Optional at initial order or as field upgrade. Order up to four (or up to two for multi-protocol systems) full height adapters (mix with 10GbE Optical, 10GbE Twinax, 10GBASE-T, 25GbE, 100GbE or FC) per system. Provides four 10/25GbE SR, 85c, MMF Duplex SFP28 transceivers. Includes Four 16ft (4.9m) 10/25GbE optical cables. Requires DXi software version 4.7 or later. Customer installable. Will be installed at no additional charge during system or physical capacity installation. Optional onsite (SDY48-NSYS-000x) or phone-based (SDY48-NSYS-PB00) installation available when only an adapter is being installed.