Organizing IP telephony (dialing, dial-up, two-way voice communication, etc) in an mobile application

Oleg will talk about his experience of linking an iOS mobile application with a bank's internal ATS:

• How to understand and implement the SIP protocol?
• How to organize the transmission of an audio stream?
• Which SipProxy server should be used to communicate with the PBX closed from the "outside world"?
• What are the ways to overcome NAT?