ZyXEL nbg-4615 Guida Utente

Chapter 29 Troubleshooting

NBG4615 User’s Guide

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:

• Move your wireless device closer to the AP if the signal strength is low.
• Reduce wireless interference that may be caused by other wireless 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 wireless client. 

• Reduce the number of wireless clients connecting to the same AP 

simultaneously, or add additional APs if necessary.

• Try closing some programs that use the Internet, especially peer-to-peer 

applications. If the wireless client is sending or receiving a lot of information, it 

may have too many programs open that use the Internet. 

• Position the antennas for best reception. If the AP is placed on a table or floor, 

point the antennas upwards. If the AP is placed at a high position, point the 

antennas downwards. Try pointing the antennas in different directions and 

check which provides the strongest signal to the wireless clients. 

I cannot access or see a USB device that is connected to the NBG4615.

Disconnect the problematic USB device, then reconnect it to the NBG4615.

Ensure that the USB device in question has power.

Check your cable connections.

Restart the NBG4615 by disconnecting the power and then reconnecting it.