363-206-285 Detailed Level Procedure: DLP-523
Issue 2, February 2000 Page 16 of 30
DDM-2000 OC-3 MULTIPLEXER
OLIU
19.
!
WARNING:
Unterminated optical connectors may emit invisible laser radiation. Do
not view beam with optical instruments. Avoid direct exposure to the
beam. Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
!
CAUTION:
Ensure that protection switching is available (protection line good and no
locks, inhibits, or forced switches in effect). When available, use a CIT
and the
switch-path:
command to do a protection switch. The line
protection switching request is unidirectional. It may be necessary to
perform a
switch-path:
command at the near end and far end to
switch both transmit and receive to the same line.
!
CAUTION:
When removing circuit packs, always remove the one without the lighted
ACTIVE
LED first. Remove optical fiber cables before removing circuit
pack and take care to avoid damage to fibers during removal or
installation of the circuit pack.
!
CAUTION:
Before installing
OLIU
s, ensure all optical fiber connectors and couplings
have been properly cleaned
[DLP-527]
. Signal performance may be
degraded if the connectors and couplings are not cleaned properly.
NOTE:
It is assumed that the loss of the optical facility is known from office
records or that a measurement has been made. Use
rtrv-state-eqpt: command to ensure service has been switched to
the other line then remove optical cables from OLIU to be replaced.
20. Is a 24G-U/24H-U or 29G-U/29H-U OLIU being replaced?
If YES, then proceed to Step 24.
If NO, then continue with Step 21.
21. Remove old OLIU and install same type replacement OLIU.
Response: FAULT LED on OLIU flashes.
DLP-527
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