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VM to extend Hub 4 availability
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Old 15-05-2020, 22:57   #16
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Re: VM to extend Hub 4 availability

Quote:
Originally Posted by Kushan View Post
The bit you're missing is the confusion between the different technologies the various providers use. When discussing the above, we were referring to the DSL tech that almost all providers other than Virgin use - the one that piggybacks off the phone line going into your home.

Virgin uses a completely different technology, instead using a shielded coaxial cable going to your home. This cable, being shielded, is capable of much more bandwidth over longer distances than a copper phone line (or aluminium, for some unlucky folks).

In the UK, Openreach (Formerly BT before they got split off) builds and maintains the majority of the phone network and thus providers like Sky, Vodafone, TalkTalk, etc. all piggyback off of this network. Occasionally they'll have their own equipment in cabs and that kind of thing (Known as unbundling), but the technology to get from your house to them is the same - some form of DSL.

There's ADSL, ADSL2, VDSL, etc. and while there's a lot more to it, essentially the different technologies focus on making better use of the bandwdith available in a phone line, sometimes in tandem with the line being "shorter". So ADSL has a range in terms of several KM, but max speeds are single digit's of Mbit, whereas VDSL can go up to ~80Mbit (Or ~120Mbit depending on other factors) but with a much shorter range of under 80M.

All good stuff. All utterly irrelevant to Virgin.

Virgin, using coaxial, doesn't use DSL, it uses DOCSIS which is basically trying to do the same sort of thing but in a completely different way and able to do it in an arguably more efficient way as corruption is less of an issue. You also don't need to make room for voice calls - because don't forget, a phone line's primary purpose is for voice calls, not data (though I'm sure some would argue otherwise).

Like with DSL, there's different versions of DOCSIS, from 1.0 up to 3.1 (or 4.0 depending on who you ask). Like with DSL, each newer version focuses on making more efficient room of the frequencies involved to offer higher speeds.

The whole "gig1" thing and its limited availability is purely down to Virgin having to upgrade their network to the latest DOCSIS standard. That's also why you need a new hub, because everything from your Modem all the way to Virgin's equipment has to be on the same or greater version to take advantage of it. There's more to it as well, even in areas offering gig1 there's plenty more for Virgin to do to unlock more spectrum in their cables to be able to make full use of it but that will take years.

For completion, there's 1 other kind of internet provider I haven't mentioned (ignoring mobile/wireless) - Fibre.

Despite Virgin claiming they've got a fibre optic network for years and BT very quickly following suit when they launched VDSL (Aka "Infinity"), if you've been paying attention we've been talking about copper cables this whole time. The fibre is "down the line" somewhere, a cab or a lamp post or something. There are providers that offer pure fibre connections, fibre right up to your house. Fibre is the best you can get, it goes further and has almost unlimited bandwidth depending on what you plug in either end of it - but it's expensive to roll out, which is why it's been largely reserved for businesses and people able to afford hundreds of £ a month. As Openreach pushes fibre closer to your home, eventually it gets more cost effective to just push fibre down that "last mile". Even virgin doesn't tend to build new coaxial deployments these days, instead preferring to deploy pure fibre where possible (though still using some of the same equipment in your home for...reasons). We've finally hit that tipping point, so expect more fibre options in your area over the next year or so.
There is no-one's equipment other than Openreach's in any cab. LLU equipment is in the exchange.

Don't know of any fibre on a lamp post in this country certainlt not Openreach kit.

VDSL can go further than 80m you are thinking of G.Fast.

Re G.Fast. I know it was originally planned to be distributed from telegraph poles as well as a bolt on cab but I know of none of this actually going ahead.

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Last edited by pip08456; 15-05-2020 at 23:00.
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Old 16-05-2020, 01:25   #17
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Re: VM to extend Hub 4 availability

I can't edit my post but you are quite correct, pip.

Though I am pretty sure BT did roll out some g.fast and some of it did end up on telegraph poles, at least before they canned the whole thing because you may as well just run glass at that point.
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Old 16-05-2020, 02:56   #18
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Re: VM to extend Hub 4 availability

The whole G.fast project was a nightmare our area was on one of the lists to get it I know a openreach senior engineer he had started to add the pods to cabinets got told to stop as the program was on hold but weeks later told to start again but it only lasted about a week and then he was told program was cancelled in this area. That was at the end of 2018
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