This Recommendation contains a service-level profile, i.e., SIP/SDP interface description, between
two network operators (NNI signalling profile), where the two different network operators may
support different SIP/SDP profiles (i.e., they differ in terms of the SIP extensions, SIP information
elements and SDP lines which are supported). Transport-level profile, e.g., RTP, is described as necessary as the media are described in the service-level signalling.
NOTE 1 – Specification of the interworking between the SIP/SDP profile contained in this Recommendation
and the SIP/SDP profiles in each operator's network (i.e., the functions contained inside the interworking
entity/entities at the network boundary) is out of scope of this Recommendation.
For the protocol set 1 of the NGN NNI signalling profile, this Recommendation covers the
voiceband services such as VoIP (audio, text and so on), DTMF and T.38 fax.
NOTE 2 – Support for a mobility management interface is not supported in this version of this interface.
However, nomadicity of users between different networks is supported.
ITU-T Q.3401-2007 Referenced Document
ITU-T G.711-1988 PULSE CODE MODULATION (PCM) OF VOICE FREQUENCIES
ITU-T G.722-1988 7 kHz Audio-Coding within 64 kBit/s - General Aspects of Digital Transmission Systems; Terminal Equipments Study Group XV and XVIII; Covering Note May 30, 2003
ITU-T G.722.1-2005 Low-complexity coding at 24 and 32 kbit/s for hands-free operation in systems with low frame loss Study Group 16
ITU-T G.722.2-2003 Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB) (Study Group 16)
ITU-T G.729-1996 Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) - General Aspects of Digital Transmission Systems Study Group 15; 39 pp
ITU-T G.729.1-2006 G.729-based embedded variable bit-rate coder: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729 Study Group 16; Incorporated Amendment 1: 1/13/2007 and Amendment 2: 2/13/2007
ITU-T Q.1912.5-2004 Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control Protocol or ISDN User Part SERIES Q: SWITCHING AND SIGNALLING Specifications of signalling related to Bearer Independent Call Control (BICC) (Study Group 11)
ITU-T Q.761-1999 Signalling System No. 7 - ISDN User Part Functional Description - Series Q: Switching and Signalling - Specifications of Signalling System NO. 7 - ISDN User Part Study Group 11; 22 pp
ITU-T Q.762-1999 Signalling System No. 7 ISDN User Part general functions of messages and signals Study Group 11
ITU-T Q.763-1999 Signalling System No. 7 - ISDN User Part Formats and Codes - Series Q: Switching and Signalling - Specifications of Signalling System No. 7 - ISDN User Part (Study Group 11)
ITU-T Q.764-1999 Signalling System No. 7 - ISDN User Part Signalling Procedures - Series Q: Switching and Signalling Specifications of Signalling System No. 7 - ISDN User Part Study Group 11
ITU-T T.38-2005 Procedures for real-time Group 3 facsimile communication over IP networks Study Group 16
ITU-T Q.3401-2007 history
2007ITU-T Q.3401-2007 NGN NNI signalling profile (protocol set 1) Study Group 11