Source note · Troubleshooting calls that drop on hold or transfer
An offer sent in response to an offerless re-INVITE should include all codecs the UA is currently willing and able to use, not only those negotiated in earlier offer/answer exchanges.
Checked 2026-09-30
- Vendor
- IETF
- Product
- SIP
- Subsystem
- sdp-offer-answer
- Deployment
- any
- Region
- not restricted
- Release range
- RFC as published
- Checked
- 2026-09-30
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
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-offerless-reinvite-offer. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-offerless-reinvite-offer
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-offerless-reinvite-offer,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-offerless-reinvite-offer},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-offerless-reinvite-offer},
note = {Source note sip-reinvite-call-drops-offerless-reinvite-offer, checked 2026-09-30}
}