Cisco IP Phone CP-8845 8800/8900 Series How To Reset To Factory Settings Instructions

This would be crucial especially if the phone is hardened, not being able to reset or change settings could prevent a phone registering in a new environment or even when migrating from office to office.

Updated Guide

1.) Reboot phone and hold the "#" key.

2.) Once the headset and volume key are green release the "#" key.

3.) Immediately press 123456789*0# (if you are successful when you press 1 the headset button should go dark).  If it doesn't try again. Timing is key and being off by .25 seconds is too much.

 


 

 

Here is Cisco's guide (timing is everything and it is more tricky than trying to jail break your iPhone):


Step 1 -- While powering up the phone, press and hold #.

Step 2 -- 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 flash when a button is pressed.

If you press the buttons out of sequence, the lights on the line button, headset button, speakerphone button, and select button turn green. You will need to start over and press 123456789*0# in sequence again.

After you press these buttons, the phone goes through the factory reset process.

Do not power down the phone until it completes the factory reset process, and the main screen appears.

Here is an alternative description some have had better luck with:

Step 1   Unplug the phone:
  • If using PoE, unplug the LAN cable.
  • If using the power cube, unplug the power cube.
Step 2   Wait 5 seconds.
Step 3   Press and hold # and plug the phone back in.
Step 4   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.

If you press the buttons out of sequence, the lights on the line button, headset button, speakerphone button, and Select button turn green. You need to start over and press 123456789*0# in sequence again.

After you press these buttons, the phone goes through the factory reset process.

 

*Just be forewarned again that it may take a few tries but it does work.

Sources: https://community.cisco.com/t5/ip-telephony-and-phones/cp-8945-factory-reset-not-working/td-p/2502278


Tags:

cisco, ip, cp, reset, factory, settings, instructionsthis, crucial, hardened, registering, migrating, tricky, iphone, powering, mute, handset, headset, speakerphone, select, sequence, pressed, completes, unplug, poe, lan, cube, flashes, forewarned, sources, https, telephony, td,

Latest Articles

  • Linux Ubuntu Cannot Print Large Images
  • Cannot Print PDF Solution and Howto Resize
  • Linux Console Login Screen TTY Change Message
  • Apache Cannot Start Listening Already on 0.0.0.0
  • MySQL Bash Query to pipe input directly without using heredoc trick
  • CentOS 6 and 7 / RHEL Persistent DHCP Solution
  • Debian Ubuntu Mint rc-local service startup error solution rc-local.service: Failed at step EXEC spawning /etc/rc.local: Exec format error
  • MySQL Cheatsheet Guide and Tutorial
  • bash script kill whois or other command that is running for too long
  • Linux tftp listens on all interfaces and IPs by DEFAULT Security Risk Hole Solution
  • python import docx error
  • Cisco Unified Communications Manager Express Cheatsheet CUCME CME
  • Linux Ubuntu Debian Missing privilege separation directory: /var/run/sshd
  • bash how to count the number of columns or words in a line
  • bash if statement how to test program output without assigning to variable
  • RTNETLINK answers: Network is unreachable
  • Centos 7 how to save iptables rules like Centos 6
  • nfs tuning maximum amount of connections
  • qemu-kvm error "Could not initialize SDL(No available video device) - exiting"
  • Centos 7 tftpd will not work with selinux enabled