Electronic and Postal Communications (Quality of Service) G.N. No. 416 (contd) bound specified for Real-time, highly interactive applications sensitive to jitter is 100ms. 3 Ratio of packets lost to the total packets transmitted between two designated points. Loss Ratio (ITU-T Rec. Y.1541). Loss ratio for each class of service: <10-3 4 Unsuccessful data transmission ratio The ratio of unsuccessful data % Unsuccessful data <10-3 transmissions to the total number of transmission (measured data transmission attempts in a as per ETSI EG 202 specified time period. A data 057-4) transmission is successful if a test file is transmitted completely and with no errors. 5 Data transmission speed achieved The data transmission rate that is -Maximum data Data transmission achieved achieved separately for downloading transmission rate in should be at least 80% of that and uploading specified test files kbit/s achieved; advertised by the service between a remote web site and a -Minimum data provider. user’s computer. transmission rate in kbit/s achieved; -mean value and standard deviation of the transmission rate in kbit/s achieved; (ETSI EG 202 057-4) 20