TOPEX and Its Spanish Partner, Xacom Comunicaciones, Successfully Launch the New Version of Bytton Router Using HSUPA Technology

TOPEX, a leading telecom equipment manufacturer and NGN solution provider, successfully launched its new version of Bytton router with Sierra Wireless embedded modules for HSUPA networks, together with its Spanish partner Xacom Comunicaciones.

Bucharest, Romania, April 25, 2008 --( Sierra Wireless provides embedded modules for TOPEX Fixed-Cellular terminals and GSM Gateways, enabling the company to build highly professional products famous for innovation, quality and reliability.

Through Xacom partnership, TOPEX has the opportunity to distribute its Bytton router in Spanish market and to expand its business relationships and its worldwide distribution network with a proven player having requisite skills and experience in telecommunication services.

Using HSUPA option, the Bytton router enables mobile data uplinks at speeds of up to 1.44 Mbps. In this way, the users of this equipment take the advantage to access the 3G broadband mobile data services at speeds of up to 7.2 Mbps across all 3G network coverage and to enjoy more services and better communication experiences.

The new version of Bytton equipment is an enhanced version for TOPEX Bytton HSDPA router used by Vodafone Romania for its MultiOffice 3G Broadband Service and is an All-In-One device that serves, at the same time, as a terminal simultaneous voice calls and router for Internet access, as a WIFI Access Point, as a VPN Router with powerful Firewall, LAN Server and Video Surveillance Server. The router acts as a voice cost optimizer tool for fixed to mobile calls with Least Cost Routing capability.

HSUPA technology, recently launched by Vodafone across all Romanian 3G network, represents an upgrade version for 3G+ networks (or HSDPA - High Speed Downlink Packet Access) and enables better performance in data transmission helping to strongly promote mobile IP multimedia services in mass markets. With HSUPA, operators can provide more services and applications in a more cost-effective mode, and hence, get a better return from their investments.

"Our collaboration with Xacom Comunicaciones and Sierra Wireless is the affirmation of our corporate value to develop sustained efforts for the partners using innovative services and products.”, said Mr. Constantin Dumitrescu, Sales and Marketing Director TOPEX.

“We are confident and highly appreciative that this successful launch will result in a continuous satisfaction for our clients, due to the secure and innovative equipment provided by TOPEX.”, added Mr. Dumitrescu

TOPEX is among the most innovative, fast growing European manufacturers of telecommunication equipment, providing a wide range of telecommunication applications. The company has over 17 years of experience in research, development and manufacture of both civil and military telecommunication devices.

TOPEX's leveraged expertise includes: Next Generation Network solutions, Softswitch, Media Gateways for TDM, VoIP, GSM and CDMA (2G, 3G), Signaling Gateways (SS7, ISDN, R2, SIP and H323), Broadband Wi-Fi Mobile Routers, Fixed-Mobile Terminals (2G, 3G) and ATC Voice Communication Systems.

About Sierra Wireless
Sierra Wireless (NASDAQ: SWIR – TSX: SW) modems and software connect people and systems to mobile broadband networks around the world. The Company offers a diverse product portfolio addressing enterprise, consumer, original equipment manufacturer, specialized vertical industry, and machine-to-machine markets, and provides professional services to customers requiring expertise in wireless design, integration, and carrier certification.

About Xacom Comunicaciones
Xacom Comunicaciones is the Spanish leader for developing, manufacturing and distributing value added equipment for high mobile communication. Since 1991, the company has assumed the challenge offered by new tehnologies introducing into the Spanish market tehnologies like GSM, GPRS, EDGE, UMTS, HSPA si HSUPA for data, fax and voice transmition.

Doriana Popescu
PR Manager
Phone: +40-21/4083924;
Fax: +40-21/4083909;

Doriana Popescu