Patent ID: 6421344
Filing Date: 2002-07-16
Classification: H04J,H04L,H04Q

Abstract:
A telecommunications system for routing information in an asynchronous transfer mode (ATM) system with ATM cells that contain a virtual path identification/virtual channel identification (VPI/VCI), wherein the information is from a first DS0 in a first T1 Superframe/Extended Superframe (ESF/SF) system that uses robbed bit signaling and is routed by the ATM system to a second DS0 in a second T1 Superframe/Extended Superframe (ESF/SF) system that uses robbed bit signaling, wherein the system comprises;a first ATM interworking multiplexer that is operational to monitor the robbed bit signaling from the first ESF/SF system, to generate and transmit a message indicating an off-hook state, to receive a message identifying the first DS0 and the VPI/VCI, to convert the information from the first DS0 into ATM cells with the VPI/VCI, to generate an F5 OA&M cell containing frame alignment information and the VPI/VCI, and to transmit the ATM cells; a second ATM interworking multiplexer that is operational to receive a message identifying the VPI/VCI and the second DS0, to receive the ATM cells with the VPI/VCI , to convert the ATM cells to information for the second DS0 using the frame alignment information, and to transmit the second DS0 to the second ESF/SF system; a signaling processor that is operational to receive the message from the first ATM multiplexer, to select the VPI/VCI and the second DS0 in response to the off-hook state, to generate and transmit the message to the first ATM multiplexer identifying the first DS0 and the VPI/VCI, and to generate and transmit the message to the second ATM multiplexer identifying the second DS0 and the VPI/VCI; a first link from the first ATM multiplexer to the signaling processor operational to transfer the messages; a second link from the second ATM multiplexer to the signaling processor operational to transfer the message; and an ATM routing system that is operational to route the ATM cells between the first ATM multiplexer and the second ATM multiplexer based on the VPI/VCI.