Hello, friend!
Run the config command to enter global config mode, run the interface adsl command to enter ADSL mode, and then run the adsl selt command to start the ADSL SELT.
To start the SELT on port 0/2/0, do as follows:
huawei(config-if-adsl-0/2)#adsl selt
{ portid<U><0,31> }:0
{ <cr>|calculate<K>|loop-gauge<K>|qln<K>|uer<K> }:
Command:
adsl selt 0
Thanks!