Source note · Troubleshooting calls that drop on hold or transfer
The conventional acknowledgement of a hold offer carrying a=sendonly is an answer carrying a=recvonly; RFC 6337 notes RFC 3264 describes this in non-normative language.
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 5.3 (Hold and Resume of Media)
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-hold-ack-recvonly. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-hold-ack-recvonly
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-hold-ack-recvonly,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-hold-ack-recvonly},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-hold-ack-recvonly},
note = {Source note sip-reinvite-call-drops-hold-ack-recvonly, checked 2026-09-30}
}