JPS5963856A - Automatic informing method of terminating call - Google Patents

Abstract

PURPOSE:To inform automatically the sending of a new terminating call to the terminating subscriber's side in busy by introducing a specific tone with the current call for a short time to listen the tone to the terminating subscriber when another calling subscriber calls the terminating subscriber in busy. CONSTITUTION:When a subscriber A sends a call to a subscriber B and listens to a busy tone, a central controller CPU registers fixed timing number N in an area of a timing counter T1 in a subscriber's data table P1 of the subscriber A on a main memory MM and stores ''1'' in a timing information processing and registering part as the registration of the necessity of automatic terminating information. Subsequently, the central controller CPU subtracts ''1'' from the timing value N of the subscriber A of which timing information processing and registering part is ''1'' during interruption every one second. After repeating said operation by N times and confirming ''0'' at the Nth time, automatic termination informing method is executed by the same processing as the detection of the previously described specific dial.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an automatic incoming call notification system for a busy party used in an automatic switchboard.

Conventional configuration and its problems In the conventional incoming call notification system, the above function was enabled by the calling party making a special dial for incoming call notification after hearing a busy tone.

This method will be explained with reference to FIG. A to C are subscribers, SW is the communication path network, SPC is the communication path control device, CPU
is the central control unit, SPT is the first special sound generation circuit, CM
T is a second special sound generation circuit, and BT is a busy tone generation circuit.

In FIG. 1, subscribers B and C are talking, and in this state, subscriber A dials subscriber B and attempts to call him. Of course, elderly people who subscribe use the busy tone generation circuit BT.
Hear the busy tone from. In the conventional system, if the elderly subscriber wishes to transmit the incoming call to subscriber B at this point, he/she performs a special dial (for example, hooking) and is notified of this by playing a special tone.

That is, when the central control unit (5PU) detects that a special dial has been made for the elderly person, the route 1 is cut off for the elderly person and the first special sound generation circuit SPT sends the first
A special notification sound is sent via route 2 (at the same time, route 4 is disconnected during this time). When the time limit measured by the central control unit CPU has elapsed, path 4 is reconnected, and at the same time, a second special tone is sent out through path 3 to notify subscriber A that it is waiting for a response from subscriber B.

This completes the incoming call notification process. Next, in this state, subscriber B hears the first special tone and learns that there is a new incoming call, and makes a special dial (for example, hooking) to respond to the subscribed elderly person, thereby entering the call state. , subscriber C is placed on hold. According to this method, to notify a busy subscriber of an incoming call,
There was a problem in that a special dial was required to receive incoming calls.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned conventional problems and to enable automatic incoming call notification.

Structure of the Invention The present invention provides that when another caller calls a subscriber who is currently communicating, after the caller hears a busy tone for a certain period of time, the incoming call is automatically interrupted. The caller is notified that there is a new incoming call by playing a special tone that briefly interrupts the call, and the caller is also notified by a similar tone that the called party has been notified of the new call. It is configured to notify you.

DESCRIPTION OF EMBODIMENTS The present invention will be explained below by way of an embodiment thereof with reference to the drawings. In FIG. 2, parts corresponding to those in FIG. 1 are given the same numbers. MM is a main memory, Pl is a subscriber data table provided therein, T1 is a time counter, Fl is a time notification processing registration section, and CLK is a time clock generation section.

Next, the operation of this embodiment will be explained. Central control unit CPH
A time clock generator CLK with a period of 1 second is provided outside the
Interrupts the central control unit CPU.

Then, when the subscriber calls subscriber B and hears the busy tone, the central control unit CPU stores subscriber A's subscriber data table P in main memory MM.
1, a predetermined time limit number K is registered in the area of the time limit counter T1, and 1 is stored in the time limit notification processing registration section F1 as a registration that automatic incoming notification is required. Next, the central control unit CPU decrements by 1 the time limit value N of the subscriber A whose time limit notification processing registration unit F1 is 1 during interrupt processing every second. This operation is repeated N times, and when it is confirmed that the value is 0 for the Nth time, an automatic call notification method is performed using the same process as when a special dial (for example, hooking) is detected as described above.

As described in detail, the present invention has the advantage that in addition to the special dial notification method, incoming call notification is automatically performed after a certain period of time. In addition, since a special sound trunk is provided for notification of incoming calls, the notification of incoming calls can be made clear by using that sound.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a device using a conventional incoming call notification method, and FIG. 2 is a block diagram of a device to which an automatic incoming call notification method according to an embodiment of the present invention is applied. A-C...Subscriber, SW...Call path diagram, SPA...Call path control device, CP...
...Central control unit, SPT...First special sound generation circuit, CMT...Second special sound generation circuit, MM...
...Main storage device, Pl ...Subscriber table, T1 ...Time counter, Fl...
- Time limit notification processing registration unit, CLK...Time limit clock generation unit. Agent Toshio Nakao and 1 other person

Claims (1)

[Claims] When a subscriber who is currently on the line is called by another ringing tone, the fact that the calling party has been called is registered in the subscriber data table of the subscriber in the main memory; , the decrease in the time limit value is counted by a time limit counter, and when the time limit value reaches 0, a special tone is emitted to the busy subscriber and another caller via the central control unit and the channel control unit. Automatic incoming call notification method that will notify you.