Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Patent
1997-07-21
2000-01-11
Hong, Harry S.
Telephonic communications
Centralized switching system
Switching controlled in response to called station...
370466, 370467, 379 9331, 39518315, H04M 300, H04M 1100, H04J 302
Patent
active
060144408
ABSTRACT:
A method for protocol negotiation between an originating call handler and a terminating call handler, both of which reside within a switching node of a telecommunications network. A call initiated by an originating agency is transmitted to the originating call handler. The originating call handler transfers the call to the terminating call handler which completes the call to a terminating agency. Prior to transfer between handlers, a transfer protocol is determined. If the originating and terminating call handlers share a common native protocol, the common native protocol is selected for transfers therebetween. If the handlers do not share a common native protocol, the native protocol of the originating call handler is selected for transfers therebetween if a non-native protocol of the terminating call handler matches the native protocol of the originating call handler. Conversely, the native protocol of the terminating call handler is selected for transfers therebetween if a non-native protocol of the originating call handler matches the native protocol of the terminating call handler. If none of the aforementioned relationships are present, but the originating and terminating call handlers share a common non-native protocol, the common non-native protocol is selected for transfers therebetween. Otherwise, the call is rejected.
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Herbert Mark L.
Melkild Keith W.
Roeten Brian M.
Hong Harry S.
Northern Telecom Limited
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