The D-Link DGS-2000-28 is a fully managed 28-port Gigabit Managed switch for offices and corporate networks. The switch is equipped with 24 10/100/1000M RJ-45 ports and four combined Gigabit Combo RJ-45/SFP ports, with support for 100M and 1000M SFP (Mini-GBIC) transceivers for optical uplink. The fanless design ensures quiet operation and allows deployment directly in the office, the delivery also includes brackets for mounting in a 19 "cabinet. The D-Link DGS-2000 series switches offer a comprehensive set of L2 functions, security functions, quality of service (QoS) functions and basic L3 functions (max. 4 IP Interfaces, static routing with max. 128 IPv4/IPv6 records, default route, IPv6 Neighbor Discovery). 802.3ah OAM, cable diagnostics, and D-Link Unidirectional Link Detection (DULD) make troubleshooting network problems easier. ISPs will appreciate the Q-in-Q (Port Based), Multicast VLAN (ISM VLAN) or IGMP Authentication/Filtering features for efficient operation of IPTV services. Switch management is via web interface, CLI serial console, Telnet, SLL, SSH or via SNMP commands. A free SW tool and D-Link Network Assistant (DNA) mobile application are available for initial configuration and basic management, and the advanced D-View 7 platform is intended for central management of larger networks. TECHNICAL PROPERTIESSize: 19 inch width for rack mounting; 1U height Interface: 24 x 10/100/1000BASE-T ports; 4 x 100/1000 Mbps GbE/SFP combo ports Console Port: RJ-45 connector Network cable: UTP Cat. 5, Cat. 5E (100m max) Full/Half-Duplex: Full/half-duplex for 10/100 Mbps speeds; Full-duplex for 1000 Mbps speed Interface Media: Automatic MDI/MDIX setup for all twisted-pair ports Switching capacity: 56 Gbps MAC address table size: 8K CPU memory: 256 MB DDR3 Packet Buffer: 4.1 MBits Flash memory: 32 MB Power consumption: 100 to 240 V AC internal power supply MTBF: 992,594 hours Maximum power consumption: 17.32 W Dimensions (W x D x H): 440 x 140 x 44 mm Weight: 2.15 kg Fans: None Operating temperature: -5 to 50 C Safety certificates: cUL, UL, CB, BSMI