IEC TS 62056-41:1998

Foreword
1 General
   1.1 Scope
   1.2 Normative references
2 General description
   2.1 Basic vocabulary
   2.2 Layers and protocols
   2.3 Specification language
3 Physical layer
   3.1 Physical+ protocol
   3.2 V.24/V.28 environment
   3.3 Automatic call/answer: V.25/V.25bis environment
   3.4 General information
   3.5 Timing diagram: half-duplex mode
   3.6 Timing diagram: full-duplex mode
   3.7 Physical services and service primitives
   3.8 Physical parameters
   3.9 State transitions: half-duplex mode
   3.10 State transitions: full-duplex mode
   3.11 List and processing or errors
4 Data Link layer
   4.1 Link+ protocol
   4.2 General information
   4.3 'Send and wait' procedure
   4.4 Data link services and service primitives
   4.5 Frame description
   4.6 Data integrity and transmission efficiency
   4.7 Management of exchanges
   4.8 Data link parameters
   4.9 State transitions
   4.10 List and processing of errors
5 Application layer
   5.1 Transport sublayer
   5.2 Application sublayer
Annex A (normative) Specification language
Annex B (normative) List of fatal errors
Annex C (informative) Profiles
Annex D (normative) Principle of the cyclical redundancy
        check (CRC)
Annex E (informative) Data integrity
Annex F (informative) Transmission efficiency

Describes a 3 layer data exchange architecture used for communication with large industrial and commercial customer's metering equipment (remote reading for billing purpose). The public switched telephone network (PSTN) is used as a communication medium for this data exchange. This publication is a Technical report type 2