The 900
MHz frequency is used for many wireless applications. Such applications include
cordless phones,
pagers,
cell phones, and
wireless networking.
This frequency is used for said
applications, because it has a better ability to carry through objects and longer distances (See
wave length) when compared to frequencies
previously implemented. Such frequencies include 46 MHz and 47 MHz. 900 MHz
devices are more commonly
digital, with the exception of
residential cordless
phones, most of which are
analog (Digital residential cordless phones at 900 MHz tend
distort cell phone
signals).
Each device has a specific frequency it works on (IE: A pager at 929.9854 MHz). Someone listening on said frequencies(if they have
knowledge of them, which can be found on the back of many of the devices, or in the battery compartment) can intercept and/or jam
attempted communications.
L0pht was seen doing this on
television during an
interview of them, which took place inside their
mysterious urban legend-style
lab.
Control of
radio frequency allocation is done in the United States by the
Federal Communication Commission (http://www.fcc.gov). Frequencies which are expected to be popular in the future include 2.4
GHz.