This corrigendum addresses interoperability issues identified with the operation of ADSL  in the TCM-ISDN environment as defined in Annex C. The corrigendum clarifies two things to improve  interoperability:

–   the definition of the dummy bit insertion for the fast data using single latency path

–   the PRD sequence generator in single bitmap operation.

The corrigendum also corrects an editorial mistake on Figure C.20, which should be replaced  with Figure C.17 of ITU-T Rec. G.992.2.