Extension Mobility requires a reachable TFTP server, and phone support must be checked in the phone documentation because EM extends to most but not all Cisco IP phones.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- extension-mobility
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs, current as of 2026-09-24
- Checked
- 2026-09-24
Sources
- Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility — Cisco Systems · tier 2 current vendor documentation · Extension Mobility Prerequisites
Cite this note
APA
WarmTransfer. (2026, September 24). Unified CM Extension Mobility and cross-cluster Extension Mobility: source note cucm-extension-mobility-prereq-tftp. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-extension-mobility-prereq-tftp
BibTeX
@misc{warmtransfer-claim-cucm-extension-mobility-prereq-tftp,
title = {Unified CM Extension Mobility and cross-cluster Extension Mobility: source note cucm-extension-mobility-prereq-tftp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-extension-mobility-prereq-tftp},
note = {Source note cucm-extension-mobility-prereq-tftp, checked 2026-09-24}
}