Resetting a Cisco UC520 to factory defaults by CLI

Posted on February 16, 2011

There are two components to reset.

Voicemail CUE reset:

  1. Service-module Integrated-Service-Engine 0/0 session. (Hit ‘enter’ twice to get a prompt).
  2. Type ‘offline’ to go into the offline mode
  3. Type in ‘y’ when you are prompted with ‘Are you sure you want to go offline[n]?’
  4. Type in ‘restore factory default
  5. Type in ‘y’ when you are prompted with ‘Do you wish to continue[n]?’
  6. Press the Enter key when prompted to ‘Press any key to reload:’ (This reset can take 5-10 minutes. Wait until the CUE message ‘SYSTEM ONLINE’ is displayed before proceeding.)
  7. Exit the CUE by typing ‘exit’

iOS Reset:

  1. Get into IOS command line mode.
  2. Type 'enable' mode (default password is 'cisco').
  3. Type in 'show flash:'
  4. Page down and look for something like ... UC520-8U-4FXO-K9-FACTORY (this is the factory default configuration...never copy TO this file!!)
  5. Type in 'copy flash: <filename you found> startup' . (This will copy your default config file TO the startup-file in NVRAM.)
  6. Once that is complete, type 'reload'
  7. Type 'Y' twice.

Once rebooted, plug a laptop into one of the internal ports and set it for DHCP. You will be provided a 192.168.1.X address. Connect to with your CCA and you can start the wizards.

Thanks to Phil @ for this. Used it 6 times. The CCA on 3.0 is just HORRIBLE to reset. Failed every time.

Update: There have been instances where the reset does not take properly. If you successfully reset the Voicemail CUE, try resetting the iOS config only again. If this fails, run the entire process again. Both parts. If you cannot connect to the service-module to reset the Voicemail CUE, revise the ACL for the Voicemail system to allow all incoming/outgoing. It's generally ACL 101.