User Manual
ADCP-75-136 • Issue 1 • November 2002
Page 57
©
2002,
ADC
Telecommunications,
Inc.
T
X
R
X
DETAIL DRAWING
OF TYPE A AND TYPE B
MODULAR OPTICAL
TRANSCEIVERS
TX
RX
TYPE A
TRANSCEIVER
TYPE B
TRANSCEIVER
RELEASE
LEVER
RELEASE TAB
17280-A
Figure 33. DHU or DEU Optical Transceiver Installation
9.
Insert
the
optical
transceiver
into
the
socket
until
it
locks
into
place.
10.
Clean
the
optical
fiber
connectors
and
reconnect
to
the
optical
transceiver.
11.
Place
the
PORT
ON/OFF
switch
for
the
optical
transceiver
that
was
replaced
in
the
ON
position
(press
I).
Note:
If
the
DEU
was
turned
off
to
replace
the
HOST
PORT
optical
transceiver,
place
the
DEU
AC
power
On/Off
switch
in
the
ON
position
(press
I)
and
inform
the
NOC
or
alarm
monitoring
system
operator
that
the
alarm
has
been
cleared.
12.
Verify
that
the
DHU
or
DEU
optical
port
LED
indicators
shown
normal
optical
port
operation
(refer
to
Table
7
or
8).
6.7 DRU Modular Optical Transceiver Replacement Procedure
The
modular
optical
transceiver
should
be
replaced
when
testing
indicates
that
the
transceiver
has
failed.
Use
the
following
procedure
to
replace
an
optical
transceiver
in
a
DRU:
Danger:
This
equipment
uses
a
Class
1
Laser
according
to
FDA/CDRH
rules.
Laser
radiation
can
seriously
damage
the
retina
of
the
eye.
Do
not
look
into
the
ends
of
any
optical
fiber.
Do
not
look
directly
into
the
optical
transceiver
of
any
digital
unit
or
exposure
to
laser
radiation
may
result.
An
optical
power
meter
should
be
used
to
verify
active
fibers.
A
protective
cap
or
hood
MUST
be
immediately
placed
over
any
radiating
transceiver
or
optical
fiber
connector
to
avoid
the
potential
of
dangerous
amounts
of
radiation
exposure.
This
practice
also
prevents
dirt
particles
from
entering
the
transceiver
or
connector.
1.
Put
on
the
IR
filtering
safety
glasses.
2.
Slip
on
an
Electro-Static
Discharge
(ESD)
wrist
strap
and
connect
the
ground
wire
to
an
earth
ground
source.
Wear
the
ESD
wrist
strap
while
completing
the
optical
transceiver
replacement
procedure.
Warning:
Electronic
components
can
be
damaged
by
static
electrical
discharge.
To
prevent
ESD
damage,
always
wear
an
ESD
wrist
strap
when
handling
electronic
components.