Load coils only benefit voice quality lines since they affect the frequencies between 300 Hz and 3000 Hz. While flattening the attenuation in the voice band, load coils drastically increase the attenuation at higher frequencies. Digital technologies like ISDN, HDSL, and ADSL all require higher frequencies to operate. Due to this fact, loading coils need to be removed to digitise the loop. It sends out user modifiable energy pulses over the line and detects reflections to locate loop faults.
Users can print test results.
Imagine having the ability to email test results to a colleague or equipment supplier.