Table 5: SRX220 Services Gateway PoE Specifications (continued)
ValuesPower Management Schemes
Ports 0/0 through 0/7 (interfaces ge-0/0/0
through ge-0/0/7).
Supported ports
120 W.Total PoE power-sourcing capacity
30 W.Per-port power limit
•
Static: Power allocated for each interface
can be configured.
•
Class: Power allocated for interfaces is
decided based on the class of powered
device connected.
Power management modes
PoE Classes and Power Ratings
A powered device is classified based on the maximum power that it draws across all
input voltages and operational modes. When the class-based power management mode
is configured on the services gateway, power is allocated by taking into account the
maximum power ratings defined for the different classes of devices.
Table 6 on page 6 lists the classes and their power ratings as specified by the IEEE
802.3af standard.
Table 6: PoE Classes and Power Ratings on the SRX220 Services Gateway
Maximum Power Level Output from the PoE PortClass
15.4 W0
4.0 W1
7.0 W2
15.4 W3
30.0 W4
Copyright © 2016, Juniper Networks, Inc.6
SRX220 Services Gateway Hardware Guide for H Model Numbers
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