Telstra has finished its “DSL extender” trial and is now allowing the equipment to be used in its live copper phone network. Telstra announced a trial of the technology back in January, saying it would allow DSL to be connected to people who were up to 20KM from a central exchange.
DSL Extenders work by splitting an existing copper phone line into eight separate ADSL lines using a tiny, ruggedised remote DSLAM. The link back to the exchange uses 2.3Mbit/s G.SHDSL (Single-pair high-speed DSL). This 2.3Mbit/s speed is split up among the eight users that are connected to the micro-DSLAM. The link from the micro-DSLAM to customers’ homes is regular ADSL1, which suggests a maximum 1.5Mbit/s line speed. Telstra has confirmed that it will not be able to offer higher-speed ADSL2 or 2+ through the micro DSLAMs.