Emergency Call Routing Function. Receives location information (civic address or geo‐coordinate) as input and uses it to
provide a URI used to route an emergency call to the appropriate PSAP for the caller's location. Depending on the
identity and credentials of the entity requesting the routing information, the response may identify the PSAP, or an
ESRP that acts on behalf of the PSAP to provide final routing to the PSAP. The same database used to route a call to the
correct PSAP may also be used to subsequently route the call to the correct responder, for example, to support selective
transfer capabilities.