Cisco 7942 keeps rebooting after factory reset

That depends upon the brand of the router. It would be wise to google for the particular brand.

There often are software means to perform a reset but here are the hardware means.

For Netgear:

1. Press and hold the Wireless On/Off and WPS buttons until the Power LED blinks red (about 6 seconds).
2. Release the Wireless On/Off and WPS buttons and wait for the router to reboot.

For Linksys:

1. Press the red reset button on the back.
2. Unplug it from power for 30 seconds. Plug the power back in.

For Belkin:

1. Find the reset button (depends on the model).
2. Depress the reset button for 15 seconds.
3. Wait one minute for the router to restart.

Here is a tutorial for Cisco routers:

http://www.networkworld.com/article/2343961/cisco-subnet/how-to-reset-a-cisco-router-to-factory-default--removing-the-startup-configuration-file.html

Here is one for TP-Link:

http://www.tp-link.us/article/?faqid=496

For D-Link:

Push a paperclip into the hole marked reset on the back and keep it depressed for 10 seconds.

The default user name is usually admin and there is no password (password is blank).

When performing the factory reset procedure we are about to describe, it is important to keep in mind that the IP phone will lose all configuration files and phone applications. This means that it is necessary to have CallManager or CallManager Express setup so that the IP phone will be able to receive the new information (phone application and configuration) after the reset procedure is complete, otherwise it is most likely that the IP phone will not be usable until this information is loaded on to it.
This preparation also happens to be the procedure for upgrading a Cisco IP phone firmware.



Follow the steps below to successfully factory reset your Cisco 7942, 7962 IP phone:

1. Unplug the power cable from the phone and then plug it back in. The phone begins its power up cycle.
2. While the phone is powering up, and before the Speaker button flashes on and off, press and hold #. Continue to hold # until each line button flashes on and off in sequence in amber.
3. Release # and press 123456789*0#.

You can press a key twice in a row, but if you press the keys out of sequence, the factory reset will not take place.
After you press these keys, the line buttons on the phone flash red and 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.

Duplicate question. See other post for clarification.

According to Cisco, when initiating a factory reset procedure certain information from the IP phone is erased while other information is reset to the factory default value, as shown in the list below:


Information Erased:

• CTL File (Certificate Trust List)
• LSC File (Locally Significant Certificate)
• IP Phone Call History (Calls Received, Placed, Missed etc)
• Phone application

Information Reset to Default:

• User configuration settings (ring tone, screen brightness, sound levels etc)
• Network configuration settings

t is highly advisable to follow the firmware upgrade procedure in a non-working environment to ensure other phones are not affected (in case of an accidental reboot), and to avoid the freshly factory reset ip phones obtaining the working environment's settings.


Please use the link below and follow the instruction http://www.firewall.cx/downloads/cisco-tools-a-applications/cisco-ip-phone-a-ata-firmware-downloads.html

If you used the traditional keypress sequence where you hold down the * key, reboot the phone, and then press the keys in sequence, you may be stuck in a boot loop. You might need to connect your phone to a network if your phone is trying to reach a TFTP server to fetch a firmware or config file update. If you need a power supply, you might try CiscoPowerCube.com they sell a cross compatible version of the CP-PWR-CUBE3 which includes the cord.

You will see a reset button at the back of your router then keep holding for 10 second then unplug the power jack for 1 min.

If you have the password logon and type wr erase and reboot.

 

http://www.cisco.com/en/US/products/hw/switches/ps607/products_tech_note09186a00800c4546.shtml

 

 

7942
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I have found this on the cisco site.
http://www.cisco.com/en/US/prod/collateral/voicesw/ps6788/phones/ps379/ps8535/product_data_sheet0900aecd8069bb68.html

by reset, do you mean reboot? if so type reload

if resetting to factory type erase startup-config