Acable might experience crosstalk, where the electrical signal bleeds from one wire pair to another, creating

A cable might experience crosstalk, where the electrical signal bleeds from one wire pair to another, creating interference. 
Interference is the process in which two or more waves such as light, sound or electromagnetic waves of the same frequency combine to reinforce or cancel each other, the amplitude of the resulting wave being equal to the sum of the amplitudes of the combining waves.