ETR 120 : 20001

Foreword
1 Scope
2 References
3 Definitions and abbreviations
   3.1 Definitions
   3.2 Abbreviations
4 Applicability of services
5 Realisation of service
6 Other users perception of the open channel operation
   6.1 Single timeslot open channel operation
   6.2 Distinction between group call and circuit mode data
7 Optimisation of the call set-up protocol
   7.1 Definition of performance parameters
8 Optimisation of the supplementary services involved at the
   set-up
   8.1 Definition of performance parameters
9 System performance parameters
   9.1 Modelling of the air interface protocol
10 Composition of annexes
Annex A (informative): Group voice call scenarios (TETRA 03.52)
      A.1 Procedures for message trunked systems
      A.2 Procedures for transmission trunked systems
      A.3 Procedures for quasi-transmission trunked systems
Annex B (informative): Supplementary Service stage 1: Access
        Priority (SS-AP) (TETRA 03.69)
      B.1 Scope
      B.2 Normative references
      B.3 Definitions and abbreviations (TETRA 01.04)
      B.4 Supplementary Service Access Priority (SS-AP)
          Stage 1 specification
Annex C (informative): Supplementary Service stage 1:
        Priority Call (SS-PC) (TETRA 03.70)
      C.1 Scope
      C.2 Normative references
      C.3 Definitions, symbols and abbreviations (if any)
      C.4 Supplementary Service Priority Call (SS-PC)
          Stage 1 specification
Annex D (informative): Supplementary Service stage 1:
        Pre-emptive Priority Call (SS-PPC) (TETRA 03.76)
      D.1 Scope
      D.2 Normative references
      D.3 Definitions and abbreviations (TETRA 01.04)
      D.4 Supplementary Service Pre-emptive Priority Call
          (SS-PPC) Stage 1 specification
Annex E (informative): Supplementary Service stage 1: Call
        Retention (SS-CRT) (TETRA 03.85)
      E.1 Scope
      E.2 Normative references
      E.3 Definitions and abbreviations
      E.4 Supplementary Service Call Retention (SS-CRT)
          stage 1 specification
Annex F (informative): Supplementary Service stage 1: Call
        Authorized by Dispatcher (SS-CAD) (TETRA 03.66)
      F.1 Scope
      F.2 Normative references
      F.3 Definitions and abbreviations (TETRA 01.04)
      F.4 Supplementary Service Call Authorized by Dispatcher
          (SS-CAD) Stage 1 specification
Annex G (informative): Supplementary Service stage 1: Late
        Entry (SS-LE) (TETRA 03.74)
      G.1 Scope
      G.2 Normative references
      G.3 Definitions and abbreviations (TETRA 01.04)
      G.4 Supplementary Service Late Entry (SS-LE)
          Stage 1 specification
Annex H (informative): Supplementary Service stage 1: Dynamic
        Group Number Assignment (SS-DGNA) (TETRA 03.83)
      H.1 Scope
      H.2 Normative references
      H.3 Definitions and abbreviations (TETRA 01.04)
      H.4 Supplementary Service Dynamic Group Number
          Assignment (SS-DGNA) Stage 1 specification
Annex J (informative): Supplementary Service stage 1:
        Transfer of Control (SS-TC) (TETRA 03.75)
      J.1 Scope
      J.2 Normative references
      J.3 Definitions and abbreviations (TETRA 01.04)
      J.4 Supplementary Service Transfer of Control (SS-TC)
          Stage 1 specification
History