Source note · Call transfer semantics REFER and Replaces

A successful REFER transaction does not terminate the session between the Transferor and the Transferee; if those parties wish to end their session they must do so with a subsequent BYE.

Checked 2026-09-16

Note that a successful REFER transaction does not terminate the session between the Transferor and the Transferee. If those parties wish to terminate their session, they must do so with a subsequent BYE request.

Vendor: IETF
Product: Session Initiation Protocol
Subsystem: REFER
Deployment: not restricted
Region: not restricted
Release range: BCP 149
Checked: 2026-09-16

Sources

RFC 5589 — Session Initiation Protocol (SIP) Call Control - Transfer — IETF / RFC Editor · tier 1 standards and regulators · RFC 5589 section 5 Using REFER to Achieve Call Transfer, first paragraph

Cite this note

APA

WarmTransfer. (2026, September 16). Call transfer semantics REFER and Replaces: source note xfersem-refer-does-not-end-the-original-call. WarmTransfer. https://warmtransfer.net/knowledge/claims/xfersem-refer-does-not-end-the-original-call

BibTeX

@misc{warmtransfer-claim-xfersem-refer-does-not-end-the-original-call,
  title  = {Call transfer semantics REFER and Replaces: source note xfersem-refer-does-not-end-the-original-call},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/xfersem-refer-does-not-end-the-original-call},
  note   = {Source note xfersem-refer-does-not-end-the-original-call, checked 2026-09-16}
}

Read in context