"John Navas" wrote in message
...
POTS phone lines are very limited. IIRC from my work with those systems,
about 300-3600 Hz. Strictly human voice range, not meant for hi-fi.
Special
lines are still available for hi-fi use as audio STL's.

POTS lines are encoded at 64 Kbps, which is why V.90 modems work, and
which is sufficient for decent audio, albeit not "hi-fi".


POTS lines are not encoded at all. Hence "Plain Old Telephone Service" which
can be used with any telephone (ain't no decoders in a WE 500 deskset) that
uses a DC line.