"The Eternal Squire" wrote in message ...
garigue,

Any intelligent civilization would have either evolved heliography or
telegraphy
for specific needs. A magic-based civilization would have evolved
heliography,
a technology-based civilization would have evolved telegraphy.

You could either:
1) Think of it as a SETI exercise. CW would carry far better over
interstellar distance
on microwave frequencies than voice, RTTY, or image.

You don't want the aliens to think we're idiots, do you?