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2. Display the DSL state information with the display dsl status command.
3. Use the debugging physical command to view details about activation, such as issuing of the
activate command, activation timeout, training process, and activation success.
4. If line activation attempts always fail, verify that the line is securely connected and functioning
correctly.
5. If bit error rate is high or interference occurs too often, shut down and then bring up the interface
by using the shutdown and undo shutdown commands. You can also reboot the device and
reconnect the line. If the problem persists, perform an overall line condition and environment
check.