Source note · Branded calling and CNAM delivery
RFC 9796 defines a call-reason parameter for a short display message during alerting and recommends that the message be no longer than 64 characters.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP Call-Info
- Subsystem
- rich-call-data
- Deployment
- carrier-network
- Region
- not restricted
- Release range
- RFC 9796
- Checked
- 2026-09-24
Sources
- RFC 9796: SIP Call-Info Parameters for Rich Call Data — IETF / RFC Editor · tier 1 standards and regulators · Section 6 (call-reason parameter)
Cite this note
APA
WarmTransfer. (2026, September 24). Branded calling and CNAM delivery: source note branded-calling-cnam-call-reason-64-chars. WarmTransfer. https://warmtransfer.net/knowledge/claims/branded-calling-cnam-call-reason-64-chars
BibTeX
@misc{warmtransfer-claim-branded-calling-cnam-call-reason-64-chars,
title = {Branded calling and CNAM delivery: source note branded-calling-cnam-call-reason-64-chars},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/branded-calling-cnam-call-reason-64-chars},
note = {Source note branded-calling-cnam-call-reason-64-chars, checked 2026-09-24}
}