Source note · SIP call forwarding and routing loops
Unified CM's hop-count-based CFA activation block applies only when CFA is activated from the phone, the chain exceeds Forward Maximum Hop Count, and every phone in the chain uses CFA rather than CFB, CFNA or another forwarding type.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- call forwarding
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Checked
- 2026-09-25
Sources
- Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Call Forwarding — Cisco Systems · tier 2 current vendor documentation · Call Forward All Loop Prevention / Forward Maximum Hop Count conditions
Cite this note
APA
WarmTransfer. (2026, September 25). SIP call forwarding and routing loops: source note sip-forwarding-loops-cucm-cfa-only-cfa-chain. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-cucm-cfa-only-cfa-chain
BibTeX
@misc{warmtransfer-claim-sip-forwarding-loops-cucm-cfa-only-cfa-chain,
title = {SIP call forwarding and routing loops: source note sip-forwarding-loops-cucm-cfa-only-cfa-chain},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-forwarding-loops-cucm-cfa-only-cfa-chain},
note = {Source note sip-forwarding-loops-cucm-cfa-only-cfa-chain, checked 2026-09-25}
}