The Cisco AS5850 universal gateway supports channelized T1 (CT1) and E1 (CE1) ingress interfaces that provide a synchronous telecommunications interface in both North American and international environments. The 24 channelized T1/E1 trunk card supports 24 CT1 or CE1 connections, and the Cisco AS5850 can hold as many as two 24 channelized T1/E1 trunk cards per route switch controller (RSC).