What is Blocking

Module by: Nos'milo Dlamini

Summary
Providing sufficient equipment to carry all traffic that could be offered in a telecommunications system would be very uneconomical.As a result of this, telecommunications systems are likely to experience problems at times where a call will not be able to get through. This phenomenon is termed blocking. Certain amounts of the measure of blocking are aceptable in such systems since it is impractical for telecommunication providers to provide sufficient equipment to carry all possible traffic.

Definition
Blocking in telecommunication systems is when a circuit group if fully occupied and unable to accept further calls [1]. It also referred to as congestion.