It is a TP Link TC-W7960 modem. I bought it reconditioned at Amazon about three years ago so I could quit paying rental fees to Cox. 8x4 refers to the number of downstream and upstream channels. It may be possible that I am overloading my bandwidth with too many devices, and the network can’t quite handle it all at once. Or so a tech at Cox told me a couple of years ago, (probably trying to sell me a higher tier of service).