Method and apparatus for informing active subscriber of disconne

Details Method and apparatus for informing active subscriber of disconne Method and apparatus for informing active subscriber of disconne

1995-06-07

1996-07-23

Matar, Ahmad F.

Telephonic communications

Special services

Call waiting

379201, 379393, 379257, H04M 342

Patent

active

055398146

ABSTRACT:
When a subscriber A provided with a call-waiting service and connected to a subscriber B is called by another subscriber C and when the subscriber A responds to a call-waiting tone, the subscriber A is connected to the subscriber C and the subscriber B is held according to a procedure of the call-waiting service. If the subscriber B replaces the handset, a clearing intrusion tone (CIT) is sent to the subscriber A before changing a three-way connection to a connection between the subscriber A and the subscriber C, and the subscriber A notices that the held subscriber B is disconnected before attempting to communicate with the subscriber B and without having to rely on a busy signal.

REFERENCES:
patent: 3742151 (1973-06-01), Ruether
patent: 4001520 (1977-01-01), Waldman et al.
patent: 5195087 (1993-03-01), Bennett et al.

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