It used to be that calling 9-1-1 was as simple as dialing 9-1-1. But with the emergence of different technologies, cell phone and VoIP, there are some nuances to understand when calling from each. An easy way to remember what to tell the 9-1-1 operator is to remember the Who What Where of 9-1-1.
Who are you
What is your emergency
Where is your emergency