ABR: Answer to Bid Ratio - Answered Calls divided by Attempted Calls in a given time period.
ASR: Answer to Seizure Ratio - Answered Calls divided by voice circuits successfully captured.
CSR: Call Success Ratio - successful call signals divided by attempted call signals; provides a good determination for how well network signaling is working.
CST: Call Setup Time - Defined as: time from last dialed digit to reception of Ringing Tone, is sometimes also referred to as Post Dialed Delay. For a well dimensioned network this figure of merit should be 150 ms or less.
