The effect of optimized devices on the performance of a token ring network interface

Results are presented regarding the performance of a token ring network interface adapter, incorporating devices optimized for the network interface application. Previous work has demonstrated the performance improvements possible by using adapter bypass circuitry in the physical layer of the adapter. Here, the operating speed of the token ring is extended by using state-of-the-art device technologies, with devices optimized for this application. The operating speed performance limit of the token ring achievable with these technologies is determined. Three technologies, GaAs, ECL, and high-speed CMOS, are studied. The operating speed limits of the adapter are determined using each of these three technologies. It is shown that the limit is much higher than that presently used.<>