標準號：BS EN 62056-42-2002
中文標準名稱：電量測量.表讀數、計費和負載控制的數據交換.定向連接異步數據交換的物理層工作和程序
英文標準名稱：Electricity metering - Data exchange for meter reading, tariff and load control - Physical layer services and procedures for connection-oriented asynchronous data exchange
標準類型：N20
發布日期：2002/7/16 12:00:00
實施日期：2002/7/16 12:00:00
中國標準分類號：N20
國際標準分類號：35.100.10;91.140.50
適用范圍：This part of IEC 62056 specifies the physical layer services and protocols within theCompanion Specification for Energy Metering (COSEM) three-layer connection orientedprofile for asynchronous data communication. The document does not specify physical layersignals and mechanical aspects. Local, implementation-specific issues are also not specified.In annex A, an example of how this physical layer can be used for data exchange through thePublic Switched Telephone Network (PSTN) using intelligent Hayes modems is given.The use of the physical layer for the purposes of direct local data exchange using an opticalport or a current loop physical interface is specified in IEC 62056-21.Annex B gives an explanation of the role of data models and protocols in electricity meterdata exchange.