The converter remains installed, managed and fully
operational at any of these speeds."
Different fiber types, wavelengths or copper interfaces can now be
connected using this Line Converter. offers networking connectivity solutions that
make the conversion between disparate media types possible . The company
designs and markets these media conversion technologies across a broad
spectrum of networking protocols including Ethernet, Fast Ethernet, Gigabit
Ethernet, T1/E1, DS3, and more . Headquartered in Plano, Texas with sales offices
across the globe, Interphase 2004 revenues were $35 million.com

Safe Harbor

This press release contains forward-looking statements with
respect to financial results and certain other matters.
Target applications for the SlotOptimizer 364G include both
telecom and general-purpose computing environments. All other
trademarks are the property of their respective owners.

broadly whatis

The converter is vendor agnostic and it accepts all standard SFP modules. 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.

Interphase and the Interphase logo are registered trademarks and
SlotOptimizer is a trademark of Interphase Corporation.

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transition .4 percent customer acceptance rating, meaning
that approximately one in 1,000 experience failure in the field. Telecom Equipment
Manufacturers are currently developing first-generation ATCA platforms
using PMC modules from Interphase Corporation.16 CPSB, to newer
technologies like AdvancedTCA and MicroTCA. All other trademarks are the property of
their respective owners. Future product
options include a half-height face plate, fiber interfaces, and driver
support for VxWorks(R).interphase .

ethernet broadly

Please contact
Transition Networks at (800) 526-9267 or http://www. Clients
include Hewlett -Packard, Ericsson, Motorola, Inc.

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Product Availability The converter is available now. Many early
generation ATCA processor blades have few or no native faceplate
Ethernet ports, making the SlotOptimizer 364G product an excellent
solution for those applications requiring direct Ethernet port
connectivity to the processor blade.

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When used with an SX and LX module the
unit can be used as a mode converter . 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.
"Interphase developed the 364G AMC Quad-Port Gigabit Ethernet
Adapter as our first AdvancedMC mezzanine module to bring to the
market due to the growing use of Ethernet technologies in carrier
infrastructures," said Greg Kalush, President and Chief Executive
Officer of Interphase Corporation., Lucent Technologies, Lockheed Martin, and
Raytheon.

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The company works alongside leading
networking vendors -- Nortel Networks, Hewlett Packard, 3COM, Cisco,
Enterasys, Extreme, Foundry, Avaya and others -- to provide conversion
technology solutions that offer the necessary adaptations without affecting
the performance, nature or appearance of the network to the users or the
network devices.

Business Editors/Technology Writers

PLANO, Texas----

Standards-based AdvancedTCA (ATCA) Modules Purpose-Built for
Converging Next-Generation PSTNs, Wireless and Edge Networks

Interphase Corporation (Nasdaq:INPH ), an international supplier of
next-generation networking technologies, today announced details
regarding its portfolio of AdvancedMC(TM) building blocks targeted for
use in next-generation PSTNs, wireless and edge networks based on
emerging PICMG(R) 3. "Interphase's product strategy serves to "future proof"
our customers' investment by supporting a smooth migration from
today's technologies such as CompactPCI and PICMG 2.

Ethernet is used mostly in local area networks (LANs) and wide area networks (WANs) using CSMA/CD access method and is the most popular cabling technology.

10base lans

Transition Networks Offers Optical Line Converters

Protocol independence
allows for use in broad range of applications including Fast Ethernet and
Gigabit Ethernet, FDDI, ESCON, SONET OC-3, OC-12, OC-48 and Fibre Channel .
Interphase ensures a comprehensive AdvancedMC product portfolio by
offering a flexible carrier card supporting up to six Advanced
Mezzanine Cards.
ATCA lays the framework for a new generation of communications
infrastructure that will offer a dramatic performance improvement over
the systems available today. 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.

Business Editors/Technology Writers/Tradeshow Writers
CTIA Wireless 2005

PLANO, Texas----Interphase(R)
Corporation (Nasdaq:INPH), an international supplier of
next-generation networking technologies, today released details of the
company's first product in a new line of AdvancedMC mezzanine modules
for Advanced Telecom Computing Architecture (AdvancedTCA) platforms.

lwl layers

, today announced the introduction of a new Optical Line Converter.
The converter offers protocol independent connectivity between fiber optical
or copper links with an added flexibility of Small Form Factor Pluggable (SFP)
technology.com for the
latest information.16 platforms. Targeted for next-generation carrier
grade communications equipment , the ATCA series of specifications
incorporate the latest trends in high speed interconnect technologies ,
next generation processors, and improved reliability, manageability
and serviceability."

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.

Interphase, iNAV and the Interphase logo are registered trademarks
of Interphase Corporation., Fujitsu Ltd.

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Fast
Ethernet optical conversion with an easy upgrade path to Gigabit is very
appealing to our customers," said Bill Schultz VP of marketing . Optical power and link budgets can also be
measured thanks to an optional Digital diagnostics capability .
"Our portfolio of AdvancedMC mezzanines is designed to work in
both AdvancedTCA and MicroTCA platforms, offering greater flexibility
in platform selection for the most demanding carrier and enterprise
applications," said Greg Kalush, President and CEO of Interphase
Corporation.1 specification . "We expect this product to be one
of the most commonly needed interface varieties for the specific
applications we are targeting in the marketplace with our ATCA
products. Headquartered in Plano , Texas with sales offices
across the globe, Interphase 2004 revenues were $35 million.

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Two SFP module slots allow for seamless connectivity between different
wavelengths or fiber modes for speeds up to 2Gbps.
Standalone STSFP4040-100 and The Point System(TM) chassis card CTSFP4040-100
to fit any CPSMCxxxx chassis cabinets. Transition
Networks is a wholly owned subsidiary of Communications Systems, Inc. Designed for use
in applications requiring multiple high-performance Ethernet ports ,
such as media gateways, media servers, softswitches, signaling
gateways, Gateway GPRS Support Nodes (GGSNs), Radio Network
Controllers (RNCs), and Base Station Controllers (BSCs), the
SlotOptimizer 364G is PICMG AMC.1 compliant and provides four ports of
Gigabit Ethernet front access for ATCA processor blades.

largely layers

,
Nortel Networks Ltd.

speeds 802

techfest 10base

If used with a 1000Base-T SFP and a
1000Base-SX or LX SFP the unit can make a copper to fiber conversion.
Product features include Two SFP Slots for SFP interfaces.
Pre-configured bundles with multimode and single mode SFP modules
installed are also available. They have a 99. Additional product details and delivery timeframes
will be announced in the coming weeks.
The Interphase SlotOptimizer 364G AMC Quad-Port Gigabit Ethernet
Adapter is a single-width, full-height AMC with four front access
copper 10/100/1000 Ethernet interfaces , and PCI Express x4 or x8 links
to ATCA per the AMC. 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 .

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"These converters offer an excellent upgrade path for the networks," said
Bill Schultz, vice president of marketing for Transition Networks. Interphase ATCA products are designed to target
those application segments with the greatest level of forecasted
demand for ATCA, including converging next-generation PSTNs, wireless
and edge networks.

10baset layers

Interphase Announces Portfolio of AdvancedMC Mezzanine Cards for AdvancedTCA Telecommunications Networking Platforms

, Lucent Technologies, Lockheed Martin , and
Raytheon.

broadly lwl

Product Configuration
Transition's Optical Line Converters are available in two versions.

About Transition Networks Products
Transition Networks' conversion products are known for their ruggedness
and reliability. Additional information about Interphase and its products is
available through the company's web site at www.

from March 14-16 . Drivers are available for
Linux(R) for both Intel(R) and PowerPC(TM) hosts.

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.

spurgeon commonly

"Today's
Fast Ethernet applications can be upgraded to Gigabit speeds tomorrow with a
simple SFP swap. Link Pass Through
offers a link failure notification capability.

broadly 10baset

"Convenience and flexibility are the big benefits of this new product. 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.com

Safe Harbor

This press release contains forward-looking statements with
respect to financial results and certain other matters.

lans wans

MINNEAPOLIS, Transition Networks Inc.

Transition Networks Inc.X AdvancedTCA (ATCA) and microTCA standards.
Interphase will enable its early-adopter customers to leverage their
previous development efforts on next-generation ATCA platforms,
thereby saving them time and costs for additional system integration
efforts.

interphase.

Interphase SlotOptimizer 364G Quad-Port Gigabit Ethernet AdvancedMC Mezzanine Module Unveiled at CTIA Wireless 2005 Conference; Product on Display in the PICMG

Clients
include Hewlett-Packard , Ericsson, Motorola, Inc. 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.

layer broadly

Users can also control the
device using an SNMP Management via Free of charge GUI Interface, WEB Browser ,
telnet or Command Line Interface. Based in Minneapolis, Transition Networks distributes
hardware -based connectivity solutions exclusively through a network of
resellers in 50 countries, including Ingram Micro and Tech Data.

Statements regarding the Company's anticipated performance in 2005 are
forward-looking and involve risks and uncertainties, including but not limited
to: competitive products and other factors discussed from time to time in the
Company's filings with the Securities and Exchange Commission.
The AdvancedMC product line includes a quad port Gigabit Ethernet
adapter , a family of OC3/STM-1 multi-port Network Interface Cards, a
T1/E1/J1 Communications Controller, a dual port Gigabit flow-through
security processor, and a Gigabit Ethernet Network Processor Card . Customers who are early
adopters of ATCA will experience the benefits of working with
Interphase as they migrate from communications platforms based on
Interphase PMC mezzanine modules to the company 's AdvancedMC modules., Fujitsu Ltd."
General availability of the Interphase 364G AMC Quad-Port Gigabit
Ethernet Adapter is planned for early Q4 of this year.

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, the
conversion technology expert, a wholly owned subsidiary of Communication
Supply Inc.

csma lwl

,
Nortel Networks Ltd.
The new Interphase SlotOptimizer 364G AMC Quad-Port Gigabit Ethernet
Adapter is targeted for use in converging next-generation PSTN
networks and wireless applications.

802 10baset

STSFP4040-100 is a universal platform to accommodate any optical
and electrical conversion protocol options available via SFP interfaces. All
Transition products carry a lifetime warranty.

About Transition Networks Inc.
This broad portfolio of mezzanine building blocks confirms
Interphase's strategic commitment to support emerging platforms based
on PICMG(R) 3. This
commitment is built on a legacy of Interphase providing Telecom
Equipment Manufacturers (TEMs) with standards-based PMC mezzanine
modules and blades for CompactPCI(R) 2.

wans techfest

, a
publicly traded company (Amex: JCS).X AdvancedTCA(R)(ATCA) and MicroTCA platforms. Interphase Corporation's key
development partner, Continuous Computing(R) Corporation will have the
Interphase 364G Quad-port Gigabit Ethernet AdvancedMC product on
display in the PICMG Pavilion, Booth #657, at the CTIA Wireless 2005
Conference in New Orleans, La. Additional information about Interphase and its products is
available through the company's web site at www.