ZyXEL LTE5121 User Guide - Page 219
I cannot Telnet to the LTE Device.
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Chapter 28 Troubleshooting 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. LTE-5121 User's Guide 219