Cisco IP Phone How To Reset To Factory Settings Instructions CP 9971, 8800, 8900, 8845, 8851, 8841, 8831, 7961, 7960, 7945, 7942, 7941, 7940.

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.  This applies even if you are trying to migrate the phone to another platform such as Asterisk/FreePBX etc...

This guide applies to nearly all of the Cisco IP phones that you would use in CME or CUCM from several years ago including models: 9900, 9971, 8800, 8900, 8845, 8851, 8841, 8831, 7961, 7960, 7945, 7942, 7941, 7940.

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

  • Apache PHP sending expires header solution cannot use cache with CDN
  • How to install virt-manager in Mint 22/Ubuntu 22
  • Infiniband Guide
  • python mysql install error: /bin/sh: 1: mysql_config: not found /bin/sh: 1: mariadb_config: not found /bin/sh: 1: mysql_config: not found mysql_config --version
  • FreePBX 17 How To Add a Trunk
  • Docker Container Onboot Policy - How to make sure a container is always running
  • FreePBX 17 How To Add Phones / Extensions and Register
  • Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes. solution
  • Cisco How To Use a Third Party SIP Phone (eg. Avaya, 3CX)
  • Cisco Unified Communication Manager (CUCM) - How To Add Phones
  • pptp / pptpd not working in DD-WRT iptables / router
  • systemd-journald high memory usage solution
  • How to Install FreePBX 17 in Linux Debian Ubuntu Mint Guide
  • How To Install Cisco's CUCM (Cisco Unified Communication Manager) 12 Guide
  • Linux Ubuntu Redhat How To Extract Images from PDF
  • Linux and Windows Dual Boot Issue NIC Won't work After Booting Windows
  • Cisco CME How To Enable ACD hunt groups
  • How to install gns3 on Linux Ubuntu Mint
  • How to convert audio for Asterisk .wav format
  • Using Cisco CME Router with Asterisk as a dial-peer