Alarm Contact Connections - Cisco ONS 15454 Hardware Installation Manual
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Installing the ONS 15454 M12 (ANSI and ETSI) Shelf
Alarm Contact Connections
Figure 53: ONS 15454 ANSI Backplane Pinouts
Alarm Contact Connections
The alarm pin field supports up to 17 alarm contacts, including four audible alarms, four visual alarms, one
alarm cutoff (ACO), and four user-definable alarm input and output contacts.
Audible alarm contacts are in the LOCAL ALARM AUD pin field and visual contacts are in the LOCAL
ALARM VIS pin field. Both of these alarms are in the LOCAL ALARMS category. User-definable contacts
are in the ENVIR ALARM IN (external alarm) and ENVIR ALARM OUT (external control) pin fields. These
alarms are in the ENVIR ALARMS category; you must have the AIC-I card installed to use the ENVIR
ALARMS. Alarm contacts are Normally Open (N/O), meaning that the system closes the alarm contacts when
the corresponding alarm conditions are present. Each alarm contact consists of two wire-wrap pins on the
shelf backplane. Visual and audible alarm contacts are classified as Critical, Major, Minor, and Remote.
Figure
Cisco ONS 15454 Hardware Installation Guide
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