Chapter 10 Alarm Monitoring and Management

External Alarms and Controls

Alarm type

Alarm severity (CR, MJ, MN, NA, and NR)

Alarm-trigger setting (open or closed); open means that the normal condition is to have current flowing through the contact, and the alarm is generated when the current stops flowing; closed means that normally no current flows through the contact, and the alarm is generated when current does flow.

Virtual wire associated with the alarm

CTC alarm log description (up to 63 characters)

Note If you provision an external alarm to raise when a contact is open, and you have not attached the alarm cable, the alarm will remain raised until the alarm cable is connected.

Note When you provision an external alarm, the alarm object is ENV-IN-nn. The variable nn refers to the external alarm’s number, regardless of the name you assign.

10.6.2 External Control Output

You can provision each alarm output separately. Provisionable characteristics of alarm outputs include:

Control type

Trigger type (alarm or virtual wire)

Description for CTC display

Closure setting (manually or by trigger). If you provision the output closure to be triggered, the following characteristics can be used as triggers:

Local NE alarm severity—A chosen alarm severity (for example, Major) and any higher-severity alarm (in this case, Critical) causes output closure

Remote NE alarm severity—Similar to local NE alarm severity trigger setting, but applies to remote alarms

Virtual wire entities—You can provision an alarm that is input to a virtual wire to trigger an external control output

For information about provisioning alarms for external devices, refer to the Chapter, “Manage alarms”, Section, “Provision External Alarms and Controls” in the Cisco ONS 15310-MA SDH Procedure Guide.

 

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15310-MA specifications

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