Source note · Call transfer semantics REFER and Replaces

In a basic transfer the Transferor gives the Transfer Target's contact to the Transferee, and RFC 5589 notes that the contact has been exposed and can be used to make new calls in future.

Checked 2026-09-16

Note that the Transfer Target's contact information has been exposed to the Transferee. The provided contact can be used to make new calls in the future.

Vendor: IETF
Product: Session Initiation Protocol
Subsystem: Basic transfer
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 6 Basic Transfer, opening paragraph

Cite this note

APA

WarmTransfer. (2026, September 16). Call transfer semantics REFER and Replaces: source note xfersem-basic-transfer-exposes-the-target-contact. WarmTransfer. https://warmtransfer.net/knowledge/claims/xfersem-basic-transfer-exposes-the-target-contact

BibTeX

@misc{warmtransfer-claim-xfersem-basic-transfer-exposes-the-target-contact,
  title  = {Call transfer semantics REFER and Replaces: source note xfersem-basic-transfer-exposes-the-target-contact},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/xfersem-basic-transfer-exposes-the-target-contact},
  note   = {Source note xfersem-basic-transfer-exposes-the-target-contact, checked 2026-09-16}
}

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