BT Infinity

BT Infinity is a broadband service in the United Kingdom provided by BT Consumer, the consumer sales arm of the BT Group. The underlying network is fibre-to-the-cabinet (FTTC), which uses optical fibre for all except the final few hundred metres to the consumer, and delivers claimed download speeds of "up to 76 Mbit/s" and upload speeds of "up to 19 Mbit/s" depending on package selected. The fibre terminates in a new roadside cabinet containing a DSLAM, from where the final connection to the customer uses VDSL2 technology.

Ofcom data gathered in November 2014 indicated that only 1% of 76 Mbit/s and 15% of 38 Mbit/s customers received the advertised speed.

Following a technical trial involving 50 homes in Foxhall, Ipswich, in January 2009, and operational pilots at the Muswell Hill, Whitchurch and Glasgow Halfway telephone exchanges, the service was launched commercially on 25 January 2010. When it was announced, BT expected 4 million customers for the service by the end of the year. Infinity forms part of BT's £1.5bn plan to make superfast broadband available to 40% of the UK by the summer of 2012, using FTTC and FTTP services. Previously, the only major provider of domestic super fast broadband in the UK was Virgin Media's hybrid fibre-coaxial service. It should be noted that neither Virgin Media nor BT's 'up-to 76MBit/s' Infinity actually use optical fibre to supply super fast broadband to the home, but rather still rely on copper, which can be sensitive to electromagnetic interference. BT Infinity does however have a 'fibre to the home' product available.

The fibre infrastructure is installed and maintained by Openreach, and is available for use by non-BT ISPs either directly from Openreach, or from BT Wholesale as part of the WBC product family.

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