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: 17 November 2015 17 November 2015
Many claims, little data. Arun Hiremath suggests Ikanos has entered the promised land of G.fast chips ready to go in high volume. Their engineering is strong, harvesting the best of earlier companies Globespan, Virata, Conexant and the old Ikanos. CTO Debu Pal is a veteran of Bell Labs and DSL pioneer Amati and studied with the legendary Thomas Kailath at Stanford.
The data they provide for now is unfortunately limited. They have a modem/cpe chip and a single port distribution point chip.
- Published: 28 October 2015 28 October 2015
35b for Germany, bonding for AT&T/BT advertising. Vague claims of "up to 100% improvement" don't tell me what the result will be for most customers, which is what engineers reading this need to know. I doubt the 35b chips are delivering the 250 megabits down Broadcom salesmen promised customers for delivery about a year ago, but they haven't released data. On 35b, everyone in the industry is waiting to find out whether the tweaks to VDSL really will double downstream speeds. We need test results.
The desire for these chips is clear, if they deliver as hoped. Germany's DT and England's BT calculated the cost of all the field terminals in the original plans for G.fast and, the financial side of the companies balked. England's choice was to squeeze everything they can from existing terminals, increasing distances far beyond the ~100 meters in the original G.fast design. In their early testing, they are shooting for 330/50 to many homes with what I call G.halffast.
- Published: 13 October 2015 13 October 2015
BT thinks the current G.fast is too conservative and the standard needs to be changed for more performance. Gavin Patterson is telling the government BT is going to deliver a gigabit. He's arguing BT shouldn't be broken up because BT is building "the best network in Europe." But his best network is running at 330 megabits while cable around the world is going to a gigabit. Comcast is about to offer a gigabit to 40 million homes.
The order came down from the top: make it faster. The same thing is happening at AT&T. They've promised 12M lines of "GigaPower," much of which will be G.fast. But it's not a gigabit. So AT&T is leading the move for a new standard with more speed.
BT Openreach's latest update lists key developments they expect will increase speeds:
- Published: 13 October 2015 13 October 2015
An exceptional event returns. In 2015, BT. AT&T. Swisscom. Broadcom. Sckipio. Ikanos. Alcatel. Huawei. ASSIA. All sent a senior tech guy, often the CTO. It went beyond a great education. The future of G.fast was defined in a way you only expect in ITU standards.
Attendance was good but not too many for lively debate. I chaired and ensured very point of view was expressed. We focused on key questions including how to get to the gigabit speeds promised. Trevor Linney of BT made the case for long reach from cabinets rather than distribution points. The people who wrote the standard explained just what it meant.
- Published: 11 October 2015 11 October 2015
Electrical power control system repeatedly knocks out G.fast. While vectoring can reduce most interference, it does not eliminate all of it. TeliaSonera was disappointed as "user links were frequently interrupted, severely affecting G.fast performance."
Using a signal analyzer, they found the cause was an instantaneous high-amplitude pulse interference from an electrical power control system located near the basement. Fortunately, the standard allows multiple mode determined controlled by software. They were able to solve the problem with anti-pulse interference processing.
- Published: 05 October 2015 05 October 2015
Didier Boivin was Alcatel's General Manager for DSL chips at the turn of the century. Alcatel had won huge American contracts for DSLAMs and were using chips from their own Alcatel Micro division. Other companies had to work well (interoperate with) the Alcatel chips. It wasn't easy for the industry to come together and do the necessary common work for interop.
Today, Didier is Sales & Marketing Vice President of Metanoia Communications. Metanoia chips have to work well with Broadcom and Sckipio, the G.fast leaders.