Datasheet

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Power-over-Ethernet
(PoE IEEE 802.3af) Support
Two switch models in the SecureStack A2
product family provide a centralized IEEE
802.3af compliant power source for VoIP phones,
wireless access points (e.g., RoamAbout
AP4102), and remote security scanners and
cameras, eliminating the need for individual
power sources for these devices. Both switches
provide 48 volts of power over the normally
used pairs of each Category 5 Ethernet cable
with a total of 360 watts of power per switch.
The 24-port model can deliver Class 1 power
to all ports while the 48-port model can deliver
Class 2 support to all ports if they require
Power over Ethernet. Any individual port on
either switch can provide up to the maximum
15.4 watts specified in the IEEE standard. The
network manager has the ability to prioritize
which ports receive power if the power demand
exceeds the switch total of 360 watts. Special
power-shedding support is included in both
switches to enforce the network-manager-
specified priorities if the power demand
exceeds the maximum wattage. Additionally,
the SecureStack A2 PoE switches support a
device-detection feature that enables them to
work with powered as well as non-powered end
devices. This feature prevents any damage
from occurring when a port on either Matrix
PoE switch is connected to any compliant
RJ45 device that is already powered by its own
power source. This feature also allows any
mixture of Power-over-Ethernet devices and
standard Ethernet devices to be connected to a
single switch. These SecureStack A2 PoE
switches significantly simplify the installation
and capital costs of APs, VoIP phones and
security devices by allowing them to be
installed in out-of-the-way locations that are
without AC power thereby enabling maximum
coverage.
Outstanding Configuration Flexibility
With the SecureStack A2 switch family, mixing
and matching 10/100, 100Base-FX and
10/100 POE switches in a single stack is a
snap. A small stack can be started with dual
10/100 switches with redundant Gigabit
Ethernet uplinks to the core. If Power over
Ethernet is needed for remote access points or
a trial test of VoIP phones, a 10/100 PoE
switch can simply be added to the stack. If
there is a demand for fiber ports, 100Base-FX
switches can be added. As the stack grows, the
demands on the uplinks to the core will
increase. Distributed Link Aggregation can be
used to increase bandwidth from a single gigabit
up to four gigabit. All of these various types of
switches can be managed as a single entity
with a single IP address and all of the switches
in the stack run a common software image so
there are no incompatibility issues between
the switches. The simple flexibility of the
SecureStack A2 stacking makes it an elegant
solution.
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