Re: 4 upstream channel bonding - post here
 

The original trial firmware (9.1.116BA3) from October 2017 was just a ICMP "fix" which hid the problem, but the newest versions (.603/.608) appear to do much more.

All the tests and research on the VM forum since .603 first appeared in April shows a real improvement. Long discusion from this page onwards: https://community.virginmedia.com/t5.../true/page/364

US users on the DSLreports forum (where details of the Intel Puma 6 bug first surfaced) are seeing substantial improvements too.

Re: 4 upstream channel bonding - post here
 

Interesting, I'm on 9.1.116.608 with an uptime of over 8 days.. I was on the original trial so maybe I got this 'proper' firmware much sooner.

Re: 4 upstream channel bonding - post here
 

Lost service at midnight the other evening for two hours.

...Then, as if by magic - (only two?) 64QAM upstreams when back online.

I guess there's been some serious upgrading as everyone in the borough was down for the duration - I was previously on 2 16QAM's

Tom

Re: 4 upstream channel bonding - post here
 

And now we have four shiny 64QAM channels in Havant, to enjoy!

Looks like the base latency has dropped a little as well, which surprises me :)

Tom

- The spikes last night were due to heavy upload by myself!

Re: 4 upstream channel bonding - post here
 

Since yesterday i have now gone from 2xQAM64s to 4xQAM16s in CB24 area, this is the first time i have been on 4 upstreams.

Re: 4 upstream channel bonding - post here
 

Cool, 4 x qam 16 is better than 2 x qam

Re: 4 upstream channel bonding - post here
 

Still 2 x 64QAM in Uddingston

Re: 4 upstream channel bonding - post here
 

This also caused my IP address to change, is that normal?

Re: 4 upstream channel bonding - post here
 

If they moved you to a different CMTS then yes. i.e. they've upgraded your local hub site.

Re: 4 upstream channel bonding - post here
 

I just need to get them to fix my levels now as i have a huge slope of -8.6 to +6.5 since they did this, but before it went from -1.0 to +9, even after a cable repull, just waiting for a response on their forum, as i also can't watch 15 HD TV channels due to breaking up.

Next door neighbours TV channels are fine and his brown box is on the same wall and a few metres away so i am thinking it is the 25 thinner cable that is running around the outside wall that could be the issue?

Re: 4 upstream channel bonding - post here
 

Been having noise issues the past week (upstreams dropped from 64qm to 16) just had about an hours outage and it's come back with 4 upstreams, but still 16qam, does this still suggest a noise issue on the 4 channels?

https://www.cableforum.uk/images/local/2018/08/12.png

Cheers!

Re: 4 upstream channel bonding - post here
 

Ya, you'll see them go back up to qam64 over the next couple of days and transition to qam32 in the meantime as things improve.

Re: 4 upstream channel bonding - post here
 

Cheers General, VM are apparently monitoring the area but can't tell me if the 4th was added *because* of the noise issue or they already had plans to add a 4th channel and it just happened to coincide with this noise issue.

Does anyone know if networks are upgrading the CMTS to add another channel, would they notice the noise on it, or would they just ignore it because "that's not what they're there to do" sorta thing?

Re: 4 upstream channel bonding - post here
 

The 4th channel should be there to stay. Adding an additional channel to an upstream bonding group is a big change and i never heard of them doing it short term to mitigate a 33% drop in capacity due to noise. If they did (which i very much doubt) it will be out sheer desperation and your area must be at the absolute limit of capacity.

Re: 4 upstream channel bonding - post here
 

Thanks again General, this area has never had contention previously, although that's not to say we've not hit it, speed seems fine during peak times even with the noise issue, just had some drop outs and general "laggyness" which i guess is down to the noise.

Re: 4 upstream channel bonding - post here
 

Still on 2 (64 qam) channels here.

Re: 4 upstream channel bonding - post here
 

Forgot to mention above, Gateshead area, NE8

Re: 4 upstream channel bonding - post here
 

More work being done still on 2 up

https://www.cableforum.uk/images/local/2018/08/16.png

Re: 4 upstream channel bonding - post here
 

SM4 area - Fed from New Malden

Earlier this month I got an email from Virgin Media Business to advise of planned work due to take place today that would cause a short outage. That did happen at about 10:30 this morning, and have now gone from 3 x QAM64 upstream channels to 4 x QAM64 upstream channels.

So currently on a 32 channel downstream group and 4 x QAM64 upstream. Like the residential devices - the business Hitron can only use 24 of those 32 downstream channels.

Re: 4 upstream channel bonding - post here
 

4x 64QAM in Slough, Berkshire

Looking good!

Re: 4 upstream channel bonding - post here
 

Hounslow TW3 4 upstreams change happened today.

1 46200000 41.5 5120 64 qam 9
2 32600000 41.3 5120 64 qam 11
3 39400000 41.5 5120 64 qam 10
4 25800000 40.5 5120 64 qam 12

Re: 4 upstream channel bonding - post here
 

Uddingston Now on 4 channel upstream bonding

1 39400000 41 5120 64 qam 2
2 25800000 41 5120 16 qam 4
3 32600000 41 5120 64 qam 3
4 46200000 41 5120 64 qam 1

Re: 4 upstream channel bonding - post here
 

Part's of Uddingston been on 4 for a few months.

Re: 4 upstream channel bonding - post here
 

What part are you in. We are in ML3

Re: 4 upstream channel bonding - post here
 

ML6

Re: 4 upstream channel bonding - post here
 

Only 2 in ML5.

Re: 4 upstream channel bonding - post here
 

Wondered why I had a ton of pre and post errors on my downstream channels and checked my upstream and I'm now on 4 channels.

Nottingham, Basford UBR.

https://www.cableforum.uk/images/local/2018/09/2.png

I had noticed my modem rebooting and such late at night so I guess they were doing some work.

Re: 4 upstream channel bonding - post here
 

More of Uddingston on 4 channels.

Re: 4 upstream channel bonding - post here
 

Staverton now on 4 upstreams (64QAM)

Re: 4 upstream channel bonding - post here
 

One of the things I've noticed on my 4 channels (for the past couple of years) there is always 1 channel at 16QAM (the others being 64QAM). Usually it's 25.8MHz that's at 16QAM. But today, that channel is at 64QAM and another channel is at 16QAm. In due course it'll revert. The VM forum bods can't give me an explanation for this.

Re: 4 upstream channel bonding - post here
 

Seph i used to have this issue but now touch wood all seem rock solid on QAM64.

Could it be noise?

Re: 4 upstream channel bonding - post here
 

Not in my opinion, Alan. It moves; yesterday it was 32.6 MHz at 16QAM, today it's back to 25.8 MHz - the others being 64QAM. Two years of noise would have got fixed by VM, imo.

Re: 4 upstream channel bonding - post here
 

Mine are all 64QAM now.

https://www.cableforum.uk/images/local/2018/10/1.png

Re: 4 upstream channel bonding - post here
 

Seph if they can leave people over subscribed for that amount of time then surely they can leave some noise on the network lol.

Re: 4 upstream channel bonding - post here
 

The modulation on my device seems to be all over the place since it moved to 4 channels.

Currently it's

1 46200000 42.5 5120 32 qam 9
2 32600000 43 5120 64 qam 11
3 39400000 42.8 5120 64 qam 10
4 25800000 41.8 5120 32 qam 12

Yesterday it was a combination of 16, 32 & 64.

Re: 4 upstream channel bonding - post here
 

Re: 4 upstream channel bonding - post here
 

Mine went from 3x 64qam to 4x 16qam, according to Virgin this is normal...

Re: 4 upstream channel bonding - post here
 

Mine went from 2x64 which i had only had a few weeks to 4x16 and i even had a repull for a separate power level issue and even that didn't bump them up to 4x64.

But the repull still fixed my power levels on the V6 and i still get max download speed 24/7.

Re: 4 upstream channel bonding - post here
 

i dont think he meant you in particular, but in general if it "works" there is no fault" vm attitude

Re: 4 upstream channel bonding - post here
 

Internet just went off for 20mins and i now have 4x 64qam upstreams in CB24 area, this is significant as i have never had this before and have mostly been on 16qam, hopefully they upgraded something and the change will stick.

Re: 4 upstream channel bonding - post here
 

For bonded channels here.

Re: 4 upstream channel bonding - post here
 

Still 4x 16 here, really struggling with the new 35 upload, suspect the 2 are related!

Re: 4 upstream channel bonding - post here
 

What's happening to my spelling? I got the 35Mb upgrade before I noticed the four bonded upstream channels.

Now on V.VIP and doing very nicely here in Coventry.

https://www.cableforum.uk/images/local/2019/05/6.png

Re: 4 upstream channel bonding - post here
 

So the internet just went off for 30mins, this was preplanned as they sent me a letter.

The changes i can see are Downstream power level has gone from a high of 6.4 to 3.9 and the upstream from 38 to 40.

Upstream frequencies have changed, any idea what improvement this will give?

Old
1 25799803 3.75 5120 64 qam 4
2 46200018 3.825 5120 64 qam 1
3 39400045 3.825 5120 64 qam 2
4 32600085 3.8 5120 64 qam 3

New
1 25800000 3.975 5120 64 qam 4
2 39400000 4.025 5120 64 qam 2
3 46200000 4.025 5120 64 qam 1
4 32600000 4 5120 64 qam 3

Re: 4 upstream channel bonding - post here
 

Everything is the same - just the channel order is different.

Except that the last two digits are different. Whether or not the old signal being so slightly off centre would give you a bad experience - I can't be sure. Instinct tells me that any degree of centre can give trouble.

Re: 4 upstream channel bonding - post here
 

Out of curiosity i just checked mine and while i'm still on 4 upstreams, they're all 64QAM rather than the 16 they used to be.

Maybe a coincidence but i'm also able to consistently see 35meg up now as well :)

EDIT: Also looking at downstream channel IDs my area now has at least 30 available so some kind of work as occurred recently

Re: 4 upstream channel bonding - post here
 

By moving from 16QAM to 64QAM, the packing density on the upstream has increased by 50%. That means they've cured the noise problems.

Re: 4 upstream channel bonding - post here
 

Now the frequencies have changed again, is it normal for them to move about?

1 25800050 3.975 5120 64 qam 4
2 39399885 4.025 5120 64 qam 2
3 46199975 4.025 5120 64 qam 1
4 32600000 4.025 5120 64 qam 3

Re: 4 upstream channel bonding - post here
 

Not normal at all.

The frequencies are going off centre, but it seems that your Hub 3 is able to tune in OK. If there are no timeouts and upstream speed is fine, then you'll be leaving it to the network team to resolve once their monitoring tools alert them.

Re: 4 upstream channel bonding - post here
 

Hitting 'refresh data' isn't changing them and the readings from yesterday were taken straight after their maintenance work.

Whats the best speed test site that gives all the info like buffer bloat etc as i find the below has issues measuring the upstream and goes far fast than it should then it trips out?

http://www.dslreports.com/speedtest

Re: 4 upstream channel bonding - post here
 

Makes sense, taken them long enough i've been on 16qam upstreams since I moved here 2.5 years ago

Re: 4 upstream channel bonding - post here
 

Reigate (RH2) has been upgraded to four channels at 64QAM - was only 2 for quite a while

https://imgur.com/UfOXpcN

Re: 4 upstream channel bonding - post here
 

After a 4 hour outage yesterday, some work has been done and my area (Gateshead) now appears to have at least 12 channels available and none are 25MHz.

https://www.cableforum.uk/images/local/2019/07/6.png

I also now hit 36Meg up at all times of the day (woohoo)

Nothing else appears to have changed downstream wise.

Re: 4 upstream channel bonding - post here
 

Ignition said somewhere that they'd be doing away with 25MHz upstream.

Re: 4 upstream channel bonding - post here
 

Yep I remember reading that, well it's happened :)

Re: 4 upstream channel bonding - post here
 

Still on 16QAM here in Preston, Lancashire.

Re: 4 upstream channel bonding - post here
 

Baguley / M32

I'm supposedly on M500 and it's worse than M350 I had last week before they swapped it over :-(

Re: 4 upstream channel bonding - post here
 

why have you posted your upstream power levels? You are getting full speed on the upstream.

Re: 4 upstream channel bonding - post here
 

Because :

1. Synthetic posted his
2. I'm an idiot?

Re: 4 upstream channel bonding - post here
 

I've now dropped to 4x 32qam not sure what this means but i know 4x64 is better.

Re: 4 upstream channel bonding - post here
 

It means that there is sufficient noise on the network that it cannot sustain qam64 and has had to drop to qam32. Without looking up the exacts stats you are probably looking at something like a 12.5% drop in throughput so if for example the 4 bonded channels had a maximum throughput of 200mbits, that has now been reduced to 175mbits. Not the end if the world.

Re: 4 upstream channel bonding - post here
 

Re: 4 upstream channel bonding - post here
 

This is what i have now, i am not that concerned as i can still get my full 220/20 what i am paying for.

1 25799996 3.95 5120 32 qam 4
2 46200068 4.025 5120 32 qam 1
3 39400025 4.025 5120 32 qam 2
4 32599939 4.025 5120 32 qam 3

Re: 4 upstream channel bonding - post here
 

Re: 4 upstream channel bonding - post here
 

So anyone that doesnt have 00000 at the end of their frequencies have a fault? As there are alot of people in this thread like that so it must be common?

Re: 4 upstream channel bonding - post here
 

No - the centre frequency does not always end in 00.
Yours are all over the place. The endings should be consistent.

Re: 4 upstream channel bonding - post here
 

More importantly that QAM32 is an issue. The system is working in that it's falling back for reliability, but make no mistake - there is an issue there somewhere and it's likely only going to get better if someone reports it. Otherwise, it'll probably only get worse.

Re: 4 upstream channel bonding - post here
 

The 32QAM is not a problem, Kush. There is still falback to 16QAM, which is where the peril lies if noise is bad. The off-centre frequency is outside the standard and must be rectified.

Re: 4 upstream channel bonding - post here
 

I agree Seph, but I don't think the two are unrelated. It should be QAM64, it's QAM32 for a reason and I don't think it's a coincidence that the frequency is off.

Re: 4 upstream channel bonding - post here
 

That is a know bug in the firmware it’s also the same bug that makes the power levels report 4.025 instead of 40.00 I have the same on mine. & the reason for 32QAM is noise on the network

1 46200000 4.025 5120 64 qam 3
2 32599976 3.875 5120 64 qam 5
3 39400019 3.875 5120 64 qam 4
4 53699971 4.175 5120 64 qam 2

Re: 4 upstream channel bonding - post here
 

Now showing 4x 64QAM again, lets see how long it lasts, not that i am bothered or worried about it at this time as long as my connection is running at the speed i pay for which is usually is.

Re: 4 upstream channel bonding - post here
 

As of today I have gone from 4x 16QAM upstream channels to 4x 64QAM upstream channels in Preston.

;)

Re: 4 upstream channel bonding - post here
 

Finally got around to posting on the VM website about what you said today as the frequencies change daily, i wonder if they will be able to see this issue from their end?

Re: 4 upstream channel bonding - post here
 

We've had 4 upstreams for a long time now but they were always 16qam, the internet went down for 10m this morning and we now have 4 x 64qam.

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 39400014 3.418 5120 64 qam 10
2 25800053 3.425 5120 64 qam 12
3 32600019 3.425 5120 64 qam 11
4 46200039 3.425 5120 64 qam 9

Re: 4 upstream channel bonding - post here
 

Are these any better as i had a letter through the post saying work was planned and last Friday it was completed and now they are like this?

Still don't have an issue with speeds, and the VM forum did nothing.

1 39400000 3.87 5120 64 qam 2
2 25800120 3.85 5120 64 qam 4
3 46200000 3.9 5120 64 qam 1
4 32600000 3.85 5120 64 qam 3

Re: 4 upstream channel bonding - post here
 

4 here, LEEDS N.E.