Wiping Memory on the Cisco DX‑80
Factory Reset Options
According to Cisco’s DX Series Administration Guide, any of the following factory-reset methods fully erase all user-accessible data and settings:
Via UCM Admin GUI with “Wipe Device” option
In the Settings app under Backup & reset → Factory data reset
Using key-press sequence (Volume Up + Mute during boot for DX‑80)
A factory reset does:
Erase all user config, locale, and network settings
Delete call history, custom wallpapers, certificates, CTL files, and phonebook
Reset security settings and 802.1x state
Data Volatility & Residual Memory
Cisco’s documentation does not state volatile/non-volatile memory specifics, but indicates that factory reset removes all user-stored data:
Flash memory is wiped of user files and certificates
Call logs and configs are cleared
CTL file (certificate trust list) is deleted
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For extremely high-security environments, some admins still choose to overwrite flash partitions or physically destroy the device—similar to best-practices used for routers and switches, though that’s likely overkill for most cases
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Bottom Line
While Cisco does not provide a “volatility statement” per se, the factory-reset process ensures all user data, credentials, certificates, logs, and settings are removed.
If you need extra assurance:
Repeat the factory reset
Overwrite the flash via firmware uploads or diagnostic modes
For top-tier security, destroy or sanitize the hardware per data policies
Recommended Actions
Perform a factory reset using any of the documented methods.
If you’re auditing compliance, capture logs/screenshots of the reset flow.
Optionally, re-flash firmware or cycle through multiple resets to overwrite residual data.
For highest security standards, decommission or physically destroy the unit.
