Source note · SIP 488 and codec negotiation failures
When every offered stream is rejected for lack of an acceptable crypto suite, the SIP-level result is most likely a 488 to the INVITE, by combining RFC 4568 stream rejection with RFC 6337 offer-rejection guidance; RFC 4568 itself names no SIP response code.
inferred · Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- SRTP keying
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 4568 and RFC 6337
- Status
- inferred
- Checked
- 2026-09-25
Sources
- RFC 4568: Session Description Protocol (SDP) Security Descriptions for Media Streams — IETF / RFC Editor · tier 1 standards and regulators · Section 5.1.2 combined with RFC 6337 Section 2.3
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 488 and codec negotiation failures: source note sip-488-codec-failures-crypto-mismatch-488. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-crypto-mismatch-488
BibTeX
@misc{warmtransfer-claim-sip-488-codec-failures-crypto-mismatch-488,
title = {SIP 488 and codec negotiation failures: source note sip-488-codec-failures-crypto-mismatch-488},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-crypto-mismatch-488},
note = {Source note sip-488-codec-failures-crypto-mismatch-488, checked 2026-09-25}
}