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Press Release

Ceterus Networks' Continued Technical Leadership Advances ITU's Circuit Bonding Standards

Allen, TX, March 13, 2006

Ceterus Networks, a leading supplier of flexible, next generation transport solutions, announced that the International Telecommunications Union (ITU) ratified two critical recommendations, co-authored by Ceterus, that advance the existing circuit bonding standards. Building on the VCAT, GFP and LCAS standards for PDH networks, which were ratified in late 2004, these important new recommendations (TD484/485) provide the framework for how the carriers will manage the services offered over a bonded group of circuits.

The existing circuit bonding standards, G.7042/7043/8040, create a method for carriers to aggregate multiple T1, E1 or DS3 circuits into a single virtual bandwidth pool. Together they create the most efficient way for carriers to Ethernet-enable their extensive legacy access networks.

"The ITU is recognized worldwide as the premier body for developing standards for established carriers," said Bill Szeto, Chief Technology Officer of Ceterus Networks. "At the February meeting in Geneva, a large and diverse group of carriers and equipment suppliers advanced the circuit bonding standards by establishing management methods for the concatenated circuits in the bonded group. This will greatly simplify service provider operations, provisioning and troubleshooting."

Millions of T1 and E1 circuits are in use around the world. Carriers realize the tremendous benefit of efficiently using today's network infrastructure to deliver both new packet-based services such as Ethernet and VoIP, as well as legacy TDM services.

"Carriers are using the cost, operational and speed-to-market advantages offered through the Ceterus product line to realize fast return on investment, while ensuring a smooth transition for their customers," said Dave Stehlin, President and CEO of Ceterus Networks. "We have a large and growing number of top tier carriers deploying our products in their most important enterprise, government and backhaul applications. Delivery of mission critical enterprise data services, backhaul of Ethernet from cell towers and overall network access cost reduction are some of the most important issues carriers face, and the Ceterus equipment is proving to be a great solution."

About Ceterus Networks
Ceterus Networks provides flexible transport solutions that enable Ethernet as well as legacy service delivery to any location, over copper or fiber. By transforming existing wireline and wireless networks to carry flexible packet-based Ethernet as well as TDM services, Ceterus products enable service providers and enterprises to deliver these high-bandwidth, high-QoS managed services to every location, using existing OAM&P procedures, while minimizing access cost and capital expense. Ceterus Networks is a privately-held company headquartered in Allen, Texas. For more information, visit the company's web site at www.ceterus.com.

Contacts:

Tony Katsulos
Jetstream PR for Ceterus Networks
972.788.9456, ext. 301
katsulos@jetstreampr.com

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