JUNIPER NETWORKS - QFX SERIES QFX3500 SWITCH - L3 - MANAGED (QFX3500-48S4Q). KEY FEATURES : PRODUCT NAME : QFX 3500 MODULAR SWITCH PRODUCT TYPE : ETHERNET SWITCH INTERFACES/PORTS : 2 X MANAGEMENT, 1 X USB NUMBER OF EXPANSION SLOTS : 52 EXPANSION SLOTS : (48 TOTAL) SFP+, (4 TOTAL) EXPANSION SLOT . . .