Chapter 45 Troubleshooting
AX/DX/EX/PX Series User’s Guide
423
I cannot connect to the Internet using a cellular connection.
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 Check the signal strength. Look at the LEDs, and check the LED section for more information. If the signal
strength is low, try moving the Zyxel Device closer to the ISP’s base station if possible, and look around to
see if there are any devices that might be interfering with the wireless network (for example,
microwaves, other wireless networks, and so on).
3 For models that support external antennas, connect two external antennas to improve the cellular WAN
signal strength. Point the antennas to the base stations directions if you know where they are, or try
pointing the antennas in different directions and check which provides the strongest signal to the Zyxel
Device. See the Introduction chapter for more information.
4 Turn the Zyxel Device off and on.
5 If the problem continues, contact the network administrator or vendor, or try the advanced suggestions
in I cannot access the Web Configurator login screen..
Note: If your Zyxel Device is an outdoor-type, inclement weather like rain and hot weather
may affect cellular signals.
45.5 WiFi Problems
The WiFi connection is slow and intermittent.
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 WiFi devices.
To optimize the speed and quality of your WiFi connection, you can:
• Move your WiFi device closer to the AP if the signal strength is low.
• Reduce WiFi interference that may be caused by other WiFi networks or surrounding wireless
electronics such as cordless phones.
• Place the AP where there are minimum obstacles (such as walls and ceilings) between the AP and
the WiFi client.
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