This is the day's running total of Errored Seconds reported back by the remote SONET terminal, accumulated since the start of the current day via far-end block error indications. Tracking this daily figure lets an admin see whether outbound signal quality toward the remote site is degrading gradually over a full day, a pattern that's easy to miss when only checking the current 15-minute snapshot. A far-end CurrentDay total of 400 against the same 200-second default daily ES threshold used on the near-end side would flag a day-long problem specifically affecting the direction toward the remote terminal.