How would a 999 call be routed via a GSM gateway?
Apologies for the late reply but am I missing something as I cannot understand how any emergency number would or could ever be routed via a GSM gateway?
As I understand it a GSM gateway can be used to terminate mobile calls (by passing conventional MNO/BT interconnects). Or as an access onnet for mobile calls to then call foreign numbers, like a two stage call.
So how would an emergency number ever be passed to a GSM Gateway?