sipdroid - Another incoming call is not display while one is continue

Question

I have installed SIPDROID. I made three account at sip2sip. After that I have configured application using one of that account. Application works fine.

Answer 1

SipDroid supports only one line at all times. This means you cannot have conference calls. So to the question:

If I make multiple call to the same phone using SIP is there anyway to handle all calls at a same time?

Nope, you cannot handle simultaneous calls at the same time. Fortunately there's another open source SIP Client that supports multiple lines - IMSDroid. Though you can extend SipDroid to support multiple lines, that's a lot of effort. The main objects you have to pay attention to in order to support multiple lines are: UserAgent, SipProvider (note that it's designed to support multiplexing/demultiplexing of SIP messages), JAudioLauncher and the Call object.

The bug you're describing with the second call not showing is not something I have witnessed. This could be due to your device setup, or due to customizations performed on the original code...