Canadian Carrier Increases Competitiveness and Delivers Differentiated Offerings with Navitas IP-application Routing Directory

Redwood City, Calif., – January 15, 2008 — Nominum, the leading provider of network naming and addressing technologies, announced today that TELUS selected Nominum’s carrier-grade IP-application Routing Directory (IPRD) Navitas as the foundation for growing its wholesale interconnect and peering business as it accelerates the move from the traditional TDM network to IP. Nominum Navitas enables TELUS to optimize its call and session routes while creating new differentiated wholesale service offerings, resulting in reduced interconnect costs, simplified operations and new sources of revenues.

With more than 10 million subscribers and a carrier-class IP network that spans the country, TELUS Corporation is the second-largest carrier in Canada and provides a wide range of wireline and wireless communications products and services including data, Internet Protocol (IP), voice, video and entertainment services.  With the move to IP-based call routing, TELUS experienced significant growth in its wholesale interconnect business for domestic, North American and international voice traffic. TELUS needed to leverage its existing investment in routing optimization analytics to execute dynamic call routing optimization in the IP network.  Because fast and accurate application of the most up-to-date business rules directly impacts profitability, the carrier needed the ability to quickly refresh this information throughout the IP network – moving towards real-time cross-network availability of interconnect routes.

“To improve our offering and control operating costs, we needed a solution that enriched our network with route and numbering plan management, enforced optimal routing policies consistently, and had the scalability to handle current traffic and anticipated growth,” said    Brent Allison, VP Partner Solutions Marketing for TELUS.  “Navitas is an essential part of our next-generation network and is a key element of our strategy of providing differentiated services at competitive prices. More importantly, Navitas is the foundation block of a network that will allow TELUS to be a key player in the converged communication world ahead.”

“The wholesale market is highly competitive, and carriers are under continued pressure to evolve their offerings while keeping costs under control,” said Tom Tovar, chief executive officer of Nominum. “We are delighted that TELUS selected Navitas to help improve its economical model for VoIP peering and interconnects.”

Nominum Navitas is an IP-application Routing Directory (IPRD), a switch-agnostic signaling data repository that consolidates telephony numbering and routing information, and refines routes based on session parameters like cost, quality, capacity, and context.  TELUS applied Navitas as an IP-based network control point and relies on the following capabilities for improving their business:

·         Eliminating data fragmentation across switching element routing tables through consolidation of numbering and routing plans across IP and TDM networks.

·         Signaling capabilities with SIP and ENUM queries.

·         Support for parameter-based routing including Least Cost Routing for profitable and reliable routes.

The integration enabled TELUS to access optimal routes in its network in real-time and make use of in-session route optimization, thereby maximizing margins and preserving a high quality service.

About Nominum

Nominum's network naming and addressing solutions power the world's largest always-on networks. Nominum is a global provider of ENUM-based IP-Application Routing Directory, DNS and DHCP solutions that enable communication providers to deliver high quality always-on broadband internet and innovative services to their customers, including VoIP, push to talk, fixed-mobile convergence, IPTV and triple-play. For further information, visit www.nominum.com.

About TELUS

TELUS (TSX: T, T.A; NYSE: TU) is a leading national telecommunications company in Canada, with $9.0 billion of annual revenue and 11.0 million customer connections including 5.4 million wireless subscribers, 4.4 million wireline network access lines and 1.2 million Internet subscribers. TELUS provides a wide range of communications products and services including data, Internet protocol (IP), voice, entertainment and video. Committed to being Canada’s premier corporate citizen, we give where we live. Since 2000, TELUS and our team members have contributed more than $91 million to charitable and non-profit organizations and volunteered more than 1.7 million hours of service to local communities. Eight TELUS Community Boards across Canada lead our local philanthropic initiatives. For more information about TELUS, please visit telus.com.