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So very fast but extremely susceptible to interference and an extremely limited range.When BT first launched its VDSL2 FTTC service, profile 8a was selected, which used only 8.5 MHz bandwidth to deliver a maximum download connection speed of 40 Mbps. The use of a wider bandwidth allows VDSL2 to deliver greater speeds for households and business premises situated within about 750 metres of a fibre cabinet. In April 2012, BT implemented the 17a profile (using nearly twice the original bandwidth of profile 8c), allowing download connection speeds up to 80 Mbps. In the future, BT has the option to increase the bandwidth with VDSL2 even further (to 30 MHz), which would increase download speeds to well over 100 Mbps for premises close to the street cabinet.
The bandwidth used by G.fast is considerably wider than VDSL2 (about 6 to 12 times wider than current VDSL2 services). The use of higher frequencies inevitably limits the distance of transmission to a maximum of about 250 metres (and significantly lower than this for the highest speeds), due to strong signal attenuation at high frequencies. In the initial stages of G.fast deployment, G.fast technology will use the 106 MHz frequency band, although there will be the option to increase the bandwidth to 212 MHz in the future (to achieve even greater speeds).
Due to the frequencies used by G.fast, there will be a risk of interference to other services, including FM radio. Real G.fast deployments may require certain frequency bands to be ‘notched out’ to avoid interference with other services.
http://www.increasebroadbandspeed.co.uk/2015/what-is-gfast
G.fast versus Fibre to the Premises (FTTP)
So why is G.fast being developed when Fibre to the Premises (FTTP) (where fibre is laid all the way to the premises) could potentially provide even better performance than G.fast without its dependence on copper cables? The answer is cost. FTTP can be very expensive to implement (particularly in so-called ‘brown field’ deployments) with high labour costs. Austrian ISP A1 says that, even though FTTP remains its long-term vision, it considers G.fast as an “intelligent interim solution” until fibre has the same coverage as copper does today.
We certainly understand the frustration among some technology evangelists that the current deployment of FTTP is painfully slow since FTTP offers the ultimate in speeds and reliability. However, we have also witnessed the many challenges faced by Openreach engineers (shown below) laying cables in a BDUK project, with frustrating and time-consuming delays caused by numerous blocked ducts. Laying fibre to all homes and business premises in the UK would certainly be a very costly and onerous project! In 2008, Analysys Mason estimated that taking fibre to every UK home would cost as much as £28.8 billion (nearly six times higher than FTTC deployment, which is currently being undertaken).
https://mybroadband.co.za/vb/showthread.php/791913-1Gbps-over-existing-copper-lines-with-G-fastA nice graph of speed vs distance:
View attachment 330263
And will edit when I find out more about the upload capabilities.
EDIT:
All right, found some mentions:
For example, earlier this year British network operator BT said download speeds of around For example, earlier this year British network operator BT said download speeds of around 700Mbps and upload speeds at 200Mbps over a distance of 66 meters were achieved during a field trial. http://www.pcworld.com/article/2856...-get-closer-thanks-to-new-gfast-standard.html
But in Britain they are rolling out as:
So 50Mbps when it reaches the 300Mbit mark as a max. (about 250m)1. NGA2 G.Fast
* Up to 330 Mbit/s downstream
* Up to 50Mbit/s upstream
* Downstream prioritised rate 80Mbit/s
* Multicast enabled
http://www.ispreview.co.uk/index.ph...-fast-and-fod2-ultrafast-broadband-trial.html
EDIT2: Do note that all these trials are done on good quality copper that has been maintained better than the copper here by Telkom.
As part of that the current top speed of Openreach’s FTTP service will be lifted from 330Mbps (30Mbps upload) with the addition of 500Mbps (165Mbps Upload) and 1000Mbps (220Mbps Upload) tiers
http://www.ispreview.co.uk/index.ph...fast-pilot-lr-vdsl-broadband-trial-areas.html
It is not redundant if fibre is not going to make it to your area. Many low to middle income areas or small towns might take 5-10 years in which case if Telkom roll out this on their existing infrastructure it eliminates the market for fibre in those areas. It is a land grand nobody cares if you want fibre. They just want business if they give it to you on this or fibre it means you are serviced look for the next client.Where's the plans for lowering IPC costs instead of rolling out redundant technology.
Well not actually. Telkom still has over 2 million leased lines so even if they deploy this on a fraction of that infrastructure it still makes business sense as they don't need to deploy fibre which is expensive and risk loosing the bsuienss to another fibre provider.Too late im afraid, the Fibre train has arrived where u deal with providers who actually care about service, and not just milking u because u had no alternative
I can get 10mbps, but for some reason there is a lot of noise on my line all of a sudden. My exchange supports VDSL but doesn't help when said exchange is round about 3Km away.I cannot event get 10mb/s @ my exchange.
According to Wikipedia, for 100Mbit your loop length needs to be <500m. Good luck with that.
basically this will be rolled out to gated villages that have existing copper inside, and a cabinet outside on the curb
Telkom to offer 100Mbps DSL
Telkom CEO Sipho Maseko has revealed that they plan to deploy 100Mbps DSL services in South Africa using G.fast technology.
Hurrah Hurrah - if you live in one of the major cities. But what about us folk in the smaller towns e.g. Velddrif, just 150km from Cape Town. We struggle to even get the maximum speed of 4MBs that is on offer here. Really, unless they start rolling out better speeds than 4MBs to folk like us, I couldn't care less about all their hype.
Too late im afraid, the Fibre train has arrived where u deal with providers who actually care about service, and not just milking u because u had no alternative