This counts the total number of bit errors detected during 2047-pattern DS0 far-end testing on this port. This is the primary pass/fail metric for a DS0 far-end BERT run on this specific channel; a nonzero count over the test duration is direct, quantified evidence of a bit-level fault on that single 64 Kbps channel. A 24-hour BERT run on this DS0 channel returning a pportDS0BitErrorCount of 3 against billions of bits transmitted would generally be considered a passing, low-error-rate result for that channel.