noun: When you call people, but none pick up, as if simulatenously all telecommunication services are disabled.
Can stretch over the course of an hour to over a day.
Jerry: I tried to call Melissa yesterday, she did not pick up. But as I was bored I decided to call Phillipp, Josef, Sandra, Yvonne and even my mother, but apparently today was dead phone syndrome!
Tom: I have that as well occassionally, ... but hey, you didn't try to call me!