Source note · Troubleshooting SIP 403 Forbidden from a carrier
RFC 3325, an Informational RFC, defines P-Asserted-Identity as a header field used among trusted SIP entities to carry the identity of the user sending a SIP message as it was verified by authentication.
Checked 2026-09-30
- Vendor
- IETF
- Product
- SIP
- Subsystem
- asserted identity
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- RFC 3325: Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks — IETF / RFC Editor · tier 1 standards and regulators · section 9.1
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc3325-pai. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc3325-pai
BibTeX
@misc{warmtransfer-claim-sip-403-forbidden-troubleshooting-rfc3325-pai,
title = {Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc3325-pai},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc3325-pai},
note = {Source note sip-403-forbidden-troubleshooting-rfc3325-pai, checked 2026-09-30}
}