Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent
1992-01-23
1994-02-01
Dwyer, James L.
Telephonic communications
Plural exchange network or interconnection
With interexchange network routing
379230, 379224, H04M 714
Patent
active
RE0345296
ABSTRACT:
In a private communication network (10) served by a provider of call interconnection services, e.g., a carrier service node (15), the number of trunks (50-52) used within a call path is reduced without affecting the private nature of the private network. The service provider serves customer calls by means of a service node controller (SNC 40)--a switch such as a PBX. The SNC directly interconnects trunks (50,51) that connect it with a call-source and a call-destination node (20,21) of the customer, without routing the call through the customer's tandem node (24). The SNC merely queries the customer's tandem node over a control link (53), such as an ISDN D channel, to obtain requisite call-routing information from the customer's database (60). The customer retains ownership and control of the tandem node and its database, thereby preserving the private nature of the private network.
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Bicknell Rainie M.
Kittredge Barbara J.
Palmer Craig F.
Young Robert L.
AT&T Bell Laboratories
Dwyer James L.
Matar Ahmad F.
Volejnicek David
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