Where do the filters go?
There are two ways to filter your phone line: A) Have Sierra Telephone install a whole house splitter (also called a whole house filter), to isolate the one jack being used for DSL from the rest of your internal phone wiring. B) Install individual filters on each and every phone jack other than the one currently in use by the DSL modem. This includes answering machines, telephones, fax machines, Satellite TV units, Credit Card machines, medical monitors, 56k modems, propane monitors, external ringers, and CallerID boxes. These filters work in only one direction, so plug the filter into the wall jack, not into the device.