Telephonic communications – Centralized switching system – Class of service determination or transmission
Patent
1992-01-22
1993-07-06
Dwyer, James L.
Telephonic communications
Centralized switching system
Class of service determination or transmission
379289, 379221, 379201, H04M 342
Patent
active
052260755
ABSTRACT:
A communication network uses a network switch number (NSN) and a class-of-service classification (COS) code to route calls through the network. When a call is received at an originating switch of the network, the dialed number is used to select the NSN which identifies a network terminating switch which connects to the called party. The network uses received call signaling information and stored trunk information and possibly network database information to determine the COS code. The COS code is also used at the terminating switch to identify the type of service trunk to connect to the called party. In another feature, only the network switch number is used to route the call over the network. In accordance with yet another feature, the COS code may be used to select specific network trunks without requiring the specification of the NSN.
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Funk Michael W.
Lawson Sue A.
McGuigan David F.
AT&T Bell Laboratories
Caccuro John A.
Dwyer James L.
Matar Ahmad F.
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