IEC TR 62056-41:1998 pdf download – Electricity metering – Data exchange formeter reading, tariff and load control – Part 41: Data exchange using wide area networks:Public switched telephone network (PSTN)with LINK+ protocol

IEC TR 62056-41:1998 pdf download – Electricity metering – Data exchange formeter reading, tariff and load control – Part 41: Data exchange using wide area networks:Public switched telephone network (PSTN)with LINK+ protocol.
This technical report describes a three layer data exchange architecture used for communication with large industrial and commercial customers metering equipment (aiming, in particular. at the remote reading of these meters for billing purposes). The public switched telephone network (PSTN) is used as a communicahon medium for this data exchange.
This technical report defines the protocols to be applied for each layer of the architecture (physical, data link and application), making use as far as possible of existing standards, such as
— ITU-T V.22, V.22bis, V.23, V.24, V.25. V,25bis. V.28, V.32, V.32bis and V.41 (ITU-T:
telecommunication standardization sector of the International Telecommunication Union),
— fEC 61334-4-41 which describes the DLMS (Distribution Line Message Specification) model.
1.2 NormatIve references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this technical report. Al the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this technical report are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of lEG and ISO maintain registers of currently valid International Standards
IEC 62056-51 :1998 Electricity metering — Data exchange for meter reading, tariff and load control — Part 51: Application layer protocols for meter data exchange
IEC 61334-4-41:1996, Distribution automation using distribution line carrier systems — Part 4:
Data communication protocols — Section 41.’ Application protocol — Distribution line message
specification (OLUS)
ITU-T V.22:1988, 1 200 bits per second duplex modem standardized for use in the general switched telephone network and on point-to-point leased 2-wire telephone-type circuits
ITU-T V.22bis:1988. 2400 bits per second duplex modem standardized for use in the general switched telephone network and on point-to-point leased 2-wire telephone-type circuits
ITU-T V.23:1988, 6OtEl’l 200 baud modem standardized for use in the general switched telephone network
ITU-T V.24:1996, List of definitions for interchange circuits between data terminal equipment (DTE) and data circuit-terminating equipment (OCE)
ITU-T V.25:1996. Automatic answering equipment and general procedures for automatic calling equipment on the general switched telephone network including procedures for disabling of echo control devices for both manually and automatically established calls
lTtJ•T V.25bis:1 996. Synchronous and asynchronous automatic dialling Procedures on switched networks
ITU-T V.28:1993. Electrical characteristics for unbalanced double-current interchange circuits
ITU-T V.32:1993, A family of 2-wire, duplex modems operating at data signalling rates of up to
9 600 bitJs 10, use on the general switched telephone network and on leased telephone-type
Circuits
ITU.T V,32b1s:1991 • A duplex modem operating at data signalling rates of up to 14 400 bit/s for use on the general switched telephone network and on leased point-to-point 2-wire telephone- type circuits
ITU-T V.41:1972. Code-independent error-control system
ISO 2110:1989. Information technology — Data communication — 25-pole DTE/DCE interface
connector and contact number assignments
2 General description
2.1 Basic vocabulary
All communications involve two sets of equipment represented by the terms Caller system and Called system. The Caller is the system that decides to initiate a communication with a remote system known as the Called party: these denominations remain valid throughout the duration of the communication.
A communication is broken down into a certain number of transactions. Each transaction is represented by a transmission from the Transmitter to the Receiver. During the sequence of transactions, the Caller and Called systems take turns to act as Transmitter and Receiver.
The terms Client and Server have the same meanings as in the DLMS model (see IEC 61334-4-41). The Server is the system that acts as a VDE (see IEC 61334-4-41) for the submission of all special service requests The Client is the system that uses the Server for a specific purpose by means of one or more service requests.
The situation involving a Caller Client and a Called Server is undoubtedly the most frequent case, but a communication based on a Caller Server and a Called Client as also possible, in particular to report the occurrence of an urgent alarm.