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89XX series factory reset procedure from key pad

This article goes over how to do a factory reset on Cisco 8900 series IP phones when the device will not complete the boot process.

Note: when using a VPN phone please make sure that the phone is behind an ASA or a Managed Circuit before performing a factory reset as doing so can cause the phone to lose VPN functionality.


Step 1  Remove power from the phone in one of these ways:

  • Unplug the power adapter.
  • Unplug the LAN cable.

Step 2  Press the pound (#) key and plug the phone in.

Step 3  When the Headset and Speaker buttons are lit, enter the following key sequence:


The phone resets.

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