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ZyXEL – SBG Support Notes
What is 802.11n?
802.11n supports frequencies in both 2.4 GHz and 5 GHz radio bands and
its data rate ranges from 54 Mbit/s up to 600 Mbit/s in theory, using the
802.11n Channel Doubling technology which can double the channel
bandwidth from 20 MHz to 40 MHz and effectively doubles data rates and
throughput. It adds the MIMO feature, which utilizes multiple transmission
and reception antennas to allow higher raw data rate, and resolves more
information than possible using a single antenna configuration. 802.11n
also uses the ―Alamouti coding‖ coding scheme to increase transmission
range.
Is it possible to use products from a variety of vendors?
Yes, as long as the products comply with the same IEEE 802.11 standard.
The Wi-Fi logo is used to define 802.11 compatible products.
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). If a Wireless LAN Card is Wi-Fi certified, that means that it will
work (interoperate) with any brand of Access Point that is also Wi-Fi
certified.
What types of devices use the 2.4 GHz 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 includes connecting
printers to computers and connecting modems or hands-free kits to mobile
phones.
Does the 802.11 interfere with Bluetooth devices?
Any time devices are operated in the same frequency band, there is a
potential for interference.
Both the 802.11b and Bluetooth devices occupy the same 2.4-to-2.483
GHz unlicensed frequency range-the same band. But a Bluetooth device
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