Source note · SIP 488 and codec negotiation failures
RFC 3261 defines 415 Unsupported Media Type as the server refusing a request because the message body is in a format the server does not support for that method; it concerns the body type (for example the Content-Type) rather than codecs inside SDP.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- response codes
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3261
- Checked
- 2026-09-25
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · Section 21.4.13 415 Unsupported Media Type
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 488 and codec negotiation failures: source note sip-488-codec-failures-rfc3261-415-meaning. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-rfc3261-415-meaning
BibTeX
@misc{warmtransfer-claim-sip-488-codec-failures-rfc3261-415-meaning,
title = {SIP 488 and codec negotiation failures: source note sip-488-codec-failures-rfc3261-415-meaning},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-rfc3261-415-meaning},
note = {Source note sip-488-codec-failures-rfc3261-415-meaning, checked 2026-09-25}
}