ZyXEL Communications Corporation EMG2881-T20A Manuel D’Utilisation

Chapter 12 Troubleshooting

EMG2881-T20A User’s Guide

Reset the device to its factory defaults, and try to access the EMG2881-T20A with the default IP address. 
See 

If the problem continues, contact the network administrator or vendor, or try one of the advanced 
suggestions.

• Try to access the EMG2881-T20A using another service, such as Telnet. If you can access the 

EMG2881-T20A, check the remote management settings and firewall rules to find out why the 

EMG2881-T20A does not respond to HTTP.

• If your computer is connected to the WAN port or is connected wirelessly, use a computer that is 

connected to a LAN/ETHERNET port.

I can see the Login screen, but I cannot log in to the EMG2881-T20A.

Make sure you have entered the password correctly. The default password is the factory default (see 
the device label). This field is case-sensitive, so make sure [Caps Lock] is not on. 

This can happen when you fail to log out properly from your last session. Try logging in again after 10 
minutes.

Disconnect and re-connect the power adaptor or cord to the EMG2881-T20A. 

If this does not work, you have to reset the device to its factory defaults. See 

.

I cannot access the Internet.

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

Make sure the WAN port is connected to a broadband modem or router with Internet access. Your 
computer and the EMG2881-T20A should be in the same subnet.

Make sure you entered your ISP account information correctly in the wizard or the WAN screen. 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.

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

If the problem continues, contact your ISP.