4 upstream channel bonding - post here
27-08-2017, 22:49
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#1
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Inactive
Join Date: Jun 2008
Location: Leeds, West Yorkshire
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4 upstream channel bonding - post here
As the title says, post here if you have 4 upstream channels bonded on your modem, alongside where in the country you are and upstream stats if you can.
It's a project in progress on the VM network so it'd be interesting to see just where they are.
It's a precursor to higher upstream speeds having the 4 channel bonding done.
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28-08-2017, 10:20
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#2
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cf.member
Join Date: Mar 2007
Services: Ultimate Oomph
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Re: 4 upstream channel bonding - post here
4 x 16QAM, Area20 Wirral
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28-08-2017, 17:22
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#3
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Dr Pepper Addict
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Re: 4 upstream channel bonding - post here
Still only two here (Nottingham).
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28-08-2017, 19:48
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#4
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Inactive
Join Date: Sep 2010
Services: VIVID 350, Sky Q
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Re: 4 upstream channel bonding - post here
Only two here as well. Surrey. I'm on VIVID 350 as well so they are not giving higher speed customers priority.
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28-08-2017, 20:48
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#5
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cf.addict
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Re: 4 upstream channel bonding - post here
Quote:
Originally Posted by Cromulent
Only two here as well. Surrey. I'm on VIVID 350 as well so they are not giving higher speed customers priority.
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The tier the customers on won't have any bearing on how many upstreams are in use. It's all about the equipment out in the field. Some areas have 65mhz upstreams some have 42mhz. The 42mhz areas on only physically fit 3 upstreams, so the modems will run on 2 of the 3. The 42mhz areas will be upgraded in due course though. And the areas running older kit, as the future plan will be to go above 65mhz
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29-08-2017, 04:20
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#6
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Re: 4 upstream channel bonding - post here
Still 2 here.
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29-08-2017, 09:31
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#7
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Inactive
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Re: 4 upstream channel bonding - post here
I was rather hoping people with 4 channel bonding would post, not people who are still not on it, and the first post makes clear what I had in mind.
This was a thread modeled after the ones here.
http://www.dslreports.com/forum/comcast
Looks like it's a bit late for that. Oh well.
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29-08-2017, 10:14
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#8
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cf.mega poster
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Re: 4 upstream channel bonding - post here
Can someone explain the benefits of moving to 4 upstream channels (from 2)? Many thanks!
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29-08-2017, 10:24
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#9
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Sad Doig Fan!
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Re: 4 upstream channel bonding - post here
Quote:
Originally Posted by ianch99
Can someone explain the benefits of moving to 4 upstream channels (from 2)? Many thanks!
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Read the first post.
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29-08-2017, 12:20
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#10
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Re: 4 upstream channel bonding - post here
Manchester ( Baguley) area 20.
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29-08-2017, 13:32
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#11
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Re: 4 upstream channel bonding - post here
Quote:
Originally Posted by Ignitionnet
I was rather hoping people with 4 channel bonding would post, not people who are still not on it, and the first post makes clear what I had in mind.
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Your stated aim was to see how far the project had progressed.
Quote:
It's a project in progress on the VM network so it'd be interesting to see just where they are.
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Therefore knowing it has not reached an area seems as useful as knowing it has, otherwise you have no idea one way or the other for that given area.
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29-08-2017, 15:24
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#12
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Inactive
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Re: 4 upstream channel bonding - post here
4 bonded upstreams wolverhampton
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29-08-2017, 16:32
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#13
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cf.mega poster
Join Date: Feb 2012
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Re: 4 upstream channel bonding - post here
Quote:
Originally Posted by pip08456
Read the first post.
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Thanks for your helpful reply.
The reason I asked was when I was researching this to better understand things, I came across this on the Wikipedia page:
https://en.wikipedia.org/wiki/DOCSIS
Quote:
Throughput
The first three versions of the DOCSIS standard support a downstream throughput with 256-QAM of up to 42.88 Mbit/s per 6 MHz channel (approximately 38 Mbit/s after overhead), or 55.62 Mbit/s per 8 MHz channel for EuroDOCSIS (approximately 50 Mbit/s after overhead). The upstream throughput possible is 30.72 Mbit/s per 6.4 MHz channel (approximately 27 Mbit/s after overhead), or 10.24 Mbit/s per 3.2 MHz channel (approximately 9 Mbit/s after overhead).
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so I was curious if the 2 channels we have now can, in the real world, be pushed to get nearer these theoretical limits (2 channels ==> 54Mbps). The only reason I went to 350/20 is for the upload and so if our CMTS is stuck on 2 channels for the time being, would this preclude higher uploads even though, on first reading, the DOCSIS page hints at more.
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29-08-2017, 16:44
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#14
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FORMER Virgin Media Staff
Join Date: Dec 2010
Location: Warrington
Posts: 4,737
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Re: 4 upstream channel bonding - post here
Quote:
Originally Posted by ianch99
Thanks for your helpful reply.
The reason I asked was when I was researching this to better understand things, I came across this on the Wikipedia page:
https://en.wikipedia.org/wiki/DOCSIS
so I was curious if the 2 channels we have now can, in the real world, be pushed to get nearer these theoretical limits (2 channels ==> 54Mbps). The only reason I went to 350/20 is for the upload and so if our CMTS is stuck on 2 channels for the time being, would this preclude higher uploads even though, on first reading, the DOCSIS page hints at more.
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More channels = more speed.
Though having more channels doesn't mean you'll get more speed, it does mean Virgin can push more speed down the line.
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31-08-2017, 19:47
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#15
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Sulking in the Corner
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Re: 4 upstream channel bonding - post here
RG41
Upstream bonded channels
Channel ID Frequency(Hz) Mode Power
(dBmV) Modulation Channel Bandwidth(Hz) Symbol Rate (ksps)
6 39400000 ATDMA 45.3 64 qam 6400000 5120
8 25800000 ATDMA 45.3 16 qam 6400000 5120
7 32600000 ATDMA 45.3 64 qam 6400000 5120
5 46200000 ATDMA 45.3 64 qam 6400000 5120
When I use the SNMP browser call on the Hub 3, my mini-slot size has dropped from 4 to 2.
---------- Post added at 19:47 ---------- Previous post was at 19:40 ----------
Quote:
Originally Posted by ianch99
Thanks for your helpful reply.
The reason I asked was when I was researching this to better understand things, I came across this on the Wikipedia page:
https://en.wikipedia.org/wiki/DOCSIS
so I was curious if the 2 channels we have now can, in the real world, be pushed to get nearer these theoretical limits (2 channels ==> 54Mbps). The only reason I went to 350/20 is for the upload and so if our CMTS is stuck on 2 channels for the time being, would this preclude higher uploads even though, on first reading, the DOCSIS page hints at more.
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You would get the 20 meg if the upstream contention is low.
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