Phone voice drop

I just joined the Xfinity group in January 2019.     My contract covers home phone, tv and cell.    When talking on the HOME phone line,   it varies regarding how long I am talking.    Then it drops me and the person I am talking to cannot hear me.    I CAN hear them.     I hang up and re-dial.    Then we restart our conversation ONLY to have the line drop ME again and again I can hear the person on the other side.        Also, I had been told there is cracking on my line.   I did PURCHASE a NEW phone.     I still have the problem.    And it is never with the same person.   Today, I called Comcast and it dropped me and I could hear the rep.    Don't know if there is a link to my computer......but sometimes it is STUCK.    I was told there could be an electrical jump to my Comcast line????   Anyone hear of that?   Comcast has been out 2 times now.   Problem NOT resolved.