InBuilding - Volume 2, Issue 1 - 20

in the previous issue discussed
the role of the authority having
jurisdiction (AHJ) in properly adhering to your municipality's fire
safety codes. In most scenarios,
the AHJ is typically the municipal
fire department. The AHJ will inform you of the frequencies used.
Some AHJs will tell you multiple
bands are used by different departments. For example, our firm
worked on a project that had two
different VHF channels for fire
and EMS, and two UHF channels for police. The client needed
four BDAs just to comply with all
necessary requirements for each
emergency response team.
Different frequency bands need
different equipment, which has a
direct impact on cost. BDAs can
cost anywhere between $8,000
and $20,000 depending on their
complexity. And this price does
not include extra costs regarding
physical separation, antennas,
lines, filters or installation. This
project went up to six figures in
order to meet AHJ requirements.
Multiple bands oftentimes mean
multiple equipment configurations,
which multiplies capital requirements. The real issue here is not
understanding all applicable bands
before designing your system and
ordering equipment.
Finding out you need different
equipment after the fact oftentimes
doubles costs. Unorganized AHJs
will often ask "for the moon" just
to be safe. Some will ask for as
many as 16 channels. This can
unnecessarily drive up costs for no
valid reason.
Also, many municipalities
are now transitioning to newer
frequency bands released by the
FCC. 700 MHz, for example, is
20 inbuilding-magazine.com Volume 2, Issue 1


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Table of Contents for the Digital Edition of InBuilding - Volume 2, Issue 1

Contents
InBuilding - Volume 2, Issue 1 - Cover1
InBuilding - Volume 2, Issue 1 - Cover2
InBuilding - Volume 2, Issue 1 - 1
InBuilding - Volume 2, Issue 1 - Contents
InBuilding - Volume 2, Issue 1 - 3
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