H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 3/54 (2006.01) H04Q 3/66 (2006.01) H04M 7/00 (2006.01)
Patent
CA 2163577
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 busy and free indications 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.
Griffiths Richard William
Krilcich Rose A.
Kuchenbecker William G.
Richardson Bryan M.
At&t Corp.
Kirby Eades Gale Baker
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