Theme: Data transmission based on channel and packet switching

Connection refused

2-picture. Connection refused

Connection requests are not always successful.

If the path between the calling and called subscribers are no free channels or called basic node is busy, the malfunction occurs in the connection setup.

The advantage of circuit switching

Circuit switching technology is aimed at minimizing the accidental events in the network, ie a technology. In order to avoid any possible uncertainty much of the work on information exchange is carried out in advance, even before the start the data transfer. First, for a given address, the availability of the required basic channels all the way from the sender to the recipient. But in the case of bursty, this approach is inefficient, since 80% of the time channel may be idle.