Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 72

Overview of the Cisco 12008
Figure 1-14
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Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
CSC Alarm Monitoring Facilities
DB-25 alarm contact connector
Alarm cutoff/lamp test button
System alarm LEDs
Status LEDs for the CSC
Status LEDs for each fan tray
Status LEDs for SFCs