Seven winners of Connect America Funding, including some of the largest U.S. carriers, are exploring DSL Rings technology developed by Genesis Technical Systems as a means of boosting the bandwidth of installed copper telephone wiring. Genesis has spearheaded the creation of an industry group, to be known as the Residential Access Carrier Consortium, in support of DSL Rings technology.
“The idea behind [the consortium] was to get economies of scale,” said Genesis CEO Peter Khoury in an interview with Telecompetitor.
Genesis announced this week that Cincinnati Bell achieved home broadband speeds of up to 200 Mbps symmetrically using the DSL Rings technology. According to Khoury, other companies looking at the technology include AT&T, CenturyLink, Verizon and Windstream “to name a few.”
The speeds that carriers will actually be able to provide individual customers using DSL Rings will depend on a variety of factors, but even for customers in rural areas with long copper spans to the central office, Genesis expects to be able to deliver speeds of 20 Mbps downstream and 4 Mbps upstream.
They use a process called bonding. You can read the Telecompetitor article for the description – although it sounds like the name says it all – they bind the copper/fiber lines together for better throughput. Here’s a little bit on the numbers…
More distant customers will be served using ADSL 2+ while closer customers will be served using VDSL, Cooke explained. According to Cook, ADSL2+ can support 15 Mbps per pair downstream over a distance of two kilometers. Multiplying that by 24 pair yields total bandwidth of 360 Mbps for a small group of homes to share, while total upstream bandwidth would be in the range of 24 Mbps to 48 Mbps.
The upshot, Cooke said, is that “the telco could sell services to each home at 20 Mbps downstream and 4 Mbps upstream and whenever bandwidth is available, you can burst up to 100 Mbps [downstream].”
Customers close enough to the central office to be served using VDSL2 might be able to burst up to 200 Mbps downstream when bandwidth was available, Cooke said.
Sounds like a great innovation. There are two factors that I think might interfere with speeds in rural areas – distance and multiple customers. Distance will slow down speeds and so will shared connections. So if you live in an area where your connection slows down once kids get home from school, you understand the issue. The originating speeds, however, are higher so there should be some improvement.
The definition of broadband for sake of CAF II funding is 10 Mbps down and 1 Mbps up (10/1). So these speeds will be sufficient for those requirements. The definition of broadband (or speed goal) in Minnesota is 25/3 by 2022 and 100/20 by 20126. It sounds like this solution won’t meet those requirements.