RAD and TranSwitch Demonstrate Interoperability of TDMoIP-Based T1 Voice over Ethernet Provisioned UNI Service

22 June 2004: At SUPERDemo, which is now being held under the auspices of the Metro Ethernet Forum (MEF) at Supercomm 2004 in Chicago, RAD Data Communications has joined forces with TranSwitch Corporation in demonstrating circuit emulation system (CES) interoperability using TDMoIP® technology over an MEF-compliant Ethernet UNI service.

The demonstration teams RAD’s IPmux-16 TDMoIP gateway with TranSwitch’s PacketTrunk-4 internetworking gateway. The demo focuses on transporting voice and T1 TDM traffic over an Ethernet UNI network, powered by TranSwitch’s scaleable Envoy family of carrier grade Ethernet controllers and aggregators, and feature advanced traffic management capabilities. These include voice prioritisation, service provisioning and the efficient and fair handling of bursty data traffic.

“The TDMoIP devices used in the demo incorporate structure-aware emulation using AAL1-based encapsulation, as per the MEF’s emerging Implementation Agreement for PDH Emulation Service,” says Jacky Acoca, Business Development Manager at RAD Data Communications. “By demonstrating interoperability of TDMoIP technology for CES over metro Ethernet networks at SUPERDemo, RAD and TranSwitch are underscoring their firm commitment to jointly supporting the MEF’s standardisation efforts, which dovetail with complementary activities at the ITU-T, IETF PWE3 and ATM Forum,” Acoca adds.

At SUPERDemo, RAD is also conducting a separate demonstration of T1 and LAN service over E-line services. An IPmux-11 Ethernet multiservice gateway, designed for deployment at the customer premises, is being used to transport both VLAN and CES traffic over an E-Line cloud to a carrier-class Gmux-2000, a product designed for deployment at points-of-presence (POPs) and central offices. The E-Line cloud is based on equipment manufactured by other members in the MEF SUPERDemo. By assigning different VLAN tags to voice and data, the IPmux-11 illustrates how economical T1 services can be added to metropolitan Ethernet networks using a one-box solution at the customer premises.

At SUPERDemo, TranSwitch is also showcasing its carrier-grade Ethernet technology found on the Envoy line of products to provide profitable triple-play services in the last-mile for Ethernet Aggregation Boxes, IP DSLAMs, CMTS and VPLS enabled Ethernet over SONET/SDH MSPP equipment. The demonstration, in conjunction with other members in the MEF SUPERDemo, showcases the ability to manage and enforce SLAs remotely over an Ethernet provisioned UNI, in addition to the comprehensive hardware and software support provided by TranSwitch with the product family to enable system vendors to rapidly accelerate their development times while significantly reducing their R&D expenses.

Developed by RAD and introduced to the market in 1999, RAD’s patented TDMoIP technology transparently transports circuit switched traffic, including signaling, over the packet switched network. The IPmux-16 featured in the demo is a NEBS-compliant TDMoIP gateway with T1/E1 and T3/E3 and Ethernet user interfaces and an Ethernet network interface.

PacketTrunk-4 is the first TDMoIP device introduced as a result of a strategic partnership between TranSwitch and RAD. The device is targeted to internetworking gateway applications, allowing efficient transport of TDM trunks over PSNs using TDMoIP. It is a single chip solution that incorporates robust clock recovery, encapsulation, jitter compensation, Layer 2/3/4 QoS support, and standards-based support for transport of structured and unstructured TDM signals over a PSN. PacketTrunk-4 serves as a building block for TDMoIP, TDMoMPLS or TDM-over-switched Ethernet networks.

TranSwitch Corporation, headquartered in Shelton, Connecticut, is a leading developer and global supplier of innovative high-speed VLSI semiconductor solutions - Connectivity Engines™ - 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: 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.