spacer 2Telebyte Gfast Testing Guide 320

gfast map nov

Dark Green: 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 Pink: Smaller carriers in Germany, Norway, Finland, Japan

Light Green: Incumbent likely:  France, Germany, Italy

Telebyte is also ready with 35b vectored test equipment. You want to catch equipment problems in the lab because serious field trials cost millions. But how do you test the 300-page standard? Michael Breneisen's company chose to work closely with the Broadband Forum and their equipment is designed around the Forum's test suite. They've outfitted a lab at the University of New Hampshire which hosts the Forum's interoperability testing.

Breneisen tells me the most frequent problems in early equipment were in the stability of FEXT cancelation and noise protection. Once discovered, manufacturers corrected most of them. Looking forward, he believes the industry needs to be able to test sucessfully Interoperability between chipset vendors.

Field tests reveal even more. TNO's Rob van den Brink gave an outstanding presentation at last year's Ultra Broadband Forum. He offered surprising observations from DSL field results in the Netherlands. I always remain skeptical of company claims until we have results from 10,000 customers.

Here's the pr.

Telebyte Announces Release of Cable Farm Automation Switch

By  on January 18, 2016

Next-Gen Switch Designed Specifically for Automating and VDSL2 Vectoring Testing

Hauppauge, NY (PRWEB) January 18, 2016

Telebyte, a US-based global xDSL test equipment solution provider, today announced the release of the Model CFA-24 Transparent Cable Farm Automation Switch – the only switch on the market designed for testing the Broadband Forum’s ID-337 and TR-249.

The 24-channel, electrically neutral device allows up to twenty-four incoming cable farm lines to be switched to five different copper loop segments. Operating in a frequency band up to 212 MHz, the CFA-24’s superior performance and transparency facilitates lab-grade testing of VDSL2 Vectoring (including Profile 17a and Profile 35b) or devices where accuracy is extremely important.

The CFA-24 is the company’s first product designed for programmatic control of multiple copper loop segments. Line lengths and increments are set without re-cabling. The user makes connections once then switches loop segments in (or bypasses them) as needed through a web browser. Remote commands can be used to set line lengths for test automation. Additional features include Micro-Interruptions and support for Reverse Powering (

In keeping with the modular approach to most of Telebyte’s products, units may be added as testing requirements expand or budget becomes available. This allows customers to purchase an initial system and later extend the number of loop segments to as many as fifteen and/or expand the number of channels to as many as needed by purchasing additional units.

“Our customers were looking for a way to avoid connecting and disconnecting loop segments in their cable farms manually. They wanted to simply switch in or bypass segments programmatically,” said Michael Breneisen, President of Telebyte. “Customers reported dissatisfaction with other products that were repurposed for this type of testing so we decided to design a product from the ground up to meet both VDSL2 Vectoring and testing requirements. We are very pleased this release coincides with the high demand for ID-337 Certification testing and TR-249 testing.”

Finally, the CFA-24 may be used with Telebyte’s noise generators and injectors to add alien crosstalk, impulse, RFI and more for realistic testing

Telebyte Announces New Release of Universal Noise Generator

First commercially available Noise Generator to support ID-337 Certification testing

(PRWEB) January 14, 2016

Telebyte, the leader in test equipment, today announced the release of the Model 4902 Universal Noise Generator. The next-gen solution is the only commercially available noise generator on the market that is fully compliant with the Broadband Forum’s ID-337 Certification Test Plan.    

The solution builds upon its feature-rich predecessor, the popular Model 4901 which is already used around the world by most major service providers and equipment vendors. The modular design allows for expandable configurations from 2 to 24 noise outputs in portable or rack-mountable versions.

Telebyte includes user-friendly configuration software that allows the user to select and build a wide variety of complex impairment models that may impact deployments. These include background Gaussian noise, high frequency impulse noise (PEIN, SHINE), FM radio, Broadcast TV, Spark Plug Ignition noise, PLC noise, Reverse Power Feed noise and more. In addition, user-defined files in several formats (such as MATLAB. CSV and Excel) may be imported.

“Several major North American and European Service Providers are using Telebyte’s test gear to evaluate the performance technology,” said Michael Breneisen, President of Telebyte. “The equipment is in great demand. With our ability to meet this need we are now recognized as the established leader in the test equipment area.”



The Site for gfast 230 News

I’m still working through remarkable presentations from the Broadband Forum events. Michael Weissman, Bernd Hesse and team did a remarkable job choosing the speakers.

Deutsche Telecom: 35b Supervectoring Delayed to 2019
Broadcom is now over 3 years late. DT briefed German reporters after their financial call and revealed 35b was now delayed until 2019. 35b should deliver 200+ meg downloads 500-600 meters, a crucial tool for DT, which is losing share to cable. Cable now covers about 70% of Germany and is expanding. DT now only offers 50-100 megabit DSL while cable is often 400 megabits, going to a gigabit. 

The problem is software; the hardware is shipping and supposedly will work. DT says 35b is not ready to turn on. Broadcom in 2015 said 35b was in "production" in the press release below. Alcatel in early 2016 said to expect complete systems very soon. "35g is very similar to 17a so there should be little delay."

Broadcom's problems are leading major telcos and vendors to have a plan B, using Sckipio DT itself is planning extensive deployments in 2019, mostly in apartment buildings.

Gigabit 100 Meters - Unless the Wires are Lousy
Speeds are fine, "Unless there's a line problem." I've been reporting for three years that ~10% of lines have problems. In the chart by Rami Verbin of Sckipio, he finds goes ~130 meters on good lines. Poor lines have about half the reach. 

His chart roughly matches the reports from Swisscom, Belgacom, and England for both & vectored DSL. The 10% with problems can cause the majority of the line-related complaints to support. The angry customers drive up cost.

Rami's solution to reach the gigabit is bonding, supported on the Sckipio chips. Verbin made some additional points:

  • 4 gigabits is possible by bonding two decent 2 gigabit lines.
  • Even in a service from remote cabinets, ~25% are close enough to get a full gigabit."
  • cDTA and iDTA are practical ways to deliver much higher upstream by switching some bandwidth from downstream to upstream only when needed.
  • 35B will probably be similar but Deutsche Telecom doesn't expect to deploy until 2019.

AT&T Wants Coax 2-5 Gigabit Very Soon.
AT&T faces intense competition from cable, talking about 10 gigabits in both directions. (Cable will only be 1 gig down, ~100 meg up, until ~2021.) AT&T wants something to brag about as well.

AT&T gained millions of lines of coax as part of the DirecTV deal. Alcatel and Huawei are leading the development of G.mgfast. That uses 424 MHz, full duplex, to achieve ~2.5 gigabits in both directions. The reach on telco twisted pair is only about 30 meters. On coax, those speeds can probably extend far enough to service most apartment buildings. Using 848 MHz, speeds can reach 5 gigabits. The ITU standards group has been aiming for 2019-2020 for G.mgfast, too slow for AT&T's marketers. David Titus wants a high-speed standard for coax "early in 2018." He believes that is "doable."

Read more ...