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[Black Sheep]

That's just where the two technologies cross, Weaver ........... you need to follow the G.fast line to the end. 

[Weaver]

@Blacksheep - it goes down soo steeply though. You're going to have half a dozen very happy customers at the high end. I wonder if they will cap it down a lot?

[sevenlayermuddle]

Can anybody enlighten me what these nodes/dpus/whatever will actually look like, on the ground?

Interested as I live in an AONB, which means planning control can get awkward.  Also because I would anticipate that some of the land belonging to my home, which already has buried ducts, might be a likely site.

[clayyy]

Can anybody enlighten me what these nodes/dpus/whatever will actually look like, on the ground?

not got a link but i've seen pictures of green boxes around head height added to telegraph poles in some of their examples. others would be under the pavement

@Blacksheep - it goes down soo steeply though. You're going to have half a dozen very happy customers at the high end. I wonder if they will cap it down a lot?

they've stated maintaining at least 100mb during peak times i think. i really dont hope they just install at cabinets first, boost those already getting good speedsthen start touting 'average speeds' for a postcode while conveniently never getting round to remote nodes in the area. im a bit paranoid at this point

[kitz]

Can anybody enlighten me what these nodes/dpus/whatever will actually look like, on the ground?

There's several photos in this thread of the overhead poles version taken by someone as they were being installed near him.   It looks like BT see this as the way forward to reach some of the more difficult areas.     Knowing that they appear to have started installation of FTTrN in some areas outside of the test areas, was partially the reason for my wondering about the new trials from the cab.

Re UG - See below for pictures someone emailed me - 

Also attached is a picture of the g.fast power cabs mentioned by BS  - also mailed but I think credit to the original source was someone from TBB.

[Black Sheep]

I was asking because the base frequency of FTTC is 17MHz while G.fast uses 17-106MHz (?), so I was wondering if there was a hybrid solution between the two technologies, though admittedly I don't know if that is possible. I'm trying to figure out if all the technologies can co-exist inside the cabinet.

I don't actually understand why there needs to be a big trial of G.fast from the cabinet. What needs to be done to the cabinet to enable G.fast if there are no nodes involved? Wouldn't it be a matter of changing frequences of the available MHz spectrum?

It's been mentioned previously on the forum about interference with other technologies inside the cabinet. At the time I posted that this wouldn't be a problem as the G.fast part would be outside in a node and the cabinet would be acting as a pass-through 'base'. But now if the G.fast will be stationed inside the cabinet isn't there a risk of an interference conflict between adsl, fftc and G.fast all next to each other or can they all co-exist?

PS. I'm more a cider guy!

Hi Bowdon ........ I believe (and it's only my opinion) that G.fast frequencies will probably begin at the 23Mhz mark through to 106Mhz. 

[ejs]

ND1602 was updated recently to v6.1.1, this document is the Access Network Frequency Plan, which defines the permitted frequencies. A section for G.fast was added. I think it effectively indicates 23-106 MHz, and the sloped edges of the graphs are just to allow for the noise that would be generated on adjacent frequencies.

[Black Sheep]

Thanks for the info, ejs 

[NewtronStar]

Of course, there are always going to be instances where it is not financially viable to fit a DPU for just one or two EU's. That's business, that's life.

My cabinet is 1Km from me and there are 30 premises who are using say 4 different distribution poles, would I fall into the viable category ?

[Starman]

My cabinet is 1Km from me and there are 30 premises who are using say 4 different distribution poles, would I fall into the viable category ?

I would hazard a guess and say that is what the trial is to determine were the cost to benefit analysis falls.

[Black Sheep]

Of course, there are always going to be instances where it is not financially viable to fit a DPU for just one or two EU's. That's business, that's life.

My cabinet is 1Km from me and there are 30 premises who are using say 4 different distribution poles, would I fall into the viable category ?

You've touched upon why that is impossible to answer ....... too vague the information to make any kind of judgement call. That's why we have a Planning department that has every single bit of information to hand, to decide the best place to install DPU's, all we can do is guess and that would be bordering on the insane. 

[NewtronStar]

That's why we have a Planning department that has every single bit of information to hand, to decide the best place to install DPU's, all we can do is guess and that would be bordering on the insane. 

Any guess is better than none at all even if the DPU was sited further away the broadband speeds would be a hell of allot better than this 1km FTTC cabinet even if the distanced was halved to say 500 meters my sync would be 65Mbps instead of 33-35Mbps

[Black Sheep]

Good guess. 

[WWWombat]

@ejs
Thanks for spotting the ANFP update. NICC had said it was due around now, but it is good to see details.

I spied 3 new G.Fast sections in this version of the document; one for G.Fast in the network, one for G.Fast at the user end, one for handshaking.

However, there was also an "unused" extra section for EO lines. I wonder if they'll start allowing VDSL2 from the exchange?

On frequencies...

While VDSL2 is prevalent, BT will only use the spectrum from 23MHz through to 106MHz for G.Fast. However, BT have identified a reduction in the 17-23MHz gap as one way to enhance G.Fast speeds, so we might see that change in the future.

G.Fast itself can use anything between 2MHz and 106MHz, when it isn't deployed alongside VDSL2. It is expected to jump to 212MHz in the future too.

If BT do ever want to use the 2-23MHz spectrum for G.Fast, it only needs a rewrite of the rules, but it would be possible where they prevented VDSL2.