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load coilA load coil is an inductor placed on the local loop by the phone company, they are placed starting at 3000 feet in 6000 feet intervals to suppress exactly the signal that DSL modems need to transmit high speed data on -- high frequency. The effect of a load coil is similar, from the perspective of the DSL equipment, to adding 20k feet to the line length. No DSL equipment now works through load coils. A Load coil is the major source of DSL Disappointment during the installation phase of DSL.
Here is a good site on load coils, and this one as well www.gyrene.com/loadcoils.htm
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