Primus ADSL2+ plans provide the maximum speed possible, dependent on certain physical restraints that might exist at your location. The maximum line speed for ADSL2+ plans is in excess of 20Mbps or 20000Kbps but is dependant on the distance you are from the telephone exchange, the length and quality of your copper phone line, your modem and other environmental factors. So your actual speed will be somewhere from a minimum of 10000Kbps to a maximum in excess of 20000 Kbps.