Problems with home phone cutting in and out on a Cox line

I THINK I FIGURED IT OUT!!!! The problems occur around a certain time of day, roughly 10 am-3 pm. When it started today, I ran a speed test while I was talking on the phone and PING was 29, download was 85.91 Mbps and upload .08 Mbps. When the issue stopped it was 17 PING, download 170 Mbps and upload 10.05 Mbps. (the download should be a lot higher) Last night all was good. Therefore, it has to be on Cox's side. I shall call them (AGAIN) and discuss with them my issue.