Verilink DCSU 2911 (880-502647-001) Product Manual - Manual (Page 33)

DCSU T1 Craft Interface
Verilink DCSU 2911 User Manual 3-11
Alternate Timing
Options
Submenu
If the option, “Receive clock from shelf” has been selected by using
the R command from the Configuration Menu (Timing Options)
submenu, the Shelf Timing Table is displayed. (Figure 3-5)
SS Secondary Synchronization: Use this option to specify an alternate source
of timing for synchronization. If the primary source is unavailable, this
source will be used.
Net 1: Network port 1
Net 2: Network port 2
External: External clock
Internal: Internal clock
Net 3: Equipment port 1 TT signal
Net 4: Equipment port 2 TT signal
1) NET 1
2) NET 2
3) EXTERNAL
4) INTERNAL
5) NET 3
6) NET 4
TS Tertiary Synchronization: Use this option to specify an alternate source of
timing for synchronization. If the primary and secondary sources are
unavailable, this source will be used.
Net 1: Network port 1
Net 2: Network port 2
External: External clock
Internal: Internal clock
Net 3: Equipment port 1 TT signal
Net 4: Equipment port 2 TT signal
1) NET 1
2) NET 2
3) EXTERNAL
4) INTERNAL
5) NET 3
6) NET 4
PA Primary Auto Restore: Choose Yes to resynchronize to the clock
preference automatically if the clock in the node fails. Otherwise, choose
No to synchronize to other sources (secondary, tertiary) or stay down. In
case of a failure, setting up auto restore helps restore timing. If you have
not set up auto-restore to the primary source because you believe that it is
unstable; but you have chosen a secondary source; after rebooting, the
module will use the latter as the source to restore timing to the module or
shelf.
Yes or No
(Y/N)
SA Secondary Auto-Restore: Choose Yes to resynchronize to the clock
preference automatically if that clock in the node fails. Otherwise, choose
No to synchronize to other sources (primary, tertiary) or stay down.
Specifying a secondary source for clocking is useful for power failures that
result in the failure of the primary automatic restore source. Restoring
from a secondary source may take up to 60 seconds.
Yes or No
(Y/N)
TA Tertiary Auto Restore: Choose Yes to resynchronize to the clock
preference automatically if that clock in the node fails. Otherwise, choose
No to synchronize to other sources (primary, secondary) or stay down.
Specifying a tertiary source for clocking is useful if a power failure results
in the failure of the primary and secondary sources for automatic restore.
Restoring from a tertiary source may take up to 90 seconds.
Yes or No
(Y/N)
X Exit the Timing Options screen.
Command Description Options