Lucent Technologies WaveStar OLS 40G, Installation Manual

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10-4
Issue 1.0 March 2001
365-575-389
Installation Manual
Fiber Connections
Overview (Continued)
Optical Line
Buildouts (LBOs)
Faceplate LBOs must be chosen during installation for some OA inputs and
outputs. All other inputs and outputs should always be equipped with a 0 dB LBO.
A wide variety of LBOs are available for Release 2.1 and subsequent releases. A
new family of Green colored single-mode to single-mode LBOs designed for 1550
nm with higher power capability is available. To handle the transition from single-
mode to multi-mode another family of LBOs was developed and is Gray colored.
All inputs to OTPMs must use this Gray LBO.
Refer to Appendix I, Line Buildout (LBO) to obtain tolerances, power ratings, and
further data on LBOs.
!
WARNING:
The 15 dB and higher Yellow colored LBOs are made using a carbon-
loaded plastic element instead of the clear plastic element used in LBOs of
lower attenuation. The carbon-loaded plastic element experiences localized
heating that tends to increase their attenuation at input powers above 0
dBm. To minimize the long-term reliability risk and provide predictable
attenuation, the 15 dB and up LBOs should not be used to attenuate signals
of greater than +3 dBm.