Switch HP 1820-48G:  HP 1820-48G Switch provides a flexible extension of Ethernet networks in smaller enterprises that require ease of use and low cost. This model brings the ease of administration via a web interface even without extensive technical knowledge. Fanless design is characterized by low noise, it can be placed almost anywhere (wall, on a table, under the table). Allows installation into standardized boxes Rack (19 ), all for the installation is supplied with the device.Switch provides 48 copper RJ-45 ports support 100/1000 Mbit/s data transmission in local area network and 4 SFP ports. The distribution priority data streams ensures Quality of Service (QoS). Low energy consumption is ensure through an improved solution of Energy Efficient Ethernet (IEEE) and system PoE (Power over Ethernet).  Specifications:Supported network standards:IEEE 802.3 10 Base-TIEEE 802.3u 100 Base-TXIEEE 802.3ab 1000 BASE-TDuplex: 10 BASET / 100 BASE-TX half / full 1000 BASE-T fullInterface:48 RJ-45 10/100/1000 ports (autosense)4 SFP ports 100/1000Memory and processor:16 megabytes flashPacket Buffer 1.5 megabytes128 MB SDRAMWaiting time:At 100 Mbit / s: <7 microsecond (64-byte packets regime LIFO)At 1000 Mbit / s <2 microsecond (64-byte packets regime LIFO)Capacity Routing / Switching:104 Gbit/sData rate:Up to 77.3 million packets/sPower Requirements100-127/200-240 VAC; 50/60 HzConsumption:39 WSafety standards:UL 60950-1CAN/CSA 22.2 No. 60950-1EN 60825IEC 60950-1EN 60950-1Electromagnetic standards:FCC Class AEN 55022/CISPR-22 Class AVCCI Class A