Quality parameters of GSM network CSSR= 71 percent means out of 100 call attempts only 71 are successful while 29 attempts failed CDR= 7 percent means out of 100 calls established 7 calls will be dropped before any of the calling parties terminates Total N of completed calls /total N of call attempts (A good parameter to measure the network accessibility and retainability as perceived by the customer) the indicator measures the success of hand over and it is collerated w ith the CDR it measures the relative ease by which the c ustomer sieze a TCH (the higher the value the difficulty of making a call)
sed for the assessing the performance of networks.
getting on the network stayig on the network having a good service experience while using the network the percentage of coverage for the network referring to the total area of the network
