Source note · Troubleshooting calls that drop on hold or transfer
A modified SDP offer MUST keep a matching media stream for every stream in the previous SDP, and the version in the origin (o=) field MUST increment by one from the previous SDP.
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 3264 — An Offer/Answer Model with the Session Description Protocol (SDP) — IETF / RFC Editor · tier 1 standards and regulators · Section 8 (Modifying the Session)
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-mline-and-version. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-mline-and-version
BibTeX
@misc{warmtransfer-claim-sip-reinvite-call-drops-mline-and-version,
title = {Troubleshooting calls that drop on hold or transfer: source note sip-reinvite-call-drops-mline-and-version},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-reinvite-call-drops-mline-and-version},
note = {Source note sip-reinvite-call-drops-mline-and-version, checked 2026-09-30}
}