Source note · SS7 and carrier interworking concepts
RFC 6432 permits any SIP response except 100 Trying to carry a Reason header with a Q.850 cause code; it permits but does not mandate this.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP
- Subsystem
- Reason header
- Deployment
- carrier, on-premises, multi-tenant
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- RFC 6432: Carrying Q.850 Codes in Reason Header Fields in SIP (Session Initiation Protocol) Responses — IETF / RFC Editor · tier 1 standards and regulators · Section 3
Cite this note
APA
WarmTransfer. (2026, September 24). SS7 and carrier interworking concepts: source note ss7-carrier-interworking-reason-in-responses. WarmTransfer. https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-reason-in-responses
BibTeX
@misc{warmtransfer-claim-ss7-carrier-interworking-reason-in-responses,
title = {SS7 and carrier interworking concepts: source note ss7-carrier-interworking-reason-in-responses},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/ss7-carrier-interworking-reason-in-responses},
note = {Source note ss7-carrier-interworking-reason-in-responses, checked 2026-09-24}
}