Edge-Core ES3526VA-PoE, Руководство по установке, Страница: 45 / 74

4-1
Chapter 4: Making Network Connections
Connecting Network Devices
The PoE switch is designed to be connected to 10 or 100 Mbps network cards in PCs
and servers, as well as to other switches and hubs. It may also be connected to remote
devices using the optional 1000BASE-X, or 100BASE-FX SFP transceivers.
If 802.3af-compliant PoE devices are connected to the switch’s 10/100 Mbps ports, the
switch automatically supplies the required power.
Twisted-Pair Devices
Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors at
both ends. Use Category 5, 5e or 6 cable for 1000BASE-T connections, Category 5 or
better for 100BASE-TX connections, and Category 3 or better for 10BASE-T
connections.
Power-over-Ethernet Connections
The PoE switch automatically detects an 802.3af-compliant device by its authenticated
PoE signature and senses its required load before turning on DC power to the port.
This detection mechanism prevents damage to other network equipment that is not
802.3af complaint.
Note: Power-over-Ethernet connections work with all existing Category 3, 4, 5, 5e or 6
network cabling, including patch cables and patch-panels, outlets, and other
connecting hardware, without requiring modification.
The switch delivers power to a device using the two signal wire pairs in UTP or STP
cable (RJ-45 pins 1, 2, 3, and 6). The switch can provide up to 15.4 W of power
continuously on each 10/100 Mbps port. However, taking into account some power
loss over the cable run, the amount of power that can be delivered to a terminal device
is 12.95 W. If a device draws more than 15.4 W, from a port, an overload condition
occurs and the port turns off the power.
The switch controls the power and data on a port independently. Power can be
requested from a device that already has a data link to the switch. Also, the switch can
supply power to a device even if the port’s data connection has been disabled. The
power on a port is continuously monitored by the switch and it will be turned off as
soon as a device connection is removed.