3Com Router 3031, Command Reference Manual

Page: 213 / 838

G.SHDSL Interface Configuration Commands 213
Example
Disable the ATM interface to scramble the payload.
[3com-Atm4/0/0] undo scramble
G.SHDSL Interface
Configuration
Commands
activate Syntax
activate
undo activate
View
ATM interface view
Parameter
None
Description
Using the activate command, you can enable a G.SHDSL interface. Using the undo
activate command, you can disable a G.SHDSL interface.
By default, a G.SHDSL interface is active.
A G.SHDSL interface must be activated before it can transmit services. Activation
refers to the training between the G.SHDSL end and the STU-C end. Based on
such preset items as SHDSL standard, channel mode, upstream and downstream
rates and SNR margin in link template. The training process detects line distance
and performance, negotiates between two ends and determines if the interface
can run normally under such condition. If the training succeeds, a communication
link is set up between two ends and the interface is activated, on which services
can be transferred. When the interface is deactivated, no communication link
exists, so you must activate the interface again,if you want to transmit services
over it.
The commands are mainly used in link testing and fault diagnosis.
The difference between the activate/undo activate command and the
shutdown/undo shutdown command is that the former only functions on the
G.SHDSL interface.
A G.SHDSL interface is always on so it will enter the active state as long as the link
is functional. The router supports timed loop detection, so the G.SHDSL interface
is activated when the link performance has deteriorated.