What are load coils?
Load coils are used to extend the range of a local loop for voice grade communications. They are inductors added in series with the phone line which improve voice service. Unfortunately, they do not allow any signals above the voice range to pass through them. Since all types of xDSL (as well as ISDN) use frequencies well above the voice range, the load coils prohibit their use. This has been the case with xDSL deployments, however Verizon will remove any load coils if possible, though it will mean delays.
