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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 10 Alarm Monitoring and Management
External Alarms and Controls
10.5.1 Alarms Suppressed for Maintenance
When you place a port in locked, maintenance administrative state, this raises the alarm suppressed for
maintenance (AS-MT) condition in the Conditions and History windows
1
and causes subsequently raised
alarms for that port to be suppressed.
While the facility is in the locked, maintenance state, any alarms or conditions that are raised and
suppressed on it (for example, a transmit failure [TRMT] alarm) are reported in the Conditions window
and show their normal severity in the Sev column. The suppressed alarms are not shown in the Alarms
and History windows. (These windows only show AS-MT). When you place the port back into
Automatic In Service administrative state, the AS-MT condition is resolved in all three windows.
Suppressed alarms remain raised in the Conditions window until they are cleared.
10.5.2 Alarms Suppressed by User Command
In the Provisioning > Alarm Profiles > Alarm Behavior tabs, the ONS 15310-MA SDH have an alarm
suppression option that clears raised alarm messages for the node, chassis, one or more slots (cards), or
one or more ports. Using this option raises the alarms suppressed by user command, or AS-CMD
condition. The AS-CMD condition, like the AS-MT condition, appears in the Conditions, and History
1
windows. Suppressed conditions (including alarms) appear only in the Conditions window—showing
their normal severity in the Sev column. When the Suppress Alarms check box is unchecked, the
AS-CMD condition is cleared from all three windows.
A suppression command applied at a higher level does not supersede a command applied at a lower level.
For example, applying a node-level alarm suppression command makes all raised alarms for the node
appear to be cleared, but it does not cancel out card-level or port-level suppression. Each of these
conditions can exist independently and must be cleared independently.
Caution Use alarm suppression with caution. If multiple CTC or TL1 sessions are open, suppressing the alarms
in one session suppresses the alarms in all other open sessions.
10.6 External Alarms and Controls
External alarm physical connections are made with the ONS 15310-MA SDH ALARM port. However,
the alarms are provisioned using the 15310E-CTX-K9 card view for external sensors such as an open
door and flood sensors, temperature sensors, and other environmental conditions. External control
outputs on the 15310E-CTX-K9 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.
Provision external alarms in the 15310E-CTX-K9 card view Provisioning > External Alarms tab and
provision controls in the 15310E-CTX-K9 card view Provisioning > External Controls tab. Up to 32
alarm contact inputs and 8 alarm contact outputs are available with the 15310E-CTX-K9 cards.
10.6.1 External Alarm Input
You can provision each alarm input separately. Provisionable characteristics of external alarm inputs
include:
1. AS-MT can be seen in the Alarms window as well if you have set the Filter dialog box to show NA severity
events.
