Default routing is used as predetermined method to direct calls to the appropriate PSAP in case of an ANI or Selective Router failure.

Default routing is used as predetermined method to direct calls to the appropriate PSAP in case of an ANI or Selective Router failure.

• A. It is used to balance load across PSAPs.
• B. It redirects calls to overflow locations during busy times.
• C. In case of an ANI or Selective Router failure, Default routing directs calls to the appropriate PSAP.
• D. It handles non-emergency calls only.

Answer: (C)

Default routing is the predefined fallback path used when the usual routing path from the caller’s ANI or the Selective Router isn’t available. It uses a preestablished mapping to send the emergency call to the correct PSAP, ensuring the right agency still receives the call even if the primary routing mechanism has failed. This emphasizes continuity of emergency response during failures, rather than distributing load, diverting to overflow during busy times, or handling only non-emergency calls.

Default routing is the predefined fallback path used when the usual routing path from the caller’s ANI or the Selective Router isn’t available. It uses a preestablished mapping to send the emergency call to the correct PSAP, ensuring the right agency still receives the call even if the primary routing mechanism has failed. This emphasizes continuity of emergency response during failures, rather than distributing load, diverting to overflow during busy times, or handling only non-emergency calls.