AeroMobile™ Chooses Picocell from ip.accessTM for New Inflight Mobile Phone Service

April 5, 2005

Annapolis, Maryland, USA and Oslo, Norway—The first mobile phone service for passengers on commercial airlines will use miniature cellular technology developed just for inflight operation. Representatives of ARINC Incorporated and Telenor today announced leading U.K. technology firm ip.accessTM has designed the world’s smallest GSM picocell base station for use in their AeroMobile™ inflight phone service, planned for operation later this year.

The new picocell, combined with a unique AeroMobile antenna, will provide full cabin coverage for passengers to use their personal GSM handsets. The AeroMobile antenna architecture allows increasing functionality and capacity by adding picocells in the future.

“By building on our proven nanoBTSTM technology, AeroMobile has assured its airline customers of complete system flexibility well into the future,” stated Mark Pittick, ip.access Vice President, Sales and Marketing. “nanoBTS meets industry standards for use with GSM handsets, GPRS data, and IP and circuit-switched networks.”

“We selected ip.access as our in-cabin cell provider because their nanoBTS offers the most compact, advanced design, and has been proven in the market,” said Graham Lake, ARINC Vice President, Europe, Middle East, and Africa. “ip.access is the leading provider of GSM picocells worldwide, to operators including T-Mobile in North America, Smart in the Philippines, and Eurotel in the Czech Republic.”

AeroMobile in-flight GSM phone service can be controlled at all times both from the ground and by flight personnel via a control panel. The nanoBTS technology combined with the unique antenna system assures passenger handsets will operate at minimum power, eliminating the possibility of interference with aircraft systems.

ip.access, Ltd designs and manufactures a range of GSM and GPRS infrastructure solutions for IP-based networks, enabling ubiquitous and cost-effective mobile radio coverage. ip.access products can be used to enhance public mobile networks and to support emerging enterprise-focused wireless office services. Based in Cambridge, UK, ip.access Ltd is a wholly-owned subsidiary of TTP Communications plc (LSE: TTC), a world-leading independent supplier of cellular handset technology. For more information visit the company’s web site at www.ipaccess.com.

Headquartered in Oslo, Norway, Telenor is an international provider of high quality telecommunications, data and media communication services. Telenor is one of Norway’s largest companies with 2004 revenues of approx NOK 61.3 billion (approximately US $9.1 billion) and a workforce of 20,900 located in Norway and abroad. Telenor is listed on the Oslo Stock Exchange (TEL) and NASDAQ in New York (TELN). For more information, visit the Telenor web site at www.telenor.com.

ARINC Incorporated is the world leader in transportation communications and systems engineering. The company develops and operates communications and information processing systems and provides systems engineering and integration solutions to five key industries: airports, aviation, defense, government, and surface transportation. Founded to provide reliable and efficient radio communications for the airlines, ARINC is headquartered in Annapolis, Maryland, and operates key regional offices in London and Singapore, with over 3,000 employees worldwide. ARINC is ISO 9001:2000 Certified. www.arinc.com