Configuring Control Modules and System Timing
Configuring system clocking
Stinger® FS/Stinger FS+ Getting Started Guide
5-21
If the Stinger unit detects a T1 signal in the BITS input, it prioritizes the clock source
list as follows:
■
If the
system-8K-clock
parameter of the
system
profile is set to
bits
, its
priority is set to the highest (1) and the T1 framer is selected regardless of other
available clock sources and priorities.
■
If the
system-8K-clock
parameter of the
system
profile is set to a value other
than
bits
, its priority is set as the lowest (3) and the T1 framer is selected as a
clock source only if no other slot clock sources are available.
Changing the BITS clock source
The following examples show how to change the
system-8K-clock
parameter
setting from
bits
to
lim-or-trunk-module
and use the
slot-clock-source
command to view the changes in clock source priority:
admin>
set system-8k-clock = bits
admin>
write
LOG notice, Shelf 1, Controller-1, Time: 17:55:34--
Master clock source changed to T1 framer
SYSTEM written
admin> slot-clock-source
Master line: T1 framer
Source List:
Source: line 1 Available* priority: 2
Source: line 2 Available* priority: 1
Source: T1 framer Available* priority: 1
admin>
set system-8k-clock = lim-or-trunk-module
admin>
write
LOG notice, Shelf 1, Controller-1, Time: 17:56:05--
Master clock source changed to slot-1/8 line 2
SYSTEM written
admin> slot-clock-source
Master line: 2
source List:
Source: line 1 Available* priority: 2
Source: line 2 Available* priority: 1
Source: T1 framer Available* priority: 3
Using a LIM or trunk module clock source
The following commands cause the system to first attempt to use a trunk port as its
clock source, and to use the built-in clock only if it finds no ports that are eligible
clock sources:
admin>
read system
SYSTEM read
admin>
set system-8k-clock = lim-or-trunk-module