The addition, or removal, of certain equipment in order for a circuit to achieve the performance characteristics required by analog or, more typically, certain types of data transmission. For example, an especially long copper local loop might require the addition of load coils or amplifiers to achieve the proper level of performance for voice grade analog applications, or regenerative repeaters for digital data applications.A copper local loop might require the removal of load coils to achieve the proper level of performance for an ADSL application. See also ADSL, amplifier, load coil, and repeater.