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Cisco 7401ASR Installation and Configuration Guide
OL-5419-01 B0
Chapter 2 Rack-Mounting, Tabletop Installation, and Cabling
Attaching the Alarm Port Cable
Attaching the Alarm Port Cable
Figure 2-15 Connecting the Alarm Port Cable
If you have an alarm system, attach the alarm cable to the Cisco 7401ASR router alarm port. The alarm
port cable is not provided by Cisco Systems. Insert the cable connector into the alarm port. The cable
connector cannot be incorrectly inserted into the alarm port.
The alarm port is used to monitor fatal or severe errors that cause Cisco IOS to crash. The alarm port is
connected to a normally closed solid state relay. Cisco IOS writes to a hardware port and the relay
contact opens. If the system enters into a ROMmon or watchdog reset state, the relay contacts close. The
closing contacts alert the alarm annunciator or monitor that a Cisco IOS crash has occurred.
If interfaces fail or other non-fatal errors occur, the alarm port does not respond. Continue to use SNMP
to manage these types of errors.
For alarm port specifications, see Appendix A, “Specifications,” the “Alarm Port” section on page A-9.
Using the Cable-Management Bracket
Figure 2-16 Securing Interface Cables through the Cable-Management Bracket
Secure port adapter interface cables and input/output cables by placing them through the
cable-management bracket.
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