Source note · Carrier escalation evidence packages
SIP final failure responses fall into three classes: 4xx client error, 5xx server error and 6xx global failure.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP
- Subsystem
- response codes
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3261
- Checked
- 2026-09-24
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · Section 7.2
Cite this note
APA
WarmTransfer. (2026, September 24). Carrier escalation evidence packages: source note carrier-escalation-evidence-sip-failure-classes. WarmTransfer. https://warmtransfer.net/knowledge/claims/carrier-escalation-evidence-sip-failure-classes
BibTeX
@misc{warmtransfer-claim-carrier-escalation-evidence-sip-failure-classes,
title = {Carrier escalation evidence packages: source note carrier-escalation-evidence-sip-failure-classes},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/carrier-escalation-evidence-sip-failure-classes},
note = {Source note carrier-escalation-evidence-sip-failure-classes, checked 2026-09-24}
}