PRF (Policy-based Routing Function)

From NENA Knowledge Base

PRF (Policy-based Routing Function) is a functional component of an Emergency Service Routing Proxy that determines the next hop in the SIP signaling path using a Policy Routing Rule.

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-INF-011, NENA NG9-1-1 Policy Routing Rules Operations Guide
  • NENA-STA-010, NENA i3 Standard for Next Generation 9-1-1