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P-660HW-Tx v2 Series Support Notes
10. What is 802.11g?
802.11g is an extension to 802.11b. 802.11g increases 802.11b's data rates to
54 Mbps and still utilise the 2.4 GHz ISM. Modulation is based upon OFDM
(orthogonal frequency division multiplexing) technology. An 802.11b radio card
will interface directly with an 802.11g access point (and vice versa) at 11 Mbps
or lower depending on range. The range at 54 Mbps is less than for 802.11b
operating at 11 Mbps.
11. Is it possible to use products from a variety of vendors?
Yes. As long as the products comply to the same IEEE 802.11 standard. The
Wi-Fi logo is used to define 802.11b compatible products. Wi-Fi5 is a
compatibility standard for 802.11a products running in the 5GHz band.
12. What is Wi-Fi?
The Wi-Fi logo signifies that a product is interoperable with wireless
networking equipment from other vendors. A Wi-Fi logo product has been
tested and certified by the Wireless Ethernet Compatibility Alliance (WECA).
The Socket Wireless LAN Card is Wi-Fi certified, and that means that it will
work (interoperate) with any brand of Access Point that is also Wi-Fi certified.
13. What types of devices use the 2.4GHz Band?
Various spread spectrum radio communication applications use the 2.4 GHz
band. This includes WLAN systems (not necessarily of the type IEEE
802.11b), cordless phones, wireless medical telemetry equipment and
Bluetooth™ short-range wireless applications, which include connecting
printers to computers and connecting modems or hands-free kits to mobile
phones.
14. Does the 802.11 interfere with Bluetooth device?
Any time devices are operated in the same frequency band, there is the
potential for interference.
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 wall?
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
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All contents copyright © 2006 ZyXEL Communications Corporation.
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