Interphase Showcases the iNAV 4550 Multipurpose Network Processor Module at Embedded Systems Conference Boston.

PLANO, Texas -- Interphase Corporation (Nasdaq:INPH), an international supplier of next-generation networking technologies, invites the public to come see the recently-introduced iNAV(R) 4550 PMC Communications Resource Module, a new modular subsystem approach for executing multiple communications system functions with a single hardware design. The iNAV 4550 will be on display September 14-15 at the Embedded Systems Conference in Boston in the Interphase booth, #1020.

The versatile iNAV 4550 can be used as an advanced communications controller for processing line interface traffic, a compact protocol conversion module for interworking cell-based and packet-based protocols, or a powerful CPU co-processor module for off-loading specialized processing functions such as bridging and routing. All three of these functions are common tasks in high-end telecommunications systems such as wireless gateways, Interworking Functions (IWFs), Serving Gateway Support Nodes (SGSNs), and Gateway GPRS Support Nodes (GGSNs), as well as next generation network media gateways and media gateway controllers.

The iNAV 4550's purpose-built Winpath(TM) 787 Packet Processor, the latest network processor architecture from Wintegra(TM), Inc., offers multimillion packet processing per second, an easy-to-program uni-processor architecture, and pre-developed layer 2 and 3 communications software. Benefits from this design include a huge performance improvement, a decrease in equipment costs, and the corresponding time-to-market improvement resulting from substantially reduced integration cycles and reduced engineering efforts for protocol stack development.

Addressing the carriers' dual-need to satisfy end-user demand for communicating across multiple network mediums while consolidating network infrastructure for cost control, the iNAV 4550 serves as a gateway-on-a-card for bridging multiple packet networks, offering a superior price/performance ratio over existing market alternatives. In addition to network convergence, the iNAV 4550's processing capabilities can be used to efficiently execute other system functions such as IP over Ethernet (IPoE) and IP over ATM (IPoA) packet routing & classification per RFC 2684, ATM cell switching, Ethernet switching, and ATM SARing.

Designed with performance and flexibility in mind, the iNAV 4550 establishes a new benchmark in protocol interworking combining all the benefits of a much more expensive solution with the easy integration of a NIC.

Availability of the iNAV 4550 is planned for Q1 2005.

About Interphase Corporation

Interphase enables rapid platform design and integration for the global voice and data communications markets through custom and off-the-shelf communications equipment, embedded software development suites, and systems integration and consulting services for telecom and enterprise networks. The company's products connect computer and telecommunication servers to Wide Area Networks (WANs), Local Area Networks (LANs) and Storage Area Networks (SANs) using Asynchronous Transfer Mode (ATM), Ethernet, Signaling System 7 (SS7), IP, Fibre Channel, HDLC, Frame Relay, and Integrated Services Digital Network (ISDN) technologies. Headquartered in Plano, Texas with offices across the United States, Paris, Munich, Helsinki, and Sydney, Interphase 2003 revenues were $32.5 million. Clients include Lucent Technologies, Nortel Networks, Ericsson, Hewlett-Packard, Alcatel, IBM, Compaq, Motorola, Fujitsu, Lockheed Martin, and Raytheon. Additional information about Interphase and its products is available through the company's web site at www.interphase.com.

Safe Harbor

This press release contains forward-looking statements with respect to financial results and certain other matters. These statements are made under the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995 and involve a number of risks and uncertainties that could cause actual results to differ materially from those in the forward-looking statements. Such risks and uncertainties include, without limitation, fluctuations in demand, the quality and price of similar or comparable networking products, access to sources of capital, general economic conditions in the company's market areas, and that future sales and growth rates for the industry and the company could be lower than anticipated.

The Interphase logo and iNAV are registered trademarks of Interphase Corporation. All other trademarks are the property of their respective owners.