For the past week I've had serious internet issues where people couldn't use my services because of packet loss and upload speeds plummeting to kbit/s resolution (0.09 mbit/s).
I noted that one of my Upstream frequency was at 39600000 hz even after leaving my modem unplugged for a long time and the channel was reporting 1.280 Msym/sec.
Finally a service man comes out and runs diagnostics and says everything looks fine, I go and check my modem is the Upstream channel has now changed to 16400000 hz and 5.120 Msym/sec and everything is working perfectly fine again.
So my question is how are the frequencies assigned? Does the central hub say "Talk to me on X Mhz" and the modem abides by that?
I honestly haven't a clue and my only deduction was that there was too much noise on that frequency and when he ran diagnostics it told central poor communication on X Mhz and switched?