Transition Networks - SFP (mini-GBIC) transceiver module - GigE - 1000Base-LX - LC single-mode - up to 6.2 miles - 1310 nm - for P/N: 4GE-SFP-LC, 4GE-SFP-LC=, 4GE-SFP-LC-5PACK=, 4GE-SFP-LC-RF, 4GE-SFP-LC-RF=