there is a sign at mount auburn hospital

there is a small room at mount auburn hospital that has a big sign on
it - in the interior of the bld - near some elevators - not on the top
floor - not on a below ground floor - its a big red sign with big
white letters - it says - "CAMBRIDGE FIRE BDA"

which is curious - why doesnt it just say CAMBRIDGE BDA ?

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note - mt auburn hospital is quiet - very few announcements from
overhead speakers - maybe once a week or once a day - no chimes - etc

valets and security all have portable radios - they are squawky
sometimes - valets dont have speaker mikes - valets also do traffic
control at the main entrance which can be like grand central station
at times

note - cambridge massachusetts

note - valets and security are apparently operating on comirs per feed
at openmhz - maybe that is part of the deal with the bda - the
hospital also has 451.35R iirc - we should take a portable over there
and listen on 456.35 to see what we can hear and feel