> Steve Davies writes:
> > You are misinformed about V.34/V.34+ on two-wire. They are full-duplex.
>
> They are half-duplex.
>
> Just like any other analog modems, they can send information in only
> one direction at a time, which is the very definition of half duplex.
V.34 modems use echo-cancellation techniques to allow both sides to
transmit at the same time whilst listening to the remote modem. So bits
can be flowing in both directions at the same time. This is the very
definition of full duplex.
Steve