I used pagers a lot in my days looking after TV transmitters.
There were actually quite a few "false alarms".
With the plain "alarm" type, it was just a matter of ringing work, who would verify if it was a real callout, but the alphanumeric ones could be quite hilarious.
One day I received one saying, "Amanda on tonight's flight, wear your red Jocks".
I could just imagine Amanda waiting at the airport to be picked up, with her wrath rising moment by moment towards the correct addressee, who meantime, was trying to decipher some gobbledygook about TV transmitters!