Abstract: The system to pre-qualify copper subscriber loops for high bandwidth access service determines electrical characteristics of a subscriber line served by a central office switch from a location remote from said subscriber line absent a direct metallic connection exclusively to said subscriber line. This is accomplished where the subscriber line has subscriber equipment connected thereto at an end distant from said central office switch by establishing a communication connection through the central office switch between the service provider and the subscriber equipment connected to said subscriber line. In response to the establishment of this communication connection, electrical signals, comprising voice signals, are applied to the subscriber line to enable the service provider to determine the electrical characteristics of the subscriber line by analyzing the received electrical signals.

Abstract: A line termination unit which supports Integrated Services Digital Network (ISDN) and high speed data (HSD) services such as asymmetric digital subscriber loop (ADSL) or XDSL services to a subcriber over a common two-wire subscriber line. The line termination unit has a line termination circuit that connects to the subscriber line and provides ISDN signals to the line. The line support circuit receives incoming ISDN and HSD signals from the line and transmits outgoing ISDN and HSD signals to the line. The received incoming analog signals are separated into first (ISDN information) signals and second (HSD information) signals. The first signals are converted into third digital signals having a format used for ISDN signals by an associated central office and transmitting the third digital signals to the central office.

Abstract: The system to pre-qualify copper subscriber loops for high bandwidth access service determines electrical characteristics of a subscriber line served by a central office switch from a location remote from said subscriber line absent a direct metallic connection exclusively to said subscriber line. This is accomplished where the subscriber line has subscriber equipment connected thereto at an end distant from said central office switch by establishing a communication connection through the central office switch between the service provider and the subscriber equipment connected to said subscriber line. In response to the establishment of this communication connection, electrical signals, comprising subscriber or network generated tone signals, are applied to the subscriber line to enable the service provider to determine the electrical characteristics of the subscriber line by analyzing the received tone signals.

Abstract: A method that uses a test system at one end of a communication link to test the communication link for high speed service by coupling the test system to the communication link, placing a telephonic call to telephonic equipment located at an other end of the communication link and testing the communication link with the test system after the call has been terminated at the telephonic equipment.