Stronger than the Bat Signal

I have a very special signal I beam out into the cosmos when I'm dead tired. That signal can be picked up, far and near, by everyone who knows me. I don't mean to broadcast it; I wish I knew how to turn it off. My only thought is "I want to go to sleep," and yet the signal blares and my kindred respond.

Do you hear it? It's coming your way!

"Now would be a good time for you to pick up the phone and call me--with an enormous problem or deep melancholy, if possible--and talk to me for an hour or more."

I'll just be unplugging the phone and going to bed, now....