Multiplexed codec for an ADSL system

摘要

An ADSL central office transmission system for transmitting downstream DMT signals to a plurality of remote ADSL transceiver is disclosed. The system includes a DMT digital signal transceiver that generates a time division multiplexed digital signal that includes a plurality of DMT signals to be sent on a plurality of ADSL lines. A digital to analog converter converts the time division multiplexed digital signal into a time division multiplexed analog signal that includes a plurality of analog DMT signals. The analog to digital converter has an output that outputs the time division multiplexed analog signal. A switch selectively connects the output of the digital to analog converter to each of a plurality of transmitters. The transmitters are configured to drive the plurality of ADSL lines. Thus, the plurality ADSL lines are driven by the plurality of analog DMT signals.