Corrigendum 1 to Recommendation ITU-T K.44 contains technical changes. Some changes were missed in the updating of ITU-T K.44 and some additional problems were noticed after approval. This corrigendum resolves defects in the following categories: editorial errors technical errors, such as omissions and inconsistencies ambiguities In addition, the corrigendum may include explanatory text found necessary as a result of interpretation difficulties apparent from the defect reports. This corrigendum resolves defects in the following categories: editorial errors technical errors, such as omissions and inconsistencies ambiguities In addition, the corrigendum may include explanatory text found necessary as a result of interpretation difficulties apparent from the defect reports.