... ,000 or SFP, DC -48V)S3700-52P-PWR-EI Mainframe (48 Ethernet 10/100 ports, 4 Gig SFP, PoE+, Dual Slots ... MC ports, AC 110/220V)S3700-52P-SI-AC Mainframe (48 Ethernet 10/100 ports, 4 Gig SFP, AC 110/220V ... Gig SFP, AC 110/220V)S3700-52P-EI-AC Mainframe (48 Ethernet 10/100 ports, 4 Gig SFP, AC 110/220V ... )S3700-52P-PWR-SI Mainframe (48 Ethernet 10/100 ports, 4 Gig SFP, PoE+, Dual Slots ...