JPH0670016A - Call waiting system - Google Patents

Abstract

PURPOSE:To distinguish a caller corresponding to a call incoming indication tone showing priority at the time of executing interruption by excluding call waiting interruption excepting for a call designated in advance. CONSTITUTION:Corresponding to the telephone number of a subscriber 1, a data base 5 registers an identifier and the priority information for permitting call waiting incoming received from the subscriber 1. When the subscriber 1 receives a specified number inputted from a subscriber 3 originating a call to the subscriber 1 for the interrupting call incoming of call waiting the telephone number of the subscriber 1 and the identifier while speaking with a subscriber 2, the data base 5 is activated by an exchange 4, and the telephone number of the subscriber 1 and the identifier received from the subscriber 3 are transmitted and collated with the identifier registered in advance. When they are coincident, a permission signal is received together with the priority information and when they are not coincident, a non-permission signal is received. When this permission signal is received, the interruption call incoming indication tone corresponding to the priority information is sent to the subscriber 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call waiting system in an exchange.

[0002]

2. Description of the Related Art In the conventional call waiting system,
If the central control unit of the exchange detects that the first subscriber having the call waiting service has received a call from the third subscriber to the first subscriber during a call with the second subscriber, all The configuration is such that call waiting is executed to receive an incoming call, and the same incoming call display sound (ringtone) is always connected to the first subscriber.

[0003]

In this conventional call waiting system, when a subscriber having a call waiting service receives an incoming call from a third party during a call,
Always perform call waiting termination for calls from all subscribers. From the perspective of service subscribers,
Even if the call is from a subscriber who does not want to be interrupted to the current call, it is impossible to determine whether the call is from an important person until the call waiting is received and the received call is answered. . Further, from the viewpoint of the call waiting interruption side, there is a problem that the interruption reception is made without the intention of interrupting the subscriber who is talking to receive the call.

[0004]

According to the call waiting system of the present invention, an operation program is input from a first subscriber who is provided with a call waiting service in a storage program control type exchange equipped with a call waiting service control means. If it is recognized that the number is a specific number for call waiting incoming permission registration,
A database connected to the exchange is activated, and an identifier for permitting call waiting reception received from the first subscriber is registered in the database in association with the telephone number of the first subscriber. While the first subscriber is in a call with the second subscriber, a specific number for performing an incoming call interruption by call waiting, which is input from the third subscriber who calls the first subscriber, When the telephone number and the identifier of the first subscriber are received, the database is activated and the telephone number and the identifier of the first subscriber received from the third subscriber are transmitted to correspond to the first subscriber. When a match is found, a permission signal is received, and when a non-match is received, a non-permission signal is received. A configuration for transmitting sound, the first priority information identifier received from said first subscriber
Registered in the database in association with the subscribers, and the permission signal is received together with the priority information, and an interruption incoming call indication sound corresponding to the priority information is sent to the first subscriber. In addition, when the specific number, the telephone number and the identifier of the first subscriber are not received from the third subscriber, a busy tone is transmitted to the third subscriber. In the case where the first and third subscribers are accommodated in different exchanges, when the originating exchange that accommodates the third subscriber receives the permission signal, the originating exchange is assigned a No. It is also possible to adopt a configuration in which the priority information is added to a call setup message using a line compatible with the 7-signal system, and the call setup message is sent to the terminating side exchange that accommodates the first subscriber.

[0005]

The present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining a first embodiment of a call waiting system of the present invention. In a switch 4 of a stored program control type having a central control unit (not shown) which is a call waiting service control means. , A subscriber 1 to which a database 5 is connected and which has a call waiting service, a subscriber 2 who is in a call with the subscriber 1 and a subscriber 3 who calls the subscriber 1 are accommodated in the same exchange 4. It is shown. The exchange 4 is provided with a sound source for an incoming call display sound (ring tone) indicating an interruption and a sound source for a call back sound to be sent to a caller.

First, the subscriber 1 registers the identifiers in the database 5 by priority using a specific access code. When the central control unit of the exchange 4 identifies that the access code operated and input by the subscriber 1 is a specific number for call waiting incoming permission registration, the database 5 is activated and received from the subscriber 1. An identifier for permitting call waiting (for example, the subscriber number of the other party) and this priority information are registered in the database 5 in association with the telephone number of the subscriber 1.

After the registration, the processing procedure for executing the call waiting interrupt from the subscriber 3 while the subscriber 1 and the subscriber 2 are talking is shown below. The subscriber 3 dials the access code for performing the call waiting, the number and the identifier of the subscriber 1. Receiving this, the central control unit of the exchange 4 transmits the destination number (telephone number of the subscriber 1) and the dialed identifier to the database 5 and inquires whether call waiting is possible or not.

The database 5 collates with the priority-based identifiers of the subscribers 1 registered in advance, and if they match,
A permission signal indicating the priority of the matched identifier and the call waiting permission is returned to the central controller as a response. The central control unit, which receives the response of the permission, executes the call waiting interruption reception for the subscriber 1. At this time,
A ringtone is transmitted to the subscriber 1, and this ringtone is a different tone according to the priority of the matched identifier.
To identify the calling subscriber.

On the other hand, the central control unit of the exchange 4 which receives the response of the call waiting disapproval from the database 5 connects an announcement (not shown) informing the subscriber 3 that the dialed identifier is incorrect. To do.

FIG. 2 is a diagram for explaining a second embodiment of the call waiting system of the present invention, in which a subscriber 1 having a call waiting service and a subscriber 3 calling this subscriber are different exchanges. The exchanges 6 and 7 are No. The case of connection by a 7-signal line is shown. In this case, the database 5 is the exchange 6,
7 Both are accessed and commonly used.

First, the subscriber 1 registers an identifier for each priority in the database 5. At this time, the central control unit (not shown) of the exchange 6 sends the number of the subscriber 1, the priority to be registered and the identifier to the database 5 as in the first embodiment.

After the registration, the processing procedure for executing the call waiting interrupt from the subscriber 3 while the subscriber 1 and the subscriber 2 are talking is shown below. The subscriber 3 dials the access code for performing the call waiting, the number and the identifier of the subscriber 1. Receiving this, the central control unit (not shown) of the exchange 7 transmits the destination number (telephone number of the subscriber 1) and the dialed identifier to the database 5 and inquires whether call waiting is possible or not.

The database 5 collates with the priority-based identifiers of the subscriber 1 registered in advance, and if they match,
The priority signal of the matching identifier and a permission signal indicating permission for call waiting are returned to the central control unit of the exchange 7 as a response. The central control unit of the exchange 7 which has received the response of the permission is No. A call setup message IAM (Initial Address Me
The call waiting interrupt execution priority information is placed on the message, and a call request is made to the exchange 6 accommodating the subscriber 1. The central control unit of the exchange 6 which has received this request executes a call waiting interrupt to the subscriber 1. A calling back tone is connected to the calling subscriber 3 and an interrupting call arrival tone according to the received execution priority is connected to the interrupted subscriber 1.

When a response indicating that the call waiting is not permitted is received from the database 5, the central control unit of the exchange 7 connects an announcement (not shown) informing the subscriber 3 that the dialed identifier is incorrect. Then
No call setup message is sent to the exchange 6.

In the first and second embodiments, the case where the subscriber 1 registers both the identifier for permitting the call waiting and the priority information is shown. However, only the identifier is registered and the call waiting is thereby performed. Whether or not to execute may be determined.

Further, in any of the first and second embodiments, if the identifier cannot be received from the subscriber 3 after the registration is performed, the subscriber 1 is not interrupted and does not receive the interrupt call. The busy tone is sent to the person 3.

[0017]

As described above, according to the present invention, the call waiting interrupt can be made only for the calls that match the pre-registered identifier. Therefore, it is possible to eliminate the interrupts other than the important call specified in advance. In addition, priority is given to the identifier, and the interrupted incoming call display sound according to the priority of the matched identifier is connected to the person to be interrupted, so it is easy to classify the caller and which telephone line the caller calls. You can distinguish yourself, whether you are using it or not. In addition, the calling subscriber can avoid an interrupted call without dialing the identifier if he / she is not willing to interrupt the calling party.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a first embodiment of a call waiting system of the present invention.

FIG. 2 is a diagram for explaining a second embodiment of the call waiting system of the present invention.

[Explanation of symbols]

 1,2,3 Subscriber 4,6,7 Exchange 5 Database

Claims (4)

[Claims] 1. In a storage program control type exchange equipped with call waiting service control means, a number operated and input by a first subscriber who is provided with a call waiting service is a specific number for registration of call waiting incoming permission. If it is recognized that
A database connected to the exchange is activated, and an identifier for permitting call waiting reception received from the first subscriber is registered in the database in association with the telephone number of the first subscriber. While the first subscriber is in a call with the second subscriber, a specific number for performing an incoming call interruption by call waiting, which is input from the third subscriber who calls the first subscriber, When the telephone number and the identifier of the first subscriber are received, the database is activated and the telephone number and the identifier of the first subscriber received from the third subscriber are transmitted to correspond to the first subscriber. When a match is found, a permission signal is received, and when a non-match is received, a non-permission signal is received. Call waiting mode, characterized by delivering the sound. 2. The priority information of the identifier received from the first subscriber is registered in the database in association with the first subscriber, and the permission signal is received together with the priority information. 2. The call waiting system according to claim 1, wherein an interruption incoming call display sound corresponding to the priority information is sent to the first subscriber. 3. When the specific number, the telephone number and the identifier of the first subscriber are not received from the third subscriber, a busy tone is sent to the third subscriber. The call waiting system according to claim 1 or 2. 4. When the first and third subscribers are accommodated in different exchanges, when the originating exchange that accommodates the third subscriber receives the permission signal, the originating exchange No. 3. The call waiting according to claim 1 or 2, wherein the priority information is added to a call setup message using a line supporting a 7-signal system, and the call setup message is sent to an exchange on the called side accommodating the first subscriber. method.