FCC Notice of Proposed Rule Making Issued 10/94. Ensures compatibility with E9‐1‐1 calling systems and is to be
implemented in phases:
PHASE 0 ‐ The delivery of a voice call from a wireless device to a PSAP.
PHASE .5 – Delivers the caller’s voice and call back number.
PHASE I ‐ Delivers the caller's voice, call back number, and cell site sector information.
PHASE II‐ Delivers Phase I info plus the latitude and longitude of the caller (x, y).