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General
Chapter 1
UNIT OVERVIEW
The ADTRAN OCU 45 offers transport of T3/E3/STS-1 services over a
fiber transport up to distances of 40 km in the single-mode version and 2 km
in the multi-mode version. Measuring only one rack unit high, the OCU 45
can be used stand-alone, wall mounted, or mounted in 19 or 23-inch shelves
using an optional mounting tray. This compact device gives NSPs a conve-
nient way to extend T3/E3/STS-1 services from their point of presence to
their customer and provides Enterprise users a powerful tool for extending
T3/E3/STS-1 services over fiber in a campus environment.
Configuration of the OCU 45 is accomplished through two switches on the
front of the unit which configure the metallic interface to T3, E3 or STS-1
and set the metallic line length to short or long. The OCU 45 has both nor-
mally-open and normally-closed alarm relay contacts with a front panel
Alarm Cutoff Switch (ACO).
Diagnostics include metallic and optical loopbacks, initiated via a front
panel switch. Three LEDs are located on the front panel to monitor the sta-
tus of both the metallic and optical interfaces.
The OCU 45 is powered from a -48V source. An optional AC to -48Vdc
converter is available to allow the unit to be AC powered.
61200664L1-1B
OCU 45 User Manual
17
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