Add filters to your other phones
Installing a filter between a phone and its wall jack prevents noise interference when the same line is being used for your Internet connection. They may also prevent speed and service interruptions.
All phones, fax machines and satellite receivers connected to the phone line must use a filter.
Do not use a filter between the modem and the phone jack.
For each other phone in your home:
- Unplug the phone’s cable from the wall.
- Plug the phone’s cable into a filter.
- Plug the filter back into the wall jack.