TranSwitch Introduces Diplomat-A and Diplomat-E Devices for Efficient ATM-to-Ethernet Interworking and Ethernet-Based Packet Processing for IP-Centric Applications.

SHELTON, Conn. -- Programmable Architecture and Bundled Software Offer Future-Proof Solution to OEMs

TranSwitch(R) Corporation (NASDAQ: TXCC), a leading provider of high-speed Broadband, Switching, and Transport semiconductor solutions for voice, data and video communications, today announced Diplomat(TM)-A, a single-chip ATM-to-Ethernet interworking processor and traffic manager, and Diplomat(TM)-E, an Ethernet-based switch processor and traffic manager for Ethernet in the last mile and access applications. The new devices allow efficient connectivity to ATM physical layer framers and Ethernet PHYs providing a comprehensive packet processing and traffic management solution for converging network applications of voice, video, and data.

The Diplomat-A and Diplomat-E are an excellent fit in wireline and wireless platforms such as IP DSLAM, next-generation digital loop carrier (NG-DLC), APON/BPON/EPON optical line terminal/optical network terminal (OLT/ONT), 3G radio network controller (RNC) or Base Station Controller (BSC), and wireless backhaul RNC/BSC applications. TranSwitch provides complete firmware and evaluation kits with the devices accelerating customers' time-to-revenue.

The devices incorporate TranSwitch's high performance eNPU(TM) (embedded Network Processing Unit) technology for packet processing and switching, which is centered around an array of RISC processors with hardware accelerators for specific functions. In conjunction with the embedded firmware, the eNPU engine performs filtering, classification, header manipulation, forwarding, security features and maintenance of statistics. Easy to program, the eNPU engine ensures adaptability to evolutionary changes in industry standards and supports value-added customization. Additionally, TranSwitch provides a comprehensive device driver to control all aspects of operation including initialization, configuration, fault management, performance monitoring, debug and diagnostics. The device driver conforms to NPF (Network Processing Forum) guidelines, which significantly simplifies customers' software efforts.

"With triple-play services requiring more bandwidth, carriers are upgrading the access speeds of their DSL networks," said Daryl Inniss, program director for the Communications Component programs at RHK. "This has resulted in carriers adopting ADSL2+ with improved data rates over longer loop lengths in their DSLAMs. VDSL2 will follow for high-speed links over short loop lengths, once it becomes available later this year. The TranSwitch devices are designed for platforms requiring ATM to Ethernet interworking and also for end-to-end Ethernet/IP applications."

"With these devices, TranSwitch is providing its customers with pre-integrated, embedded, feature-rich eNPU firmware which will result in a faster Time-To-Market," said Johnny Leung, director of Product Line Management for TranSwitch. "Developed with input from several Tier 1 OEMs, the eNPU technology is a key differentiator for TranSwitch."

In addition to the eNPU packet processing engine, Diplomat-A includes AAL5 SAR (Segmentation and Reassembly) and an integrated traffic manager providing Class of Service (CoS) based queuing, scheduling, and congestion control using cost effective DDR SDRAM. The multi-mode Priority Deficit Round Robin (PDRR) scheduler offers configurable weights between the traffic queues for efficient service differentiation. Complementing the packet scheduler is a novel high performance multicast engine offering wire-rate performance for IPTV applications. The optimal partitioning between firmware and hardware enables throughput of up to 2,000 Mbps yet provides flexibility to adapt to evolving standards and value-add customizations. Diplomat-A features a UTOPIA Level-2 interface on the subscriber side and two 10/100/1,000 Ethernet ports on the uplink side. Diplomat-A comes bundled with TranSwitch's royalty-free "AERIS" firmware (ATM-to-Ethernet Interworking Software) which features standards-compliant PPPoEoA interworking and OAM/AAL0/AAL2 tunneling.

Diplomat-E offers the same packet processing and traffic management functions as Diplomat-A, but is Ethernet-centric. Diplomat-E contains 24 Fast Ethernet (FE) subscriber interfaces and two 10/100/1,000 Ethernet ports on the uplink side. It comes bundled with TranSwitch's royalty-free "EASEL" firmware (Ethernet Access and Switching in the Last mile) which features standards-compliant PPPoE bridging and Ethernet OAM.

Customers can obtain samples of Diplomat-A (TXC-06875) and Diplomat-E (TXC- 06877) in Q3 of 2005. The devices are packaged in a 676 Pin Ball Grid Array (PBGA). Pricing is available upon request.

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 is a registered trademark of TranSwitch Corporation. Diplomat and eNPU are trademarks of TranSwitch Corporation.