VOIP Over EV-DO Rev. A Put To Test

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posted Jun 8, 2006, 1:32 PM

Qualcomm yesterday announced it had successfully tested making calling using Voice over IP (VOIP) on a CDMA EV-DO Revision A network. The tests involved 62 simultaneous calls in a single 1.25 MHz channel using SIP-based voice clients. SIP is a common VOIP protocol used by many internet phones including those running Gizmo Project. Qualcomm and CDMA operators are looking to VOIP because when a channel is used for EV-DO data, it cannot be used for voice calls. Not only would VOIP over Revision A networks allow carriers to use their spectrum more efficiently by not having to separate voice and data, it would increase efficiency by allowing them to carry more voice calls in a data channel than in a traditional voice channel. Qualcomm was able to squeeze up to 30 times more voice calls in a 1.25 MHz channel using VOIP than traditional voice connections in their test.

more info at Qualcomm »

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