Source note · Carrier escalation evidence packages

RFC 7989 states that intermediaries such as session border controllers alter call identifiers in signaling, so the SIP Call-ID is not suitable for tracking a session end to end.

Checked 2026-09-24

Vendor: IETF
Product: SIP
Subsystem: session identification
Deployment: any
Region: not restricted
Release range: RFC 7989
Checked: 2026-09-24

Sources

RFC 7989: End-to-End Session Identification in IP-Based Multimedia Communication Networks — IETF / RFC Editor · tier 1 standards and regulators · Section 1, Introduction

Cite this note

APA

WarmTransfer. (2026, September 24). Carrier escalation evidence packages: source note carrier-escalation-evidence-call-id-altered-by-sbc. WarmTransfer. https://warmtransfer.net/knowledge/claims/carrier-escalation-evidence-call-id-altered-by-sbc

BibTeX

@misc{warmtransfer-claim-carrier-escalation-evidence-call-id-altered-by-sbc,
  title  = {Carrier escalation evidence packages: source note carrier-escalation-evidence-call-id-altered-by-sbc},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/carrier-escalation-evidence-call-id-altered-by-sbc},
  note   = {Source note carrier-escalation-evidence-call-id-altered-by-sbc, checked 2026-09-24}
}

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