Phone companies looking for a cheap way to increase broadband speeds are turning away from fiber optics and towards advanced forms of DSL that don’t bring cost objections from shareholders.

Whether your provider is AT&T or an ISP in Europe or Australia, financial pressure to improve broadband on the cheap is fueling research to wring the last kilobit out of decades-old copper phone wiring.

Alcatel-Lucent suggests VDSL2 Vectoring is one such technology that can enable download speeds up to 100Mbps using noise-cancelling technology to suppress interference.

But the advice doesn’t impress fiber optic fans who suggest any reliance on deteriorating copper phone lines simply postpones an inevitable fiber upgrade that could come at a higher cost down the road.

VDSL2 Vectoring and G.Fast are only as good as the copper wiring that extends to each customer. Up to 45 percent of North American wire pairs are in some state of disrepair.

Vectoring has been described as “pixie dust” by Australia’s former Communications Minister Stephen Conroy. Conroy was overseeing Australia’s switch to fiber service as part of the National Broadband Network. But a change in government has scrapped those plans in favor of a cheaper fiber to the neighborhood broadband upgrade advocated by the new Communications Minister Malcolm Turnbull that resembles AT&T’s U-verse.

“Malcolm can sprinkle pixie dust around and call it vectoring and he can do all that sort of stuff but he cannot guarantee upload speeds,” Conroy told Turnbull.

As with all forms of DSL, speed guarantees are extremely difficult to provide because the technology only performs as well as the copper wiring that connects a neighborhood fiber node to a customer’s home or office. Upload speeds are, in practical terms, significantly slower than download speeds with VDSL2. Turnbull expected download and upload speeds on Australia’s VDSL2 network to be around a ratio of 4:1, which means a customer who has a download speed of 25Mbps per second would receive an upload speed of around 6Mbps.

In the lab, VDSL2 Vectoring delivers promising results, with speeds as high as 100Mbps on the download side. DSL advocates are excited about plans to boost those speeds much higher, as much as 1,000Mbps, using G.Fast technology now under development and expected in 2015. VDSL2 Vectoring and G.Fast both require operators to minimize copper line lengths for best results. Unfortunately, dilapidated copper networks won’t work well regardless of the line length, and with many telephone companies cutting back upkeep budgets for the dwindling number of customers still using landlines, an estimated 15-45 percent of all line pairs are now in some state of disrepair.

Assuming lab-like conditions, G.Fast can deliver 500Mbps over copper lines less than 100 meters long and 200Mbps over lines between 100 and 200 meters in length.

G.Fast also allows for closer symmetrical speeds, so upload rates can come close or match download speeds.

This cabinet houses the connection between a fiber optic cable and copper phone wiring.

Providers prefer the copper-fiber approach primarily for cost reasons. There are estimates deploying a G.Fast-capable VDSL service to a home would cost around 70 percent less than fiber to the home service. Workers would not need to enter customer homes either, offering less-costly self-install options.

Telekom Austria and Swisscom are among providers committed to launching the technology. Both countries are mountainous and have many rural areas to serve. Fiber rich providers are also looking at the technology for rural customers too costly or too remote to service with fiber.

Critics question the real world performance of both VDSL2 Vectoring and G.Fast on compromised copper landline networks. Decades of repairs, deteriorating insulation, corroded wires, water ingress, and RF interference can all conspire to deliver a fraction of promised speeds.

Many critics also point to the required aggressive deployment of fiber/VDSL cabinets — unsightly and occasionally loud “lawn refrigerators” that sit either in the right of way in front of homes or hang from nearby utility poles. To get the fastest possible speeds, one cabinet may be needed for every four or five homes, depending on lot size. Australia’s VDSL network, without Vectoring or G.Fast requires at least 70,000 cabinets, each powered by the electric grid and temporary backup batteries that keep services running for 1-2 hours in the event of a power failure. The batteries need to be decommissioned periodically and, in some instances, have caused explosions.

The costs of electric consumption, backup batteries, infrastructure, and maintenance of copper lines must be a part of the cost equation before dismissing fiber to the home as too expensive.

While most rural telephone companies are selling customers 1-3Mbps copper-delivered DSL service, Alcatel Lucent has announced the commercial availability of VDSL 2 Vectoring, a new way of delivering up to 100Mbps over the copper wire telephone network most rural North Americans still depend on for telecommunications service.

VDSL2 combines a fiber-copper hybrid network similar to Bell’s Fibe or AT&T’s U-verse, with interference-cancelling technology called “vectoring” to deliver speeds much closer to the 100Mbps theoretical limit of current DSL technology.

“Alcatel-Lucent’s plan to make VDSL2 vectoring commercially available is very timely,” said Rob Gallagher, Principal Analyst, Head of Broadband & TV Research, Informa.  “VDSL2 Vectoring promises to bring speeds of 100Mbps and beyond to advanced copper/fiber hybrid networks and make super fast broadband speeds available to many more people, much faster than many in the industry had thought possible.”

A new way to boost copper speeds even faster.

Different flavors of DSL are currently in use around North America and beyond.  The most basic form, ADSL, also happens to be the most commonplace among phone companies offering basic broadband service.  For customers up to 12,000 feet away from a phone company central office, DSL delivers speeds usually at 1Mbps or faster.  Customers enjoying the fastest speeds must live much closer to the phone company facilities.  The further away you live, the slower your broadband speed.  In rural areas, consumers can live further away than the maximum distance of the central office, which means no DSL service for those subscribers.

A combination of signal loss and interference, called “crosstalk,” from adjacent copper wire pairs are both the enemies of DSL broadband, because they can drastically reduce speeds.

Telephone companies can address this problem by building new satellite central offices located halfway between customers and their primary facilities.  These offices, usually connected by fiber, can successfully reduce the amount of copper wire between the customer and the company, boosting speeds.  Many phone companies also deploy DSL extensions called D-SLAMs, which can be attached to a phone pole or enclosed in a metal box by the roadside.  A fiber cable connects the D-SLAM back to the phone company, while existing copper phone wires go back to individual subscribers.

More modern forms of DSL: ADSL2, ADSL2+, and VDSL, share some of those concepts.  The key is cutting as much copper wire out of the network as possible, replacing it with fiber optic cable which does not suffer signal loss or interference in the same way.

Many European and Pacific broadband networks rely on ADSL2/2+, which can usually deliver reliable speeds in the 20Mbps range.  VDSL networks offer even more bandwidth, and are the basis of U-verse and Fibe, which split up broadband, phone service, and television on the same cable.  When customers demand even faster speeds, phone companies can “bond” several individual DSL connections together to deliver faster speeds.  Some traditional ADSL providers do that today for their customers, especially in areas where low speeds prevail.

An argument the phone company will love.

Alcatel Lucent says VDSL2 with Vectoring is the next best thing to fiber to the home, because it is cheaper to deploy with fewer headaches from local authorities when streets and yards are dug up for fiber cable replacements.  It also meets the growing speed needs of average consumers.  Alcatel Lucent predicts the minimum speed North Americans will need to support the next generation of online video is 50Mbps, more than 10 times the speed phone companies like Verizon, AT&T, Frontier, and CenturyLink provide over their traditional DSL networks, especially in rural and suburban areas.

Vectoring can deliver results for phone companies with aging copper wire infrastructure, more prone to crosstalk and other signal anomalies.  Alcatel Lucent compares vectoring with noise-cancellation headphones.  By sampling the current noise conditions on copper cable networks, vectoring can suppress the impact of the interference, boosting speeds and delivering more reliable results.

With technologies like VDSL2 with Vectoring promising speeds far faster than what rural North Americans currently enjoy, the Federal Communications Commission may want to re-evaluate its national minimum speed standard for broadband — 3-4Mbps — found in its National Broadband Plan.  Alcatel Lucent promises they can do much better.

[flv width=”640″ height=”324″]http://www.phillipdampier.com/video/Alcatel Lucent VDSL2.flv[/flv]

Alcatel Lucent produced this video to promote its new VDSL2 with Vectoring technology.  The video targets cost-conscious phone companies who are being pressured to deliver faster service, but don’t want to spend the money on a fiber to the home network.  (6 minutes)

AT&T’s hybrid fiber-copper wire U-verse system added its 2,000,000th customer today and has announced a new speed tier in three of the company’s markets: Austin and San Antonio in Texas and St. Louis, Missouri.

The new High Speed Internet Max Turbo plan signals two things about AT&T’s broadband service — it can squeeze a bit more speed out of its more advanced VDSL network and it’s running out of clever names for its premium speed tiers.  The new plan is capable of achieving up to 24Mbps downstream and 3Mbps upstream, which is still not enough to compete with Time Warner Cable and Charter Cable’s DOCSIS 3 cable modem technology, but could be enough for many consumers.  The new plan is priced at $65 a month for residential customers who also receive other AT&T services, and $95 a month for business customers.  Many small business customers choose DSL service over cable modem technology because of installation costs, which can be prohibitive if an office park is not already wired for cable service.

AT&T added one million new customers in 2009 across 22 states where it provides service.  U-verse is still a work in progress in many areas where AT&T is slowly upgrading its facilities to deliver service. U-verse competes primarily with cable televisi0n, using a “bundled service” approach that tries to sign up customers for a complete line of telecommunications products.

Besides the alternative cable television service AT&T provides, more than 90% of customers also take U-verse’s broadband service.  It’s a major improvement over AT&T’s traditional DSL service, which is much slower and less reliable in providing promised speeds.

A U-verse installer wires up a new customer's home for service

AT&T counts these milestones for 2009:

• Launched 13 U-verse TV apps, bringing the total number of TV apps to 21 and giving U-verse TV customers control and interactivity with their favorite content. Two of the most recent app additions include Multiview, which lets you watch up to four channels at one time on your TV screen; and Santa Tracker, which lets families visit the North Pole to play holiday games, listen to sing-a-longs, follow Santa around the globe on Christmas Eve and more.
• Added more than 25 High Definition (HD) channels, bringing the U-verse TV HD channel lineup to more than 110 HD channels in every U-verse TV market. AT&T claims U-verse offers more HD channels than major cable providers in every U-verse TV market.
• Enhanced the company’s Digital Video Recorder to include Mobile Remote Access for the iPhone, an app that allows you to schedule and manage DVR recordings and search U-verse TV program listings from your iPhone. AT&T also added the capability to schedule and delete recordings from any U-verse connected TV in the home.
• Improved speeds on its broadband service by launching Max Turbo. AT&T also upgraded U-verse High Speed Internet Max customers by increasing speeds from up to 10 Mbps to up to 12 Mbps — a 20 percent speed increase at no extra charge.
• Expanded U-verse availability in the Southeast region. U-verse TV is now available in all 22 states of AT&T’s traditional footprint, and the advanced fiber network passes more than 20 million living units.
• Ramped U-verse Voice availability. U-verse Voice is now available in all 120 markets that offer U-verse TV, giving consumers another option for their home phone services and more quad-play integrated features.