Re: 4 upstream channel bonding - post here
 

I'm on 4 x QAM64 upstream channels in Brighton area 20

Re: 4 upstream channel bonding - post here
 

Still 2 x 16qam in Muxton. Can't say I've ever noticed any upstream issues though, so probably no need for more.

Re: 4 upstream channel bonding - post here
 

I am not on 4 yet but have just gone to 2 qam64s for the first time ever so maybe they're upto something here too.

Re: 4 upstream channel bonding - post here
 

I did a reboot of the Hub on Tuesday evening and then it came back with 4 upstream channels. Might be worth a try if you haven't already.

Re: 4 upstream channel bonding - post here
 

SM4 area (fed from New Malden) Changed from 2 x 64QAM upstream channels to 3 x 64QAM upstream channels today. Was notified of config work as this is a business service, the work was listed as New Malden D3 config 8.

Surprised it didn't go right to 4 as in other areas.

Re: 4 upstream channel bonding - post here
 

I went from 2 QAM64 to 3 QAM64 to now at 4 QAM64 so you might get yours soon.

Re: 4 upstream channel bonding - post here
 

Here in Leeds went from 2 QAM16 to 4 QAM16.

Re: 4 upstream channel bonding - post here
 

Been getting terrible download speeds the last day or so, so just checked the modem and I've got four upstream channels too. I'd rather have the faster downloads back! Getting a lot of T3 timeouts whatever that is.

East London.

Re: 4 upstream channel bonding - post here
 

Still 3 here but not had any issues up or down, which I guess is why we're still on 3!

Re: 4 upstream channel bonding - post here
 

Yes that sid the job: 4x 16qam now. I last rebooted on Monday/Tuesday so must have happened one day this week.

Re: 4 upstream channel bonding - post here
 

Four channels appeared in the last few days, Coventry CV3. Looking at my TBB quality graph it seems teh conversion was done in the small hours of 7th. June.

No improvement in TBB graph quality.

Re: 4 upstream channel bonding - post here
 

Your upstream levels look on the low side.

Re: 4 upstream channel bonding - post here
 

No obvious effect on performance. I guess levels should be nearer 40.

Here's my downstream Channels 1 - 10 are lower - around 3 or 4 dBmv

Re: 4 upstream channel bonding - post here
 

I think 30 is the magical number but still, I have never seen them that low but as long as everything is working okay there isn't anything to worry about. You might find he lives right next to the cabinet so his modem doesn't need a lot of power to get the signal back to the network.

Re: 4 upstream channel bonding - post here
 

There isn't really a magic upstream number. The way that DOCSIS works is that the upstream power level is never higher than is necessary for the CMTS and the Hub to communicate with each other as determined by the keep-alive traffic.


In Roughie's case, he is close to the cabinet and downstream power levels are therefore high (and upstream low). Although the lower frequency channels are knocking on 10 dBmv, the hot weather will decrease that as the metal expands. That said, it would do no harm to put an attenuator to the back of the hub - say 6 dB.