ZyXEL Communications P-660HN-T1H User Manual

Chapter 23 Troubleshooting

P-660HN-T1H User’s Guide

I cannot use FTP to upload / download the configuration file. / I cannot use FTP to 
upload new firmware.

See the troubleshooting suggestions for 

 Ignore the suggestions about your browser.

I cannot access the Internet.

Check the hardware connections, and make sure the LEDs are behaving as 
expected. See the Quick Start Guide and 

Make sure you entered your ISP account information correctly in the wizard. These 
fields are case-sensitive, so make sure [Caps Lock] is not on. 

If you are trying to access the Internet wirelessly, make sure the wireless settings 
in the wireless client are the same as the settings in the AP.

If you are trying to access the Internet wirelessly, make sure you have enabled 
the wireless LAN by the WPS/WLAN button or by the Wireless LAN > AP 
screen.

Disconnect all the cables from your device, and follow the directions in the Quick 
Start Guide again. 

If the problem continues, contact your ISP. 

I cannot access the Internet anymore. I had access to the Internet (with the ZyXEL 
Device), but my Internet connection is not available anymore.

Check the hardware connections, and make sure the LEDs are behaving as 
expected. See the Quick Start Guide and 

Turn the ZyXEL Device off and on.

If the problem continues, contact your ISP.