RECOMMENDATION ITU-R S.1062-2 … ALLOWABLE ERROR PERFORMANCE FOR A HYPOTHETICAL REFERENCE DIGITAL PATH OPERATING AT OR ABOVE . ANNEX 1 1 Definitions, parameters and objectives (ITU-T Recommendation G.826) 1.1 Definitions 1.2 Parameters 1.3 Performance objectives 1.4 Monitoring blocks 2 BEP masks 2.1 Probability of the basic events 2.2 Calculation of the ITU-T Recommendation G.826 parameters for a given mask of BEP cumulative distribution 3 Relationship between BER and error-event ratio 4 Conclusions