Source note · Troubleshooting Cisco IP phones stuck upgrading firmware
Deleted firmware loads cannot be restored except by a DRS restore, so deleting the wrong load can leave phones assigned to it unable to find their file.
Checked 2026-10-02
- Vendor
- Cisco
- Product
- Cisco Unified Communications Manager
- Subsystem
- device firmware
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15 and SUs
- Checked
- 2026-10-02
Sources
- Administration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Manage Device Firmware — Cisco Systems · tier 2 current vendor documentation · Remove Unused Firmware from the System (caution)
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Cisco IP phones stuck upgrading firmware: source note cucm-phone-firmware-upgrade-troubleshooting-delete-drs-only. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-phone-firmware-upgrade-troubleshooting-delete-drs-only
BibTeX
@misc{warmtransfer-claim-cucm-phone-firmware-upgrade-troubleshooting-delete-drs-only,
title = {Troubleshooting Cisco IP phones stuck upgrading firmware: source note cucm-phone-firmware-upgrade-troubleshooting-delete-drs-only},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-phone-firmware-upgrade-troubleshooting-delete-drs-only},
note = {Source note cucm-phone-firmware-upgrade-troubleshooting-delete-drs-only, checked 2026-10-02}
}