In article >, Andy <q> wrote:

> Dan Abel said...

> > In many of the medical offices I've been to, the signs requesting that
> > cell phones be turned off are on the doors leading to the exam rooms,
> > not in the waiting room.
>
>
> Most cellphones can be directed to transfer incoming calls immediately to
> voice mail. I imagine that's hard for some folks who can't stand being out
> of touch for a moment.

AFAIK, cell phones only emit signals under three conditions:

1. When you turn them on
2. When you move from one cell to another (generally involves driving,
unless your medical facility is several miles long)
3. When you are talking

Cell phones do not emit signals just because they are turned on.