ASR is a measure of network quality defined in ITU SG2 Recommendation E.411: “International network management - Operational guidance”.
ASR gives the relationship between the number of successful calls to the total number of calls. It is usually calculated by dividing 1) the number of seizures (calls) resulted in an answer signal 2) by overall number of seizures 3) and multiplying the result by 100. Since busy signals and call rejections count as call failures, the calculated ASR value can vary with user behavior.
In addition to the conventional method of computing ASR explained in the ITU Recommendation E.411, MVTS Pro offers ASR computed in the MVTS-specific way. Unlike in conventional ASR, the MVTS-specific method of ASR calculation treats busy and no answer call rejections as successful calls rather than call failures. By this means the MVTS-specific ASR is deemed to provide a more accurate quality of service metric.
Both the MVTS II and MVTS Pro applications compute ASR as a direct measure of service quality offered by the dial peer. The MVTS II application allows the carrier to adjust ASR computation to the existing operational requirements.
