ITU-T Rec. G.821 Corrigendum 1 (07/2001) Error performance of an international digital connection operating at a bit rate... Summary Source FOREWORD Error performance of an international digital connection operating at a bit rate below the primary rate and forming part... CORRIGENDUM 1 1 Introduction 1.1 Impact of SES definition on Annexes A and B 1.2 Impact of loss of signal (LOS) and alarm indication signal (AIS) on SES definition 2 Resolved defects 2.1 SES definition 2.2 Annex A - Criteria for entry and exit for the unavailable state A.1 Criteria for a single direction A.2 Criterion for a bidirectional connection A.3 Criterion for a unidirectional connection A.4 Consequences on error performance measurements 2.3 Annex B