sipdroid - Multiple call handling

[Priyank]

I just installed SIPDROID. I made three account in sip2sip.(free SIP provider). 

Then after I have configured application using one of that account. Application works fine.

Question is: 

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

Multiple call on the same phone seems not working. The first call getting picked up but what about the second call which is coming during first call is going on. 

Even second call is not displaying on the screen. Confused !!