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Chapter 4 Turning on the Avaya P460
20 Avaya P460 Installation and Maintenance Guide
Powering Up
In order to turn on the chassis you need to install at least one PSU and at least one
Supervisor Module.
L The fans are on whenever the power is on in the chassis, whether Supervisor
Modules are installed or not.
Turning on a Chassis with Supervisor and I/O Modules Already Inserted
If you have inserted Supervisor module(s) and I/O module(s) into the chassis before
turning on the PSUs, the power-up procedure is as follows:
1 The Supervisor module(s) and fans are turned on automatically when the PSUs
are turned on.
2 The Supervisor module will turn on the modules one by one, verifying that
there is enough power budget in the system first. If there are two Supervisor
modules, the Active Supervisor Module perfoms this procedure.
Turning on a Chassis with a Supervisor Module Only
L The fans are on whenever the power is on in the chassis, whether Supervisor
Modules are installed or not.
If you turn on the PSU(s) in a chassis with a Supervisor Module, the power-up
procedure is as follows:
1 The fans start.
2 The supervisor module is turned on.
X You can now insert I/O Modules
Turning on a Chassis with no Modules
If you turn on the PSU(s) in an empty chassis – no Supervisor modules – the fans
will start up.
Inserting an Additional PSU
1 The SPV adds the new PSU power budget and checks how many PSUs are
present in the chassis
2 Modules not powered up because of an insufficient power budget are turned
on. Otherwise the new PSU power is just added to the total available power.
3 The PSU you insert are in redundant mode if the existing PSUs can already
provide enough power for the chassis and installed components.