Evolution of switching architecture to support voice telephony over ATM

This paper discusses the architectural complexities of extending Lucent's 5 ESS(R)-2000 Digital Switch using the 7R/E(TM) Packet Driver to add voice te lephony over ATM (VTOA) with switched virtual circuits (SVCs). While meetin g customers' tight deadlines for introducing this technology, this project addressed many of today's most complex issues, including platform migration , circuit-to-packet switch conversion, and voice/data migration. To provide the media gateway function, the PacketStar(TM) Access Concentrator (develo ped at Yurie Systems, now part of Lucent Technologies) was incorporated int o Lucent's long-standing, premier switching product, the 5ESS-2000 Switch. Additional forward-looking technology from lucent provided the connection/s ignaling gateway functionality.