Source note · SIP registration failures
In the RFC 3665 unsuccessful registration example, a REGISTER carrying credentials is answered with another 401 Unauthorized because the password does not match the one set for the account.
Checked 2026-09-25
- Vendor
- not restricted
- Product
- SIP
- Subsystem
- authentication
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 3665
- Checked
- 2026-09-25
Sources
- RFC 3665: Session Initiation Protocol (SIP) Basic Call Flow Examples — RFC Editor / IETF · tier 1 standards and regulators · Section 2.5 Unsuccessful SIP Registration, response to F3
Cite this note
APA
WarmTransfer. (2026, September 25). SIP registration failures: source note sip-registration-failures-bad-password-401. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-registration-failures-bad-password-401
BibTeX
@misc{warmtransfer-claim-sip-registration-failures-bad-password-401,
title = {SIP registration failures: source note sip-registration-failures-bad-password-401},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-registration-failures-bad-password-401},
note = {Source note sip-registration-failures-bad-password-401, checked 2026-09-25}
}