ATIS 0700003

This document defines the protocol requirements for the Lbis interface that supports the UTDOA positioning method for emergency calls. Because the Lbis interface is primarily an extension of the Lb interface to a remote PDE, the relevant Lb interface is also reviewed in detail. The node procedure associated with the transmission and reception of UTDOA messages is also defined in this document. This document shall be used in conjunction with the UTDOA Architecture and Functional Description document.