Method and apparatus for alternate destination routing for switc

Details Method and apparatus for alternate destination routing for switc Method and apparatus for alternate destination routing for switc

1994-12-27

1996-01-02

Hofsass, Jeffery A.

Telephonic communications

Special services

Reserved call

379201, 379207, 379211, 379212, H04M 354

Patent

active

054816025

ABSTRACT:
Redirection of calls from a busy primary destination to a secondary destination of a switched egress alternate destination redirection (ADR) customer is performed in the absence of sufficient terminating line status information in the form of either a busy or free indication being provided to the originating switch which provides the ADR service feature capability. The originating switch infers that the primary destination is busy and redirects the call to the secondary destination accordingly if the time that passes since the inception of the call is greater than a predetermined interval in which the call has not been answered.

REFERENCES:
patent: 4674115 (1987-06-01), Kaleita et al.
patent: 5206901 (1993-04-01), Harlow et al.
patent: 5369695 (1994-11-01), Chakravarti et al.

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