The results of any special test will be placed on this web site. Inter-switch blocking relates to blocking between wire centers. Those switches that have a large volume of traffic are tied together with what are called trunks. Most calls can be routed through different paths to get to the same destination, much like you can take different routes in your car to travel from point A to point B. Blocking is measured from the switch that originates the call to the destination switch. Counting devices on the switch record important blocking information.
Telecommunications carriers monitor the traffic report on a monthly basis.
If blocking is occurring, the number of trunks can be adjusted. A telecommunications carrier is required to report to the PUC those trunk groups that do not meet standard during each month. These results will be posted on this web site. A maximum of one percent of the calls may encounter a busy signal. This standard sets the maximum time that a customer should wait to talk to a representative when ordering new service.