External Alarms; External Controls; Virtual Wires - Cisco ONS 15454 DWDM Installation And Operation Manual

20.7.1 External Alarms

20.7.1 External Alarms
You can provision each alarm input separately. Provisionable characteristics of external alarm inputs
include:
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Note
Note

20.7.2 External Controls

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

Provisioning the AIC and AIC-I card provides a "virtual wires" option used to route external alarms and
controls from different nodes to one or more alarm collection centers. In
at Nodes 1, 2, 3, and 4 are assigned to Virtual Wire #1, and Virtual Wire #1 is provisioned as the trigger
for an external bell at Node 1.
Cisco ONS 15454 DWDM Installation and Operations Guide, R4.7
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Alarm Type—List of alarm types.
Severity—CR, MJ, MN, NA, and NR.
Virtual Wire—The virtual wire associated with the alarm.
Raised When—Open means that the normal condition is no current flowing through the contact, and
the alarm is generated when current does flow; closed means that normal condition is to have current
flowing through the contact, and the alarm is generated when current stops flowing.
Description—CTC alarm log description (up to 63 characters).
If you provision an external alarm to raise upon an open contact before you physically connect
to the ONS equipment, the alarm will raise until you do create the physical connection.
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.
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
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remote alarms.
Virtual wire entities—You can provision an alarm that is input to a virtual wire to trigger an
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external control output.
Chapter 20 Alarm Monitoring and Management
Figure 20-6, smoke detectors
September 2004