ADSL transceiver unit central office (ATU-C)
The ATU-C unit, the" ADSL Transceiver UnitCentral Office End", is located in the local exchange and forms an end point of an ADSL connection. The counterpart to the ATU-C unit is the ATU-R unit, "ADSL Transceiver Unit RemoteTerminal End", which is located at the end customer.