Ethernet Routing Gigabit Switch

We are offering nortel 5520-48t-pwr ethernet routing gigabit switch 48 ports.
description:
the nortel ethernet routing switch 5520 models are 1 rack unit high stackable 10/100/1000 mbps ethernet layer 3 routing switches designed to provide high-density gigabit desktop connectivity & power over ethernet (poe) capability to mid-size and large enterprise customers' wiring closets. The nortel ethernet routing switch 5520 models feature four built-in sfp gbic ports for uplink, and may be stacked with each other or themselves, in stacks of 8 units, to achieve a maximum of 384 10/100/1000 ports for high-density desktop switching & poe capability.
• manufactured by: nortel
• model/part : 5520-48t-pwr
• device type: switch - stackable
• enclosure type: external - 1u
• networking ports qty: 48 x ethernet 10base-t, ethernet 100base-tx, ethernet 1000base-t
• max units in a stack: 8
• data transfer rate: 1 gbps
• data link protocol: ethernet, fast ethernet, gigabit ethernet
• routing protocol: rip-1, rip-2, static ip routing
• remote management protocol: rmon 2, snmp, rmon, telnet, snmp 3, http
• connectivity technology: wired
• communication mode: half-duplex, full-duplex
• switching protocol: ethernet
• mac address table size: 16k entries
• status indicators: link activity, port transmission speed, port duplex mode, power, status
• features: flow control, full duplex capability, layer 3 switching, ip-routing, power over ethernet (poe), auto-correction of twisted-pair polarity reverse, auto-negotiation, bootp support, arp support, trunking, vlan support, auto-uplink (auto mdi/mdi-x), igmp snooping, traffic shaping, port mirroring, diffserv support, manageable, stackable, mac address filtering
• compliant standards: ieee 802.3, ieee 802.3u, ieee 802.1d, ieee 802.1q, ieee 802.1p, ieee 802.3af, ieee 802.3x, ieee 802.3ad (lacp), ieee 802.1w, ieee 802.1x, ieee 802.1s
• expansion slots total (free): 4 ( 4 ) x sfp (mini-gbic)
• interfaces: 48 x network / power - ethernet 10base-t/100base-tx/1000base-t
• encryption algorithm: ssl
• authentication method: secure shell (ssh), radius, secure shell v.2 (ssh2)
• compliant standards: ul, bsmi cns 13438 class a, cul, en 60950, en 61000-3-2, en55022, nom, vcci class a ite, iec 60950, en 61000-3-3, en55024, csa 22.2 no. 60950, cb, as/nz 3548 class a, ices-003 class a, rohs
• power over ethernet (poe): yes
• power device: power supply - internal
• voltage required: ac 120/230 v ( 50/60 hz )
• features: redundant power system (rps) connector
• width: 17.2 in
• depth: 15.2 in
• height: 1.8 in
• weight: 19.4 lbs