Power Over Ethernet - Hirschmann MACH 4000 Reference Manual

Basic Settings

1.5 Power over ETHERNET

If the device is equipped with PoE media modules, it will then allow you to
supply current to devices such as IP phones via the twisted-pair cable. PoE
media modules support Power over ETHERNET according to IEEE 802.3af.
On delivery, the Power over ETHERNET function is activated globally and on
all ports.
Nominal power for MS20/30, MACH 1000 and PowerMICE:
The device provides the nominal power for the sum of all PoE ports plus a
surplus. Because the PoE media module gets its PoE voltage externally, the
device does not know the possible nominal power.
The device therefore assumes a "nominal power" of 60 Watt per PoE media
module for now.
Nominal power for MACH 4000:
The device provides the nominal power for the sum of all PoE ports plus a
surplus. Should the connected devices require more PoE power than is
provided, the device then switches PoE off at the ports. Initially, the device
switches PoE off at the ports with the lowest PoE priority. If multiple ports
have the same priority, the device first switches PoE off at the ports with the
higher port number.
With "Function on/off" you turn the PoE on or off.
With "Send Trap" you can get the device to send a trap in the following
cases:
– If a value exceeds/falls below the performance threshold.
– If the PoE supply voltage is switched on/off at at least one port.
Enter the power threshold in "Threshold". When this value is exceeded/
not achieved, the device will send a trap, provided that "Send trap" is
enabled. For the power threshold you enter the power yielded as a
percentage of the nominal power.
"Nominal Power" displays the power that the device nominally provides
for all PoE ports together.
"Reserved Power" displays the maximum power that the device provides
to all the connected PoE devices together on the basis of their
classification.
"Delivered Power" shows how large the current power requirement is at
all PoE ports.
RM Web L3E
Release 6.0 07/2010
1.5 Power over ETHERNET
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