Verilink DIDCSU 2912, Руководство пользователя

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DIDCSU E1 Version
Verilink DIDCSU 2912 User Manual 4-9
Timing Options
Enter “T” from the E1 Port Configuration Menu to display the
Timing Options Menu :
Figure 4-6 Timing Options Menu
Use this menu to determine the transmit timing source of the
DIDCSU modules. This menu changes depending on the setting of
the
Receive clock from shelf option . Either Card Timing ( Figure
4-6 ) or Shelf Timing ( Figure 4-7 ) applies.
If the DIDCSU card derives its timing from another module in the
shelf, select Yes for the
Receive Clock From Shelf option and then
enter the slot of the module to be the timing source. This includes
the option of setting the DIDCSU as the timing source for the shelf.
If the DIDCSU is to derive its timing from one of its own ports or its
internal oscillators, and ignores the shelf timing table, select No for
the
Receive Clock From Shelf option.
Select the primary, secondary, and tertiary timing sources. The
secondary and tertiary timing sources provide a backup for the
primary source. The
Auto Restore option determines which timing
source is used when the primary timing source fails, restores, and
then remains viable for a period of 60 seconds.
If the primary source fails, the secondary source becomes the
timing source. When the primary source resumes service—and the
Auto Restore option is set to Yes—it resumes as the DIDCSU
module’s timing source. If the Auto Restore option is set to No, the
T See the section
"Timing Options",
in this chapter.
X Exit this Screen
Command Description Options
-- DIDCSU 2912 CONFIGURATION MENU (TIMING OPTIONS)-- -- DIDCSU 2912 CONFIGURATION MENU (TIMING OPTIONS)-- -- DIDCSU 2912 CONFIGURATION MENU (TIMING OPTIONS)-- -- DIDCSU 2912 CONFIGURATION MENU (TIMING OPTIONS)--
Current card timing source: INTERNAL (PRIMARY)
Current card timing source: INTERNAL (PRIMARY) Current card timing source: INTERNAL (PRIMARY)
Current card timing source: INTERNAL (PRIMARY)
Source Synchronization Auto Restore Source Synchronization Auto Restore Source Synchronization Auto Restore Source Synchronization Auto Restore
PRIMARY PS) INTERNAL PA) NO PRIMARY PS) INTERNAL PA) NO PRIMARY PS) INTERNAL PA) NO PRIMARY PS) INTERNAL PA) NO
SECONDARY SS) INTERNAL SA) NO
SECONDARY SS) INTERNAL SA) NO SECONDARY SS) INTERNAL SA) NO
SECONDARY SS) INTERNAL SA) NO
TERTIARY TS) INTERNAL TA) NO TERTIARY TS) INTERNAL TA) NO TERTIARY TS) INTERNAL TA) NO TERTIARY TS) INTERNAL TA) NO
R) Receive clock from shelf: NO R) Receive clock from shelf: NO R) Receive clock from shelf: NO R) Receive clock from shelf: NO
X) exit this screen
X) exit this screen X) exit this screen X) exit this screen
A [0.0.0.204] [1,2] DIDCSU 2912 > A [0.0.0.204] [1,2] DIDCSU 2912 > A [0.0.0.204] [1,2] DIDCSU 2912 > A [0.0.0.204] [1,2] DIDCSU 2912 >