Patent ID: 7136378
Filing Date: 2006-11-14
Classification: H04J,H04L,H04Q

Abstract:
1. A method for providing secure communications through a communications network comprising ATM channels and TDM channels, the communications network including at least one closed user group of network elements configured to communicate with only other network elements in the closed user group, the method comprising: receiving 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 interfacing a first network element of the closed user group with the ATM switch; verifying that an ATM End System Address (AESA) contained in calling party information of the connection setup request is consistent with the attached UNI; and establishing 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.