However if your current modem connects at a speed below its rated maximum speed, then there is nothing to gain by buying a faster modem. Unless your modem is faulty, a slower than maximum connection speed indicates that you are having your connection speed limited by the condition or design of your telephone line. This is why if you buy your new modem and see no speed increase, you should take it back and get your money refunded. That is where the generous refund policy of the store you shop in is so important. Information inside your computer is in binary, a series of 0's and 1's.
Phone lines are analog, they transmit data as a series of peaks and valleys.
This is the wave pattern that many people have seen on electronic test equipment screens. A lot of the telephone network is increasingly digital. Our part of the phone connection between the phone company and us is digital. Digital lines still have noise, and are still subject to limitations, but they have less noise and a higher limit. Dozens of hardware manufacturers have chosen this protocol.