UNE-EN 60870-6-601
TELECONTROL EQUIPMENT AND SYSTEMS. PART 6: TELECONTROL PROTOCOLS COMPATIBLE WITH ISO STANDARDS AND ITU-T RECOMMENDATIONS. SECTION 601: FUNCTIONAL PROFILE FOR PROVIDING THE CONNECTION-ORIENTED TRANSPORT SERVICE IN END SYSTEM CONNECTED VIA PERMANENT ACESS TO A PACKET SWITCHED DATA NETWORK. (Endorsed by AENOR in November of 1995.)