The SBC acting as a P-CSCF is configurable using the emergencyCallHandlingMode parameter to either accept or reject an emergency call based on local policy. If rejecting the call, the SBC sends UE a 380 (Alternative Service) response.

The CLI syntax to set the emergencyCallHandlingMode parameter is shown below:

% set addressContext <addressContextName> zone <ZONE_NAME> sipTrunkGroup <TG_NAME> services emergencyCallHandlingMode <none|rejectWith380>

...where:

  • none = handle emergency calls
  • rejectWith380 = reject emergency calls with a 380 responses

For configuration details, refer to:

Additional references:

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