If you have a wall-mounted phone, you will need to purchase a wall-mount filter. You can purchase a wall-mount filter from your local computer retailer.
Remember: Installing filters on your phone devices is Step 1 of the Verizon Online DSL installation process. You need to install filters on all phone devices using a telephone line before installing your modem.You'll install your modem in Step 2 of the installation process.
Wall mount filter installation