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ZyXEL – SBG Support Notes
would not interfere with other 802.11 devices much more than another
802.11 device would interfere. While more collisions are possible with the
introduction of a Bluetooth device, they are also possible with the
introduction of another 802.11 device, or a new 2.4 GHz cordless phone for
that matter. But, Bluetooth devices are usually low-power, so the effects
that a Bluetooth device may have on an 802.11 network, if any, aren't
far-reaching.
Can radio signals pass through walls?
Transmitting through a wall is possible depending upon the material used
in its construction. In general, metals and substances with high water
content do not allow radio waves to pass through. Metals reflect radio
waves and concrete attenuates radio waves. The amount of attenuation
suffered in passing through concrete will be a function of its thickness and
the amount of metal reinforcement used.
What are potential factors that may cause interference for WLAN
products?
Factors of interference:
1. Obstacles: walls, ceilings, furniture, etc.
2. Building Materials: metal doors, aluminum studs.
3. Electrical devices: microwaves, monitors, electric motors.
Solution:
1. Minimize the number of walls and ceilings between clients and APs.
2. Position Antennas for best reception.
3. Keep WLAN products away from electrical devices, e.g.: microwaves,
monitors, electric motors, etc.
4. Add additional APs if necessary.
What is the difference between a WLAN and a WWAN?
WLANs are generally privately owned, wireless systems that are deployed
in a corporation, warehouse, hospital, or educational campus setting. Data
rates are high and there are no per-packet charges for data transmission.
WWANs are generally publicly shared data networks designed to provide
coverage in metropolitan areas and along traffic corridors. WWANs are
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