ADCP-75-110
•
Issue 2B
•
July 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 small form factor LC type
optical
transceiver, 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. The DEU also provides one optical port
designated
the host port for the optical interface with the DHU or a supporting DEU.
1.4.5 Powering
The
DEU is powered by 120–240 Vac (50–60 Hz) power which is supplied though a standard
three-conductor
AC power cord. The power cord is provided with the DEU and is 98 inches
(2.5
meters) long. A reset able 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 fans mounted on the right side of the sheet
metal
housing. A minimum of 3 inches (76 mm) 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 (>50º C/122º F) occurs. The 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.
16423-A
(2) AC POWER
ON/OFF SWITCH
(3) OPTICAL PORT
LED INDICATOR
(6 PLACES)
(4) OPT/ELEC PORT
ENABLE/DISABLE
SWITCH (6 PLACES)
(8) 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)
(9) 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
Summary of Contents for Digivance
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