PhoneTray works with any phone service:
Regular phone line from Bell, AT&T, Verizon or CenturyLink
Digital phone line like AT&T U-verse or Verizon FiOS
Cable phone service like Comcast XFINITY or Time Warner Cable
Internet VoIP phone service like Vonage, MagickJack or Ooma
Wireless home phone from AT&T, Verizon or Straight Talk
How PhoneTray works:
PhoneTray software runs on your computer and monitors your phone line using a special device (USB voice modem). When a call comes in, PhoneTray checks our online database and your personal black list. If it's an unwanted call, PhoneTray blocks the call and plays a message to the caller. All legitimate calls are passed through to your phone.
You can select "number disconnected" message and the caller will think that your number has been disconnected and will stop bothering you. It works with robocalls and human callers as well!