Watchguard Firebox SOHO 6 Wireless User Manual page 29

Wireless
Wireless operating range--indoors (these values are
approximations):
100 feet at 11 Mbps
165 feet at 5.5 Mbps
230 feet at 2 Mbps
300 feet at 1 Mbps
Understanding IEEE 802.11b Wireless
Communication
In general, transmitted RF power and signal bandwidth place an
upper limit on the rate that data can be transmitted over a wireless
link. The basic equation to determines the maximum data rate is:
Channel Capacity =
Channel Bandwidth x Log2(1 + Signal Strength/Noise Level
This equation says the maximum amount of data (bits/s) that can
be transmitted over a given channel depends on:
• The Channel Bandwidth: (22Mbits/s) for 802.11b
• The Signal Strength: (15dBm transmitted) for Soho6 Wireless
• The Noise Level: Depends on the channel environment and
the receiver design.
Data rate cannot exceed channel capacity. Channel capacity
depends on signal strength, noise, and transmitted power.
User Guide
SOHO 6 Wireless hardware description
7