Radio frequency rules vary all over the world. It is important to comply
with any local, regional, and national laws that apply to the installation. In
the United States, the FCC has jurisdiction. For most of Europe, the ETSI makes
the laws that affect wireless equipment. Some of these rules are shown in
Figures
and
.
As an
example of how the rules affect antenna setup, the U.S. FCC rules state that
any device that supports UNII-1 channels one through four is limited to a fixed
antenna. Therefore, the Cisco Aironet 1200 802.11a access point, shown in
Figure
, has a flip
antenna. Even though it is not legal to replace the antenna, a variety of
applications can be served.