LevelOne POH-0850TX Benutzerhandbuch

 

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Power-over-Ethernet (PoE) eliminates the need to run 110/220 VAC power to other 

devices on a wired LAN. Using Power-over-Ethernet system installers need to run only 

a single CAT5 Ethernet cable that carries both power and data to each device. This 

allows greater flexibility in the locating of network devices and significantly decreasing 

installation costs in many cases. 

 

There are two system components in PoE -- the Power Sourcing Equipment (PSE) 

initiates the connection to the second component, the Powered Device (PD). The 

current is transmitted over two of the four twisted pairs of wires in a Category-5 cable. 

 

Power over Ethernet follows the IEEE 802.3af and is completely compatible with 

existing Ethernet switches and networked devices. Because the Power Sourcing 

Equipment (PSE) tests whether a networked device is PoE-capable, power is never 

transmitted unless a Powered Device is at other end of the cable. It also continues to 

monitor the channel. If the Powered Device does not draw a minimum current, 

because it has been unplugged or physically turned off, the PSE shuts down the power 

to that port. Optionally, the standard permits Powered Devices to signal to the PSEs 

exactly how much power they need. 

 

 

 

 

POH-0850TX, 8-port power over Ethernet Hub 

 

IEEE802.3af compliance, Power over Ethernet Mid-Spain mode 

 

Remote power feeding up to 100 meters and for IEEE802.3 10Base-T, IEEE 

802.3u 100Base-TX standard 

 

Auto detect PD and classification power consumption level 

 

Support manual control port detect and classification 

 

Support system calibrate 

 

Support Auto MDI/MDI-X depends on the uplink switch port.