ETSI EG 202 320 V1.2.1 (2005-10)

Intellectual Property Rights
Foreword
Executive summary
1 Scope
2 References
3 Definitions and abbreviations
   3.1 Definitions
   3.2 Abbreviations
4 General
   4.1 Basic considerations
   4.2 Additional facilities
   4.3 Special provisions
   4.4 Current situation
5 The DUST concept
6 User requirements
   6.1 General considerations
   6.2 Technical considerations
   6.3 User requirements from Legislation
7 Stage 1 outline
   7.1 Introduction
   7.2 Definition
   7.3 Description
   7.4 Overall behaviour
8 Stage 2 outline
9 Host environments
   9.1 Introduction
   9.2 Requirements on host environments
   9.3 Regulated environments
   9.4 Target implementation
   9.5 Terminals supporting DUST
   9.6 DUST interoperability targets
   9.7 Generic Firewall and NAT traversal
10 Numbering, naming and addressing
   10.1 ENUM
   10.2 Distributed Universal Numbering Discovery (DUNDi)
   10.3 Universal Communications Identifier (UCI)
11 Presentation characteristics
12 Service capability requirements
   12.1 Emergency services for DUST users
   12.2 Relay services
13 DUST and legacy systems
   13.1 Alternative approaches
   13.2 DUST/legacy interoperability
   13.3 Transmission problems for legacy text telephony in new
        environments
14 Requirements for DUST verified against technical facilities
15 Outstanding issues
16 Summary and recommendations
Annex A (informative): Text conversation - The existing situation
      A.1 Text telephony
      A.2 Current PSTN textphone systems
      A.3 Establishing a call
      A.4 System problems
      A.5 Mobile systems for interactive text conversation
      A.6 IP based text
      A.7 Speech and text
      A.8 Total Conversation
      A.9 Special services
Annex B (informative): Stage 2 description of DUST (simplified)
      B.1 Introduction
      B.2 Functional entity model and information flows
Annex C (informative): Stage 3 requirements - Session
        Initiation Protocol (SIP)
      C.1 DUST Characteristics in SIP environment
      C.2 Signalling characteristics
      C.3 Transmission characteristics
      C.4 Support of supplementary services
Annex D (informative): Stage 3 requirements - ITU-T
        Recommendation H.323
      D.1 H.323
Annex E (informative): Stage 3 requirements - ISDN
      E.1 H.320
      E.2 ITU-T Recommendation H.324 and H.225
Annex F (informative): Stage 3 requirements - 3GPP
      F.1 3GPP IP Multimedia Subsystem
      F.2 3GPP Circuit-Switched CS MM
Annex G (informative): Stage 3 Requirements - Data conferencing
      G.1 T.120
Annex H (informative): Reference software
      H.1 Reference software information
      H.2 Executable IP text telephone SIPcon1
      H.3 Source code for T.140 text presentation protocol
      H.4 Source code for IP transport of text
Annex I (informative): Bibliography
History

Recognizes existing textphones, chat systems and protocols, identifies user requirements for effective text and telephone conversation, and gives methods of fulfilling these requirements.