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http://micronassociates.net/hi-TECH/2012/10/28/bt-boosts-fibre-to-the-home-broadband-speed-to-160mbps/
micron associates technology blog
BT Retail has boosted the speed of its top-of-the-range BT Infinity broadband package from 100Mbps to 160Mbps.BT Infinity 160Mb is a fibre-to-the-premises (FTTH) broadband service, and is currently only available from a limited number of exchanges, Micron Associates researched.
Most of BT’s fibre deployments are fibre-to-the-cabinet (FTTC), meaning that fibre optic cables are laid to street cabinets, and then traditional copper cables are used to connect homes and businesses to the street cabinets. This “last mile” copper connection can reduce broadband speeds significantly.
FTTH continues the fibre link from the street cabinets to the premises, which is a much more expensive option but massively improves connection speeds.

micron associates technology blog