Chapter 13 Troubleshooting
PM7516-R0 / PM7116-R0 User’s Guide
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2 Turn the Zyxel Device off and on.
3 If this does not work, you have to reset the device to its factory defaults. See Section 13.1 on page 37.
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.
13.3 Internet Access
I cannot access the Internet.
1 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide and Section 1.4.1 on page 9.
The PON LED is off if the optical transceiver has malfunctioned or the fiber cable is not connected or is
broken or damaged enough to break the PON connection.
See Section 1.4.1 on page 9 for details about the other LEDs.
2 Disconnect the power, LAN, and phone cables from your device and reconnect them.
3 If the problem continues, contact your ISP.
I cannot access the Zyxel Device anymore. I had access to the Zyxel Device, but my connection
is not available anymore.
1 Your session with the Zyxel Device may have expired. Try logging into the Zyxel Device again.
2 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick
Start Guide and Section 1.4.1 on page 9.
3 Turn the Zyxel Device off and on.
4 If the problem continues, contact your vendor.
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