What does VT stand for?

It achieves the seamlessly scalable virtual tributary processing and cross-connect solution required for next generation Access and Metro networks.

BUSINESS WIRE)--June 7, 2004 "Framer That Grooms" delivers carrier-grade virtual tributary processing and cross-connect for "Switchless Switching" architecture in metro and access networks TranSwitch(R) Corporation (NASDAQ: TXCC), a leading developer and global supplier of innovative, high speed VLSI semiconductor solutions, today announced the PHAST(R)-48V (TXC-06965) framer that delivers carrier-grade tributary grooming and cross-connect capability for telecom networks.

BUSINESS WIRE)--June 7, 2004 VLSI devices empower carriers to deploy "Switchless Switching" VT grooming architecture in metro and access networks TranSwitch(R) Corporation (NASDAQ: TXCC), a leading developer and global supplier of innovative, high speed VLSI semiconductor solutions, today announced its new Virtual Tributary Cross Point (VTXP(TM)) family of carrier-grade grooming and cross-connect solutions for access and metro networks.

By incorporating an Ethernet Media Access Control (MAC) function, a sophisticated buffering strategy, 84 channel VT/TU ( Virtual Tributary / Tributary Unit) mapping, VC-3/VC-4 mapping and virtual concatenation, the EtherMap-3 can provide intelligent flexible broadband multi-megabit Ethernet services over SONET/SDH.

5, or virtual tributary, is a logical T1 within a SONET network.

The FLASH Line of Products The FLASH600 ADX, with its state of the art SONET capabilities, unmatched virtual tributary grooming capabilities and unique integrated ATM switching capabilities, is a multi-service SONET platform.

Physical layer specification for local connectivity between ATM devices VoX Voice Operated eXchange VT Mapper Virtual Tributary Mapper WAN Wide Area Network (c)Copyright PMC-Sierra, Inc.

The ZEN-TSP provides flexible virtual tributary handling for Sonet/SDH OC-192/STM-64 applications down to STS-1 level granularity in a highly integrated package.