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Cisco ONS 15600 Reference Manual, R7.2
Chapter 11 Alarm Monitoring and Management
11.5.1 Alarms Suppressed for Maintenance
11.5.1 Alarms Suppressed for Maintenance
When you place a port in OOS,MT administrative state, this raises the alarm suppressed for maintenance
(AS-MT) alarm in the Conditions and History windows
1
and causes subsequently raised alarms for that
port to be suppressed.
While the facility is in the OOS,MT 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 IS,AINS
administrative state, the AS-MT alarm is resolved in all three windows. Suppressed alarms remain raised
in the Conditions window until they are cleared.
11.5.2 Alarms Suppressed by User Command
In the Provisioning > Alarm Profiles > Alarm Behavior tabs, the ONS 15600 has 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 alarm. The
AS-CMD alarm, like the AS-MT alarm, 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 alarm 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.
Note
When an entity is put in the OOS,MT administrative state, the ONS 15600 suppresses all standing alarms
on that entity. All alarms and events appear on the Conditions tab. You can change this behavior for the
LPBKFACILITY and LPBKTERMINAL alarms. To display these alarms on the Alarms tab, set the
NODE.general.ReportLoopbackConditionsOnPortsInOOS-MT to TRUE on the NE Defaults tab.
11.6 External Alarms and Controls
External alarm inputs are used for external sensors such as open doors and flood sensors, temperature
sensors, and other environmental conditions. External control outputs 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.
You provision external alarms and controls in the node view Maintenance > Alarm Extenders window.
Up to 16 external alarm inputs and 16 external controls are available. The external input/output contacts
are located on the CAP attached to the ONS 15600 backplane.
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.