For Volume
decades,
BEI Communications has been pro-
23
viding fiber-optic based solutions, delivering the
technology and support for prisons, nuclear pow-
er facilities, international borders, pipe lines and
other high-value assets.
accurate to within ±15 meters.
May 2018 Edition
Should the fiber become cut or damaged, the sys-
tem controller automatically converts to Optical
Time Domain Reflectometer technology and will
continue to provide detection on the undamaged
Fiber-optic technology is tried and true with portion of fiber.
several clients using systems that are decades Additionally, the system is able to store the sound cre-
old!
ated by the event that triggered the alarm.
The problem is the cost involved in providing ex- The attenuation of the fiber-optic signal effectively
tended lengths of protection divided into zones that
modulates the signal which the system is able to
accommodate a targeted response.
save as a sound file.
Until recently, only governmental agencies could afford to
Having such data available will prove invalu-
protect perimeters in excess of 1 or 2 kilometers.
The engineers at BEI Communi-
cations have developed a new, fi-
ber-optic based technology which
accommodates the protection of
great distances at a fraction of the
cost of other technologies.
able to the end user.
RLTDR
Reflected Light Time Differential /
Optical Time Domain Reflectometer
(RLTDR) uses two, solid-state lasers
which inject signals into each end of
a proprietary, tactical fiber up to 100
kilometers in length.
Under normal operations, the system con-
troller defaults to Reflected Light Time Dif-
ferential where any external affectation on
the fiber will produce attenuation which is
parsed by the system controller then ana-
lyzed by a pc-based program which filters-out
false alarms and then provides a graphical
representation of the location of the alarm,
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