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Larscom Orion 7400 Multiservice Access Platform Deploys with TranSwitch EtherMap-3 EoS Mapper.

Business Editors/High-Tech Writers

SHELTON, Conn.--(BUSINESS WIRE)--April 19, 2004

Enables Carriers to Remotely Provision New Ethernet Services in

Existing Metro Networks for Fast Revenue Gains

TranSwitch Corporation (NASDAQ: TXCC) today announced that its highly integrated EtherMap(TM)-3 Ethernet over SONET/SDH (EoS) mapper has been designed into Larscom, Incorporated's (NASDAQ: LARS) Orion 7400 Multiservice Access Platform. The 7400 platform is currently being deployed and benchmarked by several carriers for Internet access, Ethernet Private Line (EPL), Ethernet Virtual Private Line (EVPL) and Transparent LAN (TLAN) services. Larscom is expanding field trials of the system with particular emphasis on the EoS application.

"Larscom's Orion 7400 Multiservice Access Platform deployment incorporating EtherMap-3 validates TranSwitch's first-to-market EoS mapper, which is part of our Ethernet strategy - to offer customers a comprehensive EoS product suite that will allow a smooth migration for SONET/SDH systems to efficiently support existing and new revenue-generating Ethernet services," said Dr. Hoshang Mulla, TranSwitch VP of Marketing. "TranSwitch's broad expertise in Ethernet and SONET/SDH brings tremendous value to OEM developers and carriers by providing significant system integration and performance enhancement. Maintaining our focus on delivering flexible, high performance Ethernet transport devices to telecommunications OEMs will ensure our leading position in the fast-growing EoS marketplace," Dr. Mulla continued.

TranSwitch collaborated closely with Larscom on incorporating the EtherMap-3 device into the Orion 7400 Multiservice Access Platform. During the system development and application testing phases, TranSwitch supplied early device prototypes, API-based driver software and on-going consultation and debugging assistance. "Low order virtually concatenated (VC) traffic which consists of 10/100 Ethernet streams wrapped in GFP, PPP or LAPS is currently the pre-eminent EoS transport protocol. Being able to offer this high-value service will allow us to significantly penetrate the emerging customer premise equipment (CPE) access markets that we serve," stated Gurdip Jande, Vice President of Marketing for Larscom. "With EtherMap-3's additional LCAS functionality, our customers can achieve new levels of bandwidth efficiency and profitability from their SONET/SDH metro rings. The alliance with TranSwitch has provided a key catalyst for realizing our EoS initiatives," he concluded.

The EtherMap-3 device is a critical element in Larscom's Ethernet marketing initiative. Larscom, a leading CPE supplier for TDM and EoS applications, offers carriers significantly improved scalability, reduced footprint size, and greater cost-effectiveness with the new Orion 7400 platform. Carriers can now remotely provision Ethernet services into existing metro networks seamlessly using the Orion 7400, achieving a level of reliability previously associated only with TDM services. These Ethernet services can also be incrementally tuned and adjusted for optimal data/IP bandwidth levels.

The Ethermap-3 is the first-to-market, most versatile OC-3 EoS device for both GigE and 10/100 Ethernet applications. It can be utilized individually or as part of a telecom bus-compatible mapper and framer family to deliver full TDM capability. EtherMap-3's high degree of integration enables direct mapping of 10/100/1000 Mbps Ethernet into SONET/SDH STS-3/STM-1 transport payloads. The device supports connection of up to eight 10/100 Mbps Ethernet ports using SMII interfaces or a single 1000 Mbps Ethernet port using a GMII interface. Ethernet frames are encapsulated using GFP, LAPS, LAPF or PPP/BCP protocol. The encapsulated frames are then mapped into either virtually concatenated low or high order payloads, such as VT1.5 SPE/VC-12/STS-1 SPE/VC-3, or into contiguously concatenated payloads such as STS-3c SPE/VC-4. For both low and high order VC payloads, optional on-chip standards-based LCAS processing allows hitless dynamic bandwidth adjustments. More product information on the EtherMap-3 mapper is available at

About TranSwitch Corporation

TranSwitch Corporation, headquartered in Shelton, Connecticut, is a leading developer and global supplier of innovative high-speed VLSI semiconductor solutions - Connectivity Engines(TM) - to original equipment manufacturers who serve three end-markets: the Worldwide Public Network Infrastructure, the Internet infrastructure, and corporate Wide Area Networks (WANs). Combining its in-depth understanding of applicable global communication standards and its world-class expertise in semiconductor design, TranSwitch Corporation implements communications standards in VLSI solutions which deliver high levels of performance. Committed to providing high-quality products and service, TranSwitch Corporation, Shelton, CT is an ISO 9001:2000 registered company. Detailed information on TranSwitch products, news announcements, seminars, service and support is available on TranSwitch's home page at the World Wide Web site -

Forward-looking statements in this release are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that all forward-looking statements regarding TranSwitch, its operations and its financial results involve risks and uncertainties, including without limitation risks of downturns in economic conditions generally and in the telecommunications and data communications markets and the semiconductor industry specifically; risks in product development and market acceptance of and demand for TranSwitch's products and products developed by TranSwitch's customers; risks relating to TranSwitch's indebtedness; risks of failing to attract and retain key managerial and technical personnel; risks associated with foreign sales and high customer concentration; risks associated with competition and competitive pricing pressures; risks associated with investing in new businesses; risks of dependence on third-party VLSI fabrication facilities; risks related to intellectual property rights and litigation; risks in technology development and commercialization; and other risks detailed in TranSwitch's filings with the Securities and Exchange Commission.

TranSwitch is a registered trademark of TranSwitch Corporation. EtherMap-3 is a trademark of TranSwitch Corporation.

About Larscom

Larscom (NASDAQ: LARS) enables high-speed access by providing cost-effective, highly reliable (carrier-class), and easy-to-use network access equipment. In June 2003, Larscom merged with VINA Technologies to create a worldwide leader in enterprise WAN access for the delivery of high-speed data, and integrated voice and data services with the deployment of more than 350,000 systems worldwide. Larscom's customers include major carriers, Internet service providers, Fortune 500 companies, small and medium enterprises, and government agencies worldwide. Larscom's headquarters are in Newark, California. Additional information can be found at

Safe Harbor Statement

Any forward-looking statements in this news release are based on our current expectations and beliefs and are subject to known and unknown risks and uncertainties that could cause the actual results to differ materially from those suggested. Factors that could cause actual results to differ materially include (but are not limited to) risks associated with the issuance of a "going concern" auditor's explanatory paragraph and its possible negative effect on our customer base, employees and our ability to acquire additional financing, lower than expected cash flows from operations, customer concentration that include MCI (formerly WorldCom) and Lucent Technologies, the ability to develop successful new products, the ability to hire and maintain key executive positions, dependence on recently introduced new products and products under development, market acceptance of new products, the acquisition of other businesses or technologies, dependence on component availability from key suppliers, rapid technological change and fluctuations in quarterly operating results, as well as additional risk factors as discussed in the "Risk Factors" section of our annual report on Form 10-K and quarterly reports on Form 10-Q filed with the U.S. Securities and Exchange Commission. These forward-looking statements represent our judgment as of the date of this news release. We disclaim, however, any intent or obligation to update these forward-looking statements.

Larscom is a trademark of Larscom, Incorporated. All other trademarks mentioned herein are the property of their respective owners.
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Publication:Business Wire
Geographic Code:1USA
Date:Apr 19, 2004
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