Source note · Hold resume and conference signaling
RFC 6337 says an answer to an offer with c=IN IP4 0.0.0.0 must still choose its direction attribute from the direction attribute of the offered stream.
Checked 2026-09-24
If a UA generates an answer to the offer received with "c=IN IP4 0.0.0.0", the direction attribute of the accepted media stream in the answer must still be based on direction attribute of the offered stream.
- Vendor
- IETF
- Product
- SIP
- Subsystem
- legacy hold
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 6337 as published
- Checked
- 2026-09-24
Sources
- RFC 6337: Session Initiation Protocol (SIP) Usage of the Offer/Answer Model — IETF / RFC Editor · tier 1 standards and regulators · Section 5.4 Behavior on Receiving SDP with c=0.0.0.0
Cite this note
APA
WarmTransfer. (2026, September 24). Hold resume and conference signaling: source note hold-resume-conference-6337-zero-addr-answer-direction. WarmTransfer. https://warmtransfer.net/knowledge/claims/hold-resume-conference-6337-zero-addr-answer-direction
BibTeX
@misc{warmtransfer-claim-hold-resume-conference-6337-zero-addr-answer-direction,
title = {Hold resume and conference signaling: source note hold-resume-conference-6337-zero-addr-answer-direction},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/hold-resume-conference-6337-zero-addr-answer-direction},
note = {Source note hold-resume-conference-6337-zero-addr-answer-direction, checked 2026-09-24}
}