C
HAPTER
1
| Introduction
Power-over-Ethernet
– 18 –
ES-2010G / ES-2010GP
P
OWER
-
OVER
-E
THERNET
All eight ports (1~8) of the ES-2010GP switch support the IEEE 802.3at
standard that enables DC power to be supplied to attached devices using
wires in the connecting Ethernet cable. The total PoE power delivered by all
ports cannot exceed the 75 W power budget.
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. Any RJ-45 port
on the switch can provide up to 34.2 W of power, but only two ports can
deliver 34.2 W simultaneously to attached devices without exceeding the
switch power budget.
D
ESCRIPTION
OF
H
ARDWARE
10/100/1000BASE-T
P
ORTS
The switches contain 8 RJ-45 ports that operate at 10 Mbps or 100 Mbps,
half or full duplex, and 1000 Mbps full duplex. Because all ports on these
switches support automatic MDI/MDI-X operation, you can use straight-
through cables for all network connections to PCs or servers, or to other
switches or hubs. (See
“1000BASE-T Pin Assignments” on page 47
.)
Each of these ports supports auto-negotiation, so the optimum
transmission mode (half or full duplex), and data rate (10, 100, or 1000
Mbps) can be selected automatically. If a device connected to one of these
ports does not support auto-negotiation, the communication mode of that
port can be configured manually.
Each port also supports IEEE 802.3x auto-negotiation of flow control, so
the switch can automatically prevent port buffers from becoming
saturated.
SFP T
RANSCEIVER
S
LOTS
The Small Form Factor Pluggable (SFP) transceiver slots are independent
ports.
The following table shows a list of transceiver types which have been
tested with the switch. For an updated list of vendors supplying these
transceivers, contact your local dealer. For information on the
recommended standards for fiber optic cabling, see
