[Ignitionnet]

Codeword errors are not related to TEK / T3 beyond that downstream errors may cause TEK / T3s due to BPI+ / RNG-RSP messages being lost due to the codeword carrying them erroring.

Segmentation of downstream traffic into codewords is done by different bits of hardware and software within the line cards from those governing control messages.

Of note also is that only a limited subset of modems were experiencing instability, errored codewords would affect every modem on the line card.