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IOS ccsip and ccapi debug
debug ccsip messages prints SIP on IOS voice. debug voip ccapi inout prints call-control API output, which is not a SIP RFC.
Learn in 5 minutes
- Read debug ccsip messages as SIP
- Keep ccapi output out of the RFC pile
- Match a synthetic debug line to the ladder
Visual
Both are IOS voice operations output. Only one of them is the SIP message.
Worked example
Dissect the SIP inside the debug The message below is what a synthetic debug ccsip messages capture would contain after the IOS prefix. debug voip ccapi inout is a different IOS command and is not this text.
- Dissect the INVITE.
- Check that CSeq method is INVITE.
- Find the Via branch.
Fault
The ticket quotes an IOS ccapi indication as if it were SIP/2.0 488.
ccapi tells you the voice application saw a setup. It does not invent a status code.
Quiz
Ecosystem
Glossary, sister systems, and the integration seam for this room.
Analytics Amazon Connect can attach conversational analytics to an external voice system with a SIPREC connector. The analytics plane is not a second SIP proxy for the customer call.
Sources and go deeper
- Cisco CUBE basic SIP configuration — last checked 2026-10
- RFC 3261 — last checked 2026-10
- RFC 3261 §21 — last checked 2026-10
- RFC 3261 §8 — last checked 2026-10