I have 2 questions:(at least answer on question) 1) What is an amplifier? Is amplifier or a booster are same thing? What does an amplification do with signals? If an booster/amplifier is connected in a DSL line so will it amplify DSL connection to get better speed? 2) How to make a portable booster that boost DSL speed at least what components I must needed of what values? As phone lines have 9volts in their. Actually I have 1mbps of DSL connection while I don't get full speed(1mbps) or even not half(512kbps) not even 150(kbps). Sometimes my modem try to catch signals but it fails, sometimes I got 100kbps, sometimes 110kbps.......... I heard someone that use a booster between your phone line and phone(as my DSL is activated on my phone line) so you could be able to get good signal or speed due to increase an amplitude of signal's waves. Is it true?? Try to help me out.