STM-1 Line > SDH Thresholds
The STM-1 Line > SDH Threshold subtab allows you to view the SDH thresholds for the optical line of the OSC-CSM and OSCM cards.
 
Item
Description
Port
Displays the port number.
EB
Errored block indicates that one or more bits are in error within a block.
ES
Displays the number of errored seconds. An errored second is a one-second period with one or more coding violations at that layer or one or more incoming defects at that layer.
SES
Displays the number of severely errored seconds. A severely errored second is a one-second period with x or more coding violations at layer one or more incoming defects at that layer. The value of x depends on the line rate and bit error rate.
BBE
Background block error is an errored block not occurring as part of an SES.
UAS
Displays the unavailable seconds.
Directions
Select near end or far end for the PM direction.
Intervals
Select 15 Min or 1 Day for the PM interval.
Types
Select MS (multiplex section), RS (regenerator section), or Path, where applicable.
Refresh
Refreshes the thresholds display.
Apply
Applies changes made to the fields in the tab.
Reset
Cancels any changes to the tab and returns the fields to their last-saved settings.
Help
Displays context-sensitive help.
 

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