Chapter 43 Troubleshooting
VMG/XMG Series User’s Guide
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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
LAN screen to have the clients get WAN IP addresses directly from your ISP’s DHCP server.
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.
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.
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 Figure 19 on page 30.
3 Turn the Zyxel Device off and on.
4 If the problem continues, contact your vendor.
43.4 Wireless Internet Access
What factors may cause intermittent or unstabled wireless connection? How can I solve this
problem?
The following factors may cause interference:
• Obstacles: walls, ceilings, furniture, and so on.
• Building Materials: metal doors, aluminum studs.
• Electrical devices: microwaves, monitors, electric motors, cordless phones, and other wireless devices.
To optimize the speed and quality of your wireless connection, you can:
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