G.SHDSL Interface Configuration Commands 213ExampleDisable the ATM interface to scramble the payload.[3com-Atm4/0/0] undo scrambleG.SHDSL InterfaceConfigurationCommandsactivate Syntaxactivateundo activateViewATM interface viewParameterNoneDescriptionUsing the activate command, you can enable a G.SHDSL interface. Using the undoactivate 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. Activationrefers to the training between the G.SHDSL end and the STU-C end. Based onsuch preset items as SHDSL standard, channel mode, upstream and downstreamrates and SNR margin in link template. The training process detects line distanceand performance, negotiates between two ends and determines if the interfacecan run normally under such condition. If the training succeeds, a communicationlink is set up between two ends and the interface is activated, on which servicescan be transferred. When the interface is deactivated, no communication linkexists, so you must activate the interface again,if you want to transmit servicesover it.The commands are mainly used in link testing and fault diagnosis.The difference between the activate/undo activate command and theshutdown/undo shutdown command is that the former only functions on theG.SHDSL interface.A G.SHDSL interface is always on so it will enter the active state as long as the linkis functional. The router supports timed loop detection, so the G.SHDSL interfaceis activated when the link performance has deteriorated.
