aries 2 pair bond12 bonded lines of 35b VDSL should be able to deliver 2 gig downstream ~400 meters. That's comparable to the most common backhaul, 2.4 gig GPON. Telcos are confident few will use the high speeds simultaneously so the high over-subscription is realistic. Upstream on the older DSLs is lower, so the upstream will probably be limited.

Kurt Raaflaub says Adtran has trial units at customers. As far as I know, this is the first public description of bonded 35b and I hadn't anticipated this possible use. Deutsche Telekom says 35b will be ready for deployment the second half of 2018.

Telcos will often have fiber within 500 meters of apartment buildings. They will almost always have a dozen unused pairs, especially as more customers drop landline voice. The basement DSLAM can then deliver a gig to anyone who wants it. 

AT&T CEO Stephenson sees the fiber they spent $billions on a few years ago as strategic. It was built to protect the business market, but Randall emphasizes the fiber is within a thousand feet of an enormous number of apartment buildings. Use the copper they already have for backhaul and put a DSLAM in the basement. If it works in the field as proposed, it will be a very cheap way to deliver a gigabit. 

In the right places, the saving in time and money should be large.

Raaflaub is speaking at Broadband Forum Access Summit

 Here's the blurb

Fiber to the Distribution Point Minus the Fiber

Re-using existing copper pairs for backhauling can dramatically reduce the cost and time to market for deployments. In this presentation, we discuss the results of our comprehensive studies on the requirements for backhauling capacity, and show that these can be realized over bonded copper in nearly all cases. We also prove that with the 2nd generation of chipsets along with new bonded 35b CPE chipsets it is actually becoming practical to enable Gigabit Services without the need for laying fiber at all. Positive results from customer lab trials round up this presentation.

11:20 - 11:35

Fiber to the Distribution Point Minus the Fiber