I am new to iphone development. I want to develop an VOIP application. Anybody give me some ideas to start.I have tried "siphon" and "telephone" open source projects but they did not run. Thanx for any suggestion.
Brad Larson
For developing iPhone VOIP applications, you will probably want to read the answers to the question "Open Source VoIP/SIP Objective-C Code".
As you seem to have already tried siphon, but were unable to get it to compile, you might be interested in the answers to the question "How to compile pjsip for iphone 3.0" (pjsip is what is used for siphon).
来源：https://stackoverflow.com/questions/2620539/implementing-voip-in-iphone