Identify devices that require a filter
Check if you need to install or replace a phone line DSL filter with the Verizon Troubleshooter.
Filters block the DSL signal from reaching your telephone, fax, or answering machine. Except for your DSL modem or wireless router, every telephone machine sharing the phone line that has Verizon Business Internet requires a filter. If filters are missing, you may experience reduced speeds as well as static or hissing on the telephone line.
Note: Using more than five filters can reduce the quality of your Verizon Business Internet service.
Where do I install filters?
Other common devices that need filters:
If you need additional filters: