PUBLIC SWITCHED TELEPHONE NETWORK CALL ROUTING USING DYNAMIC ASYNCHRONOUS MODE TRANSFER BEARER VOICE TRUNKING

摘要

The distributed architecture switch of the invention provides a scalable, flexible switching device to route telephone calls and other data (e.g., frame relay, ISDN) over an asynchronous transfer mode (ATM) network (230). The switch includes multiple service modules (450, 452, 456 and 458) that can be geographically disparate and function as a single switching device. The multiple service modules (450, 452, 456 and 458) are coupled to a system controller (430 and 438) that controls the service modules (450, 452, 456 and 458) and passes messages between the service modules (450, 452, 456 and 458).