Chapter 5
| Port Connections
How to Connect to Twisted-Pair Copper Ports
– 41 –
Power-over-Ethernet The ECS2100 Series PoE switches support both IEEE 802.3af and IEEE 802.3at-2009
PoE standards. These switches are excellent choices for supplying power to
connected PoE devices such as web cameras, IP telephones, or access points.
Any PoE-compliant device attached to a port can directly draw power from the
switch over the Ethernet cable without requiring its own separate power source.
This capability gives network administrators centralized power control for devices
such as IP phones and wireless access points, which translates into greater network
availability.
For each attached PoE-compliant device, the switch automatically senses the load
and dynamically supplies the required power. The switch delivers power to a device
using the wire pairs in UTP or STP cable.
*The PoE power budget is the maximum amount of power that a switch can
provide to all attached devices. If the power budget is exceeded, the switch will not
enable the PoE power to any additional devices. The PoE power budget is not the
same as total power received by powered devices. For example, when the ECS2100-
28P provides 370 W, the total power received by devices may be only 350-365 W.
There are some transmit power losses in the connecting cabling, therefore different
powered devices will have a different power loss rate.
Connection Procedure Follow these steps to connect cables to 1000BASE-T RJ-45 twisted-pair copper
ports.
1. Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector.
Table 7: ECS2100 Series PoE Power Budget
ECS2100-10PE ECS2100-10P ECS2100-28P ECS2100-28PP ECS2100-
28PP with
one external
power supply
Total PoE
Power Budget
65 W 125 W 200 W 370 W*
740 W
*
* Testing Environment: 370 W (0-50° C), 740 W (0-45° C)
Ports supply up
to 15.4 W
simultaneously
4 8 12 24
Ports supply up
to 30 W
simultaneously
2461224
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