This Standard defines the interfaces between a Telecommunication Service Provider (TSP) and a Law Enforcement Agency (LEA) to assist the LEA in conducting lawfully authorized electronic surveillance for Voice over Internet Protocol (VoIP) in Wireline Telecommunications Networks. Version 1 of T1.678 (T1.678-2004) provides support for Voice over Packet (VoP) services utilizing basic SIP call control and basic H.323 call control for IP. Version 2 of T1.678 (ATIS-1000678.v2.2006) adds support for supplementary services such as hold/retrieve, multi-party calls, and call transfer. Version 3 (ATIS-1000678.20xx) incorporates ATIS-1000678.a.v2.2007 (Supplement A to ATIS-1000678.v2.2006), ATIS-1000678.b.v2.2010 (Supplement B to ATIS-1000678.v2.2006), and provides clarifications, corrections, and enhancements. Version 3 also removes support for H.323 call control for IP. Upon publication, this Standard supersedes and replaces ATIS-1000678.v2.2006, ATIS-1000678.a.v2.2007, and ATIS-1000678.b.v2.2010.

This document provides the mechanisms to perform lawfully authorized electronic surveillance of VoIP subject to the appropriate legal and regulatory environment. It is not the intent of this document to imply or impact any pending Communications Assistance for Law Enforcement Act (CALEA) regulatory decisions related to VoIP.

NOTE – Annex A, ASN.1 Definitions, of this Standard has also been formatted as a separate plain text file and electronically packaged with this standard.