ASr and CSR are deffent.
ASR=Answerd calls/ Seizured calls
If you have ofer flowin your trunks you shold add that aslo along with sezures.
CSR=Call success/Call attempts
normally in anetwork CSR will be 97%.But ASR will be between 30to 50% only. In my netwok i observed CSR of 98% and ASR 35%