SDH Thresholds (Electrical Cards)
Use the SDH Thresholds tab to provision ONS 15454 SDH electrical card SDH thresholds. (Thresholds are not displayed until a circuit is created.) For a list of ONS nodes and cards that support this subtab, see Provisioning.
 
Near End
Select Near End and click Show Thresholds to display the near end thresholds.
Far End
Select Far End and click Show Thresholds to display the far end thresholds.
15 Min
Select 15 Min and click Show Thresholds to enter threshold information for a generation of 15-minute threshold crossing alerts (TCAs).
1 Day
Select 1 Day and click Show Thresholds to enter threshold information for a generation of 1-day TCAs.
VC LO
Select VC LO and click Show Thresholds to display the virtual container (VC) low order (LO) thresholds.
VC4
Select VC4 and click Show Thresholds to display the VC4 thresholds.
Show Thresholds
Shows selected thresholds.
Reset to Default
Resets the threshold values to the node default threshold values.
Port
Displays the port number.
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 1 or more incoming defects at that layer. The value of x depends on the line rate and bit error rate.
EB
Errored block indicates that one or more bits are in error within a block.
UAS
Displays the unavailable seconds.
BBE
Background block errors are errored blocks that do not occur as part of an SES.
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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