<div>Hi All</div>
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<div>I'm trying to route inbound calls from SIP trunks through CUCM to another PBX connected with QSIG, I have CUCM 8.0.3, with QSIG links to a IPC dealerboard system and also a Nortel CS1000 PBX, these are set up as MGCP in CUCM.</div>
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<div>I also have SIP trunks for PSTN providing both inbound and outbound calling. The issue I have is when I route inbound calls from the SIP trunks to CUCM and across the QSIG links to the PBX's, the call will not complete and I get Resources Unavailable, Unspecified on the debug on the gateway, I have also taken a SIP trace and get a 503 Service Unavailable from CUCM to the SIP trunks for the same call.</div>
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<div>Has anyone successfully done this before and can I route SIP to Qsig or would I need a CUBE even though its going through CUCM.</div>
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<div>I have attached the debug and SIP trace.</div>
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<div>Any help would be greatly appreciated as this is rather urgent now.</div>
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<div>Regards</div>
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<div>Nick </div>