Nortel Networks 1000BASE-LX User Manual

Appendix B Installing a Gigabit Interface Converter (GBIC)

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Before installing your GBIC, read the following handling, safety, and 
environmental guidelines:

•

GBICs are static sensitive. To prevent damage from electrostatic discharge 
(ESD), follow your normal board and component handling procedures.

•

GBICs are dust sensitive. When storing a GBIC, or when a GBIC is 
disconnected from a fiber optic cable, always keep the dust cover over a 
GBIC’s optical bores.

•

To clean contaminants from the optical bores of a GBIC, use an alcohol swab 
or equivalent to clean the ferrules of the optical connector.

•

Dispose of this product according to all national laws and regulations.

Note: When shorter lengths of single-mode fiber cable are used, there is 
a risk of overloading the receiver. It may be necessary to insert an in-line 
optical attenuator in the link to prevent overloading, as follows:

•

Insert a 10dB in-line optical attenuator between the fiber optic cable 
plant and the receiving port on the 1000BASE-ZX GBIC, at each end 
of the link, if the fiber optic cable span is less than 25 km.

•

Insert a 5dB in line optical attenuator between the fiber optic cable 
plant and the receiving port on the 1000BASE-ZX GBIC, at each end 
of the link, if the fiber optic cable span is less than 50 km.

Note: The 1000BASE-ZX GBIC is based on proprietary signaling. 
Nortel Networks recommends that this product be used only with other 
Nortel Networks 1000BASE-ZX GBICs.