Setting this OID to audioAlarmActiveNever (1) will disable
the audio alarm on the MasterSwitch VM.
Setting this OID to audioAlarmActiveOnOverload (2) will
activate the audio alarm on the MasterSwitch VM when an
overload condition is present.
Setting this OID to audioAlarmActiveOnOverloadImminent (3)
will activate the audio alarm on the MasterSwitch VM when
the load on the MasterSwitch VM has surpassed the
sPDUMasterConfigVMHighLoadWarningThreshold OID value.