24 ports of PoE with 180W of power available Mix and match stacking via the built-in gigabit ports - manageable by a single GUI Physical Specifications * Dimensions (H x W x D): 1.70 x 17.32 x 10.12 in. (43.2 x 440 x 257 mm) * Weight: 8.91 / 4.05 (lbs/kg) Network Protocol and Standards Compatibility * IEEE 802.3 10BASE-T * IEEE 802.3u 100BASE-TX * IEEE 802.3ab 1000BASE-T * IEEE 802.3z 1000BASE-X * IEEE 802.3x full-duplex flow control * IEEE 802.3af power over Ethernet Interfaces * 48 10/100 Mbps auto sensing switching ports * 24 10/100 Mbps ports with PoE * 4 built-in RJ-45 Gigabit Ethernet ports for 10/100/1000 Mbps connectivity * 2 SFP slots for fiber Gigabit Ethernet modules * Auto-sensing and auto-negotiating capabilities for all ports * Auto Uplink™ on all ports to make the right connection Administrative Switch Management * IEEE 802.1Q VLAN (128 groups, Static or Dynamic) * IEEE 802.1p Class of Service (CoS) * Port-based QoS * IEEE 802.3ad Link Aggregation (LACP) * IEEE 802.1D Spanning Tree Protocol * SNMP v1, v2c, v3 * RFC 1213 MIB II * RFC 1643 Ethernet Interface MIB * RFC 1493 Bridge MIB * RFC 2131 DHCP client * IEEE 802.1x * Port-based security by locked MAC addresses * Storm control for broadcast, multicast and unknown unicast packets * Port-based ingress/egress rate limiting * SNTP * RMON group 1, 2, 3, 9 * Private Enterprise MIB * Port Mirroring Support * Web-based configuration * Configuration Backup/Restore * Password Access Control * Firmware upgradeable Performance Specifications * Forwarding modes: Store-and-forward * Bandwidth: 17.6 Gbps * Network latency: Less than 20 microseconds for 64-byte frames in store-and-forward mode for 100 Mbps to 100 Mbps transmission * Buffer memory: 128 KB * Address database size: 8,000 media access control (MAC) addresses per system * Addressing: 48-bit MAC address * Mean Time Between Failure (MTBF): 80,000 (~9 years) LEDs * Unit: Power, Master, Stack ID * Per Port: Link, Speed, Activity * Per Gigabit Port: Link, Speed, Activity, Stack * PoE Max, PoE active, PoE fault Power Supply * Power Consumption: 15 W maximum * 100-240VAC/50-60 Hz universal input * 180 W PoE power budget Environmental Specifications * Operating temperature: 32 to 104° F (0 to 40° C) * Storage temperature: -4 to 158° F (-20 to 70° C) * Operating humidity: 90% maximum relative humidity, non-condensing * Storage humidity: 95% maximum relative humidity, non-condensing * Operating altitude: 10,000 ft (3,000 m) maximum * Storage altitude: 10,000 ft (3,000 m) maximum Electromagnetic Compliance * CE mark, commercial * FCC Part 15 Class A * VCCI Class A * EN 55022 (CISPR 22) * EN 55024 (CISPR 24) * C-Tick Safety * CE mark, commercial * CUL 60950 (Listed)/ EN60950 (Low Voltage Directive)