JPH104455A - Extension interrupt system and electronic exchange adopting the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic exchange adopting the extension interrupt system in which lots of unspecified users interrupt a busy extension user on emergency. SOLUTION: This electronic exchange 1 has extension telephone sets (STA-B, STA-C) and external trunks (COT, CFT) and is provided with a memory to which other caller identification information than a telephone number of other extension user or an external line user being a speech opposite party is registered. While the extension users STA-B, STA-C are busy, a telephone number and caller identification information to call the extension user STA-B are received by an office line trunk COT from a subscriber A as an external line user via a public network, the caller side identification information is compared with the caller identification information registered in the memory, resulting that access is recognized twice, the interrupt to the busy extension user STA-B is executed by an interrupt trunk CFT.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension interruption method for causing an unspecified number of users to perform an emergency interruption to a busy extension user and an electronic exchange (PBX) to which the extension interruption method is applied.

[0002]

2. Description of the Related Art Conventionally, as a technique related to this kind of extension interruption method, there is an interruption control method using an ID code disclosed in Japanese Patent Application Laid-Open No. 5-122340.

In this interrupt control method, an extension user previously registers an ID code for permitting an interrupt in a memory of each extension of the electronic exchange in order to permit an interruption during a busy time, and the actual busy time is determined. In this case, the interruption is permitted only when the number dialed by the outside line user matches the ID code.

More specifically, an extension user first registers an ID code for permitting interruption in a memory for each extension of the electronic exchange when it is desired to permit interruption of only a part of incoming calls during a call.

Therefore, when an extension user receives a call from an outside line user during a call, the electronic exchange transmits a busy tone to the outside line. The outside line user can recognize from the busy tone that the called extension is busy. If the outside line user desires an interruption, the outside line user dials the ID code. In the electronic exchange, the ID code dialed by the outside line user and the ID code registered in the memory are compared and matched. Or not, and as a result,
If they match, the corresponding busy extension is interrupted.

That is, the electronic exchange has an extension telephone and an external trunk, and is used for making a telephone call between extension telephones or between an extension telephone and an external telephone. It functions so that users and outside line users can interrupt.

[0007] Incidentally, other techniques related to the interruption to the busy extension in such an electronic exchange include:
For example, a busy extension waiting method disclosed in JP-A-61-253963 and an extension interruption method disclosed in JP-A-63-107344 may be used.

[0008]

In the case of the above-described interrupt control system using an ID code, it is assumed that an outside line user knows an ID code for performing an interrupt during a busy period, so that an unspecified number is required. There is a problem that the user cannot interrupt in an emergency.

If the ID code is changed to a simple number to notify an unspecified number of users, most of the outside line users will dial such a number. There is also a problem that it is difficult to respond to the original purpose.

The present invention has been made to solve such a problem, and a technical problem of the present invention is to provide an extension interrupt that allows an unspecified number of users to interrupt a busy extension user in an emergency. An object of the present invention is to provide a method and an electronic exchange to which the method is applied.

[0011]

According to the present invention, when an extension user or an outside line user interrupts a busy extension user, the other extension user uses the other extension. Interruption to the busy extension user when access is recognized twice as a result of recognizing the incoming of the calling party identification information different from the destination extension number transmitted from the user side or the external line user side The extension interruption method of executing

On the other hand, according to the present invention, there is provided a memory for registering caller identification information different from a telephone number relating to another extension user or an outside line user as a communication partner, and If the access is recognized twice based on the result of comparing and comparing the calling party identification information received and received from the outside line user with the calling party identification information registered in the memory, an interruption to the busy extension user is interrupted. An electronic exchange to run is obtained.

Further, according to the present invention, in the above-mentioned electronic exchange, when the calling party identification information registered in the memory is searched for in the comparison and collation, and there is no information corresponding to the called party identification information received, the incoming call is received. The electronic exchange that registers the caller identification information as new caller identification information with a timer for a predetermined set time and performs registration in the memory is obtained.

Further, according to the present invention, in the above-mentioned electronic exchange, an electronic exchange is provided which eliminates a block containing the corresponding calling side identification information in the memory when the set time of the timer has expired.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An extension interruption system according to the present invention and an electronic exchange to which the invention is applied will be described in detail with reference to the drawings.

First, the outline of the extension interruption method of the present invention will be briefly described. In this extension interruption method, when another extension user or outside line user interrupts a busy extension user, a call is sent from another extension user side or outside line user side on the busy extension user side. Depending on the result of recognizing the incoming of the calling party identification information that is different from the destination extension, the access is 2
If the call is recognized twice, an interruption to the busy extension user is executed.

FIG. 1 shows a basic configuration of a telephone line network including an electronic exchange 1 according to an embodiment to which the extension interruption method is applied. FIG. This figure relates to the state in which the calling party identification information is received from the same outside line subscriber within a certain period of time for a specific extension user. The interrupted state.

This electronic exchange 1 has an extension telephone (STA).
-B, STA-C) and external trunk (COT, CF)
T), and a memory for registering calling-side identification information such as a dial number different from a telephone number of another extension user or outside-line user to be a call partner.

The operation of the electronic exchange 1 will be described. When a subscriber A as an outside line user calls an extension user STA-B via a public network, an incoming call from the outside line subscriber A is received in the central office trunk COT. Is detected. Office line trunk CO
After detecting the incoming call, T receives the destination extension number and the calling number of the subscriber A.

Therefore, the CPU of the electronic exchange 1 determines whether the extension user STA-B is idle or busy based on the extension number of the destination. If free, the incoming call to the extension user STA-B is processed by a normal connection operation.

If the extension user STA-B is busy with the extension user STA-C as shown in FIG.
The CPU of the electronic exchange 1 searches the memory to identify whether or not the calling party identification information of the external subscriber A is registered. If the calling party identification information is not registered, the identification of the calling party from the received external subscriber A is performed. The information is regarded as new transmitting side identification information, a timer for a predetermined set time (for example, 3 minutes) is attached, and the information is divided into blocks and registered in the memory.

The memory here is provided with a timer for a predetermined set time as shown in FIG.
0 to blockn) (here, n = 3 and 4 blocks), and new caller identification information (call I
At the time of registration of D), a timer is set. When the timer times out, a block including the corresponding transmitting side identification information in the memory is cleared (eliminated).

Here, if the access has been recognized twice as a result of comparing the calling party identification information at the time of the incoming call with the calling party identification information in the memory if it has already been registered,
That is, if there is an incoming call from the outside line subscriber A repeatedly within a certain period of time, it is determined that the incoming call is an urgent incoming call, and as shown in FIG. Perform an interrupt to.

[0024]

As described above, according to the extension interruption system of the present invention and the electronic exchange to which the extension interruption system is applied, the interruption to the busy extension user can be interrupted by another extension user or outside line user of the communication partner. In the case that an access is recognized twice within a certain time according to the calling party identification information different from the telephone number related to the You will be able to interrupt.

[Brief description of the drawings]

FIG. 1 shows a basic configuration of a telephone line network including an electronic exchange according to an embodiment to which an extension interruption system of the present invention is applied, wherein (a) shows a case where extension users use a specific extension during a call. (B) is a state in which a specific extension user has been interrupted during a call between extension users during a call between the extension line users within a certain period of time from the same outside line subscriber. It is about.

FIG. 2 is a schematic diagram showing the contents of a memory provided in the electronic exchange shown in FIG. 1;

[Explanation of symbols]

 1 electronic exchange 2 memory

Claims (4)

[Claims] 1. When a busy extension user is interrupted by another extension user or an outside line user, the busy extension user side receives the interruption from the other extension user side or the outside line user side. An extension interruption characterized by executing an interruption to the busy extension user side when access is recognized twice as a result of recognizing the incoming of the calling side identification information different from the called extension number of the called destination. method. 2. A memory for registering caller identification information different from a telephone number of another extension user or outside line user to be called, and a call is transmitted from the extension user or the outside line user. Interrupting a busy extension user when access is recognized twice based on the result of comparing the incoming caller identification information received and the caller identification information registered in the memory. Electronic exchange. 3. The electronic exchange according to claim 2, wherein, at the time of said comparison and collation, if the calling party identification information registered in said memory is searched and there is no information corresponding to said incoming calling party identification information, An electronic exchange characterized by receiving incoming caller-side identification information as new caller-side identification information, attaching a timer for a predetermined set time, dividing the block into blocks, and performing registration in the memory. 4. The electronic exchange according to claim 3, wherein when the set time of the timer times out, a block containing the corresponding calling side identification information in the memory is eliminated.