All Internet Phone services providers are supposed to be setup so that they support 911 (or E-911) services in case of
emergency. Normally you see, with a traditional phone line, if you call 911, they can tell where you are calling from. But
this same ability does not exist with a VOIP phone, so you need to register your VOIP phone with the service so that if you
call 911 from your VOIP phone, the emergency responders will know where to go.