When a PSAP receives a call from a cellular telephone in reference to an emergent event, the speed and quality of the response may be improved by the cellular service provider's provision to the PSAP of information that includes the geographic location of the caller's phone. In a typical scenario, in which the call is from a GPS-equipped phone, the GPS coordinates of the phone may be echoed back to the PSAP in response to a specialized open “ping” request from the service provider. Of particular advantage to this approach is that GPS ping requests typically work regardless of whether a call is in progress, as long as the phone is turned on.