<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi all<br><br>network topology:<br>VOIP Service Provider --------SIP trunk port 5070----Opensips1 --sip trunk port 5060----Opensips2----Ip phone<br><br>Media :<br>VOIP Service Provider --------Opensips1(rtpproxy)----Ip phone<br><br>can i use the B2B module on opensips1 to do topology hiding and use the rtpproxy on opensips1 to force media from IP phone to VOIP SP <br><br>please advice.<br><br>Thank you<br>Ha<br></td></tr></table><br>