The RFC Editor's document information page for RFC 3515 lists it as updated by 2 documents: RFC 8217 Clarifications for When to Use the name-addr Production in SIP Messages and RFC 7647 Clarifications for the Use of REFER with RFC 6665.

Checked 2026-09-16

Vendor
IETF
Product
Session Initiation Protocol
Subsystem
Document status
Deployment
not restricted
Region
not restricted
Release range
not restricted
Checked
2026-09-16

Sources

Cite this note

APA

WarmTransfer. (2026, September 16). Call transfer semantics REFER and Replaces: source note xfersem-rfc3515-is-updated-twice. WarmTransfer. https://warmtransfer.net/knowledge/claims/xfersem-rfc3515-is-updated-twice

BibTeX

@misc{warmtransfer-claim-xfersem-rfc3515-is-updated-twice,
  title  = {Call transfer semantics REFER and Replaces: source note xfersem-rfc3515-is-updated-twice},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/xfersem-rfc3515-is-updated-twice},
  note   = {Source note xfersem-rfc3515-is-updated-twice, checked 2026-09-16}
}

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