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: 02 August 2017 02 August 2017
Deutsche Telekom and NetCologne have tested it. Adtran thinks they will be able to ship soon, but NetCologne doesn't expect much until next year. Broadcom's Greg Fischer confirms to me, "We entered production with 212 MHz G.Fast devices last quarter and also released production standards compliant iDTA. We’re working with standards groups to assure same with cDTA."
212 MHz should deliver as much as a gig up to about 200 meters.
That covers most buildings. Almost all would be covered by a second system is deployed for the upper stories.
Broadcom has a "policy of not publishing data on our devices." That goes back to the days of Henry Nicholas, apparently a fan of Sun Tzu. (Henry, a brilliant engineer, is a fan of many things. See this and other articles in the LA Times.)
NetCologne's demo ran at 1.6 gig down, 200 meg up, close to the predicted maximum speed of the technology. The DT/Adtran was only specified as "over a gigabit." Lacking more details, I wondered whether there was a problem with chip performance. Questions like that are inevitable when information is limited.
Vectoring noise cancellation is of course a challenge at the high speeds, so everyone will be waiting for demonstrations with a full binder. Australia and others are interested in remote power, also tbd. Broadcom has done innovative work with local error correction, and I'd like to see that shown as well.
Most important, traditional industry practice is to have a second source. Broadcom has just been locked out of the crucial German market in a patent dispute. They also lost a preliminary decision at the U.S. Trade Agency. They happen to be right on the substance; Tessera is demanding an unreasonable royalty. But that holds little weight in the absurd patent system.
Stuff happens. A factory can catch fire. A huge customer can demand priority. A development program can fall behind. (35b was promised for 2016. DT now says it won't be ready until h2 2018.) Everyone wants to be protected.
Sckipio is hard at work on 212. It will be reassuring when the two demonstrate interop, as the lead at a very large telco discussed with me.
Here's the pr from last fall