Quad NIC option (2 additional, 4 total). Compatible with R2A IP servers. Not field upgradeable. Available at time of initial order only.5000-40151SKU: 5000-40151Technical Specifications Quad NIC option (2 additional, 4 total). Compatible with R2A IP servers. Not field upgradeable. Available at time of initial order only. Descarga de ManualManual en Español Descarga de Ficha TécnicaFicha Técnica en Español