Originally posted by Hawklore
I wonder why???
Well like Wolfala posted...
They punched up the wrong freq, ATC had no contact and in this post September 11th world they assume the worst.
Normal procedures in this case would be go back to your last assigned frequency but depending on where they were...for instance over one of the North Atlantic tracks talking to one of the control centers there, they might not be able to hear the previous controllers on that old frequency because of the location of the ground communication stations.
Basically they dialed in 123.45 instead of 123.54.