Media5 has released a SIP client application that allows the Apple iPhone and iPod Touch to be used as a IP-PBX extension.
The company says the full-featured softphone enables the Apple devices to be used to access the same phone services and features as if they were in the office.

VoIP telephone services in Western Europe leapt to just under 30 million consumer lines by mid-2008 - up from 20 million only a year earlier.
That figure has continued to climb and totalled 35 million lines at the end of the year, according to a survey by researchers TeleGeography.