ESRK stands for Emergency Service Routing Key. Which statement about ESRK is true?

ESRK stands for Emergency Service Routing Key. Which statement about ESRK is true?

• A. Emergency Service Routing Digit
• B. Used to route a 911 call and retrieve associated ALI data (not tower or sector specific)
• C. Phase 2 location delivery
• D. Enhanced 911 data delivery

Answer: (B)

ESRK is a routing key used in 9-1-1 systems to direct a call to the correct PSAP and to fetch the caller’s ALI (Automatic Location Identification) data. The essence is that this key enables both proper routing and the retrieval of the associated subscriber information needed by the PSAP, independent of which cell tower or sector handled the call. That’s why the statement describing ESRK as used to route a 911 call and retrieve the ALI data best fits. It isn’t simply about a digit, Phase 2 location delivery, or delivering E911 data by itself—the strength of ESRK lies in linking the call to the right PSAP and the correct ALI record.

ESRK is a routing key used in 9-1-1 systems to direct a call to the correct PSAP and to fetch the caller’s ALI (Automatic Location Identification) data. The essence is that this key enables both proper routing and the retrieval of the associated subscriber information needed by the PSAP, independent of which cell tower or sector handled the call. That’s why the statement describing ESRK as used to route a 911 call and retrieve the ALI data best fits. It isn’t simply about a digit, Phase 2 location delivery, or delivering E911 data by itself—the strength of ESRK lies in linking the call to the right PSAP and the correct ALI record.