 SuperJanet4 saw the implementation of a 2.5 Gbit/s core backbone from which connections to regional network points of presence were made at speeds ranging between 155 Mbit/s to 2.5 Gbit/s depending upon the size of the regional network.In 2002 the core SuperJanet4 backbone was upgraded to 10 Gbit/s.SuperJanet4 also saw an increase in the userbase of the JANET network, with the inclusion of the Further Education Community and the use of the SuperJanet4 backbone to interconnect schools' networks.