Enhanced 911 requires the addition of which component over basic 911?

Enhanced 911 (E911) is a system designed to provide more accurate and efficient emergency response services compared to basic 911 systems. A critical component of E911 is the ability to automatically translate the caller's address into an Emergency Service Number (ESN). This is crucial because the ESN helps route the call to the appropriate emergency service providers based on the location from which the call originates.

When a 911 call is made, the system identifies the caller’s location using automated means and then matches that information with a database to determine the precise emergency services that should respond. This level of localization and specificity provided by the ESN is what sets E911 apart from traditional 911 services, which may not provide such detailed geographic routing information.

In contrast to this key feature, the other options do not represent essential enhancements that directly improve the routing and response capabilities of the 911 system. A dedicated server, while it may support the infrastructure, is not a unique or defining requirement of E911. Similarly, while backup systems and increased call capacity are important for service reliability and handling a high volume of calls, they do not specifically address the enhanced location-based capabilities of E911. Thus, the translation of an address to an ESN stands out