a simple network comprises of : xdsl service equipment located at a distribution center coupled to an aggregator separator system located at a dc ; agsep system at the dc is coupled , using a high - speed link , to another agsep system located at a remote site , which is coupled to subscriber equipment using drop cables . the agsep systems aggregate the xdsl signals originating at either dc xdsl equipment or subscriber equipment , are carried over the high - speed link . the agsep systems and separate the aggregated signals at either end to distribute the separated signal to the respective equipment .