3Com AirConnect 9550, Руководство пользователя

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10 Key Product Features
The higher spectrum provides about 50m (164ft) of coverage.
Consider 802.11a when you need high throughput in a confined
space and you are:
■
Running high-bandwidth applications like voice, video, or
multimedia over a wireless network that can benefit from a
five-fold increase in data throughput.
■
Transferring large files like computer-aided design files,
preprint publishing documents or graphics files, such as MRI
scans for medical applications that demand additional
bandwidth.
■
Supporting a dense user base confined to a small coverage
area. Because 802.11a has a greater number of
non-overlapping channels, you can pack more wireless
devices in a tighter space.
802.11b/g
802.11b, 802.11g and 802.11n all operate in the 2.4GHz band.
802.11b can support data rate up to 11Mbps. 802.11g can
support data rate up to 54Mbps. 802.11n can support data rate
up to 300Mbps.They all support the widest coverage – up to
100m (328ft). It is however, subject to a greater risk of radio
interference because it operates in the more popular 2.4GHz
band.
Consider 802.11n when you need wider coverage and vendor
compatibility and you are: