Source note · Troubleshooting SIP 403 Forbidden from a carrier
RFC 8688 defines 608 Rejected so that a calling party can learn that an intermediary, rather than the called party, rejected the call attempt.
Checked 2026-09-30
This response code enables calling parties to learn that an intermediary rejected their call attempt.
- Vendor
- IETF
- Product
- SIP
- Subsystem
- response codes
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-30
- Checked
- 2026-09-30
Sources
- RFC 8688: A Session Initiation Protocol (SIP) Response Code for Rejected Calls — IETF / RFC Editor · tier 1 standards and regulators · abstract; section 3.1
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc8688-608. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc8688-608
BibTeX
@misc{warmtransfer-claim-sip-403-forbidden-troubleshooting-rfc8688-608,
title = {Troubleshooting SIP 403 Forbidden from a carrier: source note sip-403-forbidden-troubleshooting-rfc8688-608},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-403-forbidden-troubleshooting-rfc8688-608},
note = {Source note sip-403-forbidden-troubleshooting-rfc8688-608, checked 2026-09-30}
}