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CiscoXR 12406 Router Installation Guide
OL-13831-01
Chapter1 Cisco XR 12406 Router Overview
Line Cards

Alarm Relay Contact Connector

The 9-pin D-type alarm relay contact connector on the faceplate of the alarm card
(see Figure1-5) is used to connect external alarm indication equipment to the
router so that alarm indicator signals in the router can be repeated elsewhere
outside the router.
The pins on this connector are tied directly to the critical, major, and minor alarm
relay contacts (normally open, normally closed, and common). Any event that
causes one of the alarm LEDs on the alarm card faceplate to go on also activates
the corresponding relay contact closure. The relay interface is rated at a maximum
of 2A, 60V, or 50VA, whichever is greater.
Because alarm contact cables are entirely dependent on site-specific
circumstances, alarm connector cables are not available from Cisco. For
information about alarm connector wiring requireme nts and the pinout for the
alarm connector interface, see the “Alarm Card Alarm Relay Connector
Specifications” section on page A-5.
Power Subsystems
The Cisco XR 12406 Router can be powered by either an AC or DC power
subsystem, as described in the following sections:
•AC Power Subsystem, page 1-16
•DC Power Subsystem, page 1-20
•Power Distribution, page1-24
Note The Cisco XR 12406 Router can be either AC powered or DC powered; the router
cannot accept two different types of power modules at the same time.
Note The enhanced XR 12406 chassis (XR-12000/6 configured with 12406/120 fabric
option) ships with redundant power supply which is required to maintain High
Availability for the system.