What is the primary function of the selective router mentioned in emergency response systems?

The primary function of the selective router in emergency response systems is to route calls to the correct Public Safety Answering Point (PSAP). When someone dials an emergency number, the selective router plays a critical role in ensuring that the call is directed to the appropriate PSAP based on the geographic location of the caller. This capability is essential for a timely and effective response from emergency services, as it allows dispatchers to receive the call and send the relevant emergency responders, such as police, fire, or medical services, to the right location without delay.

By accurately directing calls, the selective router helps improve the efficiency and effectiveness of emergency responses, ultimately enhancing public safety. Other functions, such as managing costs or providing information about service outages, are important in their own right but do not directly relate to the core function of call routing as executed by the selective router.