ASR = Answer Seizure Ratio
ASR is a measure of network quality defined in ITU SG2 Recommendation E.411.
Its calculated by taking the number of successfully answered calls and dividing by the total number of calls attempted (seizures). Since busy signals and other rejections by the called number count as call failures, the calculated ASR value can vary depending on user behaviour.
NER = Network Efficiency Ratio
NER has been proposed as an addition to ITU E.411. It is designed to eliminate user behaviour as factor and better represent pure network performance.
Its calculated as: (Answers + User Busy + Ring No Answer + Terminal Rejects) / Total call attempts (seizures)
Unlike ASR, NER excludes the effects of customer and terminal behaviour. NER is a measure of network quality defined by the ITU.
This section is designed for any theme, as well as for all topics strongly different from the original meaning