Source note · SIP call forwarding and routing loops
Each History-Info entry carries a mandatory index parameter, written as dot-separated integers such as 1.1.2, that records the chronological order and branching of retargeting hops.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- History-Info
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 7044 onward
- Checked
- 2026-09-25
Sources
- RFC 7044: An Extension to the Session Initiation Protocol (SIP) for Request History Information — IETF / RFC Editor · tier 1 standards and regulators · Section 10.3 (index parameter)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP call forwarding and routing loops: source note sip-forwarding-loops-history-info-index. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-history-info-index
BibTeX
@misc{warmtransfer-claim-sip-forwarding-loops-history-info-index,
title = {SIP call forwarding and routing loops: source note sip-forwarding-loops-history-info-index},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-history-info-index},
note = {Source note sip-forwarding-loops-history-info-index, checked 2026-09-25}
}