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RG41 5: 4 upstream channels
Upstream bonded channels
Channel ID Frequency(Hz) Modulation Power (dBmV) Mode Channel Bandwidth(Hz) Symbol Rate (ksps) 5 46200000 ATDMA 43.3 16 qam 6400000 5120 8 25800000 ATDMA 43.3 16 qam 6400000 5120 7 32600000 ATDMA 43.2 16 qam 6400000 5120 6 39400000 ATDMA 43 16 qam 6400000 5120 Happened yesterday much to my surprise. Cisco CMTS with 16DS channels. |
Re: RG41 5: 4 upstream channels
congrats seph it begins :) david
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Now i want it
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I wouldn't mind the 300 meg but they force you to take a stupid phone line. Have you noticed how all the contracts with phone lines are 18 months so that you get milked for something quite useless?
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Good stuff, although I was expecting to see posts on this last month ;)
There was a firmware issue making this harder on the Arris kit but hopefully that's sorted too and that platform can receive the same treatment. ---------- Post added at 10:09 ---------- Previous post was at 10:08 ---------- Quote:
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Just checked mine and I seem to have 1 channel 32 qam and 1 64 qam... they both used to be 64.
Seems a bit weird they're mismatched? http://i.imgur.com/Czn6mDQ.png |
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Might be wrong and we all know I'll be corrected if I am... but I believe that QAM on Upstream steps down to 32/16 when something isn't right... like powel levels possibly?
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Hmm, as far as I can see they're in spec, DS are 2/3+
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Yeah, I'm not sure on the reason that it does step down, just used power levels as an example. It might be something to do with noise as higher modulation presents more noise, but how you can visualise that from the router GUI I couldn't say.
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As the modulation drops to lower levels the amount of effective power increases and helps the SNR. |
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LOL New Malden is usually last :-)
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I wonder when Swansea will get it?
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---------- Post added at 22:13 ---------- Previous post was at 22:11 ---------- Quote:
It's not really so great when someone who's apparently 64 is competing with someone who's apparently 18 in terms of obsession with network capacity and impatience. |
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You make it sound like its a bad thing
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When I'm talking about bandwidth in that regard I'm talking about RF bandwidth, not Mbps. ---------- Post added at 22:18 ---------- Previous post was at 22:16 ---------- Quote:
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Yeah it is sad but I've always wanted the best that's always been my thing.
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Regardless you have the best VM offer for right now. Impatience won't get anything deployed faster. |
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My area is still on old Motorola BSR 64k's I believe, so I'm sure we wont be seeing anything beyond the 12 DS and 2 QAM16 US that we have right now, until the new CMTS' are rolled out here. Ex NTL area in East Kent.
I'm assuming 2 x QAM16 is not enough for any faster than the current upstream offering, so upgrades will have to be done before we see 10:1 again, if VM does decide to go ahead with the rumoured boosts. |
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I don't think they would release on anything other than the Arris or new Cisco kit, however hopefully that's all that would be needed.
Gets somewhat more time consuming if they have to start overbuilding the stuff in cabinets as they will in some areas. On the positive side when that's done those areas have tons of capacity and will be more ready for DOCSIS 3.1 with big upstreams. |
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I don't think being enthusiastic about network upgrades is sad. We could do with more of it, I'm a firm believer that top notch infrastructure would benefit the country as a whole and pay for itself in no time at all.
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Well now one of my upstream channels Is down to 16,and maxing out about 2meg up, hopefully it's just some work being done, although there's nothing on the service checker...
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IF nothing is on the service centre, treat it as a fault. Don't tell support about the QAM, just tell them you've got slow upload speeds.
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Does depend on location though. |
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Remember, Kush, that this is a non-contended line. If it was shared by 200 aggregated users, that would notionally be covered by £2.50/month from each user (plus the costs of any aggregating equipment).
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The original upstream uplift was a much larger increase proportionately and involved a new technology. This is pretty disinteresting relatively. |
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Some of us dont have endless money.
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We're in a business centre with many other businesses and it baffles me that the owners don't just fork out for a beefy leased line to rent to the individual businesses like that. Instead, there's literally tens of fibre points coming into the building, to the point where they had to drill a hole in one of the boxes in the basement to be able to roll out additional fibre to our office :( Quote:
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Besides the point that 3.1 is probably going to take a bloody long time to roll out in the next 2-3 years if at all.
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EDIT: Just FYI upstream enhancements will take a little while too, especially in areas that need rebuilds. ---------- Post added at 10:03 ---------- Previous post was at 10:01 ---------- Quote:
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Your such a bloody tease I'm just going to say that now STOP WITH THE DAMN WINKY FACES I NEED TO KNOW WHAT YOU ARE HIDING.
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all hail Cisco :nworthy::nworthy::nworthy::nworthy:
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How is this trial running for you Sir Sephiroth?
I noted discussion on DOCSIS 3.1 in this thread. Just FYI Comhem in Sweden have released 1Gb down, 100Mb up via EuroDoCSIS 3.0. As I've said a few times still a fair bit of mileage in 3.0 :) ---------- Post added at 17:35 ---------- Previous post was at 17:21 ---------- https://www.cableforum.co.uk/images/local/2016/09/2.png |
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given that they are trying to get everyone on to shub3's for 200mbits+ it looks like they are trying to keep %channel utilisation down so I imagine they won't want to go above 400mbits without releasing a 32 channel modem and buy that time we would surely be ready for 3.1. Is there any info on which gateway that speed test was done on?
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Sure. It was one of these and used 24 downstream and 6 upstream channels.
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Upstream bonded channels Channel ID Frequency(Hz) Mode Power (dBmV) Modulation Channel Bandwidth(Hz) Symbol Rate (ksps) 6 39400000 ATDMA 44.5 16 qam 6400000 5120 8 25800000 ATDMA 44.5 16 qam 6400000 5120 7 32600000 ATDMA 44.5 16 qam 6400000 5120 5 46200000 ATDMA 44.5 64 qam 6400000 5120 |
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cool, Netgear again which means it has the potential to come in our direction
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It's just a 24x8 DoCSIS 3 gateway, same as the SH 3.
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I've had 1x QAM64 and 1xQAM16 for weeks now:
https://www.cableforum.co.uk/images/local/2016/09/1.png Is that a valid/normal configuration or does it indicate a problem somewhere? I mean speeds are fine, so I've not been bothered, it's just unusual to see two channels on different QAM's without there being an issue. |
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It's a legitimate configuration, but could also indicate problems.
Could be ingress in the 50.5MHz -> 56.9MHz range, there's an amateur radio channel there, or could be using some 16QAM and some 64QAM channels intentionally to reduce load on the upstream optics. ---------- Post added at 14:10 ---------- Previous post was at 14:07 ---------- Quote:
EDIT: Not entirely related but I saw a guy mentioning 20 downstream channels on the Cisco 10k. Yes, possible, but improbable. To go past 10 channels requires installation of a 3 Gb SPA, and as far as I know these have only been used to go to 12 channels to permit release of Homeworks+. VM aren't doing a big investment in these, purchasing the bare minimum in fact, as they are getting shot of the 10ks as part of migration to CCAP. These are being used as an interim solution while issues like power, space and cooling are sorted to make room for the CCAP kit and higher density, dedicated M-CMTS. People on 20 channels are on E6k or cBR-8 unless there were a very strange set of circumstances that required a very non-standard configuration. |
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However since the fix (only took 2 days!) both went back to 64 and have stayed like that since. |
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In keeping with my topic, I now report for everyone's delectation that 3 of my upstreams are now 64QAM and one is 16QAM.
You'll see the slight upstream noise from the BQM. Just to remind, this is a Hub 3 in modem mode to an ASUS RT-AC68U. https://www.cableforum.co.uk/images/...10/1.png?w=540 |
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Anyway to find out what model of CMTS your on? I think I'm still on a Motorola BSR 64k unless that's changed since last year. Still on 2x 16QAM here.
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