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HP ProCurve 2520 Planning And Implementation Manual: Hp Procurve 2520-poe Switches; Maximum Poe Power; Poe Power Requirements

Procurve power over ethernet (poe/poe+).
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Operating Rules
Provisioning Power for PoE

HP ProCurve 2520-PoE Switches

Maximum PoE Power

The Switch 2520-8-PoE and the Switch 2520G-8-PoE provision 8 ports with its
PoE power supply of 67 watts for PoE applications compatible with the IEEE
802.3af standard and some pre-standard PoE devices. The Switch 2520-24-PoE
and the Switch 2520G-24-PoE provision ports 1-24 with 195 watts of power for
PoE applications compatible with the IEEE 802.3af standard.
N o t e
There is no external power supply available for these switches.
Table 2-2.

PoE Power Requirements

It is important to understand the PoE power requirements of these switches
because if the PoE power is not planned and implemented correctly, end
devices connected to the PoE switch ports may not receive power if a switch
PoE power source failure occurs or if the switch is over provisioned.
Since there is no external power supply available for these switches it is very
important to understand that the 67 watts for the 8-port switches and the 195
watts for the 24-port switches are all there is for PoE power. Therefore, proper
provisioning is very important.
2-10
Maximum Power Allocations
PoE Devices
PoE for Switches
67 watts available to
2520-8-PoE
and
2520G-8-PoE
PoE for Switch
195 watts available to
2520-24-PoE
and
2520G-24-PoE
Internal Only
ports 1-8.
ports 1-24.

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