ZyXEL Communications P-334WT Technical Information download pdf (Page 46)

Both the 802.11b and Bluetooth devices occupy the same2.4-to-2.483-GHz unlicensed frequency range-

the same band. But a Bluetooth device would not interfere with other 802.11 devices much more than

another 802.11 device would interefere. 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.

15. 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 a 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 amount of metal re-enforcement used.

16. What are potential factors that may causes interference among WLAN products ?

Factors of interference:

1. Obstacles: walls, ceilings, furniture… etc.

2. Building Materials: metal door, aluminum studs.

3. Electrical devices: microwaves, monitors, electric motors.

Solution :

1.Minimizing the number of walls and ceilings

2.Antenna is positioned for best reception

3.Keep WLAN products away from electrical devices, eg: microwaves, monitors, electric motors,…, etc.

4. Add additional APs if necessary.

17. What's 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 owned by a service provider or carrier. Data rates are low

and charges are based on usage. Specialized applications are characteristically designed around short,

burst messaging.

Advanced FAQ

1. What is Ad Hoc mode ?

A wireless network consists of a number of stations without access points. Without using an access point

or any connection to a wired network.

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ZyXEL Communications P-334WT Technical Information Page 46