Duplex Stereo over the phone? (littlle OT)

[Barry L Klein]

Wonder if anyone here has any experience with this....

What would be the least expensive method to achieve stereo duplex audio
over a phone line?
I want to be able to have a typical interactive conversation in stereo at
both ends using a single line.  Would you go with a laptop at each end and
some software program, or is there some other way?

Barry

barry.l.klein at wdc.com