Page 472 7450 ESS OS Basic System Configuration Guide
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A:ALA-12
sync-if-timing
Syntax sync-if-timing
Context show>system
Description This command displays synchronous interface timing operational information.
Output System Timing Output — The following table describes sync-if-timing output fields.
Label Description
System Status CPM
A/B
Indicates the present status of the synchronous timing equipment sub-
system (SETS).
Not Present — Only shown on systems without central clocks (7750
SR-1 and 7450 ESS-1)
Master Freerun — The clock is in free-run because it hasn’t had a qual-
ified input reference to lock to
Master Holdover — The clock was locked to an input reference but has
lost all qualified input references and is in holdover.
Master Locked — The clock is locked to an input reference
Acquiring — The clock is training to a qualified input reference.
Reference Input
Mode
Revertive — Indicates that for a re-validated or a newly validated
reference source which has a higher priority than the currently selected
reference has reverted to the new reference source.
Non-revertive — The clock cannot revert to a higher priority
clock if the current clock goes offline.
Quality Level
Selection
Indicates whether the ql-selection command has been enabled or dis-
abled. If this command is enabled, then the reference is selected first
using the QL value, then by the priority refrence order. If this com-
mand is not enabled, then the reference is selected by the priority refer-
ence order.
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