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 August 2017 23 August 2017
Customers want 212 MHz but development is still needed. Tom hopes for the first half of 2018, but notes, "The timetable for volume deployment is dependent on the chip suppliers." One European telco was told not to expect much until well into the year. I wouldn't be surprised if few customers are connected until late in the year.
Adtran demonstrated two DSLAMs with Deutsche Telekom. One used Sckipio chips and delivered DTA. DTA allows higher effective speeds by allowing different upstream/downstream splits for each user. Since most systems are configured for a 5-1 or higher upstream/downstream split, the improved upstream can be 5X.
The second DSLAM used Broadcom chips and 212 MHz of spectrum but without DTA.
212 MHz, in theory delivers almost twice the bandwidth of 106 MHz, raising speeds on very short loops to ~1.5 GHz and higher. The higher speeds of course require a much more robust vectoring engine; until that's demonstrated, everyone will be cautious. AT&T just made a major announcement of G.fast at 500 megabits; they don't think the faster gear is ready.
The chips and equipment will soon be available, but the systems will require substantial additional development work. The step from a single line demonstration to 16 and 48 ports will be particularly challenging given the calculations necessary for high speed vectoring,
Let's see what Broadcom and Sckipio bring to the October BBWF in Berlin. Adtran, Calix, Huawei, Nokia, Xyzel, and ZTE will also be exhibiting. The Broadband Forum will have a special event, BBF Access Europe, and an interoperability demonstration. On the 29th, the Forum will come to Las Vegas for a BBF Access North America. (Don't be confused by the similar names. BBF is the industry organization once known as the ADSL Forum but renamed to the Broadband Forum when fiber became important. The BBWF is a conference run by Informa.)
Salesmen are making promises but engineers are looking for proof.
(Incidentally, this year's BBWF has a strong group of telco speakers. If I have the travel funds, we'll go.)
Stanton and his engineers were interesting to listen to at the Adtran Huntsville event, but the real highlight was the dinner at the Space & Rocket Center underneath the 350 foot Saturn V - a real one. Until you've seen it, you can't imagine just how large it is.