Sierra Wireless TRU-Flow™ improves performance across product lines

Sierra Wireless patent-pending technology expanded to EV-DO product line; monitors and adjusts for congestion to ensure the fastest performance possible with or without a VPN
Vancouver (Canada)-March 31, 2009

Sierra Wireless (NASDAQ: SWIR - TSX: SW) today announced the expansion of the company’s patent-pending TRU-Flow™ technology to include Sierra Wireless EV-DO products. First launched in the company’s HSPA product line in 2007 to address the issue of reduced data transfer speed during simultaneous upload and download, TRU-Flow is the only technology in the world to improve web page load times during uplink congestion even with virtual private network (VPN) enabled.

Sierra Wireless TRU-Flow is designed to address the way real users work over their wireless connections. When a wireless network user attempts to upload and download over the wireless network at the same time, congestion can reduce data throughput, slowing down performance. Sierra Wireless TRU-Flow monitors IP traffic and data throughput to optimize the overall upload and download modem performance. When there is uplink congestion, TRU-Flow technology is theoretically capable of nine times increase in download throughput. Field tests show an average 100 percent increase in the download throughput performance and an average 100 percent improvement in web page load times even with a VPN enabled and regardless of the mobile operator network.

“TRU-Flow is a great example of the many behind-the-scenes touches Sierra Wireless adds to its products to improve the customer experience,” said Jim Kirkpatrick, chief technology officer for Sierra Wireless. “We recognize that our customers have many choices in wireless modems today, and we put considerable effort into ensuring that when they choose a Sierra Wireless product, they receive a better experience in terms of performance and reliability than they can get from an alternative.”

Sierra Wireless TRU-Flow will be integrated into upcoming Sierra Wireless EV-DO products, including the AirCard 402 data card, the Sierra Wireless USB 598, and EV-DO embedded modules.

For more information about Sierra Wireless TRU-Flow, including a white paper that provides a more detailed look at the technology, please visit http://www.sierrawireless.com/product/tru-flow.aspx.

To contact the Sierra Wireless Sales Desk, call +1 (604) 232-1488 or e-mail sales@sierrawireless.com.

* Improvements vary based on signal conditions.

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. For more information about Sierra Wireless, visit www.sierrawireless.com.

“TRU-Flow” is a trademark of Sierra Wireless. Other product or service names mentioned herein may be the trademarks of their respective owners.

Forward Looking Statements

This press release contains forward-looking statements that involve risks and uncertainties. These forward-looking statements relate to, among other things, plans and timing for the introduction or enhancement of our services and products, statements about future market conditions, supply conditions, channel and end customer demand conditions, revenues, gross margins, operating expenses, profits, and other expectations, intentions, and plans contained in this press release that are not historical fact. Our expectations regarding future revenues and earnings depend in part upon our ability to successfully develop, manufacture, and supply products that we do not produce today and that meet defined specifications. When used in this press release, the words "plan", "expect", "believe", and similar expressions generally identify forward-looking statements. These statements reflect our current expectations. They are subject to a number of risks and uncertainties, including, but not limited to, changes in technology and changes in the wireless data communications market. In light of the many risks and uncertainties surrounding the wireless data communications market, you should understand that we cannot assure you that the forward-looking statements contained in this press release will be realized.