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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Is PRACK enabled on the sip trunk?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> cisco-voip [mailto:cisco-voip-bounces@puck.nether.net] <b>On Behalf Of </b>Abebe Amare<br><b>Sent:</b> Friday, July 24, 2015 1:54 AM<br><b>To:</b> cisco voip<br><b>Subject:</b> [cisco-voip] TEHO using SIP trunk ringback issue<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hi,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The call flow is like this:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>CUCM cluster 1 ----SIP Trunk---->CUCM cluster 2---H323---->Voice gateway----ISDN PRI--->PSTN<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The problem is when calling from clus<span style='font-family:"Arial",sans-serif'>ter 1 to the PSTN, the CUCM in cluster 2 plays ring back tone whether the final destination i</span>s reachable or not, we don’t hear the PSTN announcements in case the number is wrong or unreachable or…etc. How to remedy this.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>thanks in advance<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>