Internet Problems
I cannot access the Internet.
1 Check the hardware connections and make sure the LEDs are behaving as expected. See the Quick Start Guide.
2 Make sure you entered your ISP account information correctly on the Network Setting > Broadband screen. Fields on this screen are case-sensitive, so check if [Caps Lock] is on of off.
3 If you are trying to access the Internet wirelessly, make sure that you enabled the WiFi in the Zyxel Device and your WiFi client and that the WiFi settings in the WiFi client are the same as the settings in the Zyxel Device.
4 Disconnect all the cables from your Zyxel Device and reconnect them.
5 If the problem continues, contact your ISP.
I cannot connect to the Internet using an Ethernet connection.
1 Make sure you have the Ethernet WAN port connected to a Modem or Router.
2 Make sure you configured a proper Ethernet WAN interface (Network Setting > Broadband screen) with the Internet account information provided by your ISP and that it is enabled.
3 Check that the WAN interface you are connected to is in the same interface group as the Ethernet connection (Network Setting > Interface Group).
4 If you set up a WAN connection using bridging service, make sure you turn off the DHCP feature in the Network Setting > Home Networking > LAN Setup screen to have the clients get WAN IP addresses directly from your ISP’s DHCP server.
I cannot connect to the Internet using a Fiber connection.
1 Make sure the Fiber/SFP port has a compatible SFP/SFP+ transceiver installed with a fiber/Ethernet cable connected to it.
2 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick Start Guide.
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.
The LOS LED is red if the GPON Device is not receiving an optical signal.
The LOS LED blinks red if the GPON Device is receiving a weak optical signal.
3 Disconnect all the cables from your device and reconnect them. Make sure the fiber cable is not curved too much.
4 If that does not work, restart your Zyxel Device.
5 If the problems continues, contact your ISP.
I cannot connect to the Internet using a cellular connection.
1 The DSL and Ethernet connections have priority in that order. If the DSL or Ethernet connection is up, then the cellular connection will be down.
2 Make sure you have connected a compatible cellular dongle to the USB port, if required.
3 Make sure you have configured Network Setting > Broadband > Cellular Backup correctly.
4 Check that the Zyxel Device is within range of a cellular base station.
The Internet connection is slow or intermittent.
1 There might be a lot of traffic on the network. If the Zyxel Device is sending or receiving a lot of information, try closing some programs that use the Internet, especially peer-to-peer applications.
2 If your Zyxel Device keeps alternating between ISPs, then choose a fixed ISP. Go to the Network Setting > Cellular PLMN screen, disable PLMN Auto Selection and then choose your preferred ISP.
3 Turn the Zyxel Device off and on.
4 If the problem continues, contact the network administrator or vendor, or try the advanced suggestions in I cannot access the Web Configurator login screen.
*If your Zyxel Device is an outdoor-type, inclement weather like rain and hot weather may affect cellular signals.