ASR (Answer Seizure ratio) is a ratio of successful calls (successful call is a call with duration, its duration is higher than zero) to the total number of calls. A good indicator is considered to be 30-50%.
In telecommunication business the attempted call is defined by ASR parameter. The answer-seizure ratio is defined as 100 times the ratio of answered calls. the number of seizures resulting in an answer signal, divided by the total number of seizures: