Transfer of data over ATM networks using available bit rate (ABR)

The paper contributes to currently debated key issues on the evolution of ATM networks and their standardisation. It takes the view that since the asynchronous transfer mode has features of both circuit and packet switching, one has to selectively draw benefits for different types of traffic, compromising, if necessary, the integration principle. The use of the available bit rate (ABR), promoted by the ATM Forum for handling time insensitive (best effort) traffic, is fully adopted and its influence on switching discussed in detail. Coupled with ABR for transmission, the paper supports the employment of massive memory within the switching equipment. By suggesting solutions to key memory management problems, it also examines the use of X.25-like flow and congestion control, selectively employed for data transfer over ATM networks.