Telephonic communications – Special services – Service trigger
Patent
1992-12-18
1995-02-14
Dwyer, James L.
Telephonic communications
Special services
Service trigger
379 67, 379 93, 379201, 379202, 379210, 379220, 370 62, H04M 342
Patent
active
053902416
ABSTRACT:
Allowing a shared line appearance feature to be implemented on a plurality of telephone station sets which are connected to different telecommunication switching systems. The telecommunication switching systems can be interconnected to each other via the public telephone network utilizing standard telecommunication links. A software application program provides a termination point for a directory number that is associated with a shared line appearance. The software application program receives all incoming calls directed to the directory number and determines the operations that should be performed with respect to the telephone station sets terminating the shared line appearance. The software application program directs the incoming calls to the telephone stations sets regardless to which telecommunication system each of the telephone station sets is interconnected. An outgoing call from one of the telephone station sets is switched to the software application program which then switches the outgoing call to the destination telephone terminal as if the outgoing call had originated at the location of the software application program. With respect to the outgoing call, the software application program also transmits messages to the other telephone station sets terminating the shared line appearance, so that those telephone station sets can indicate that the shared line appearance is busy.
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Bales Bruce M.
Crumpley Robert L.
Thieler Stephen M.
AT&T Corp.
Dwyer James L.
Hunter Daniel S.
Moran John C.
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