Section 12 in Regulation on Quality of Service of Basic and Cellular Mobile Telephone Services, 2005
12. Call Completion Rate:- (CCR) Call completion rate is defined as the ratio of the number of completed calls to the number of call attempts. Not all call attempts result in effective calls i.e. called party answers. A variety of reasons such as called line busy, no answer and congestion in the network as well as subscriber behaviour like premature release wrong dialing etc. are responsible for the failure. Congestion or blocking occurs due to either node or link congestion in the network due to paucity of resources both hardware and software to handle the call.
