[Sephiroth]

Originally Posted by GW1988

Just to update the thread, another VM technician came out today. He checked and could only see one upstream on his phone. Took my Hub3 to the cabinet across the road and confirmed that at the cab there was only one upstream too. He said "Networks" would come out tomorrow and fix.

Do you think this is why the HUB5 was acting up, especially as it wasn't reporting the upload channels at all?

Yes - the technician did an even better thing than asking the neighbours! The entire locality was/is suffering the same upstream impairment.

The upstream is modulated at 64QAM because the frequency range is prone to noise ingress. So, for the last 8 or so years, everyone had 4 bonded channels to give everyone a chance to get something out of the upstream.

Now VM is introducing a later version of the transmission protocol. The 4 upstream channels use the DOCSIS 3.0 protocol and they're expanding that to 5 channels. The later version is DOCSIS 3.1 which, although operating in the same frequency range, is 'clever' enough to be more noise tolerant than DOCSIS 3.0. DOCSIS 3.1 is the precursor to higher upstream speeds, like 100 or 200 meg.

HTH.