- 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
Dark Green: 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 Pink: Smaller carriers in Germany, Norway, Finland, Japan
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.
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.
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.
Broadcom has a chip that runs something like G.fast and can work with reverse power. Anything else is uncertain and the reports contradictory. Other reporters are emailing me in Amsterdam asking for details but Broadcom turned me away from their walled in demonstration.
What we know: Adtran showed a unit with eight ports from using 2 chips. Two ports were vectored. They told me that vectoring worked across the four ports on a single chip but not across chips to allow eight or sixteen connections. Adtran also showed reverse power working with the Broadcom chips. The system also supports VDSL, apparently on the same chip.