Source note · SIP call forwarding and routing loops
The Diversion header has a counter parameter, and RFC 5806 says the ISUP Redirection Counter should be set to the sum of the counters of all Diversion headers in the SIP message.
Checked 2026-09-25
- Vendor
- IETF
- Product
- SIP
- Subsystem
- Diversion
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 5806
- Checked
- 2026-09-25
Sources
- RFC 5806: Diversion Indication in SIP — IETF / RFC Editor · tier 1 standards and regulators · Section 4 (syntax, counter parameter); Section 9.2.4 (ISUP mapping)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP call forwarding and routing loops: source note sip-forwarding-loops-diversion-counter. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-diversion-counter
BibTeX
@misc{warmtransfer-claim-sip-forwarding-loops-diversion-counter,
title = {SIP call forwarding and routing loops: source note sip-forwarding-loops-diversion-counter},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-diversion-counter},
note = {Source note sip-forwarding-loops-diversion-counter, checked 2026-09-25}
}