Factory Reset Cisco 7940, 7960, 7941, and 7961 IP Phones

19. February 2014 Cisco VOIP 2

Here are the steps on how to reset a Cisco IP Phone to factory default.

You can follow these procedures, if: the IP phone is not booting properly, password recovery, firmware upgrade, if the IP phone has the speaker button on, but nothing displayed on the screen or blank screen display, and so on. When you execute a factory reset on the Cisco IP phone, take into consideration that Certificate Trust List (CTL file), Locally Significant Certificate (LSC file), Call Histories and phone applications will be erased; local information, user configuration settings, and network configuration will be reset to default values.

Also, there are few requirements that are essential before you start factory reset.

You should have a valid TFTP server and DHCP to provide the phone with an IP address (DHCP option 150) and phone firmware depending on the phone model. See example.

Factory reset on Cisco 7940, 7960 IP Phones.

  1. Unplug the power cable from the phone, and then plug it back in again.
  2. Right away, press and hold # and while the Headset, Mute, and Speaker buttons begin to flash in sequence, release #.
  3. Press 123456789*0# after the Headset, Mute, and Speaker buttons begin to flash. You have 60 seconds to complete the key sequence, after that the phone does not reset and will continue with its normal startup.
  4. If you enter this key sequence correctly, the phone will display this prompt: Keep network cfg? 1 = yes 2 = no
  5. Pressing 1 it will preserve the current network configuration settings, and while pressing 2 the phone will go through the factory reset procedure.

Factory reset on Cisco 7941, 7961 IP Phones.

  1. Unplug the power cable from the phone, and then plug it back in again.
  2. Immediately press and hold # and while the line lights buttons will begin to flash in sequence, release #.
  3. Press 123456789*0# after the line lights buttons begin to flash. You have 60 seconds to complete the key sequence, after that the phone does not reset and will continues with its normal startup.
  4. After the correct key sequence is entered, the IP phone begins its reset process and will display the following prompt “Upgrading”

Example: Factory reset and uploading firmware with TFTPD32 software.

  1. Download tftpd32 and install it to your computer (there is a 64bit version for windows 7, 8, run it as administrator) Download tftpd32
  2. Add a static IP address to the computer ex IP 192.168.1.1 Mask 255.255.255.0
  3. Run the software, and go to settings.
  4. Start TFTP and DHCP server services from the global tab.
  5. Set TFTP directory at the TFTP tab.
  6. At the DHCP tab set the following: IP pool starting address to 192.168.1.1 Size of pool 5 (could be just two) Default router 192.168.1.1 Mask 255.255.255.0 Additional Option 150
  7. Download the phone firmware files into TFTP directory.
  8. Reset the phone to factory default (one of the above options).
  9. Connect the phone to the computer.
  10. Power cycle the phone.
  11. At the DHCP server window, you will see the IP address allocation: 192.168.1.1 computer (TFTP server) and next IP address allocated to the phone 192.168.1.2.
  12. The phone should start transferring the new firmware that you put into the TFTP directory (you can see it on the phone screen or the TFTP log viewer).
  13. If the phone is not working like it should be, look at the TFTP logs to watch what files the phone is trying to download
  14. Make sure you have the right firmware, depending on the phone model.
  15. If it is still not working, remove all the firmware (reset), and try a different one, a lower firmware release.

Factory reset alternatives codes:

Soft reset (delete all files) 123456789*0# Hard reset (format flash) 3491672850*# Network preservation hard reset (format flash; network settings are preserved in RAM only if you don’t remove the power cable from the phone during the reset process) 3491672850*#


2 thoughts on “Factory Reset Cisco 7940, 7960, 7941, and 7961 IP Phones”

  • 1
    Mark on February 23, 2014 Reply

    Thanks. Ran into this issue. We purchased a few used 7961’s. They wouldn’t connect to our call manager. Factory defaulted them and they worked great!!

  • 2
    Steve on February 10, 2016 Reply

    Here a video showing the Factory Image reset in real time using the 3491672850*# procedure.
    https://youtu.be/wCIQg_PIyPE

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