Source note · SIP early offer and delayed offer
RFC 6337 recommends that an offer sent in response to an offerless (re-)INVITE include all codecs the UA is currently willing and able to use, not only those negotiated in earlier exchanges.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- offer-answer
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 6337 (Informational)
- Checked
- 2026-09-25
Sources
- RFC 6337: Session Initiation Protocol (SIP) Usage of the Offer/Answer Model — IETF / RFC Editor · tier 1 standards and regulators · Section 5.2.5 Subsequent Offers and Answers
Cite this note
APA
WarmTransfer. (2026, September 25). SIP early offer and delayed offer: source note sip-early-delayed-offer-rfc6337-offerless-reinvite-all-codecs. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-rfc6337-offerless-reinvite-all-codecs
BibTeX
@misc{warmtransfer-claim-sip-early-delayed-offer-rfc6337-offerless-reinvite-all-codecs,
title = {SIP early offer and delayed offer: source note sip-early-delayed-offer-rfc6337-offerless-reinvite-all-codecs},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-early-delayed-offer-rfc6337-offerless-reinvite-all-codecs},
note = {Source note sip-early-delayed-offer-rfc6337-offerless-reinvite-all-codecs, checked 2026-09-25}
}