History
The History tab displays historical alarm data for the Cisco ONS network (network view), node (node view), or card (card view). It also displays conditions, which are Not-Alarmed activities such as timing changes and threshold crossings. For example, protection-switching events or performance-monitoring threshold crossings appear here. The node can store up to 640 critical alarm messages, 640 major alarm messages, 640 minor alarm messages, and 640 condition messages. When any of these limits is reached, the node discards the oldest events in that category.
Tip: Double-click an alarm to display the node or card where the alarm occurred. For example, double-clicking a node alarm takes you to node view; double-clicking a card alarm takes you to card view.
The following table describes the subtabs, columns, and buttons on the History tab.
 
Item
Description
Session subtab
(Node view [single-shelf mode], shelf view [multishelf mode], or card view only) Displays alarms and conditions that occurred during the current session.
Shelf subtab
(Node view [single-shelf mode] only) Displays alarms and conditions that occurred for the node.
Node subtab
(Shelf view [multishelf mode] only) Displays alarms and conditions that occurred for the node.
Card subtab
(Card view only) Displays alarms and conditions that occurred for the card.
Date
Date and time of the alarm or condition.
Node
(Network view only) Node where the alarm or condition occurred.
Object
TL1 access identifier (AID) for the alarmed object. For HPmon or LPmon alarms, the object.
Eqpt Type
(Does not appear for all cards.) If the alarm is raised on a card, displays the card type.
Shelf
(Network view only) Shows where a multishelf alarm or condition occurred.
Slot
(Does not appear on all cards.) If the alarm is raised on a card, displays the slot where the alarm or condition occurred.
Port
If the alarm is raised on a card, the port where the alarm or condition was raised. For HPTerm and LPTerm, the port refers to the upstream card it is partnered with.
Wavelength
Wavelength is a provisionable parameter on the port entity. If a wavelength is provisioned that does not match PPM capability, a PROV-MISMATCH alarm occurs. Wavelength is displayed for DWDM, MRC (ONS 15454 SDH only), and ASAP (ONS 15600 SDH only) cards.
Path Width
The path width column is populated if a path-level alarm occurs.
Sev
The alarm or condition severity level: CR (Critical), MJ (Major), MN (Minor), NA (Not Alarmed), or NR (Not Reported).
ST
The alarm or condition status: T (transient), R (raised), or C (cleared).
SA
When checked, indicates a service-affecting alarm or condition.
Cond
The error message, alarm, or condition name.
Description
Description of the alarm or condition.
Direction
Displays the direction (receive or transmit) of the alarm in alarm history and is relative to the entity (node, card, slot, or port) identified by the AID (entity identifier).
Location
Displays the location (far, near, or N/A) of the alarm in alarm history and refers to the entity (node, card, slot, or port) identified by the AID (entity identifier). Near-end refers to alarm occurring at the identified entity, and far-end refers to alarm occurring at a distant entity connected to the identified entity.
Num
An incrementing count of alarm or condition messages. (The column is hidden by default; right-click a column and choose Show Column.)
Ref
The reference number assigned to the alarm or condition. (The column is hidden by default; right-click a column and choose Show Column.)
Retrieve
(Does not display on all tabs) Requests the current set of alarms or conditions from the network. The History tab is not updated when conditions change; therefore, you must click Retrieve to see any changes. On the Node or Card subtab, you can check the Alarms and Events check boxes to display only alarms, only events, or both.
Filter
Displays the History Filter dialog box that allows you to filter the display of alarms and conditions.
Turns the filter on or off. CTC retains that last filter activation setting. For example, if you turn the filter on and then log out, CTC keeps the filter active the next time you log in.
Alarms
(Node view [single-shelf mode], shelf view [multishelf mode], or card view only) If checked, displays node or card alarms.
Events
(Node view [single-shelf mode], shelf view [multishelf mode], or card view only) If checked, displays node or card events.
Help
Displays CTC context-sensitive help.
The table below lists the colors that appear on the History tab to identify alarm and condition severities.
 
Color
Description
Red
Raised Critical (CR) alarm
Orange
Raised Major (MJ) alarm
Yellow
Raised Minor (MN) alarm
Magenta
Raised Not Alarmed (NA) condition
Blue
Raised Not Reported (NR) condition
White
Cleared (C) alarm or condition

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