Source note · Troubleshooting Cisco IP phones stuck upgrading firmware
The 8800 status message Checksum Error means the downloaded software file is corrupted; the action is to get a new copy of the firmware and place it in the TFTPPath directory.
Checked 2026-10-02
Downloaded software file is corrupted.
- Vendor
- Cisco
- Product
- Cisco IP Phone 8800 Series
- Subsystem
- phone diagnostics
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager - Monitoring Phone Systems — Cisco Systems · tier 2 current vendor documentation · Status Messages table, row 'Checksum Error'
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting Cisco IP phones stuck upgrading firmware: source note cucm-phone-firmware-upgrade-troubleshooting-checksum-error. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-phone-firmware-upgrade-troubleshooting-checksum-error
BibTeX
@misc{warmtransfer-claim-cucm-phone-firmware-upgrade-troubleshooting-checksum-error,
title = {Troubleshooting Cisco IP phones stuck upgrading firmware: source note cucm-phone-firmware-upgrade-troubleshooting-checksum-error},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-phone-firmware-upgrade-troubleshooting-checksum-error},
note = {Source note cucm-phone-firmware-upgrade-troubleshooting-checksum-error, checked 2026-10-02}
}