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.

Converting audio to a supported audio codec format on the Cisco UC520 VoIP Box

Posted on February 15, 2011

We recently had some fun finding a conversion utility that would take .WAV or .MP3 and properly encode them to an 8bit uLaw format that is supported by the Cisco UC520. After playing around with the over 6 available conversion utilities (and quite a few fun viruses packed into a few of them), we came up with a product from

It's free ... it works, and it's very quick to use.

1) Record a WAV or MP3 recording of a greeting or prompt you would like to use with the UC520
2) Download the "Switch Audio File Converter" free conversion utility from the above url.
3) Install and Load.
4) Drag and Drop the file you are looking to convert into the main pane.
5) In the bottom left change the "output format" to ".wav"
6) Change the Encoder Options to CCITT u-Law @ 8.000 kHz, 8Bit, Mono
7) Pick a location to save the converted file and hit convert.

That's it. Take the file and use the Web-Gui or CCA (Cisco Configuration Assistant) to upload the file.

Things to remember:

- Cisco requires the file to be a .WAV format @ u-Law 8kHz 8Bit mono, anything else will fail.
- The file cannot be larger than 1mb.
- The quality will not be similar to an MP3 or Wav, its mono and 8bit. Your phone system isn't a high-end stereo system.