363-206-204
Release 8 Installation Tests
Issue 9 October 1998
7-13
shelf to verify that Network Side (ns) and User Side (us) parameters are set
to opposite values at the OLIU slot addresses of each optical span. Refer
to the "OSI User Side/Network Side Settings" Table at the bottom of Figure
7-4 to see how these parameters should be set for the network shown.
If User Side/Network Side parameters are not opposite at the ends of an
optical span, change the setting at one end using the set-fecom; com-
mand.
Fiber Verification Procedure and Optical Test
The following procedure verifies that the optical fiber cables are properly
connected.
!
WARNING:
Unterminated optical connectors may emit laser radiation. Do not view
beam with optical instruments. Avoid direct exposure to beam.
NOTE
:
The procedure requires personnel at both ends of the DDM-2000 OC-3
point-to-point system or hubbing application.
1. Determine the fiber interconnections for a multispan system configuration.
Refer to Figure 7-3 and Figure 7-4.
2. Disconnect the optical loopback fibers from the OLIUs and connect the
transmission fibers to their predetermined OLIU connectors.
NOTE
:
For OLIUs with LBOs on the connectors for loopback purposes, determine
whether the LBO should be changed per the span length and change if
necessary before connecting transmission fibers.
3. After a few moments, verify that no alarms are present. If alarms are
present, press the UPD/INIT pushbutton on the SYSCTL. If alarms do not
clear, refer to the "Troubleshooting" section of this manual.
4. Disconnect the fiber cable from the OUT jack on the Main-1 OLIU or Fn-1
OLIU (when provided) at one end of the span. At the other end, verify that
the appropriate OLIU FAULT LED is flashing, indicating loss of signal.
NOTE
:
Figures 7-3 and 7-4 show examples of multispan system configurations.
5. Reconnect the fiber and repeat this procedure for the opposite direction of
transmission.
6. To obtain a map of the SONET network to verify fiber connections, issue
the command rtrv-map-net;. Verify that all shelves interconnected via
optical fiber are reported in the Network Map.
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