this part of IEC 62056 standard, HDLC protocl standard-this is part of IEC 62056 standard, HDLC protocl standard

IEC62056绿皮书，包括通信协议、通信规程等内容。This fifth edition of the "Green Book" includes the specification of the communication protocol layers based on:- IEC 62056-42, Electricity metering- Data exchange for meter reading, tariff

IEC62056-62（2002）接口类IC IEC62056-61（2002）对象识别系统OBIS IEC62056-53（2002）COSEM应用层 IEC62056-52（2004）DLMS服务器通讯协议管理 IEC62056-51（1998）应用层协议 IEC62056-47（待发布）用于IP网络的COSEM传输层 IEC62056-46（2002）应用HDLC协议的数据链路层 IEC6