363-206-285 Detailed Level Procedure: DLP-514
Issue 2, February 2000 Page 16 of 18
DDM-2000 OC-3 MULTIPLEXER
Fiber Connection
10. At far end, connect the input optical fiber to the proper OLIU IN (receive)
connector.
11. Did FAULT LED go off on the far-end OLIU?
If NO, then continue with Step 12.
If YES, then proceed to Step 13.
12. Check optical fiber connections. Verify integrity of fiber connections by
ensuring correct output at one end is connected to correct input at the other
end. Replace OLIU with flashing LED. Continue with this procedure when
trouble is cleared.
13. At near end, connect the input optical fiber(s) to the corresponding OLIU IN
(receive) connector.
14. Did FAULT LED go off on the near-end OLIU?
If NO, then continue with Step 15.
If YES, then proceed to Step 16.
15. Check optical fiber connections at both ends of the fiber. Verify the integrity of
the fiber connections by ensuring OLIU output at one end is connected to the
correct OLIU input at the other end. Verify proper systems have been
connected by using the rtrv-map-neighbor: command (Figure 7 and 8).
Fiber Verification
16. Disconnect the fiber cable from the OUT connector on the OLIU at one end of
the span. At the other end, verify that the associated FAULT LED is flashing,
indicating a loss of signal. Reconnect the fiber and repeat the process for the
other direction of transmission.
17. Verify proper systems have been connected by using the
rtrv-map-network: and rtrv-map-neighbor: commands to retrieve a
map of the network (Figures 6, 7, and 8).
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