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Fast automatic restoration
Fast automatic restoration (FASTAR) is an automated fast response system developed and deployed by American Telephone & Telegraph (AT&T) in 1992 for the centralized restoration of its digital transport network.〔(Milestones in AT&T Network History )〕 FASTAR automatically reroutes circuits over a spare protection capacity when a fiber-optic cable failure is detected, hence increasing service availability and reducing the impact of the outages in the network. Similar in operation is real-time restoration (RTR), developed and deployed by MCI and used in the MCI network to minimize the effects of a fiber cut.〔(Real-Time Restoration )〕
== Restoration techniques ==
It is a recovery technique used in computer networks and telecommunication networks such as mesh optical networks, where the backup path (the alternate path that affected traffic takes after a failure condition) and backup channel are computed in real time after the occurrence of a failure. This technique can be broadly classified into two: centralized restoration and distributed restoration.〔(Path Routing in Mesh Optical Networks", by Eric Bouillet, Georgios Ellinas, Jean-Francois Labourdette, and Ramu Ramamurthy )〕
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