UNE-EN 61334-4-1:1996 DISTRIBUTION AUTOMATION USING DISTRIBUTION LINE CARRIER SYSTEMS. PART 4: DATA COMMUNICATION PROTOCOLS. SECTION 1: REFERENCE MODEL OF THE COMMUNICATION SYSTEM (Endorsed by AENOR in November of 1997.)
1997UNE-EN 61334-4-1:1996 DISTRIBUTION AUTOMATION USING DISTRIBUTION LINE CARRIER SYSTEMS. PART 4: DATA COMMUNICATION PROTOCOLS. SECTION 1: REFERENCE MODEL OF THE COMMUNICATION SYSTEM (Endorsed by AENOR in November of 1997.)