3COM 3CR17251-91-US 48 port Switch Networking

3COM - 5500G-EI ETHERNET 10/100/1000 48-PORTS MANAGED NETWORKING SWITCH (3CR17251-91-US). KEY FEATURES : DEVICE TYPE : SWITCH - STACKABLE ENCLOSURE TYPE : EXTERNAL - 1U NETWORKING : PORTS QTY : 48 X ETHERNET 10BASE-T, ETHERNET 100BASE-TX, ETHERNET 1000BASE-T DATA TRANSFER RATE : 1 GBPS DATA LINK PROTOCOL : ETHERNET, FAST ETHERNET, GIGABIT ETHERNET ROUTING PROTOCOL : OSPF, RIP-1, RIP-2, IGMPV2, IGMP, PIM-SM, STATIC IP ROUTING, PIM-DM REMOTE MANAGEMENT PROTOCOL : RMON 1, SNMP, TELNET, SNMP 3, HTTP CONNECTIVITY TECHNOLOGY : WIRED SWITCHING PROTOCOL : ETHERNET MAC ADDRESS TABLE SIZE : 16K ENTRIES FEATURES : FLOW CONTROL, LAYER 3 SWITCHING, DHCP SUPPORT, AUTO-NEGOTIATION, BOOTP SUPPORT, ARP SUPPORT, VLAN SUPPORT, AUTO-UPLINK (AUTO MDI/MDI-X), IGMP SNOOPING, STACKABLE, 3COM XRN TECHNOLOGY COMPLIANT STANDARDS : IEEE 802.3, IEEE 802.3U, IEEE 802.3I, IEEE 802.3Z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3AB, IEEE 802.1P, IEEE 802.3AF, IEEE 802.3X, IEEE 802.3AD (LACP), IEEE 802.1W, IEEE 802.1X, IEEE 802.3AE, IEEE 802.1S EXPANSION / CONNECTIVITY : EXPANSION SLOTS TOTAL (FREE) : 4 ( 4 ) X SFP (MINI-GBIC) 1 ( 1 ) X EXPANSION SLOT INTERFACES : 48 X NETWORK / POWER - ETHERNET 10BASE-T/100BASE-TX/1000BASE-T - RJ-45 1 X MANAGEMENT - CONSOLE - RJ-45 2 X NETWORK STACK DEVICE POWER : POWER DEVICE : POWER SUPPLY - INTERNAL VOLTAGE REQUIRED : AC 120/230 V ( 50/60 HZ )