ADSL transmission equipment vendors use either frequency division multiplexing or echo cancellation to achieve this huge gain in throughput.
ADSL transmission equipment vendors use either frequency division multiplexing or echo cancellation to achieve this huge gain in throughput.
ADSL传输设备供应商不是利用频分多路复用，就是利用回波消除，以获得吞吐量有大幅度的提高。