O
VERVIEW
1-3
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 802.3af-compliant device, the switch automatically
senses the load and dynamically supplies the required power. The switch
delivers power to a device using the two data wire pairs in UTP or STP.
Each port can provide up to 15.4 W of power at the standard -48 VDC
voltage. Independent overload and short-circuit protection for each port
allows the switch to automatically shut down a port’s power when limits
are exceeded.
Network devices such as IP phones, wireless access points, and network
cameras, typically consume less than 10 W of power, so they are ideal for
Power-over-Ethernet applications.
Network Management Options
With a comprehensive arrange of LED indicators, this switch provides “at
a glance” monitoring of network and port status. The switch can be
managed over the network with a web browser or Telnet application, or via
a direct connection to the console por t. The switch includes a built-in
network management agent that allows it to be managed in-band using
SNMP or RMON (Groups 1, 2, 3, 9) protocols. It also has an RS-232 serial
port (DB-9 connector) on the front panel for out-of-band mana gement. A
PC may be connected to this port
for configuration and monitoring
out-of-band via a
null-modem serial cable. (See Appendix B for wiring
options.)
For a detailed description of the advanced features, refer to the
Management Guide.