How to Reset Cisco 7821 | 7841 IP Phone to factory default

Many times we have to reset Cisco Routers, Switches, and Firewalls to their factory default settings. So, in this article, we will discuss how we can reset the Cisco IP phone. So, let’s start!

how-to-reset-cisco-7841-and-7821-ip-phone

Method 1: Steps to reset Cisco 7821 IP phone using Keypad

Power of the IP phone
- If connected with a direct power cube, remove the power cube.
- If connected with PoE (Power over Ethernet), remove the LAN cable.
Wait 5 seconds.
Press and hold # and plug the phone back in.
When the light on the Mute button and handset light strip turns off and all other lights (Line button, Headset button, Speakerphone button, and Select button) stay green, press 123456789*0# in sequence.
- When you press 1, the lights on the line buttons turn red. The light on the Select button flashes when a button is pressed.
- After you press these buttons, the phone goes through the factory reset process.
- If you press the buttons out of sequence, the phone powers on normally.

Warning: Do not remove power from the IP phone until it completes this process and the home screen appears.

Method 2: Steps to reset Cisco 7841 IP phone using Phone Menu Settings

Power on the IP phone naturally and let the boot process complete.
After the boot process is complete, hit the setting button.
Hit the unlock combination “**#”.
Now, you’ll see an “Erase” softkey appear.

Method 3: Steps to reset Cisco 7821 IP phone using Phone Menu Setting

If you want to reset your IP phone using your Phone settings, you have to follow the below steps. The only prerequisite is that you must know your Administrator Password.