no ranging response received t3 time out

Just wondering if anyone can look at the Signal and Logs (below) and give me feedback as to whether its a modem or connection problem? If it's a connection problem I will probably return the SB6183. The more I read the more I am thinking it's a problem with the Comcast wiring outside the house. I have tried a new co-axial cable from the wall (only outlet being used) to the modem but am getting the same behavior. I also ordered a new SB6183 just in case its a modem problem. At the same time I scheduled a technician to come out and diagnose the problem (tomorrow morning). Yesterday I called Comcast (when I was getting consistently terrible speeds) and they sent a reset command which temporarily made it better. I also work from home so its slowly driving me crazy. I unplug the modem and router and it temporarily helps. Sometimes I am unable to stream anything and/or have major buffering issues while streaming. My August Home lock tells me its been disconnected all the time. Otherwise the connection constantly drops and cripples all my devices. If I unplug the modem it usually gets better for a little bit. Recently I have been having a hell of a time with my Comcast connection. I have been using a (purchased) SurfBoard SB6141 for years with little to no issues.

No ranging response received t3 time out