Electronic and Postal Communications (Quality of Service) G.N. No. 416 (contd) _______ FIRST SCHEDULE ________ (Made under Regulation 8) QUALITY OF SERVICE PARAMETERS FOR PSTN SERVICES S/No Definition 1 Measurement Supply time for initial connection The duration from the instant a valid service order being received - % of orders completed by the by a direct service provider to the date agreed with the customer; instant a working service is made available for use. This includes (Measurement to be made cases where a new access line is according to ETSI EG 201 769installed; an existing access line is 1) taken over by another customer; or an upgrade on the existing line. 2 The period starting when the address information required for setting up a call is received by the network (e.g. recognized on the calling user’s access line) and finishing when the called party busy tone or ringing tone or answer signal is received by the calling party. Local call set-up time (s) Post Selection Delay (in seconds) [ITU-T Rec. E.721] Mean value (in seconds) (Measurements to be made according to ETSI EG 201 7691) Target Values - 80% within 24 hrs; - 90% within 48hrs; 100% within 7 business days. The mean value of the Post Selection Delay (en bloc) at normal load should be 3.0sec Mean value of local call set-up time: < 3sec Mean value of toll call set-up time: < 5sec 3 Ratio of unsuccessful calls to the total number of call attempts in a specified time period. An unsuccessful call is call attempt to a valid number, properly dialed following dial tone, where neither called party busy tone, ringing tone, nor answer signal is recognized on the access line of the calling user Unsuccessful Call Ratio Probability of end-to-end blocking (ITU-T Rec. E.721); Percentage of unsuccessful calls. (Measurements to be made according to ETSI EG 201 7691) Call Completion Ratio: (CCR) 9 The mean value for probability of endto-end blocking at normal load should be 2% Local/Onnet/Intraoffice calls