[Lex Computer & Tech Group/LCTG] Comcast experimenting with hollow core fibre optics

Mitchell I. Wolfe mwolfe at vinebrook.com
Wed Feb 8 12:03:13 PST 2023


I think Drew lives in Florida.

The situation is somewhat different in the metropolitan Boston area. For 
example, in Lexington with three available wired internet providers 
(Comcast, Verizon FIOS, and Astound/RCN) there is more competition.

I pay RCN about $75 monthly (without sign-up promotion) and get close to 
the advertised 250 Mbps speed I am paying for. I'm using an Arris CM820 
DOCSIS 3.0 cable modem bought used years ago for $20 on eBay. RCN offers 
up to 1.2 Gbps.

Comcast messes around differently in different markets...

-- Mitch

On 2023-02-08 14:29, Drew King (dking65 at kingconsulting.us) wrote:

> Correct. According to the specifications, they should be able to offer 
> residential customers bandwidth more like fios. For whatever reason, 
> every time I have asked to pay more money to get more speed they have 
> turned me down.
> 
> If Comcast practically could sell you more than 25MB per sec up stream 
> residential today they would be offering it to people willing to pay 
> for it, only they're not. I don't know of any residential Comcast 
> customers that have more than 25MB up.
> 
> 4.0 Is going to change things In such a way that it will become 
> possible for them to realistically offer and deliver on higher upload 
> speeds than what they are willing to offer today.
> 
> Something is holding them back from offering residential customers 
> higher bandwidth for a higher price today.
> 
> --
> Drew King
> 
> On February 8, 2023 1:27:31 PM EST, Rich Moffitt <rich at richmoffitt.org> 
> wrote:
> I thought DOCSIS [1]3.1 already supported upstream channel bonding 
> upwards of 1 Gbit/s. I recall setting up an office in downtown Boston 
> in 2012 that used DOCSIS 3.0 and the Comcast Business connection was 
> 100/100 Mbit/s symmetrical.
> 
> I think 4.0 sounds very interesting, but for residential use cases, 
> wouldn't the ISP have to be willing to support higher upstream rates 
> through other parts of their network, and not so much the "last mile?"
> 
> -Rich
> 
> On Wed, Feb 8, 2023 at 12:51 PM Drew King <dking65 at kingconsulting.us> 
> wrote:
> 
> I'm anxiously waiting for DOCSIS 4.0. This is the specific technology 
> that allows those of us on Comcast, and other non-FIOS providers, to 
> finally get more than a measly 25 MB/sec upload speed.
> 
> https://www.cablelabs.com/technologies/docsis-4-0-technology
> 
> Besides allowing for ultra-fast speeds, one of the best things about 
> 10G technology (another name for 10 gigabit per second internet) is 
> that it won't require any new connections to be installed, which means 
> you won't have employees from your ISP digging up your yard.
> 
> Now that Comcast has demonstrated how DOCSIS 4.0 modems and 10G can 
> work together to deliver multi-gig internet speeds, the company is 
> starting a nationwide rollout which it says will reach 50 million homes 
> and businesses in the U.S. before the end of 2025.
> 
> If you're a Comcast customer looking for faster internet speeds, the 
> company plans to begin offering 2-gig plans next year.
> 
> On 2/8/2023 11:59 AM, Larry Wittig wrote:
> 
> https://corporate.comcast.com/press/releases/comcast-first-isp-hollow-core-fiber-faster-speed-lower-latency
> They have a 40 km cable near Phily, and it can transmit in both 
> directions simultaneously.  The article says they are getting ready for 
> 10G.
> 
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> --
> Drew King
> 
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Links:
------
[1] https://en.wikipedia.org/wiki/DOCSIS
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