Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
2006-11-14
2006-11-14
Harper, Kevin C. (Department: 2616)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S395300
Reexamination Certificate
active
07136378
ABSTRACT:
A method for providing secure communications through a communications network comprising ATM channels and TDM channels. The communications network includes at least one closed user group of network elements configured to communicate with only other network elements in the closed user group. The method receives a connection setup request at an ingress ATM switch, via a UNI attached to the ATM switch, in response to a call initiated through a TDM channel. The UNI interfaces a first network element of the closed user group with the ATM switch. The method further verifies that an ATM End System Address (AESA) contained in calling party information of the connection setup request is consistent with the attached UNI. Additionally, the method establishes a connection with at least a second network element of the closed user group through an egress ATM switch in the communications network when the AESA is consistent with the attached UNI.
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Bi Haifeng
Sigarto Tina M.
Stafford Matthew Wayne
Greenblum & Bernstein P.L.C.
Harper Kevin C.
SBC Technology Resources Inc.
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