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CVP-CUCM SIP 503 - Service unavailable.

Ritesh Desai
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Hi folks,

Am facing the same issue. Unable to trace the root cause. Can someone help to trace the problem.

Am having contact center environment where Inbound calls to Agents coming from PSTN are getting into RESERVED state on Cisco Finesse desktop. After tracing, found SIP 503, Service Unavailable on CUCM and VG logs. Also, I see error "Unable to find a device handler for the request received on port 8317 from 192.168.4.12 (CVP)" on CUCM Logs.

My lab environment contains ICM Sprawler, CVP, Finesse and VG with 1E1 interface.

On ICM, call hits and remains in Queue to SG Node. Call doesnot move from Success or failure node.

Attached CUCM and ICM logs. VG Config attached reference.

regards,

Ritesh Desai.

*** Please rate helpful post. Please mark as answer if it solves your problem/query.
regards, Ritesh Desai
1 Reply 1

Ritesh Desai
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Guys,

Problem is resolved. Error causing was due to missing SIP trunk between CUCM and CVP.

regards,

Ritesh Desai.

*** Please rate helpful post. Please mark as answer if it solves your problem/query.
regards, Ritesh Desai