Routing ESN (Emergency Service Number)

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Routing ESN (Emergency Service Number) is the 3-5 position Emergency Service Number (ESN) used by a selective router to selectively route a 9-1-1 call and for switch-based selective transfer features. In cases where Routing ESNs are not used, the routing ESN equals the Administrative ESN. (Refer to Administrative ESN)

Relevant NENA Documents
Note: To find and download the document, copy the document number (like NENA-STA-010) from below and search the NENA Standards and Documents page.

NENA 03-008, NENA Standard for E9-1-1 Default Assignment and Call Routing Functions

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