ZyXEL Communications P-660HNU-Fx User Manual

 Chapter 1 Introduction

ADSL Series User’s Guide

Do the following things regularly to make the ZyXEL Device more secure and to manage the ZyXEL 
Device more effectively.

• Change the password. Use a password that’s not easy to guess and that consists of different 

types of characters, such as numbers and letters.

• Write down the password and put it in a safe place.
• Back up the configuration (and make sure you know how to restore it). Restoring an earlier 

working configuration may be useful if the device becomes unstable or even crashes. If you 
forget your password, you will have to reset the ZyXEL Device to its factory default settings. If 
you backed up an earlier configuration file, you would not have to totally re-configure the ZyXEL 
Device. You could simply restore your last configuration.

Refer to the Quick Start Guide for information on hardware connections. 

If you forget your password or cannot access the web configurator, you will need to use the RESET 
button at the back of the device to reload the factory-default configuration file. This means that you 
will lose all configurations that you had previously and the passwords will be reset to the defaults. 

Make sure the POWER LED is on (not blinking).

To set the device back to the factory default settings, press the RESET button for 5 seconds or until 
the POWER LED begins to blink and then release it. When the POWER LED begins to blink, the 
defaults have been restored and the device restarts.