Michael Rigby-Jones wrote:

> Why can't the morse key be connected to a (very) simple tone
> generator, acoustically coupled to a telephone.  A matching tone
> decoder acoustically coupled to the telephones ear piece would do the
> receiving.
...
> A few $'s of parts maximum, and no legality problems connecting stuff
> to the telco.

  According to my discussions with the previous poster (I forget
whether on-list or off now), even acoustic couplers are required to be
type-approved.

  Also, it is more difficult to couple to "square" handsets!

  Well, that's what I was told!
--
  Cheers,
        Paul B.