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Chapter 1: Introduction to Wireless Networking Concepts 11

900 MHz

The 900-MHz band starts at 902 MHz and goes to 928 MHz. This frequency range is

likely the most familiar to you because you probably had a cordless phone that operated

in this range. This is a good way to understand what wireless channels are. You might have

picked up your cordless phone only to hear a lot of static or even a neighbor on his cord-

less phone. If this happened, you could press the Channel button to switch to a channel

that did not have as much interference. When you found a clear channel, you could make

your call. The channel you were changing to was simply a different range of frequencies.

This way, even though both your phone and your neighbor’s were operating in the 900-

MHz range, you could select a channel in that range and have more than one device oper-

ating at the same time.