Lucent Technologies DDM-2000 OC-3, Руководство по установке

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363-206-204
Release 8 Installation Tests
Issue 9 October 1998 7-9
NOTE
:
After completing the shelf test, isolate and replace any failed units. If any
units are replaced, repeat the LED test and local equipment test until both
tests pass without failures.
NOTE
:
If the shelf is not fully equipped, move circuit packs around and repeat the
test. Test all circuit pack positions.
Preparation Procedure
1. If the DDM-2000 OC-3 is in an RT, change the timing mode on the BBF2/
BBF2B (TGS) circuit packs from loop timed to free running. If the timing
mode is changed, press the UPD/INIT pushbutton on the SYSCTL after the
change is completed.
2. Fully insert the OLIUs into the shelf.
3. Connect the OLIU OUT to the OLIU IN of each OLIU (loopback), using opti-
cal fiber cables. Refer to Figure 7-1.
NOTE
:
The optical fiber cables required are listed under "Tools, Test Sets, and
Accessories".
NOTE
:
When looping a 22G-U OLIU back on itself a 10 dB LBO is required.
4. During the loopback test the far-end communications must be disabled.
Issue the command
set-fecom
:
dcc-all
:
com=disabled;.
5. After a few moments, check that no alarms are present (that is, no FAULT
LED lighted on any circuit packs). If alarms are present, press the UPD/
INIT pushbutton on the SYSCTL. If alarms do not clear, refer to the "Trou-
bleshooting" section of this manual.
Procedure
Issue the command
test-auto:md=local
(TEST-AUTO TURNUP).
The CR and MJ LEDs on the user panel will light. This indicates the start of the
shelf test. Any circuit pack failing this test will light its FAULT LED during the test.
When the test has successfully completed, all LEDs will go out.
The results will be displayed on the CIT, with a
g
indicating good, an F indicating
failure, and a - indicating unequipped under each pack designation.
Leave the optical fiber loopbacks in place.