display | more...
Load Coils are devices out on telephone poles that filter out line noise. Around here they are placed every 18,000 feet.

On the PSTN voice communications occur in the frequency range of 0-4 khz. What a load coil does is filter out anything that may interfere with the voice transmissions. It is for this reason that around here the max range for DSL is 18,000 feet. DSL operates at frequencies above the voice frequencies (1 - 25 mhz). If a DSL hit one of these load coils, it would be filtered out and your DSL would cease to function.

Log in or register to write something here or to contact authors.