Nokia Siemens Networks is demonstrating DSL with download speeds of 25 Mbps at a distance of up to 1,500 meters from the local exchange at Broadband World Forum in Paris this week. Such VDSL2 bonding technology has been called telco’s answer to DOCSIS 3.0.

A challenge faced by VDSL2 service providers is that available bandwidth drops dramatically the further a customer is from a DSLAM (the network device that connects the various DSL subscriber lines to the main high speed internet connection.) Bonding is a process by which several VDSL lines can be virtually combined to expand the reach of the VDSL2 network, increasing the access bandwidth for customers.

“Restricted reach has put limits on the business opportunity of VDSL2," said Eduard Scheiterer, head of broadband access at Nokia Siemens, in a statement. "By doubling the reach with minimum complexity in terms of upgrading, our technology demonstration shows carriers a potential to extend their VDSL2 offering to millions of new customers.”

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