MNW March Networks

    Leading Retailer Selects March Networks Professional Retail Services to    
                        Optimize Business Intelligence                         

OTTAWA, ONTARIO, April 20, 2007 -- March Networks(tm) (TSX:MN; AIM:MNW), a leading
provider of IP-based video surveillance solutions, announced today that one of
the largest retailers in the United States has selected March Networks
Professional Retail Services for approximately 1,200 of its stores.

The consulting and software maintenance services will enable the retailer to
extract maximum value from March Networks business intelligence software
already in use in the stores to reduce shrink, decrease in-store risk and
improve overall store performance.

The services include implementation management, shrink assessment, store
audits, and transaction profiling customization. They also include upgrading
the web-based data mining software to ensure that the retailer benefits from
the newest application features and capabilities.

Progressive retailers use March Networks advanced video management and data
analysis solutions to combat inventory shrinkage, which costs retailers $37
billion annually in the U.S. alone. Video surveillance and Point-of-Sale (POS)
transaction data monitoring are the two most widely used shrink management
technologies, according to a 2006 security and loss prevention study.

"Businesses today require comprehensive visual and business intelligence
solutions that go well beyond high performance technology," said Peter Strom,
President and CEO of March Networks. "This is further proof that our unique
ability to deliver a complete loss prevention solution through the combination
of innovative software and professional services continues to lead the
industry."

About March Networks

March Networks(tm) (TSX:MN; AIM:MNW) is a leading provider of innovative video and
data applications used for security surveillance, monitoring, analysis and
business optimization. The company's software and IP-based hardware solutions
allow businesses to increase operational efficiencies, address risk, and manage
assets with an integrated set of video-based intelligence tools and business
intelligence applications. The ISO 9001:2000 certified company serves the needs
of leading financial institutions, retailers, transportation authorities,
commercial/industrial organizations and government/homeland security agencies
in approximately 50 countries throughout the world. For more information,
please visit www.marchnetworks.com.

Forward-Looking Statements

This release contains certain forward-looking information, including
expectations of future business. This information is based on the company's
current expectations and assumptions that are subject to a variety of risks and
uncertainties that are difficult to predict and that may be beyond March
Networks' control. Actual results could differ materially from those expressed
in any forward-looking statements due to factors such as customer demand and
timing of purchasing decisions, increased levels of competition, technological
changes and the successful development of new products, dependence on
third-party manufacturers, risks relating to intellectual property infringement
claims, and other risks and factors identified in March Networks' public
filings with regulatory authorities in Canada. March Networks assumes no
obligation to update these forward-looking statements as a result of new
information or future events.

*MARCH NETWORKS and the MARCH NETWORKS logo are trademarks of March Networks
Corporation. All other trademarks are the property of their respective owners.

FOR FURTHER INFORMATION, PLEASE CONTACT:

Peter Wilenius, March Networks Corporation

613-591-8181

email: pwilenius@marchnetworks.com



END

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