METHOD AND APPARATUS FOR COMBINING VOICE LINE CARD AND XDSL LINE CARD FUNCTIONS

摘要

An integrated line card for providing an analog termination for both POTS and xDSL signals that represent the appropriate impedances at xDSL frequencies for the xDSL signals and appropriate impedances at POTS frequencies for POTS signals. The line card comprises a front end for coupling combined POTS and xDSL transceiver circuits to a telephone line at a single termination and an impedance generator (58) responsive to the frequency range of the POTS and the xDSL circuits for generating the appropriate impedances on the line at xDSL frequencies for xDSL signals and the appropriate impedances at POTS frequencies for POTS signals, such that the signals are coupled to the card without the use of a splitter. Preferably, the xDSL circuits and the POTS circuits share a common driver (52) for driving signals onto the loop.