JPH01255395A - System for calling extension - Google Patents

Abstract

PURPOSE:To attain high efficiency at the time of calling an extension by simultaneously calling other extensions to form a group when a non-answer is detected for definite time at the time of calling a specific extension. CONSTITUTION:By the call of a telephone set 10, a CPU 60 controls a subscriber's circuit 21, a telephone set 11 is called, a ringing tone A is sent from a tone generating circuit 30 to the telephone set 10, and further, a time to be decided beforehand is set from a memory 70 to a reading clock circuit 80. When a time is out, the CPU 60 reads grouping extension number information to the telephone set 11 to be already set from the memory 70, telephone sets 12-14 which correspond are simultaneously called, respectively (the telephone set 11 is continued to be called), and further, a ringing tone B is sent from the tone generating circuit 30 to the telephone set 10. Thus, the other extension operator in the group can execute an answer from the extension on the desk of his own, and a calling side extension operator can sense that the specific extension operator leaves a seat by the fact that the ringing tone is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an extension calling system in a private automatic branch exchange.

[Conventional technology]

In conventional extension calling systems, when a specific extension calls, the call simply continues even if there is no answer, or the person handling the other extension goes to the specific extension and answers.

[Problem to be solved by the invention]

In the conventional extension calling method described above, when a specific extension calls, even if there is no answer, the caller simply continues calling, or the person handling the other extension goes to the specific extension and answers. This has the disadvantage that the extension operator is inconvenienced, and at the same time, the extension operator on the calling side has no way of knowing any information about the specific extension and has to wait impatiently as the non-response time elapses.

An object of the present invention is to provide an extension calling system that solves the above problems.

[Means to solve the problem]

In order to achieve the above object, the extension calling system of the present invention includes means for forming a group with a specific extension and other extensions;
A clock circuit is provided, and when a specific extension is called, if no response is detected for a certain period of time, other extensions in the group are called at the same time.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a relay system diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the main part of FIG. 1.

In FIG. 1, 10, 11, 12, 13.14 are telephones with display units, 20.21, 22, 23.24 are subscriber circuits corresponding to each telephone 10, 11, 1213, 14, and 1 is a 40 is a register trunk, 50 is a control circuit, 60 is a cPU, 70 is a memory, and 80 is a clock circuit.

The extension numbers corresponding to display telephones 11, 12, 13.14 are 4000.4001 and 4005.40, respectively.
07.

When the subscriber circuit 20 detects a call from the telephone 10, the CPU 60 recognizes it via the control circuit 50 and connects the register trunk 40. When the telephone 10 dials the extension number '+4000' of the telephone 11, the register trunk 40
and transmits it to the CPU 60 via the control circuit 50.

The CPU 60 controls the subscriber circuit 21 to call the telephone 11, causes the tone generating circuit 30 to send a ring tone to the telephone 10, and further reads a predetermined time from the memory 70 and sets it in the clock circuit 80. circuit 8
0 means that the CPU will
Let 60 know. The CPt 160 reads grouping extension number information for the already set telephone set 11 from the memory 70 and sets subscriber circuits 22 and 23 corresponding to each of them.
．． The CPU 60 also instructs the tone generation circuit 30 to send a ring tone B to the telephone 10. When the ring tone A changes to the ring tone B, the telephone 10 knows that the call to a specific extension has changed to a simultaneous call to other extensions within a predetermined group.

Telephone 10 goes on-hook if it does not want to continue calling other extensions simultaneously. When the operator of the telephone 12 answers the simultaneous calls to other extensions, the display section of the telephone 12 is notified that the call is to the telephone 11. And C.P.
U 60 is a communication path via the control circuit 50! 41 and connects telephones 10 and 12.

〔Effect of the invention〕

As explained above, the present invention, when calling a specific extension, detects no response for a certain period of time, calls all the extensions in the group at the same time. Other extensions in the group can answer from the extension on their own desk, eliminating hassle.
The extension operator on the calling side can sense that a specific extension operator is away from his/her seat by changing the ringing tone, and has the effect of being able to choose whether to continue calling or to stop the call.

[Brief explanation of the drawing]

FIG. 1 is a relay system diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram showing the main parts of FIG. 1. 1...Call network 10, 11, 12, 13, 14...
・Telephone with display unit 20 to 24 subscriber circuit 30...
・Tone generation circuit 40...Register trunk 50・
・Control circuit 60...CPU 70・
...Memory 80...Clock circuit patent applicant NEC Corporation

Claims (1)

[Claims] (1) In a private automatic branch exchange equipped with a telephone with a display, a means for forming a group between a specified extension and other extensions and a clock circuit are provided, and when a call is made to a specified extension, if no response is detected for a certain period of time, the group is formed. An extension calling method characterized by calling other extensions at the same time.