Airvana to showcase VoIP, Push-to-talk and IP QoS EV-DO services

September 27, 2004

Airvana, a provider of All-IP, 3G CDMA2000 1xEV-DO infrastructure, will demonstrate live Broadband Internet access, VoIP, Push-to-talk and IP QoS over 1xEV-DO during the 2004 CDMA Americas Congress in Miami, September 28-30, 2004. Airvana will also provide attendees the opportunity to experience VoIP and Broadband Internet access over 1xEV-DO first hand at Airvana's Internet Cafe.

These demonstrations will highlight the benefits of Airvana's 100% IP-Enabled infrastructure in delivering high-speed wireless data services to mobile professionals, VoIP subscribers, residential broadband users and consumers of multimedia information and entertainment.

-- Push-to-Talk - Airvana will display the performance of Push-to-Talk when offered over a 1xEV-DO network. From exceptionally fast call setup times (around 1 second) to reduced latency and higher capacity, the use of 1xEV-DO for PTT services offers significant efficiency improvement over 1xRTT.

-- VoIP - Airvana's All-IP 1xEV-DO infrastructure provides an optimal solution for the delivery of VoIP. Broadband data rates, QoS mechanisms, and native support for IP facilitate the transport of packet voice without degradation of voice quality.

-- QoS - Airvana's QoS mechanisms give network priority to subscriber traffic flows based on the operator-assigned service level. With the ability to differentiate services in this way, carriers may offer tiered, high-margin services to premium level customers. Such services include video conferencing, multimedia downloads, VoIP and Push-to-Talk.