Table of Contents

Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
  3.1 Definitions
  3.2 Symbols
  3.3 Abbreviations
4 System architecture
  4.1 General network configuration
  4.2 Addressing
  4.3 Usage of repeaters
5 Basic system definitions
  5.1 Modulation method
  5.2 Transmission format
  5.3 Link establishment time
  5.4 Bit synchronization
  5.5 Block synchronization
  5.6 Codewords
  5.7 Hang-over bit
  5.8 Signalling cycle
6 Services and facilities
  6.1 Selective calls
  6.2 Call priority levels
  6.3 Call management
  6.4 Telephone access
  6.5 Special functions
  6.6 Identification
7 Codeword and block definition
  7.1 Address block
  7.2 Operating mode characteristic
8 Message procedures
  8.1 Normal or priority radio call procedure
  8.2 Broadcast call procedure
  8.3 Emergency call procedure
  8.4 Manual response procedure
  8.5 Call cancellation procedure
  8.6 Repeater access procedure
  8.7 Telephone call procedure
  8.8 Call back request procedure
  8.9 Change channel procedure
  8.10 Mobile enable and mobile disable procedure
  8.11 Status transfer procedure
  8.12 Short data transfer procedure
9 Channel access protocol and occupation rules
  9.1 Channel access
  9.2 Retry procedure
  9.3 Reversion time
10 Data protocol
  10.1 Dialogue protocol services and facilities
  10.2 Data transmission structure
  10.3 Elements of the control block
  10.4 I-frames
  10.5 S-frames
  10.6 U-frames
  10.7 Data compression
11 Definition of the data transfer protocol
  11.1 Data link set-up phase
  11.2 Data transfer phase
  11.3 Resetting phase
  11.4 Transfer termination phase
12 Channel access protocol and occupation rules for
   data transmission
  12.1 Channel access for data transmission
  12.2 Retry procedure
Annex A (normative): Values of system parameters
Annex B (normative): The Radix 40 data compression
                     method
Annex C (normative): Hexadecimal digit coding
Annex D (normative): Regional Code
Annex E (normative): OMC coding
Annex F (informative): Examples of channel access and
                       occupation rules
  F.1 Message duration
  F.2 Successful transmission of a message
  F.3 Unsuccessful transmission of a message and
      repetition
  F.4 Channel access with time intervals
  F.5 Channel access for data transmission with time
      intervals
Annex G (informative): System-terminal interface
  G.1 Interface for data terminal equipment
  G.2 Procedure for the system-terminal interface
Annex H (informative): Examples for the data dialogue
                       procedure
  H.1 Test algorithm for the validity of N(R)
  H.2 State transition table of the data dialogue
      procedure
Annex J (informative): Verification of the integrity
                       of the I-frames
Annex K (informative): Using forward error correction
Annex L (informative): Examples of using the COM field
Annex M (informative): Bibliography
History

Abstract

Describes a binary signalling and data transmission system for private radio equipment operating at 1200 bit/s using indirect modulation.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	RES 2