Hardware Installation and Reference Guide
Appendix C: Lightning Protection
For the optical module with transmission distance exceeding 40 km and more, one on-line optical attenuator should
be added on the link to avoid the overload of the optical receiver when short single-mode optical fibers are used.
Optical modules generate laser. Do not stare at light source.
To keep optical modules clean, please use dust caps when the modules are not connected with fibers.
Table B-4 Specifications of SFP BIDI Optical Module Pairs
Rate/Distance
Module Pairs
1000M/500m
GE-SFP-SX-SM1310-BIDI
GE-SFP-SX-SM1550-BIDI
1000M/20km
GE-SFP-LX20-SM1310-BIDI
GE-SFP-LX20-SM1550-BIDI
100M/40km
GE-SFP-LH40-SM1310-BIDI
GE-SFP-LH40-SM1550-BIDI
The BIDI modules must be used in pairs (e.g., FE-SFP-LX20-SM1310-BIDI and FE-SFP-LX20-SM1550-BIDI).
