Gfast map

gfast map copy


In 2016, 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

Light Blue: Incumbent likely:  France, Germany, Italy

Adtran 280x207Gary Bolton says they are first to higher speeds than vectoring. They call their system "frequency division vectoring." They claim,FDV will "double the vectored VDSL2 rate to deliver 200 – 300Mbps service rates and extend the service reach up to 40% further. I'm waiting to hear from them with more technical details. 

An obvious way to do this is to use G.vector FDD line codes in lower frequencies and TDD line codes in higher. Qualcomm and Microtek have LTE chips that combine TD & FD. I don't know what it would take to do the same in DSL or whether that's Adtran's approach. 

Details to come. Here's Adtran's pr


ADTRAN Shatters Broadband Barriers with Frequency Division Vectoring

Industry First: Breakthrough technology enables carriers to significantly broaden addressable market by doubling premium broadband speeds and extending service reach

HUNTSVILLE, Ala.--(BUSINESS WIRE)--Aug. 14, 2014-- ADTRAN®, Inc. (NASDAQ:ADTN), a leading provider of next-generation networking solutions, today announced an industry first that will eliminate several key barriers service providers face when expanding broadband service deployments. Frequency Division Vectoring (FDV) enhances the capabilities of both and VDSL2 vectoring by enabling them to better coexist by working in tandem across a single subscriber line in the service provider’s network. This new patent-pending technology enables service providers to take immediate advantage of the maximum performance without the expense of transitioning an entire subscriber base from VDSL2 to technology. Preserving investments in Fiber-to-the-Cabinet (FTTC) infrastructure, FDV doubles data rates and increases the reach of intermediate-rate services – between 100 Mbps to 1 Gbps – allowing the delivery of cost-effective premium broadband to 80% more subscribers.

“While and VDSL2 have always been seen as complementary technologies, the limitations of have been exposed when forced to operate in a VDSL2-compatible mode at higher rates,” said Jeff Heynen, principal analyst, broadband access and pay TV, Infonetics. “As service providers look to build out their adoption strategies, ADTRAN’s FDV technology has a key performance impact by allowing and vectored VDSL2 technologies to work in concert to boost performance. Service providers can now maximize a broader market opportunity without wasting unused bandwidth in their networks or prematurely forcing subscribers served by 100Mbps VDSL2 to move to”

FDV expands the addressable market for by broadening its applicability from Fiber-to-the-Building (FTTB) and Fiber-to-the-distribution points (FTTdp) out to existing street cabinet sites. This allows service providers to fortify recent cabinet investments while mitigating the operational challenges that currently exist regarding providing power to new FTTdp deployments. FDV strengthens the value proposition of by substantially improving deployment economics and enabling faster service time to market for game-changing broadband services rates.

“ADTRAN is the trusted technology partner for service providers around the world because we enable them to address real-world pain points in their network deployments. Frequency Division Vectoring is the latest example of breakthrough solutions we bring to our customers,” said Dr. Kevin Schneider, chief technology officer, ADTRAN. “FDV allows service providers to expand the capacity of their Fiber-to-the-Cabinet architecture to Fiber-to-the-Distribution Point levels without a deeper investment into their fiber infrastructure. This will enable service providers to cost-effectively accelerate premium broadband services for their entire subscriber base.”


FDV can be used to double the vectored VDSL2 rate to deliver 200 – 300Mbps service rates and extend the service reach up to 40% further. It takes advantage of the shorter copper loops that are too short for VDSL2 vectoring technology to use to any meaningful effect, and are too long for technology to leverage. This is generally 200 – 400 meter copper loops. These shorter copper loops extended from more deeply deployed street cabinets are common in throughout Central Europe and makes a cabinet sitting in “no man’s land” a means to deliver premium broadband services. Ultimately, FDV cleverly combines VDSL2 and to produce an improved performance. A performance that is near that of full spectrum, but is not handicapped by having to vacate the lower frequencies reserved for the previously deployed VDSL2 services. This allows technology to be deployed in existing FTTCab installations rather than to-be-constructed-FTTdp-installations by removing the 80% – 90% performance tax levied by existing VDSL2 services. - See more at: