Electronic and Postal Communications (Quality of Service) G.N. No. 416 (contd) ________ SECOND SCHEDULE ________ (Made under Regulation 9) _______ QUALITY OF SERVICE PARAMETERS FOR MOBILE TELEPHONE SERVICES S/NO Definition 1 Percentage of test route over which a minimum signal strength of -100 dBm is achieved 2 Network availability gives an indication about the downtime of the MSC/BS but excludes all planned service downtime for any maintenance or software upgrade work. 3 Percentage of unsuccessful calls. An unsuccessful call is call attempt to a valid number, while in a coverage area, where neither the call is answered nor the called party busy tone nor ringing tone is recognized at the access of the calling user within 40 seconds from the instant when the last digit of the destination subscriber number is received by the network. 4 The call set up time can be defined as the time interval from the instant the user initiates a connection request until the complete message indicating call disposition is received by the calling terminal. Measurement Service Coverage Road/In door signal strength test (Measurement to be made as per ETSI EG 202 057-3) Network Availability (Measurement to be made as per ETSI EG 202 057-3) Blocked Call Rate Percentage of unsuccessful calls. Probability of end-to-end blocking (ITU-T Rec. E.771) Target Values In door: ≥ -85% : Out door: ≥ -95% Above 99% SDCCH congestion: < 0.5% TCH Congestion: < 2% The average target value for the probability of blocking on radio links: 10-2 (Measurements to be made as per ETSI EG 202 057-3) Call Set-up Time Post Selection Delay: Mean value (in seconds) (ITU-T Rec. E.771) (Measurement to be made as per ETSI EG 202 057-3) 13 The average target value for the probability of blocking on PLMN-to-fixed network: 5*10-3 The mean value of the Post Selection Delay at normal load: Mobile to Mobile: 8.5 sec ; Mobile to Fixed: 5.5sec