Callback when not engaged by means of automated redialling...

Details Callback when not engaged by means of automated redialling... Callback when not engaged by means of automated redialling...

2002-10-15

2008-12-23

Pham, Tuan A (Department: 2618)

Telephonic communications

Special services

Repetitive call attempts

C379S210010, C379S210020, C379S210030, C455S414100, C455S417000, C455S555000

Reexamination Certificate

active

07469044

ABSTRACT:
The invention relates to a method of redialing in telecommunication networks for a call back when not engaged, whereby a caller carries out a call attempt to reach a callee, whereby the callee does not respond at firs. According to the invention, the callee may be reached without the caller having to continually undertake a further call attempt, whereby a radialling is automatically carried out by the relevant exchange within a given time window at given time periods and a connection to the callee is established should the same respond.

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patent: 2002/0141557 (2002-10-01), Strandberg
patent: 19709408 (1998-08-01), None

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