<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I am running 15.1 IOS (3925) and Callmanager 8.6(1). We are integrated to a Nortel PBX, which is configured for PRI-NI2. When the gateway is configured for MGCP, the PRI largely does not come up. However, we see ISDN Q.931 messages referencing communication on channel 64. Obviously this is not quite right. Occasionally, the PRI will go into service and the message of channel 64 goes away. If we do a no mgcp/mgcp when it is working it usually does not come back up. If we switch to h.323/sip, the PRI comes up no problems. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Has anyone seen anything of this variety?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='color:black'>Dennis Heim | </span></b><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Sr. Unified Collaboration Team Lead</span></b><b><span style='color:black'><o:p></o:p></span></b></p><p class=MsoNormal><span style='color:black'>World Wide Technology | 314.212.1814 | <a href="mailto:dennis.heim@wwt.com"><span style='color:blue'>dennis.heim@wwt.com</span></a><b><o:p></o:p></b></span></p><p class=MsoNormal><span style='color:black'>“Creating Impact, Ignition & Scalability”<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>