On Thu, 14 Aug 2008 05:14:08 -0700, SMS
wrote:


Also I think with enough practice, one can learn to make touch-tone
sounds with one's mouth. I think there was a guy on tv who could do
that.

I saw that, but it's very difficult because each button generates a pair
of tones.

OTOH, you can pulse dial from a touch tone phone by pressing the
receiver hook the number of pulses for each digit. It's not as hard as
it sounds.

And certainly worth learning when locked in a dungeon.

There's a lot of leeway in the pulse rate and duty cycle. If
you've ever seen a phone in a public area with no dial or touch pad (to
keep people from making outgoing calls) there's a way around this
limitation.

Then too.