RIM adds voice-over-WiFi and SIP to Blackberry

Want to add more enterprise communications to the most popular of enterprise mobile phones? Just add WiFi VoIP calling and SIP.

That's exactly what RIM is doing with its popular Blackberry phones. It's latest OS 5.0 build for its phones will now offer VoIP calls over WiFi and SIP functionality which will eventually result in even more unified communications opportunities. The new offering allows users to take their PBX extensions with them through their Blackberry mobile device and track presence status depending on where they log in on various WiFi networks. Calls are routed back through the IP PBX, saving the company cash on call minutes as well as detecting an employee's location and presenting the appropriate business extensions to callers. 

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