Alcatel-Lucent Data Multiplexer Explore 1665, Руководство по установке

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Additional optical tests (optional) Installation tests
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365-372-304R7.1
Issue 1, November 2007
4 - 5 7
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Additional optical tests (optional)
Low -speed optical testing
The following procedure is provided for installers wishing to further test the low-speed
optical packs using an optical test set. Perform the following steps for all 1665 DMX shelf
Function Unit or Growth slots. DCC will be disabled in order to prevent DCC alarms from
being generated due to the optical loopback.
To test this procedure an optical test set is required as well as a 1x2 optical splitter.
Important!
When reference is made to optical fiber loopback connections to IN and
OUT on the High-Speed OLIU, make the connections at the LGX equipment in order
to verify correct installation and labeling of the fibers.
The high-speed packs (OC-12, OC-48 or OC-192) should still be looped back on
themselves and the dcc disabled to prevent dcc alarms. The dcc can be verified with
the View -> DCC GUI command. If the high speed packs are no longer looped back,
do so at the LGX panel. The dcc should also be disabled at the function unit slot under
test since it will be connected to a test set and will register alarms. The dcc can be
provisioned with the Provision -> DCC Terminations GUI command. Change the dcc
on M2 and the FN slots by using the same command and double clicking on the m1
and selecting m2 or selecting the FN a-g slot.
The OC-48 Optical Packs including the High-Speed OLIUs should be attenuated with
15-dB LBOs. If using OC-192 in the high-speed slots, attenuate with 5 dB. LBOs are
installed on the OLIU faceplate IN port.
Procedure
Log in to the 1665 DMX shelf and verify that there are no existing alarms by viewing the
Alarm List.
CAUTION
Laser Safety
When connecting fiber loops between the IN and OUT ports on optical circuit
packs, always connect to the IN port first and then the OUT port. This will
prevent any optical radiation from being present at the fiber end.