Series AFS8202M
Alba Fiber Systems Inc. Specifications are subject to change without notice.
Page 27 6/20/14
www.albafiber.net
Industrial Redundant Managed Ethernet Media Converter with 2 Ports
1 x 10/100/1000BaseT(X) Port, 1 x 1000M SFP Port
6.2.1 Command Usage of PoE
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The switch can provide DC power to a wide range of connected devices, eliminating the need
for an additional power source and cutting down on the amount of cables attached to each
device. Once configured to supply power, an automatic detection process is initialized by the
switch that is authenticated by a PoE signature from the connected device. Detection and
authentication prevent damage to non-compliant devices (IEEE 802.3af or 802.3at).
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This switch supports both the IEEE 802.3af PoE and IEEE 802.3at-2009 PoE Plus standards. To
ensure that the correct power is supplied to powered devices (PD) compliant with these
standards, the first detection pulse from the switch is based on 802.3af to which the 802.3af PDs
will respond normally. It then sends a second PoE Plus pulse that causes an 802.3at PD to
respond as a Class 4 device and with the PD such as duty-cycle, peak and average power needs.
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All the RJ-45 ports support both the IEEE 802.3af and IEEE 802.3at standards. The total PoE
power delivered by all ports cannot exceed the maximum power budget of 80W.
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The switch’s power management enables individual port power to be controlled within the
switch’s power budget. Port power can be automatically turned on and off for connected devices,
and a per-port power priority can be set so that the switch never exceeds its power budget.
When a device is connected to a switch port, its power requirements are detected by the switch
before power is supplied. If the power required by a device exceeds the power budget of the
port or the whole switch, power is not supplied.
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Ports can be set to one of four power priority levels, critical, high, medium, or low. To control
the power supply within the switch’s budget, ports set at critical to medium priority have power
enabled in preference to those ports set at low priority. For example, when a device connected to
a port is set to critical priority, the switch supplies the required power, if necessary by denying
power to ports set for a lower priority during boot up.
NOTE: For more information on using the PoE provided by this switch refer to the Installation
Guide.
PATH
Configuration, PoE
PARAMETERS
These parameters are displayed:
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Reserved Power determined by - There are three modes for configuring how the ports or
attached Powered Devices (PD) may reserve power:
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Class
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Each port automatically determines how much power to reserve according to the
class to which the connected PD belongs, and reserves power accordingly. Four different port
classes exist, including 4, 7, 15.4 or 34.2 Watts. In this mode, the Maximum Power fields have
no effect.
