scope:

The scope of this Technical Report (TR) is the comparison of Session Initiation Protocol (SIP) profiles defined in the interface standards developed by ATIS and 3rd Generation Partnership Project (3GPP) as well as the specification developed by the National Emergency Numbering Association (NENA) relating to i3 for the external network interface. See references in Section 2.

Purpose

The purpose of this TR is to provide a side by side comparison of SIP INVITE profiles defined by ATIS, 3GPP, and NENA. These comparisons were used by the respective Standard Development Organizations (SDO)s to align profiles to promote interoperability within North America.