Source note · Hold resume and conference signaling
RFC 3911 says a UAS that finds no dialog matching the Join header rejects the INVITE with 481 Call/Transaction Does Not Exist.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP Join header
- Subsystem
- join
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3911 as published
- Checked
- 2026-09-24
Sources
- The Session Initiation Protocol (SIP) "Join" Header — IETF / RFC Editor · tier 1 standards and regulators · Section 4 User Agent Server Behavior: Receiving a Join Header
Cite this note
APA
WarmTransfer. (2026, September 24). Hold resume and conference signaling: source note hold-resume-conference-3911-join-481. WarmTransfer. https://warmtransfer.net/knowledge/claims/hold-resume-conference-3911-join-481
BibTeX
@misc{warmtransfer-claim-hold-resume-conference-3911-join-481,
title = {Hold resume and conference signaling: source note hold-resume-conference-3911-join-481},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/hold-resume-conference-3911-join-481},
note = {Source note hold-resume-conference-3911-join-481, checked 2026-09-24}
}