ZyXEL Communications P-793H User Manual

 Chapter 38 Troubleshooting

P-793H User’s Guide

6 If the problem continues, contact the network administrator or vendor, or try the 

advanced suggestion.

• Try to access the ZyXEL Device using another service, such as Telnet. If you can access 

the ZyXEL Device, check the remote management settings, firewall rules, and SMT filters 
to find out why the ZyXEL Device does not respond to HTTP. See 

.

V

I can see the Login screen, but I cannot log in to the ZyXEL Device.

1 Make sure you have entered the password correctly. The default password is 1234. This 

field is case-sensitive, so make sure [Caps Lock] is not on. 

2 You cannot log in to the web configurator while someone is using the SMT, Telnet, or 

the console port to access the ZyXEL Device. Log out of the ZyXEL Device in the other 
session, or ask the person who is logged in to log out. 

3 Turn the ZyXEL Device off and on. 
4 If this does not work, you have to reset the device to its factory defaults. See 

.

V

I cannot access the SMT. / I cannot Telnet to the ZyXEL Device.

See the troubleshooting suggestions for 

 Ignore the suggestions about your browser.

V

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.

V

I cannot use TR-069/CNM Access to manage the ZyXEL Device.

1 Make sure that the ZyXEL Device has TR-069 management enabled and that the correct 

management server IP address is configured. See 

.

2 Make sure that your firewall and NAT port forwarding rules are set up to allow traffic 

from the management server to get to the ZyXEL Device. See the documentation for 
your management server.