Avaya C360 - Manual (Page 189)

Power Over Ethernet
Issue 1 July 2006 189
“Plug and Play" Operation
You can add and remove powered devices without manually reconfiguring the switch, since it
performs a periodic automatic load detection scan on non-powered ports.
● If a powered device that fits the above criteria is detected on a non-powered port, then
power is applied to the port.
● If a powered device is removed from a port, then power is denied to that port. The
disconnected port is then scanned as well.
Powering Devices
The C360 ports can receive Inline power from one of two sources: an internal -48VDC power
supply or an external DC power supply.
Each port can supply up to 15.4W by default to the powered device.
The internal power supply delivers a maximum of 305W for all the ports on the C363T-PWR and
520W on the C364T-PWR.
If a powered device tries to draw more than the maximum allowed for the connected port, power
is denied and you receive an "overcurrent" warning. Similarly, if the power drops below the
lower limit, for a port, power is denied to that port and an "undercurrent" warning is issued.
Priority
Since the internal power supply may not be capable of driving powered devices on all the ports
simultaneously, Avaya has implemented a priority mechanism.
This mechanism determines the order in which ports are powered after the switch is booted and
powered down if the power resources of the switch are exhausted.
There are three user-configurable priority levels:
● Low
● High
● Critical
The default value is "Low" for all ports.
Within these levels, priority is according to port number: the lower the port number, the higher
the priority.
Power will automatically be restored to PDs according to their priority when the power budget
increases. If the power budget is exceeded, power will not be provided to a new PD when you
attach it, even if you define its priority as "High" or "Critical."