System DescriptionH3C S3600 Series Ethernet Switches Chapter 2 Hardware Description2-322.6.5 Power SystemI. AC-input powerRated voltage: 100 to 240 VAC; 50 to 60 HzMax. tolerance: 90 to 264 VAC; 50 to 60 HzII. DC-input powerVoltage: -53 to -55 VDC.2.6.6 PoEThe S3600-28P-PWR-EI switch provides PoE (Power over Ethernet), that is, to supply-48V DC power to the remote powered device (PD), such as IP phone, WLAN wirelessaccess points (AP), Security, Bluetooth AP, through the twisted pair cable. As the power sourcing equipment (PSE), S3600-28P-PWR-EI supportsIEEE802.3af standard, and is also compatible with PDs that is not conformed tothis standard. The S3600-28P-PWR-EI provides power through 24 fixed Ethernet electrical ports,and thus is able to support up to 24 remote Ethernet switches with a maximumtransmission distance of 100 m (328 ft). The maximum power of each Ethernet port for the remote PD is 15.4 W. PoE input voltage ranges from -53 VDC to -55 VDC.2.6.7 Cooling SystemThe S3600-28P-PWR-EI is cooled by five fans.2.7 S3600-28P-PWR-SI Ethernet Switch2.7.1 AppearanceThe S3600-28P-PWR-SI has 24 x 10Base-T/100Base-TX Ethernet ports, four 1000Mbps SFP ports, and one Console port on its front panel, and on its rear panel both ACand DC power inputs.