<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000'><div>Hello,</div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8"><br></div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8">does anyone have any ideas regarding this issue ?</div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8"><br></div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8">Many thanks for any tips you may have.</div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8"><br></div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8">Kind regards,</div><div id="956e4f19-49f6-4bbc-bdd4-c56101d702d8">Giuseppe</div><hr id="zwchr"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>Da: </b>"Giuseppe Cardone" <g.cardone@unidata.it><br><b>A: </b>users@lists.opensips.org<br><b>Inviato: </b>Giovedì, 10 luglio 2014 15:11:54<br><b>Oggetto: </b>PRACK Interworking with OpenSIPs<br><br><style>p { margin: 0; }</style><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000"><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">Hello,</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">I am trying OpenSIPs and would like to figure out if I can use it to perform sip interworking between two UA's, one requiring PRACK and another that doesn't support it.</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">In essence when OpenSIPs receives a 18x response with headers "Required: 100rel" and "RSeq" from the called party, it should initiate a PRACK request towards the called party itself, but, as you might expect from a proxy, I don't see any function to do this. However, maybe someone with a better understanding of OpenSIPs can tell me if it is available.</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">The b2bua module is were I was placing my hopes. However, here too I cannot see a way to initiate a PRACK request, or any request apart from an INVITE (using the 'bridge' action) or a BYE (using the 'end_dialog_leg').</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">Can anyone confirm whethere my conclusions on PRACK interworking with OpenSIPs are correct and/or provide any ideas as to how this may be accomplished ?</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">Many thanks,</div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;">Giuseppe </div><div style="color: rgb(0, 0, 0); font-family: 'times new roman', 'new york', times, serif; font-size: 12pt;"><br></div><div><font face="times new roman, new york, times, serif"></font></div></div></blockquote><style>p { margin: 0; }</style></div></body></html>