3Com Router 3031, Command Reference Manual

Page: 209 / 838

ATM 25M Interface Configuration Commands 209
Parameter
None
Description
Using the scramble command, you can enable scrambling function of ATM E3/T3
interface. Using the undo scramble command, you can disable the scrambling
function.
By default, the scrambling function of ATM E3/T3 interface is enabled.
The scramble command is used to enable the scramble and descramble function
on payload, with no influence on the cell header.
Example
Disable the scramble function of ATM E3/T3 interface 2/0/0.
<3com> system-view
[3com] interface atm 2/0/0
[3com-Atm2/0/0] undo scramble
ATM 25M Interface
Configuration
Commands
clock
Syntax
clock { master | slave }
undo clock
View
ATM interface view
Parameter
master: Adopts the internal clock mode.
slave: Adopts the line clock mode.
Description
Using the clock command, you can set the clock mode on an ATM interface. Using
the undo clock command, you can restore the default clock mode on the
interface.
By default, the ATM interface adopts the slave clock.
When an ATM interface is working as DCE, choose the master clock mode. When
it is working as DTE, choose the slave clock mode for it. When ATM interfaces of
two routers are directly connected by fiber, one end should be configured with the
master clock mode and the other with the slave clock mode.