As you know, E61 has the Voice of IP (VoIP) functionality built in. Providing the right configuration, this phone can make Internet calls. I have successfully configured the SIP settings for my E61, and VoIP works on the device.
My question is: is there any API at all (public / privileged) that allows me to interact and control the VoIP to make an Internet call? For regular voice calls, I can use CTelephony provided by the SDK to dial a number, put conversation on hold, etc. However, there are no references to Internet Call from the Symbian S60 3rd SDK. I'd like to ask the experts there: Is there any Nokia proprietary API that allows me to dial a SIP address or pickup an incoming Internet call?
By the way, there is this CTelephony::EstablishDataCall(), what exact is a 'data call'?