Java SipServlet to build VOIP phone calls (between Computer and analog phone/mobile)
问题 I'm interested in building VOIP that actually can be used to call to analog phone using SIP or H.323. But my question is that, is it even possible to build Computer to Phone & Phone to Computer VOIP phone calls with SIP or H.323? Else what is the most common way of achieving this task? I've successfully built an application that i can transfer voices between two computers by using socket, and my guess is that building SIP to communicate with analog phone is quite complicated (even though i