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Description / Abstract:
This standard details the criteria required for communication
between a C12.21 Device and a C12.21 Client via a modem connected
to the switched telephone network. The C12.21 Client could be a
laptop or portable computer, a master station system, or some other
electronic communications device.
This standard does not specify the implementation requirements
of the telephone switched network to the modem, nor does it include
definitions for the establishment of the communication channel.
This document provides details for an implementation of the Open
Systems Interconnection (OSI) seven-layer model in accordance with
ISO/IEC 7498-1.1
The protocol specified in this standard was designed to
transport data in Table format. The Table definitions are in ANSI
C12.19 and in Annex D of this document.
This standard specifies the differences between ANSI C12.18-2006
and ANSI C12.19-1997 and the features and services required to
describe a protocol specification for telephone modem
communications.
Purpose
The utility industry has need for a standard that provides an
operable "plug and play" environment for field metering devices.
The purpose of this standard is to define the means to transport
the Utility Industry End Device Data Tables via a telephone modem
so that multisource environment and End Device interchangeability
is possible.
1 Information on references can be found in Clause
2.