Installation guide

Chapter 1: Overview
24
The chassis must have at least one AT-SBxPWRSYS1 Power Supply. A
single AT-SBxPWRSYS1 Power Supply can power a fully populated
chassis, but there are two slots so that you may install two power supplies
to add power redundancy to the chassis.
The two left hand slots are for the AT-SBxPWRPOE1 Power Supply,
which provides PoE for the ports on the AT-SBx81GP24 Line Card. (It
should be noted that the line card also needs the AT-SBxPWRSYS1
Power Supply to operate its switching functions.) You may install two AT-
SBxPWRPOE1 Power Supplies in the chassis to add PoE redundancy or
to increase the amount of available PoE power.