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In Cisco Emergency Responder, PSAP callback could not reach the original emergency call extension

Core Issue

Cisco Emergency Responder caches a mapping between the caller's true extension and the Emergency Location Identification Number (ELIN) you define for an Emergency Response Location (ERL). If more calls get made than the number of ELINs you define for an ERL, Cisco Emergency Responder must re-use these numbers, and it overwrites the original caller's extension.

Resolution

You can view the call history to determine the extension of the original caller.

Refer to the What Happens When an Emergency Call Is Made section of Planning for Cisco Emergency Responder.

If this does not address the problem, check the configuration of the Public Safety Answering Point (PSAP) callback route point in Cisco CallManager and Cisco Emergency Responder. To resolve this issue, refer to these documents:

For more details about resolving Cisco Emergency Responder issues, refer to these documents:

 

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