Filter installation: Connected phone devices
Check if you need to install or replace a phone line DSL filter with the Verizon Troubleshooter.
If you have one phone device connected into another phone device, such as a phone plugged into an answering machine, you can install the connected devices and filter into one phone jack.
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.You'll install your modem in Step 2 of the installation process.
DSL filter installation on connected phone devices