User Manual
ADCP-75-110 • Issue B • March 2001
Page 11
©
2001,
ADC
Telecommunications,
Inc.
1.4.4 Optical and Electrical Interface Connections
Operation
of
the
DRUs
and
DEUs
is
supported
by
six
optical
and
six
electrical
ports.
Each
optical
and
electrical
interface
connection
includes
a
status
LED,
a
duplex
LC
type
optical
adapter,
an
RJ-
45
DC
power
jack,
and
a
port
enable/disable
switch.
An
optical
port
may
be
connected
to
a
DRU,
a
DEU,
or
not
used.
An
electrical
port
may
be
connected
to
a
DRU
or
not
used.
Unused
ports
require
no
connections
at
all
and
are
disabled
via
the
corresponding
port
enable/disable
switch.
When
disabled,
the
port
LED
is
off,
the
alarm
reporting
function
is
disabled,
the
laser
is
off,
and
the
DC
power
is
off.
Enabling
the
enable/disable
switch
activates
all
functions.
1.4.5 Powering
The
DEU
is
powered
by
120–240
VAC
(50–60
Hz)
power
which
is
supplied
through
a
standard
three-conductor
AC
power
cord.
The
power
cord
is
provided
with
the
DEU
and
is
2.5
meters
(98
inches)
long.
A
resetable
circuit
breaker/On-Off
switch
is
provided
at
the
unit
front
panel.
The
switch
applies
power
to
the
DEU
internal
power
supply.
1.4.6 Cooling
Continuous
air
flow
for
cooling
is
provided
by
dual
cooling
fans
mounted
on
the
right
side
of
the
sheet
metal
housing.
A
minimum
of
3
inches
of
clearance
space
must
be
provided
on
both
the
left
and
right
sides
of
the
DEU
for
air
intake
and
exhaust.
An
alarm
is
provided
that
indicates
if
a
high
temperature
condition
occurs.
The
cooling
fans
may
be
field-replaced
if
either
unit
fails.
1.4.7 User Interface
The
DEU
user
interface
consists
of
the
various
connectors,
switches,
and
LEDs
that
are
provided
on
the
DEU
front
panel.
The
DEU
user
interface
points
are
indicated
in
Figure
7
and
described
in
Table
3.
Fig 7B-A
(2) AC POWER
ON/OFF SWITCH
(3) OPTICAL PORT
LED INDICATOR
(6 PLACES)
(4) OPT/ELEC PORT
ENABLE/DISABLE
SWITCH (6 PLACES)
(7) UNIT LED
INDICATOR
(1) AC POWER CORD
CONNECTOR
(5) ELECTRICAL PORT
DC POWER JACK
(6 PLACES)
(6) OPTICAL PORT
OPTICAL ADAPTERS
TX-LEFT - RX-RIGHT
(6 PLACES)
(8) HOST PORT
LED
INDICATOR
(7) HOST PORT
OPTICAL ADAPTERS
TX-LEFT - RX-RIGHT
NOTE: SHOWN WITHOUT
CABLE MANAGEMENT TRAY
Figure 7. Digital Expansion Unit User Interface