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<div style="font-family:verdana, helvetica, sans-serif;font-size:10pt;"><div>Hello Anca, </div><div><br></div><div>I have read the b2bua tutorial and have opensips 1.62 installed. </div><div>I am mainly interested in the REFER scenario..</div><div><br></div><div>Would the current implementation of the b2bua support the following scenario ?</div><div><br></div><div>UE-A calls UE-C and are in a call. UE-C puts UE-A on hold.</div><div>UE-C call UE-B and are in a call. UE-C puts UE-B on hold.</div><div><br></div><div>OpenSIPs is not in the path of the original calls.</div><div><br></div><div>Before UE-C bridges UE-A and UE-B, UE-C wishes to get out the middle of the call.</div><div>One way would be to send a REFER to UE-B .</div><div><br></div><div>What if the switch UE-B is connected to does not support REFER ? So I want to do the following..</div><div><br></div><div>UE-C sends a REFER to SIP-AS ( OPENSIPS ) and upon receipt of
the REFER,</div><div>using the B2BUA , the SIP-AS would send an INVITE w/replaces and no SDP to UE-B</div><div>Upon receiving the 200 Ok w/SDP. the SIP-AS would send an INVITE to UE-A with the</div><div>SDP received from UE-B's 200 Ok. Upon receiving an ACK from UE-A , SIP-AS would</div><div>send an ACK back to UE-B and an INFO message to UE-C and appropriate BYEs.</div><div><br></div><div>Below is a simple flow chart... </div><div><br></div><div><br></div><div>UE-C REFER------------------> OPENSIPS B2BUA(SIP_AS) UE-B</div><div> </div><div> INVITE w/replaces no SDP----------------------> </div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>
</div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div> <------------------------------------------200 OK w/SDP(1) </div><div> </div><div>
INVITE w/ SDP (1) UE-A</div><meta http-equiv="content-type" content="text/html; charset=utf-8"></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div> ---------------------------------> </div></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div> <----------------200 OK w/SDP </div></div><div><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>
ACK---------------------------------------------------> </div></div><div><br></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div> ACK---------------------------></div></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><div> </div><div> <-------------------------NOTIFY</div></div></div><div><br></div><div>thanks in advance for your help,</div><div>--Jignesh</div><div><br></div><div> </div><div>
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