Juniper MX960 Hardware Manual page 36

MX960 3D Universal Edge Router Hardware Guide
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The power supply has a PEM FAIL and OK LED; the failure LED will light up in this
scenario:
Supply is expecting two feeds (input mode switch = 1) but receiving only one active
feed
The system will generate an alarm in the following scenarios:
Supply is expecting two feeds (input mode switch = 1) but receiving only one active
feed.
Supply is expecting one feed (input mode switch = 0) but receiving two active feeds
.
NOTE:
All supplies should have the same amount of feeds activated.
The correct usage of the feed selector is required in order to get to the
desired capacity of the supplies.
Juniper Networks strongly recommends that you install Junos OS Release 8.2R2 or
later before deploying the MX960 router into service.
Junos OS Release 8.2R1 does not allow you to complete an install from the USB
dongle. Use Junos OS Release 8.2R2 instead. [PR/98563]
In Junos OS Release 8.2R1, a condition can exist where both fan trays are shut down
by the system, but the system continues to operate. This can potentially result in
serious overheating and damage to the DPCs. Use Junos OS Release 8.2R2 instead.
[PR/94692] [PR/289154]
The XFP cages and optics on the MX960 router are industry standard parts which have
limited tactile feedback for insertion of optics and fiber. You need to insert the optics
and fiber firmly until the latch is securely in place. [PR/98055]
Although the MX960 router can support any combination of 11 DPCs and the redundant
third SCB, the power supply cannot support all 12 DPCs if an Enhanced Queuing DPC
is inserted into any slot of a fully loaded chassis. The Enhanced Queuing DPCs exhibit
the following behavior:
When you insert an Enhanced Queuing DPC into slot
router, the DPC will not power on.
When you insert a DPC into slot
Queuing DPC in any slot, the DPC will not power on.
When you insert an Enhanced Queuing DPC into any slot of an MX960 router
containing a DPC already powered on in slot
power on.
of a powered-on MX960
6
6 of an MX960 router containing an Enhanced
, the Enhanced Queuing DPC will not
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