363-206-285 Detailed Level Procedure: DLP-514
Issue 2, February 2000 Page 4 of 18
DDM-2000 OC-3 MULTIPLEXER
NOTE:
Optical fibers connecting this shelf with a far end shelf should not be
connected to the OLIU until at least 45 seconds after an optical loopback
is removed.
NOTE:
It may take from 15 seconds to 3 minutes and 25 seconds for the FAULT
LEDs to stop flashing after the cables are connected, depending on the
setting of the OC-12, OC-3, or OC-1 signal degrade threshold (–5 to –9).
Remove protective covers from transmit optical jumper cables and lightguide
buildout(s) [LBO(s)] and clean
ST
, FCPC, or SC connectors and LBO(s).
Reference: DLP-527
5. Have you determined the value of the lightguide buildouts (LBOs) for this
span?
If YES, then proceed to Step 9.
If NO, then continue with Step 6.
Optical Power Measurement
Steps 6 through 9 are used to measure optical power. Replace LBOs with 0 dB
LBOs per Figures 1, 2, 3, 4, and/or 5. Connect the optical fiber transmit cable
to the OLIU OUT connection. Measure the optical power of the optical fiber
receive cables at the other ends using an optical power meter.
6. At both ends of the optical span, replace the
ST
, FCPC, or SC LBOs with 0 dB
LBOs per Figures 1, 2, 3, 4, and/or 5 [DLP-552].
7.
NOTE:
For DDM-2000 OC-3 ring configurations, optical fibers extend in two
different directions to make up the ring. At each shelf (node) in the ring,
the MAIN 1 OLIU will connect to the MAIN 2(P) OLIU in one adjacent
node, and the MAIN 2(P) OLIU will connect to the MAIN 1 OLIU in the
other adjacent node. In Dual 0x1 configurations, the MAIN 1 OLIU will
connect to the OC-12 FN( ) 1 OLIU and the MAIN 2(P) OLIU will connect
to the OC-12 FN( ) 2(P) OLIU.
DLP-527
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