Filter installation: DSL modem and phone share the same jack
Check if you need to install or replace a phone line DSL filter with the Verizon Troubleshooter.
If you need to connect your modem and a phone device into one jack, you'll need a High Speed Internet filter and a 2-for-1 jack (included in your installation kit) to complete your setup.
Remember: Installing filters on your phone devices is Step 1 of the Verizon High Speed Internet installation process. You need to install filters on all phone devices using a telephone line before installing your modem.
High Speed Internet filter setup of a phone and modem sharing the same phone jack