Hi I been having the same issue, this started back when they rewired all the apartments... that was 2 years I think... anyhow, I'm going to try and replace the splitter. For the reason why, I will explain what happened, maybe it happened to you as well. So after they rewired the apartment they said I was all set ( the installers not cox) of course that wasn't the case, I still didn't have internet service. The technician came from cox and said he must on there side. So I went back to the installers they said, we told them, they had to install a splitter, which the installers end up doing not the tech. This is been going for like 2 years i had it....Does anyone know what brand splitter Cox's uses?