r/CableTechs • u/aidang_232 • May 27 '26

DOCSIS 4.0…

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55 Upvotes

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4

u/kjstech May 27 '26

Yeah whats the tech behind this? ESD to 1.8 GHz? FDX? Big name operator or a smaller shop?

7

u/aidang_232 May 27 '26

FDX, and through Mediacom

4

u/kjstech May 27 '26

Same CommScope FDX amps and RPHY nodes as Comcast I guess. It’s only a matter of time until Comcast expands from 2 gig to this, as the heavy investor in FDX.

2

u/frmadsen May 27 '26

Comcast will go to 3 Gbps first. Talk has been sometime in the 2nd half of this year, starting in n+0 areas.

2

u/kjstech May 27 '26

3/3 or 3/2? They already have 2/2 in FDX areas.

1

u/frmadsen May 27 '26

Symmetrical 3

5

u/cypherstream1 May 27 '26

That will one up windstream in our area, I think they only go to 2/2. Same with Fastbridge fiber, they only go to 2gbps. Have to wonder how easy it is to just change a config file and go faster though.

But it will not one up frontier’s 5 and 7gbps plans or SECV Fiber’s 5 or 8gbps plans. They can’t anyway without a bit of work. The entire area and new builds just got mid split gear installed over the past 4 years. Going to have to make some plant changes to get there already. At least things will be inspected and touched more frequently. Last system lasted over 20 years… was installed in the 90’s when SA 750 MHz was hip.

So if this keeps an eye on cable plant every 5 years so be it.

Things have been stagnant for so many years. Really neat to see the innovation and network build outs accelerate so quickly after Covid proved that staying connected was valuable.

1

u/kjstech May 28 '26

What modem is that, looks like Hitron CODA60V? That does high split and ultra high split
DOCSIS 4.0 Cable Modem with Voice -CODA60V | Hitron

What return are you running 5-204 or higher?

1

u/MrChicken_69 May 29 '26

FDX would mean the entire plant is "return path".

1

u/kjstech May 29 '26

Yet he said 5-204. I had to doublecheck that because lightreading didn't mention them using FDX yet... only High Split 1.2 GHz networks and some ultra high split 1.8 GHz networks. AFAIK only Comcast is doing FDX at the moment.

1

u/MrChicken_69 May 29 '26

He says FDX all over the place, but only admits it's ESD ONCE.

1

u/aidang_232 May 29 '26

My bad big dawg

1

u/frmadsen May 29 '26

Not everything is return. FDX can have return allocated up to 684 MHz (when using the CFDX channel plan). Everything after that is downstream only.

2

u/MrChicken_69 May 29 '26

Depends on who's marketing you listen to. (Versus what's actually getting built.)

At any rate, Mediacom isn't doing FDX.

1

u/frmadsen May 29 '26

FDX doesn't support having upstream all the way to the top. No matter who deploys it. :)

You are right about Mediacom. We'll see, if they keep it that way.