Electricity metering data exchange - The DLMS/COSEM suite - Part 7-6: The 3-layer, connection-oriented HDLC based communication profile (IEC 62056-7-6:2013)
Electricity metering - Data exchange for meter reading, tariff and load control - Part 42: Physical layer services and procedures for connection-oriented asynchronous data exchange— 62 стр.
Electricity metering. Data exchange for meter reading, tariff and load control. Physical layer services and procedures for connection-oriented asynchronous data exchange— 30 стр.