Power Supplies - Cisco GSR12/60 - 12012 Router -AnyLAN, SONET/SDH Installation And Configuration Manual

Physical and Functional Overviews
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Switch fabric—Circuitry that carries the user traffic between line cards or between the
RP and a line card. The switch fabric on the clock and scheduler card is identical to the
switch fabric on the switch fabric card.
The switch fabric card contains only the switch fabric circuitry, which carries user traffic
between line cards or between the RP and the line cards. The switch fabric card receives
scheduling information and the system clock from the clock and scheduler card. The switch
card is keyed to occupy slots 2, 3, and 4 (lower three slots) in the lower card cage. A
minimally configured Cisco 12012 does not require a switch fabric card; however, to
maximize the bandwidth and switching capacity of the Cisco 12012, three switch fabric
cards must be installed.
Status of the cards in the lower card cage is displayed by five pairs of LEDs (one pair for
each card slot) on the alarm card in the upper card cage. Each pair of LEDs includes a green
enable LED, which indicates the clock and scheduler card (CSC) or switch fabric card
(SFC) is installed and operational, and a red fail LED, which indicates a fault has been
detected on the card installed in that slot.

Power Supplies

The power supply bay, located at the bottom of the card cage assembly, can accommodate
up to four AC-input power supplies or two dual-width DC-input power supplies.
Caution
configurations, all power supplies must be of the same type (four AC-input power supplies
or two DC-input power supplies).
Note
contained in the configuration notes Cisco 12012 Gigabit Switch Router AC-Input Power
Supply Replacement Instructions (Document Number 78-4334-xx) and Cisco 12012
Gigabit Switch Router DC-Input power Supply Replacement Instructions (Document
Number 78-4330-xx). The appropriate configuration note accompanies each AC-input or
DC-input power supply that is shipped from the factory as a FRU.
1-28 Cisco 12012 Gigabit Switch Router Installation and Configuration Guide
Do not mix power supplies in the Cisco 12012. In multiple power supply system
Detailed instructions for handling and replacing the Cisco 12012 power supplies are