Cisco Systems Cisco 12008 Upper Card Cage and Associated Components, DC-Input Power Supply LEDs

Overview of the Cisco 12008

The power specifications for the DC-input power supplies, as well as the specifications of the source DC power cables for use with the Cisco 12008 router, are presented in the section entitled “DC-Powered Systems” on page 16 in Chapter 2.

DC-Input Power Supply LEDs

The DC-input power supply faceplate incorporates two LEDs (see Figure 1-7) that provide the following status indications:

•INPUT OK—When the rotary power switch is turned ON, this green LED goes on immediately, indicating that source DC power is applied and that it is within the specified operating range (–40.5 VDC to –75 VDC). If this LED does not go on when the rotary power switch is turned ON, the source DC power being applied to the power supply is not within the normal operating range or the LED is faulty.

•OUTPUT FAIL—When the rotary power switch is turned on, this LED goes on momentarily; it should then go off and remain so. If it does not go off, it indicates that the +5.2 VDC or –48 VDC being supplied to the backplane is not within tolerance.

Upper Card Cage and Associated Components

The upper card cage (see Figure 1-8) contains ten slots that accommodate the following types of cards in the quantities indicated:

•One Route Processor (RP)—A RP is a standard and required router component; the RP must be present and operational at all times. It is recommended that you install the RP in the left-most slot (slot 0) in the upper card cage.

•Either one or two clock and scheduler cards (CSCs)—One CSC is a standard and required router component; one CSC must be present and operational in the router at all times. For redundancy, you can install a second CSC for use as a backup.

Two dedicated slots in the middle of the upper card cage (CSC0 and CSC1) are reserved for the CSCs. Because the backplane connector of a CSC differs significantly from all other card types, you cannot install a CSC in any other slot.

•Cisco 12000 series line cards—From one to seven line cards of different types can be installed in the line card slots in the upper cage (slots 0 through 3 and slots 4 through 7).

Product Overview 1-23