ADD-ON COMPUTER PERIPHERALS, INC. SFP-GD-BD43-AO AddOn MRV SFP-GD-BD43 Compatible SFP Transceiver - SFP (mini-GBIC) transceiver module (equivalent to: MRV SFP-GD-BD43) - GigE - 1000Base-BX - LC single-mode - up to 24.9 miles - 1490 (TX) / 1310 (RX) n