook once,
Since the system is such that the call is abandoned midway, the call is off-hook again, and another third party's extension is called, so even when calling a third party's extension that only has a different number at the end of the call,
There is a drawback that the call operation is troublesome because the user must go on-hook, abandon the call, and then go off-hook again and dial the third party's extension number from the beginning to the end.

[0004] An object of the present invention is to provide an extension calling system that allows the called party to call an extension continuously by simply dialing the last number without going on-hook to another extension with a different last number when there is no answer. There is a particular thing.

[0005]

[Means for Solving the Problems] The extension calling system of the present invention provides for the extension number of the called party to be dialed by the calling party from the mutual extension calling state in a private electronic exchange equipped with a mutual extension calling function. means for receiving the end number of a third party's extension number having a different number; and means for analyzing the received end number, abandoning the call to the called party, and calling the third party's extension corresponding to the end number. The system is characterized in that when the called party does not answer, the calling party can continuously call another third party having a different ending number by simply dialing the ending number without the caller going on-hook.

[0006]

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

FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, a private electronic exchange 10 includes a time division switch 100, line circuits 103 to 105 accommodating extension telephones 107 to 109 connected thereto that differ only in the end numbers, a register circuit 106, and a register circuit 106, which are connected to a time division switch 100 and which accommodate extension telephones 107 to 109 that differ only in the end numbers. It is controlled by a central controller 101 based on the contents of a main storage device 102 that stores programs, station data, etc.

First, when the extension telephone 107 goes off-hook, the central control unit 101 detects this through the line circuit 103 and sends a dial tone to the extension telephone 107. At the same time, the time division switch 100 is controlled to connect the line circuit 103 and the register circuit 106 in order to receive numbers.

[0009]Subsequently, extension telephone 107 becomes extension telephone 1.
When dialing the extension number of the extension telephone 108 to call 08, the central control unit 101 calls the register circuit 10.
6 to receive dialed digits.

The central control unit 101 stores information about the extension telephone 108 corresponding to the received number in the main memory 1.
02 and sends a ringing signal to the extension telephone 108 via the line circuit 104 to call the extension telephone 108. At the same time, the extension telephone 10 is connected via the line circuit 103.
Send a ringtone to 7. At this time, the register circuit 106
remains connected without restoring it.

[0011] If the extension telephone 108 does not answer, the extension telephone 107 then continues calling the extension telephone 108 in order to continuously call the extension telephone 109, which differs from the extension telephone 108 only in the end of the extension number. Dial the last number of the extension number of extension telephone 109.

The central control unit 101 includes a register circuit 10
6 is received, and together with the extension number of the extension telephone 108 dialed last time, the information of the extension telephone 109 which is the next called party is read from the main memory 102.

[0013] The central control device 101 has a line circuit 104.
The transmission of ringing to the extension telephone 108 is stopped via the
05 to the extension telephone 109,
Call extension telephone 109. Furthermore, the ring tone to the extension telephone 107 is continuously sent, and the register circuit 106 is kept connected until the extension telephone 109 answers or the extension telephone 107 goes on-hook and abandons the call. .

If the extension telephone 109 is also unresponsive and it is desired to continuously call another extension telephone (not shown) or the extension telephone 108 again, the operation will be the same as that described above, so the explanation will be omitted.

Furthermore, when the last number is dialed, if the extension telephone corresponding to the last number is busy, the currently calling extension telephone will continue to ring. At that time, a busy tone is sent to the extension telephone that dialed the last number for a predetermined period of time, informing that the extension telephone corresponding to the last number is busy.

[0016]

Effects of the Invention As explained above, in mutual extension calling, when the called party does not answer, the present invention allows a caller to call a third party whose extension number is different from the called party who does not answer, without going on-hook. Since extensions can be called consecutively, the calling operation is simplified.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram showing one embodiment of the present invention.

[Explanation of symbols]

10　　　　Electronic switchboard for premises 100 Time division switch 101 Central control unit 102 Main memory 103-105 Line circuit 106 Register circuit 107-109 Extension telephone

Claims (1)

[Claims] Claim 1: In a private electronic branch exchange equipped with a mutual extension calling function, a number at the end of an extension number of a third party whose end number is different from the extension number of the called party, which is dialed by a calling party in a mutual extension calling state. means for receiving the call, and analyzing the received last number and abandoning the call of the called party,
and a means for calling the extension of the third party corresponding to the last number, so that when the called party does not answer, the caller can simply dial the last number without on-hooking another third party having a different last number. An extension calling method characterized by consecutive calls.