EtherPHAST-24 Completes TranSwitch Multi-Client Mapper Family; OEMs Ca

    Business Editors/Technology Editors

    SHELTON, Conn.--(BUSINESS WIRE)--April 27, 2005--TranSwitch(R) Corporation (NASDAQ: TXCC), a leading provider of high-speed Broadband, Transport and Switching semiconductor solutions for voice, data and video communications, today announced availability of the EtherPHAST(TM)-24 dual OC-12 mapper-framer, a complementary member of the company's family of EtherMap(R) and EtherPHAST transport devices for Ethernet, SAN, TDM and packet clients. The EtherPHAST-24, which has been designed into a major OEM's platform, targets multi-service applications including full rate GigE and sub-rate SAN requirements in small to large MSPP/ADM/CWDM platforms where redundant OC-12 (622Mbs) mapping bandwidth is optimal, or where a single device supports two OC-12 ring interfaces. This device also has associated price performance advantages over more costly full rate OC-48 solutions.
    EtherPHAST-24 complements TranSwitch's EtherPHAST-48 Plus full rate OC-48 EoS/SAN framer-mapper, and the EtherMap-12 and EtherMap-3 Pt lower rate OC-12 and OC-3 EoS mappers. The intelligent software API driver/firmware set and external interfaces used for the EtherPHAST-24 are identical to the EtherPHAST-48 Plus, allowing customers to leverage their software integration and board design across multiple projects with different bandwidth rates and interface requirements. Like the EtherPHAST-48 Plus, the EtherPHAST-24 features telecom bus expansion port and an internal cross-connect. Thus customers can design highly flexible and scalable system solutions utilizing a combination of EtherPHAST-24 and EtherMap-12 or EtherMap-3 devices to provide a rich mix of high order and low order mapping, cross connection and grooming for VCAT/LCAS applications.
    "Equipment manufacturers can now implement appropriately dimensioned, cost-effective transport devices rather than force fit an oversized device that carries a penalty in terms of higher cost, power, interfaces and more bandwidth than is necessary," said Rob Schwaber, product marketing manager for TranSwitch. "With the EtherPHAST-24, for example, they can satisfy transport requirements today and migrate seamlessly to the OC-48 solution tomorrow, safeguarding their investments and resources.
    "This makes sense," continued Schwaber, "considering the large number of pizza box/Micro MSPP designs being built for the broadband Customer Edge that efficiently share board designs in a product family with larger systems serving the Provider Edge networks."
    The EtherPHAST-24 provides extremely low latency mapping of multiple protocols over SONET. It has an "ANY-Mapper" capability utilizing four available terminal interfaces for 1) line side SONET/SDH or backplanes, 2) telecom bus for expansion, aggregation or protection, 3) SerDes-based interface for high speed GigE, and 4) lower speed interfaces for fast Ethernet, sub-rate FC, ESCON, packet or DVB-ASI. All four terminals may be configured for any port to any port data path grooming providing unprecedented flexibility for a wide array of applications. These interface combinations can then take advantage of many encapsulation and cross-connect capabilities internal to the device, including GFP framed and transparent mode, PPP/BCP, HDLC, transparent HDLC and LAPS. LCAS is supported in the device, as well as standard and arbitrary pointer-based non-standard contiguous and virtual concatenations (VCAT) for SONET/SDH, which allow a rich set of transport options.
    EtherPHAST-24 contains substantial on chip buffering for ingress/egress packets leading to lower costs, optimal performance and reduced latency for oversubscribed Ethernet flow control and packet backpressure applications. Multiplexed dual Multi-protocol Packet Interfaces (MPI) provide VCAT/LCAS and/or GFP direct mapping access (for example, ATM over VCAT/LCAS). EtherPHAST-24 is packaged in an 844-pin Super Flip Chip Ball Grid Array (SFCBGA). Its design is based on .13 micron technology.
    The EtherPHAST-24 device is part of the field proven EtherMap(R) and EtherPHAST(R) product families. Key benefits include multi-port/multi-rate standards compliance, multi-encapsulation capability, and a high degree of bandwidth granularity, resulting in reduced platform cost, faster Time-To-Market (TTM), and greater revenue generation for OEMs and Service Providers.

    About TranSwitch

    TranSwitch Corporation designs, develops and markets innovative semiconductors that provide core functionality and complete solutions for voice, data and video communications network equipment. As a leading supplier to telecom, datacom, cable television and wireless markets, TranSwitch customers include the major OEMs that serve the worldwide public network, the Internet, and corporate Wide Area Networks (WANs). TranSwitch devices for Broadband, Transport and Switching are inherently flexible, many incorporating embedded programmable microcontrollers to rapidly meet customers' new requirements or evolving network standards by modifying a function via software instruction. TranSwitch implements global communications standards in its VLSI solutions and is committed to providing high-quality products and services. TranSwitch, Shelton, CT, is an ISO 9001:2000 registered company. For more information, visit www.transwitch.com.

    Forward-looking statements in this release, including statements regarding management's expectations for future financial results and the markets for TranSwitch's products, are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that these 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 and EtherMap are registered trademarks of TranSwitch Corporation. EtherPHAST is a trademark of TranSwitch Corporation.

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CONTACT: TranSwitch Corporation, Shelton Joyce Clark, 203-929-8810 X2609 joyce.clark@transwitch.com

KEYWORD: CONNECTICUT INDUSTRY KEYWORD: TELECOMMUNICATIONS INTERNET E-COMMERCE PRODUCT SOURCE: TranSwitch Corporation

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