363-206-285 Circuit Order: NTP-023
Issue 2, February 2000 Page 4 of 8
DDM-2000 OC-3 MULTIPLEXER
DO ITEMS BELOW IN ORDER LISTED . . . . .FOR DETAILS, GO TO
11.
NOTE:
A CP removed alarm will occur when the OLIU is removed.
An inc. OC-3 LOS (blinking FAULT LED on OLIU)alarm
will occur at the other node connected to the removed fibers.
Other nodes will receive inc. VT and STS AIS alarms.
AtthestartingNode(Node1inthisexample),liftthefaceplate
latch and remove optical fibers from MAIN 2(P) OLIU,then
remove MAIN 2(P) OLIU.
12.
NOTE:
When the 24/29-Type OLIU is installed in this step, an
unexpected CP type status and inc. OC-12 LOS
alarm will occur. At the connecting node, an
inc. OC-3 LOS alarm will occur. When fibers are
reconnected, the unexpected CP type status is still
present at this Node and an inc. OC-12 LOF alarm will
occur. An inc. OC-3 LOF alarm will occur at the
connecting Node.
At the starting Node, install a 24/29-Type OLIU into MAIN 2(P)
OLIU slot and reconnect optical fibers.
13.
NOTE:
A CP removed alarm will occur in this step when the MAIN
1OLIUis removed. A inc. OC-12 LOS alarm will occur at
the connecting Node with the 24/29-Type OLIU installed.
At the other end of the OC-12 optical span being established, lift
the faceplate latch and remove optical fibers from MAIN 1 OLIU,
then remove MAIN 1 OLIU.
14.
NOTE:
When the 24/29-Type OLIU is installed, an
unexpected CP type status alarm will occur. The
inc. OC-12 LOS alarm clears at both ends of the span.
The inc. VT and STS AIS alarms clear downstream.
Install a 24/29-Type OLIU into MAIN 1 OLIU slot and reconnect
optical fibers. Wait until the blinking FAULT LED goes off
before continuing.
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