JPH02216955A - Transfer system for plural incoming calls - Google Patents

Abstract

PURPOSE:To transfer a call to a transfer receiving subscriber as long as one of circuits of the transfer receiving subscriber is kept idle by securing such a constitution where a switchboard decides the idle one of plural circuits of the transfer receiving subscriber based on the registered key number and transfers the idle circuit. CONSTITUTION:The telephone numbers of transfer receiving subscribers 7 are registered to a transfer sending switchboard 5 via the calling subscribers 1, 2 and 3 with use of a key number. When the subscribers 7 receive the calls, the switchboard 5 decides based on the registered key number whether either one of those subscriber circuits 7a-7c is idle or not. If so, the incoming call is sent to the subscriber 7. Thus it is possible to transfer plural incoming calls addressed to the same subscriber 7 to the due subscriber 7 as long as the circuits 7a-7c include an idle one.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a call transfer system, and more particularly to a multi-call call transfer system for a switching system accommodating a transfer destination subscriber having a plurality of subscriber lines.

[Conventional technology]

Conventionally, in this type of call transfer method, when an exchange transfers an incoming call to a transfer source subscriber to a transfer destination subscriber, the transfer information is stored in a transfer monitoring table in the storage section of the exchange, and the transferred call is It monitors the call status, and when it detects the end of the call, it disconnects the various parts and processes charges.

[Problem to be solved by the invention]

In the conventional call diversion method described above, the transfer monitoring table of the exchange stores only one piece of transfer information for one transfer source subscriber, so one call has already been transferred to the transfer destination subscriber. There is a problem in that if there is another incoming call to the transfer source subscriber, the incoming call will not be transferred even if other subscriber lines of the transfer destination subscriber are available.

An object of the present invention is to handle multiple incoming calls to the same forwarding subscriber in a switching system accommodating a forwarding subscriber having multiple subscriber lines, as long as the subscriber line of the forwarding subscriber is free. It is an object of the present invention to provide a multi-call transfer method for transferring calls to a transfer destination subscriber.

[Means to solve the problem]

The multiple call transfer system of the present invention is a call transfer system for a switching system that has multiple subscriber lines and a transfer destination subscriber assigned a single representative number. When the telephone number of the transferee subscriber is registered with the representative number, and there is an incoming call to the transferee subscriber, the exchange registers multiple subscriptions of the transferee subscriber according to the registered representative number. It is characterized in that it is determined whether any of the subscriber lines is free, and if there is a free line, the incoming call is transferred to the transfer destination subscriber.

〔Example〕

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.The multiple call transfer system of this embodiment includes calling subscribers 1 to 3, transfer source subscriber 4, and transfer source subscriber 4. A transfer source exchange 5 that transfers incoming calls, a transfer destination exchange 6 connected to the transfer source exchange 5 via a trunk line, and a plurality of transfer destination subscriber lines 7a.
-7c are connected to the forwarding destination exchange 6 and are assigned a single representative number. The transfer source exchange 5 also stores a transfer registration table 11 in its storage unit 10.
and a transfer monitoring table 12.

The transfer source subscriber 4 who wishes to transfer the 0 incoming call, the operation of which will be explained next, writes the following information in the transfer registration table 11 of the transfer source exchange 5.
The representative number of the transfer destination subscriber 7 is registered as the transfer destination telephone number by dialing a special number for registration.

After registration, when there is an incoming call from the originating subscriber 1 to the forwarding subscriber 4, the forwarding exchange 5 uses its forwarding registration table 1.
1, recognizes the transfer request to the transfer destination subscriber 7,
A connection request is made to the transfer destination exchange 6 that accommodates the transfer destination subscriber 7, and the transfer destination exchange 6 connects the transfer destination subscriber lines 7a to 7.
If there is a vacant state (for example, transfer destination subscriber line 7a), the transfer source exchange 5 is notified and connection processing is performed.When the transfer source exchange 5 transfers the incoming call to the transfer destination subscriber 7, , stores the transfer information in the transfer monitoring table 12,
Monitor call status.

Here, when there is an incoming call from the originating subscriber 2 or 3 to the transferee subscriber 4, the transferee exchange 5 sends a call to the transferee subscriber 7 to the transferee exchange 6 in the same manner as described above. The transfer destination exchange 6 that makes the connection request is the transfer destination subscriber line 7
The transfer source exchange 5 determines whether the lines a to 7C are free and performs connection processing if there is a free line (for example, transfer destination subscriber line 7b).
When the incoming call is transferred to the transfer destination subscriber 7, the transfer information is additionally stored in the transfer monitoring table 12, and the call status is monitored separately from the previously transferred call.

Note that if there is no free space on the transfer destination subscriber lines 7a to 7C, the transfer destination exchange 6 returns the busy information to the transfer source exchange 5, and the transfer source exchange 5 returns the busy information to the originating subscriber. ,
Do not forward incoming calls.

In this way, as long as the transferred subscriber lines 7a to 7C are free, incoming calls to the transferred subscriber 4 are transferred to the transferred subscriber 7.
can be transferred to.

〔Effect of the invention〕

As explained above, according to the multiple call transfer system of the present invention, in a switching system accommodating a transfer destination subscriber having a plurality of subscriber lines, as long as the transfer destination subscriber's subscriber line is vacant, This has the advantage that multiple incoming calls to the same transfer source subscriber can be transferred to the transfer destination subscriber.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1.2.3... Originating subscriber, 4... Transferring subscriber,
5... Source exchange, 6... Destination exchange, 7...
Transfer destination subscriber, 7a, 7b, 7c... Transfer destination subscriber line, 10... Storage unit, 11... Transfer registration table, 12... Transfer monitoring table.

Claims (1)

[Claims] In a call transfer method of a switching system that accommodates a transfer destination subscriber who has a plurality of subscriber lines and is assigned one representative number, the transfer source subscriber registers the transfer destination subscriber's telephone number in the exchange. If the call is made using the representative number and there is an incoming call to the transfer source subscriber, the exchange determines whether any of the plurality of subscriber lines of the transfer destination subscriber is free according to the registered representative number. If there is a vacancy, the incoming call is transferred to the transfer destination subscriber.