from
The Free On-line Dictionary of Computing (8 July 2008)
asymmetrical modulation
<communications> A scheme to maximise use of a communications
line by giving a larger share of the {bandwidth} to the
{modem} at the end which is transmitting the most information.
Only one end of the connection has full bandwidth, the other
has only a fraction of the bandwidth. Normally, which end
gets the full bandwidth is chosen dynamically.
Asymmetrical modulation was made famous by the {HST} mode of
the early high-speed modems from {US Robotics}.
(1998-03-13)