RME AOX-MADI-EXT-SFP MADI Expansion Board For HDSPe AOX PCIe CardsThe RME AoX MADI Optical 128x128 MADI Expansion Board enables you to add 128 channels of MADI audio to your HDSPe AoX M or HDSPe AoX D network audio interface PCIe card. The board features two optical SFP I O connectors and a BNC Word Clock I O connector. The board comes with SFP Multimode MADI modules. An SFP single mode MADI module is available separately. Each HDSPe AoX PCIe card can integrate up to two, optional AoX MADI Optical or AoX MADI Coax