NBN EN 28073 : 1994

Foreword
Introduction
1. Scope
2. Normative references
Section one: General
3. Definitions
4. Symbols and abbreviations
5. Overview of the Transport Protocol
Section two: Transport protocol specification
6. Elements of procedure
7. Protocol classes
8. Specification for class 0: Simple class
9. Specification for class 1: Basic error recovery
     class
10. Specification for class 2: Multiplexing class
11. Specification for class 3: Error recovery and multi-
     plexing class
12. Specification for class 4: Error detection and
     recovery class
13. Structure and encoding of TPDUs
Section three: Conformance
14. Conformance
Annex A State tables
Annex B Network connection management subprotocol
Annex C PICS Proforma
Annex D Checksum Algorithms
Annex E State tables for operation of class 4 over
         connection-mode and connectionless-mode network
         services

Specifies five classes of procedures when operating over the connection mode network service. Defines procedures in terms of: the interactions between a transport entity and the network service provider through the exchange of network service primitives; the interactions between peer transport entities through the exchange of transport protocol data units; the interactions between a transport entity and the transport service user in the same system through the exchange of transport service primitives.