Chapter 1 Cisco XR 12406 Router Overview
Line Cards
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| MBUS | CSC |
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| SFC |
| CRITICALMAJOR | MINOR |
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| FAIL |
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| ENABLED |
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| 66170 | ||
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| 0 | 1 | 0 | 1 | 2 |
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| ALARM | |
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| 3 | 4 | 5 | 6 |
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1 | MBus status LED | 5 | Major alarm LED |
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2 | CSC status LEDs (two) | 6 | Minor alarm LED |
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3 | SFC status LEDs (three) | – | Alarm relay contact connector |
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4 | Critical alarm LED | — |
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Note The Cisco XR 12406 Router must be populated with two alarm cards, to meet EMI standards.
Alarm Output Function
The alarm output function consists of a group of relays, LEDs, and their associated drivers connected to an output port on the MBus module.
The alarm output function is controlled by the software on the route processor. When a signal is received from the route processor, the MBus module on the alarm card activates specific relays to signal an alarm condition. There are three alarm condition severity levels: critical, major, and minor. The critical, major, and minor LEDs are paired for redundancy to protect against a single failed LED.
Note Alarm cards for some Cisco XR 12000 series router have both audible and visible alarm indicators. The alarm card for the Cisco XR 12406 Router provides only visible alarm indicators as local alerts to unusual conditions in the router.
Cisco XR 12406 Router Installation Guide
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