Re: 4 upstream channel bonding - post here
 

4 is better than 2. QAM64 better than QAM16.

It allows the system to better balance / share the available capacity.

Re: 4 upstream channel bonding - post here
 

Is there any chance of getting QAM64 or do this not get upgraded readily by VM?

And what does that do, provide faster speeds or does it help with latency?

Re: 4 upstream channel bonding - post here
 

Has anyone noticed an actual improvement in service when going from 3-4 upstreams?

Still on 3 but never had an issue with congestion, suspect that's why we're still on 3 :D

https://www.cableforum.uk/images/local/2018/05/11.png

Re: 4 upstream channel bonding - post here
 

The level of modulation used is a result of the hub negotiating the connection to the cabinet. If the signal to noise ratio is good enough the connection will automatically go to QAM64.

Higher modulation means more throughput and you're more likely to get your provisioned speed.

Don't think it improves latency though.

Re: 4 upstream channel bonding - post here
 

I wont bore you with the technical details but qam64 is 50% faster than qam16. The idea is that more channels increases the amount of available bandwidth and couple that with increased modulation increases it further. So.........going from 2 upstreams at qam16 (which is what everyone used to be on) to 4 upstreams on qam64 triples (x3) the amount of available bandwidth to you. It sounds great but isn't going to do anything for you unless you had issues to start off with (which I never have) plus it gives them plenty of leg room for future upgrades.

nope

nope

Re: 4 upstream channel bonding - post here
 

Some areas still are on that. I know this area was, unless it's changed in the last few weeks. I could connect the Hub up to see, still got a week or so before the cancellation goes through.

Re: 4 upstream channel bonding - post here
 

Yes still on 2 upstreams in cb24, I am along way from the cabinet so I guess that is why I never see qam64.

Re: 4 upstream channel bonding - post here
 

I visited my parents in Newport today and they are on 4 x 16qam. I'm a few miles down the road still on 2 x 16qam.

Re: 4 upstream channel bonding - post here
 

The only thing I've noticed is that my graph went from this:

https://www.cableforum.uk/images/local/2018/05/12.png


To this:

https://www.cableforum.uk/images/local/2018/05/13.png

Re: 4 upstream channel bonding - post here
 

Interesting, wonder if the local node has been done. Hopefully it has as would of helped with the upstream congestion, if not solved it. Still not enough for me to cancel the cancellation though.

Re: 4 upstream channel bonding - post here
 

I now have 4 bonded upstreams since rebooting my hub yesterday (St Helens area).

1 32600000 36.3 5120 16 qam 3
2 53700000 37.8 5120 64 qam 5
3 25800000 36.3 5120 16 qam 4
4 39400000 37.8 5120 16 qam 2

Only 537 is 64QAM but I've been told that's normal for my area?

Re: 4 upstream channel bonding - post here
 

More Upstream channels better latency as not as congested as before.

Re: 4 upstream channel bonding - post here
 

I thought so still a welcome surprise just getting 4 up channels randomly.

Re: 4 upstream channel bonding - post here
 

Let's hope the next step is a capable CPE with has a modem mode from day 1 and no chipset issues :)

Re: 4 upstream channel bonding - post here
 

4x QAM64 upstream channels on my Dad’s connection now. On Telf14.