Found this forum searching for an answer to my H4 hdsl issue.
This circuit is taking 1 ES every minute. Pairs meter clean, no BT, loads, or other cable faults. At the doubler tried new card & slot & it still fails. Tried all the spares in the same 100 pair group & same thing. Fail. Tried changing to regular adtran & pair gain & it still takes the incremental ES.
Went to the main splice before the doubler & same issue.
Don't know what to do now. It's been 3 days & no solution. Something seems to be interfering with the 100 pair group, but what? I did try to test 2 other pairs in a different 100 pair group & it did pass the powerlid, but I can't use them since they don't go to my terminal & also they are reserved for a service order.