Parameter Definition Formula Target Urban SMS Service Accessibility The SMS service accessibility means the probability that the end-user can access SMS center for sending SMS. SMS Service Accessibility = (Successful Access to SMS Center/Total number of SMS attempts) X100% ≥ 98% Rural ≥ 95% 3. QUALITY OF SERVICE PARAMETERS FOR MOBILE AND FIXED BROADBAND INTERNET SERVICES Every Mobile and Fixed Broadband Internet Telecommunications Operator shall meet the following Quality of Service standards set for Internet Service in respect of each specified parameter measured by test calls in any locality and shall submit a monthly report based on peak hour conditions. Table 3: Quality of Service Parameters for Mobile and Fixed Broadband Internet Services Parameter Definition Formula Target Urban Rural Mobile Internet Service Attach Failure Ratio [%] The attach failure ratio is the probability that a subscriber cannot attach to the PS network. Attach failure ratio [%] = (Unsuccessful attach Attempts/all attach Attempts) X100 ≤ 2% Attach Setup Time [s] The attach set-up time is the time period needed to attach to the PS network. Attach set-up time s = tattach complete − tattach request ≥98% of successful attach attempts Should be completed within 1 second PDP Context Activation Failure Ratio [%] The PDP context activation failure ratio denotes the probability that the PDP context cannot be activated. It is the proportion of unsuccessful PDP context activation attempts and the total number of PDP context activation attempts. PDP context Activation Failure Ratio [%] = (Unsuccessful PDP context activation attempts/All PDP context activation attempts)X100% PDP Context Activation Time [s] The PDP context activation time is the time period needed for activating the PDP context. PDP Context Activation Time [s]= (t𝑃𝐷𝑃 𝑐𝑜𝑛𝑡𝑒𝑥𝑡 𝑎𝑐𝑡𝑖𝑣𝑎𝑡𝑖𝑜𝑛 𝑎𝑐𝑐𝑒𝑝𝑡 – t𝑃𝐷𝑃 𝑐𝑜𝑛𝑡𝑒𝑥𝑡 𝑎𝑐𝑡𝑖𝑣𝑎𝑡𝑖𝑜𝑛 𝑟𝑒𝑞𝑢𝑒𝑠𝑡) [𝑠] ≥98% of successful attach attempts PDP Context Cut-off Ratio The PDP context cut-off ratio is the probability that a PDP context is deactivated without being initiated PDP context cut-off Ratio [%] = (PDP ≤ 1% 13 ≤ 3% Should be completed within 2 seconds