Plenum Locations
Because wireless
systems need to be placed where the users are, and not necessarily in some
wiring or computer closet (like routers and switches), mounting becomes an
issue. You will learn about different mounting and locations in Chapter 12, "Installing WLAN Products," but this
section briefly discusses some special regulations that can affect locations of
devices.
Many areas in buildings are considered plenum locations, which means these areas are used for
air handling. In many buildings, areas such as those above ceiling panels, below
raised floors, or in wiring risers between floors are used as part of the air
system and require products to be plenum rated. In the United States, the UL2043
certification provides for testing that is similar to most local fire-code
requirements.
Although many APs are designed to be placed in plenum areas,
many are not. Make sure you select a product that meets the location needs of
your installation. Also keep in mind that any cables and antennas that are
placed or run through these areas must meet the local plenum codes.
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