Cisco Gigabit Switch Router 12008 Installation And Configuration Manual page 169

Figure 3-17 shows an expanded view of the DB-25 connector on the CSC faceplate.
Figure 3-17 Expanded View of the DB-25 Connector
Pin 25
Alarm
input
Minor
visual
contacts
Critical
visual
contacts
Major
audible
contacts
Pin 14
DB-25 Female connector
Table 3-10 lists the common, normally open, and normally closed relay contacts accessible
to an external alarm monitoring facility by means of the DB-25 connector.
Connecting an External Alarm Monitoring Facility
Pin 13
Major
visual
contacts
Minor
audible
contacts
Critical
audible
contacts
Pin 1
Installing a Cisco 12008 3-37