Source note · SIP response codes and failure interpretation
A 1xx response is provisional and every other class is final and a final response completes the transaction.
Checked 2026-09-15
- Vendor
- IETF
- Product
- Session Initiation Protocol
- Subsystem
- transactions
- Deployment
- not restricted
- Region
- not restricted
- Release range
- current as of 2026-09-15
- Checked
- 2026-09-15
Sources
- RFC 3261 — SIP: Session Initiation Protocol — IETF / RFC Editor · tier 1 standards and regulators · RFC 3261 sections 17 and 21
Cite this note
APA
WarmTransfer. (2026, September 15). SIP response codes and failure interpretation: source note sip-final-response-ends-the-transaction. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-final-response-ends-the-transaction
BibTeX
@misc{warmtransfer-claim-sip-final-response-ends-the-transaction,
title = {SIP response codes and failure interpretation: source note sip-final-response-ends-the-transaction},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-final-response-ends-the-transaction},
note = {Source note sip-final-response-ends-the-transaction, checked 2026-09-15}
}