This Technical Report (TR) provides a profile and tests to verify the support of Emergency Telecommunications Service (ETS) on the Internet Protocol (IP) Network-to-Network Interconnection (NNI). The scope of this TR is limited to the minimum number of tests that are needed to verify the ETS requirements for voice services@ as specified in ATIS specifications that are relevant to IP Network-to-Network interconnections. Specifically@ the following are provided in this TR: i. Protocol profile for ETS testing. ii. ETS tests. iii. Mapping of tests to the requirement being verified. iv. Template for ETS information exchange between interconnecting service providers (Informative Appendix). This is a component of the family of ATIS Next Generation Carrier Interconnection (NG-CI) documents on guidelines addressing VoIP services Interconnection over IP-based links etworks and supports next generation service interoperability. This document is intended to be used together with [ATIS-1000038]@ [ATIS-1000039]@ [ATIS-1000040]@ [ATIS- 1000041] as the technical parameters@ protocol profile@ testing configuration@ and tests for basic voice services are not repeated in this TR. Purpose The purpose of these tests are to confirm appropriate implementation of the ETS requirements specified in ATIS documents that are relevant to IP Network-to-Network interconnections between two service providers. This involves tests to confirm appropriate implementation of the SIP Resource Priority Header (SIP RPH) according to the ETS requirements across the NNI and conformance with the respective protocol profiles. The purpose of these tests is to serve as the basis for developing detailed test cases and scripts to validate conformance to the ETS profile and ETS interoperability between interconnecting carriers@ including the protocols used (i.e.@ SIP RPH).