Conference call between gsm and android
<p>I have asterisk installed in a server and conference room [extension] is created. Assume some people are doing conference.
Now one person [a] make a gsm call to a sim with android phone---> target application recieve the call auto and hold the call, next join to the asterisk server conference call signed by a sip extension. </p>

<p>now how the application join that incoming gsm call to the sip based conference room?</p>

<p>So far i can recieve incoming call in android.
I can connect conference call using sip from android.</p>

<p>Need 2 help:
1]How to do call hold in android?
2]How to connect that incoming gsm call to sip based conference call? Is it possible?</p>

<p>I cant effort any hardware like goip, so need to develop android application. Can anyone show me some light?</p>
