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IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
Reviews:
·Verizon Broadban..
·Comcast
reply to pflog

Re: Getting 305/65

said by pflog:

said by IowaCowboy:

They could technically do it over coax by using a DOCSIS 3.0 modem with 8x4 channel bonding. No plant construction required, just have the customer pick up an 8x4 channel bonding modem at the CC office, change the billing code, and provision the modem accordingly.

Technically speaking, that is true with 8 channels if they were the ONLY person on those channels. 38*8 is 304 Mbps. That's not a lot of head room at all. All it'd take is one person on a 50/10 plan on the same channels and they're down 16-17%.

8x4 goes up to 343 Mbps downstream.

Source: »www.arrisi.com/product_catalog/_···UG11.pdf
--
Romney-Ryan and Scott Brown are the Right Choice as they are Hope & Change you can count on.


tshirt
Premium,MVM
join:2004-07-11
Snohomish, WA
kudos:4

still a poor use of bandwidth for that tier, and with the ability to use fiber/metroE shows the long legs of the HFC plant.



pflog
Bueller? Bueller?
Premium,MVM
join:2001-09-01
El Dorado Hills, CA
kudos:3
reply to IowaCowboy

MiB/s vs. MB/s, but ok fine, assume 343. It would still be asinine to provision a 300/65 connection over DOCSIS.
--
"Women. Can't live with 'em, pass the beer nuts." -Norm


n_w95482
Premium
join:2005-08-03
Ukiah, CA
reply to IowaCowboy

said by IowaCowboy:

said by pflog:

said by IowaCowboy:

They could technically do it over coax by using a DOCSIS 3.0 modem with 8x4 channel bonding. No plant construction required, just have the customer pick up an 8x4 channel bonding modem at the CC office, change the billing code, and provision the modem accordingly.

Technically speaking, that is true with 8 channels if they were the ONLY person on those channels. 38*8 is 304 Mbps. That's not a lot of head room at all. All it'd take is one person on a 50/10 plan on the same channels and they're down 16-17%.

8x4 goes up to 343 Mbps downstream.

Source: »www.arrisi.com/product_catalog/_···UG11.pdf

343 without factoring in overhead, 304 with. It mentions it right below where you looked .
--
KI6RIT


IowaCowboy
Iowa native
Premium
join:2010-10-16
Springfield, MA
Reviews:
·Verizon Broadban..
·Comcast

1 edit

said by n_w95482:

343 without factoring in overhead, 304 with. It mentions it right below where you looked .

The Zoom 5341J also goes up to 343 with its 8x4 channel bonding.

Source: »www.zoomtel.com/products/cable_overview.html

I think they should make the 305 available on the coax plant as well but for a lower monthly price and the $1.99 change of service fee if we pick the modem up at the office.

I also think the modulation also affects the speed. Our area is 256 QAM downstream and 64 QAM upstream.

Edit: I did not see 304 mentioned but a properly engineered HFC plant could achieve 305 by splitting larger nodes, ditching analog TV, declaring all D2 modems end of life (since D3 manages network resources better), adopting switched digital video, eliminate as much ingress as possible.

I also heard that DOCSIS 3.1 is possibly in the cards.

--
Romney-Ryan and Scott Brown are the Right Choice as they are Hope & Change you can count on.


bobjohnson
Premium
join:2007-02-03
Orlando, FL
Reviews:
·AT&T U-Verse
·T-Mobile US
·Sprint Mobile Br..

Yeah, and while they're at it they should kick the other 200 homes off the node so you can actually get all the bandwidth and uptime that your enterprise QoS contract provides for you... All for $99 a month, right?

But seriously, with HFC you have fiber in your backyard. It would be a terrible business decision to completely saturate a node for one customer. If you have a NEED for 305/65 then you should also have the money for the installation cost.
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n_w95482
Premium
join:2005-08-03
Ukiah, CA

1 recommendation

reply to IowaCowboy

said by IowaCowboy:

said by n_w95482:

343 without factoring in overhead, 304 with. It mentions it right below where you looked .

The Zoom 5341J also goes up to 343 with its 8x4 channel bonding.

Source: »www.zoomtel.com/products/cable_overview.html

I think they should make the 305 available on the coax plant as well but for a lower monthly price and the $1.99 change of service fee if we pick the modem up at the office.

I also think the modulation also affects the speed. Our area is 256 QAM downstream and 64 QAM upstream.

Edit: I did not see 304 mentioned but a properly engineered HFC plant could achieve 305 by splitting larger nodes, ditching analog TV, declaring all D2 modems end of life (since D3 manages network resources better), adopting switched digital video, eliminate as much ingress as possible.

I also heard that DOCSIS 3.1 is possibly in the cards.

Overhead is overhead, there's no getting around it. It's like saying that you get 54 Mbps on 802.11g wireless, or 480 Mbps with USB 2.0. It just isn't going to happen. They quote the theoretical max because it is easy to calculate. Real-world numbers will always vary, and will always be below the theoretical max. 305 Mbps downstream on 8 channels isn't going to happen. I don't expect Comcast to attempt it via DOCSIS until 16 or 24-channel bonding is around.
--
KI6RIT