In 2016, G.fast looked very promising.
Thousands worked at developing and deploying.
It wasn't enough.
Most carriers are investing
in fiber or 5G instead.
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: 16 May 2016 16 May 2016
Coming May 19 at Paris DSL Summit. I got this wrong when Calix announced G.fast over coax. I thought it a niche product because I didn't realize the DirecTV deal brought millions of lines of coax to AT&T. AT&T is not a niche.
CTO Rami Verbin is going to present unprecedented G.fast performance live Thursday. In the release below, the weblink also takes you to some video including from AT&T's Eddy Barker. Adtran's Ronan Kel will open the show with a live demo of a related DSLAM.
I doubt the 750 up, 750 down that AT&T is discussing is quite ready, but it's coming. Double speeds will require the next generation of chips that extend frequencies to 212 MHz. That's on everyone's roadmap and Sckipio is optimistic about early delivery.
AT&T and Telus provided quotes, a strong vote of confidence. "With dynamic bandwidth allocation, we believe AT&T can offer up to 750Mbps in both downstream and upstream performance over coax with today's chipsets," said Eddy Barker, Assistant VP of Technical Design & Architecture at AT&T. "In the next generation G.fast chipsets, we should be able to double that target â€“ achieving as much as 1.5Gbps in each direction.
"DBA is a G.fast game-changer," said Tim Fell, VP of Video & Broadband Services at TELUS. "In the race to deliver ultra-fast broadband, the ability to offer affordable symmetrical services will give telcos the flexibility required to meet our customers evolving high speed Internet needs."
Whether over twisted pair or coax, telcos with copper will now be able to offer better upstreams than cablecos. Cable upstreams are stuck at 5 megabits to 35 megabits, including in one DOCSIS 3.1 system. (Unannounced but in production use.) DOCSIS 3.1 provides for a gigabit upstream but that requires reshuffling spectrum usage and sometimes plant upgrades. Since CableLabs announced full-duplex cable, at least some cablecos are waiting for that rather than upgrading for now. Full duplex is still in the labs, but Belal Hamseh is confident of success. Alcatel, release below, is presenting a "proof of concept" full duplex rig at the Cable Show this week, running well into the gigabits. I doubt full duplex cable will be in wide use for 3-5 years. Advantage, telcos.
500 megabits to 800 megabits is realistic for today's G.fast from the basement or a nearby distribution point.. The bandwidth can be split in either direction and Sckipio demonstrated 750 megabits upstream in January. 400/100 or 500/200 would be an attractive offering. I'd buy it at any plausible price. Jennie does video and we have big files.
I've spent two months backing up video to Amazon's unlimited cloud drive at the top speed Time Warner will sell me, 20 megabits. I'll be cheering Rami on in Paris.
Here's the pr. I'll be speaking with all the players, including Alcatel, later this week in Paris.
Customers will experience up to 1.5Gbps in total performance over existing copper wires
Nokia Bell Labs achieves world's first 10 Gbps symmetrical data speeds over traditional cable access networks
16 May, 2016