16-13
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 16 Alarm and TCA Monitoring and Management
16.6 External Alarms and Controls
16.6 External Alarms and Controls
External alarm inputs can be provisioned on the Alarm Interface Controller–International (AIC-I) card
for external sensors such as an open door and flood sensors, temperature sensors, and other
environmental conditions. External control outputs on these two cards allow you to drive external visual
or audible devices such as bells and lights. They can control other devices such as generators, heaters,
and fans.
Up to 12 external alarm inputs and four external controls are available with the AIC-I card. If you also
provision the alarm extension panel (AEP), there are 32 inputs and 16 outputs. The AEP is compatible
with the ONS 15454 ANSI shelf only. It is not compatible with the ONS 15454 ETSI shelf.
16.6.1 External Alarms
You can provision each alarm input separately. Provisionable characteristics of external alarm inputs
include:
• 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).
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.
16.6.2 External Controls
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.
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