ESRN (Emergency Services Routing Number)

ESRN (Emergency Services Routing Number) is used by the Call Server/Routing Proxy to route an emergency call to the correct ESGW, and by the ESGW to select the desired path to the appropriate SR for the call.

NENA 03-503, NENA SS7 Guidelines for Wireline and VoIP Emergency Services Gateway Interconnection to 9-1-1 Selective Routers