ZyXEL Communications LTE5121, User Manual

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Chapter 28 Troubleshooting
LTE-5121 User’s Guide
219
4
Reset the device to its factory defaults, and try to access the LTE Device with the default IP
address. See
Section 1.8 on page 19 .
5
If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
Advanced Suggestions
• Try to access the LTE Device using another service, such as Telnet. If you can access the LTE
Device, check the remote management settings and firewall rules to find out why the LTE Device
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 ETHERNET port.
I can see the Login screen, but I cannot log in to the LTE Device.
1
Make sure you have entered the user name and password correctly. The default user name is
admin. These fields are case-sensitive, so make sure [Caps Lock] is not on.
2
You cannot log in to the web configurator while someone is using Telnet to access the LTE Device.
Log out of the LTE Device in the other session, or ask the person who is logged in to log out.
3
Turn the LTE Device off and on.
4
If this does not work, you have to reset the device to its factory defaults. See Section 28.2 on page
217 .
I cannot Telnet to the LTE Device.
See the troubleshooting suggestions for I cannot see or access the Login screen in the web
configurator. Ignore the suggestions about your browser.
I cannot use FTP to upload / download the configuration file. / I cannot use FTP to upload
new firmware.
See the troubleshooting suggestions for I cannot see or access the Login screen in the web
configurator. Ignore the suggestions about your browser.