Aruba rejected criticisms that its version of centrally-managed wireless LAN does not allow for scalable voice over WiFi (VoFi). Aruba vice president Keerti Melkote admitted that the company’s systems, due to central application of encryption, command wireless traffic flows to go through the central controller. But this is not a problem “from bandwidth point of view.” Aruba, he claimed, boasts abundant scalability, with controllers having the ability to scale 7.5 Gbit/s of WiFi systems that come on-stream. The company, Melkote added, also has “a roadmap to 40 Gbit/s.”
Melkote believes more services will turn to Aruba to enable switched calls by 2007. Aruba’s switches can decide when to move the connection from WiFi to a switched network, if phones go out of wireless coverage. Aruba product director for voice Peter Thornycroft said that, with this capacity for convergence, the company is serving telco’s UMA specification, which will remain the primary technology until full SIP/IMS implementations for convergence become available.
The company also plans to roll out version 1.0 of the client behavior specification for dual-mode handsets to ensure quality of service, performance, and battery life, as well as their compatibility with other vendors’ equipment. Melkote believes the arrival of dual-mode phones will spur VoFi uptake but “they are still built against the model of an isolated AP, not an office network.”