GBIC-MMF and GBIC-SMF - Overview
GBIC-MMF - 1000Base-SX GBIC Module (MMF), 550m (1804 feet) - designed to work with multimode fiber (orange).
GBIC-SMF - 1000Base-LX GBIC Module (SMF), 20km (12.5 miles) - designed to work with single mode fiber (yellow).
Pakedge GBIC-MMF and GBIC-SMF are used to convert copper to Fiber connections on Pakedge switches that contain SFP ports. Use GBIC-MMF for multi-mode fiber connections and GBIC-SMF for single-mode fiber connections