In 2016, G.fast looked very promising.
But only BT & Australia's nbn remain
Dark Blue: Firm commitments from incumbent: BT (10M), Belgacom, Australian NBN, Swisscom, Austria, Bezeq Israel, Chunghwa Taiwan, Telus Canada, Telekom South Africa, SK Korea, (U.S.) AT&T, Century, Frontier, Windstream, Belgium, Omantel
Mid Blue: Smaller carriers in Germany, Norway, Finland, Japan
- Published: 23 December 2014 23 December 2014
Tweaking existing high end VDSL2 chip - and the pr. VDSL2 30 MHz profile 30a is generally described as 100 meg down, 100 meg up. Combine the two for your press release and you're at "200 megabits." Tweak a few parameters and you can claim "300 Mbps VDSL Right Now." Lantiq did that. Besides one-upmanship, it provides a way to telcos to advertise "300 megabits" to counter cable promises of 200, 400 and even a gigabit. Aethra, working with Lantiq, has delivered units to Orange Poland. I believe Broadcom is doing similar.
Kabel Deutschland CTO Lorenz Glatz two years ago explained his company strategy. "Whatever speed Deutsche Telekom, we'll offer twice the speed at the same price." Euro-DOCSIS 3 easily goes to 400 shared and delivers > 200 meg 95+% of the time. In 12-24 months, DOCSIS 3.1 will take that to a gigabit. Deutsche Telekom, building a 50-100 megabit VDSL network, fears they'll be left behind.
Telcos fearing aggressive cable companies are asking for more (advertised) speed. They are also disappointed in G.fast short reach and 16 home limit. Vendors are listening and hence promising a new class, Midi-DSL, mid-range bet G.fast and G.vector, promising higher speeds.
- Published: 22 December 2014 22 December 2014
- Vplus delivers speeds exceeding 300Mbps on a single copper pair
- Vplus offers unmatched throughput, density and cost on 200-500m copper loops
- Vplus is a simple extension of existing standard VDSL2 vectoring technology
- Published: 21 December 2014 21 December 2014
G.fast 48 ports far away. Huawei;s entry into Midi-DSL uses frequencies to 35 MHz. They also have introduced a new coding technology, optimized signal spectrum, improved transmission efficiency, and probably much more. Here's their pr.
- Published: 10 December 2014 10 December 2014
Demo'd live at BBWF. Great Britain has 4,000,000 "distribution points," simple copper boxes generally without power. Bringing electricity to each box could double the cost of G.fast deployment, which is targeted at $100-250 home. Add monthly charges as well..
To many telcos, the biggest advantage of G.fast is "parasitic power." The G.fast gear gets power from the customer gateway, not from the telco system. Instead of running a powerline to each box - often very expensive - the G.fast DSLAM draws power from each user's modem. That allows telcos to pop mini-DSLAMs on poles, in small underground spaces ....
The standards committee was confident parasitic power would work well.
- Published: 08 December 2014 08 December 2014
Israeli VC's put up the shekels. Sckipio's chips were the hit of the Amsterdam event; they are working and starting to come in meaningful quantities. That progress persuaded Eitan Bek of Pitango, Israel's largest VC, to lead other Israelis in a $17M round. They timed the release for the day after the official approval of the G.fast standard with many of their contributions.
Loring Wirbel sees Sckipio and Broadcom in a G.fast race, although Ikanos, HiSilicon and others may disagree. Broadcom has modified their VDSL designs for higher frequencies and many of the G.fast ewqyurenebts. Sckipio chose instead "purpose-building them to achieve optimum power for TDD-based bundles." (Loring) Loring, a friend, was long the finest journalist in chips and network technologies. He's moved on to being an analyst at Linley Group, the best chip analytic house.
- Published: 18 November 2014 18 November 2014
80+% of Brits live in single family houses, far fewer than several other European countries. BT and AT&T have natural small nodes, making 8-16 port boxes appropriate. G.fast has a profound problem in other territories, where far more people live in apartment buildings which cannot today be served with G.fast.
I first thought apartment buildings could be served by simply using multiple boxes At BBWF several told me the interference issues are insurmountable without vectoring. Vectoring 48 lines is impractical with today's chips. They don't have enough processing power and if they did there would be a heat problem.
BT has about ~4M "distribution points" on poles and underground. There's an average of ~8 customers connected, and only a few have more than 16 drops.