4 Cisco 12012 Gigabit Switch Router Switch Fabric Cards Replacement Instructions
Safety Guidelines
Lower Card Cage Status LEDs
There are no status LEDs on the clock and scheduler card or switch fabric card, and the lower card
cage slots are hidden behind the air filter. Status for the lower card cage slots is displayed on five
pairs of LEDs located on the alarm card (installed in the rightmost slot in the upper card cage). Each
pair of LEDs displays the status of one slot in the lower card cage (refer to Figure 2) as follows:
• Enabled—When this green LED is on, the card installed in that lower card cage slot is recognized
by the system and functioning correctly. When the LED is off, either the slot is empty or the card
installed in the slot is faulty.
• Fail—When this red LED is on, a fault has been detected in the card installed in that lower card
cage slot. During normal operation, the fail LED should remain off.
Figure 2 Lower Card Cage Status LEDs on the Alarm Card
Safety Guidelines
Before you begin this installation, review the safety guidelines in this section to avoid injuring
yourself or damaging the equipment.
In addition, review the safety warnings listed in the document Regulatory Compliance and Safety
Information for the Cisco 12012 Gigabit Switch Router (Document Number 78-4347-xx) that
supports your Cisco 12012 before installing, configuring, or maintaining the router.
Safety with Equipment
The following guidelines will help ensure your safety and protect the equipment. This list is not
inclusive of all potentially hazardous situations, so be alert.
• Always disconnect all power cords and interface cables before moving the system.
• Keep tools and components away from walk areas.
• Do not work alone if potentially hazardous conditions exist.
• Do not perform any action that creates a potential hazard to people or makes the equipment
unsafe.
• Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
H10900
Pin 25
ACO/LT
ALARM
CSC
0
FAIL
1
0
1
2
ENABLED
CRITICAL
MAJOR
MINOR
SFC
Audio alarm
cutoff switch
Pin 25
Pin 1
Critical, major, and
minor alarm LEDs
Clock and scheduler card
and switch fabric card LEDs
ALARM 2ALARM 1
CSC
0
FAIL
1
0
1
2
ENABLED
CRITICAL
MAJOR
MINOR
Pin 1
SFC
