Clock-Change Auto - HP 6600 Command Reference Manual

undo clock
Default
The clock source is line clock (slave).
Views
CE1 interface view
Default command level
2: System level
Parameters
master: Adopts the internal clock as the clock source.
slave: Adopts the line clock as the clock source.
Usage guidelines
When the CE1 interface is working as DCE, choose the internal clock (master) for it. When it is working
as DTE, choose the line clock for it.
Examples
# Use the internal clock as the clock source on CE1 interface E1 2/0/0.
<Sysname> system-view
[Sysname] controller e1 2/0/0
[Sysname-E1 2/0/0] clock master

clock-change auto

Use clock-change auto to enable the automatic clock mode change function on the interface, in other
words, configure the interface that uses the slave clock mode to switch to the master clock mode
automatically when receiving an alarm indication signal (AIS)/loss of signal (LOS)/loss of frame (LOF)
alarm. After the alarm is cleared, the interface automatically switches back to the user-configured clock
mode.
Use undo clock-change auto to disable the automatic clock mode change function. If the interface has
already switched its clock mode, this command restores the user-configured clock mode for the interface.
Syntax
clock-change auto
undo clock-change auto
Default
Automatic clock mode change is disabled.
Views
CE1 interface view
Default command level
2: System level
Examples
# Enable automatic clock mode change for interface E1 2/0/0.
<Sysname> system-view
90