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Gfast map July 2017

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

Light blue: Smaller carriers in Germany, Norway, Finland, Japan

Green: Incumbent likely:  France, Germany, & Poland  

Gfast-Deployment---LincolnThe right (straight) cable allows remarkable choices. Bill Bittencourt startled the Summit with new results from the lab and the field. They said it couldn't be done, but Calix customers are proving it is possible to use multiple DSLAMs. Instead of being limited to 16-24 customers, that can be doubled and possibly tripled. In early testing, the second DSLAM resulted in less than a 2% loss. Many North American buildings have straight cable – otherwise known as CAT1 or “station wiring” – from a distribution point to each unit. Geoff Burke explains, "In essence, what this means is that typical MDUs have insulated wiring from the Distribution Point to the unit, which greatly minimizes cross talk and loss.

Thus, given the physical isolation from cross talking pairs, multiple DPUs can be deployed without the need for cross-unit vectoring. VDSL2 and have minimal interference over in-building cabling.

My six story building has about 55 apartments, all connected to one box in the basement. If we had straight cable, every apartment could have 500-800 megabits, uncontested, from fiber to the basement.

On straight cable, each customer gets an additional 50-100 megabits because VDSL interference is minimal. Most deployments reserve (notch out) the first 19-21 MHz of prime spectrum to protect VDSL. That's proving unnecessary in these buildings.

Calix built a test bed in the laboratory, simulating a three story, 32 unit MDU building. Receiver distances were between 20 & 100 meters. (Diagram below.) The lab results confirmed what Calix customers were seeing in the field.

"Conventional wisdom was completely wrong," Bill concluded. 

212 GHz and cDTA are soon shipping from Adtran. True gigabit is here. Sales takeoff is almost in sight, probably Q1 2018.
Australia confirms 1M, AT&T is ready to ramp, DT finally is moving. Omantel and Telkom South Africa are now on the map. Almost all telcos are now choosing for large buildings when they don't go FTTH. MNet Cologne and Chunghwa Taiwan have changed from fiber all the way to in the basement.

212 MHz and cDTA Are Ready: Adtran
Frank Miller of Century: Will be Important to Us

Carl Russo: Since 2007, I've Been Turning Calix Into a Software Company

Adtran Chosen for Australia nbn Fiber to the curb.

nbn looking to a million lines. This one is big. Adtran is on a roll, with DT & AT&T also looking good for 2018.

1,400,000,000 In The Works. 1.4 Gigabits
South Africa & Connecticut Go Nokia

Omantel: 90% Fiber &


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