Sub-loop unbundling

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In the telephony business, sub-loop unbundling (SLU) is a type of unbundled access whereby a sub-section of the local loop is unbundled. In practice this often means the competitor placing a small street cabinet with a DSLAM, next to a telco local copper aggregation cabinet or serving area interface and using a "tie cable" to connect to the last part of the local loop into customers' homes. Lyddington in Rutland was the first example of SLU in the UK when local provider Rutland Telecom unbundled the cabinet to offer VDSL broadband.