( = application service data unit, "rakendusteenuse andmeüksus")

olemus
andmeside protokollielement, muutpikkusega edastuskaader energeetika kaugjuhtimisstandardis IEC 60870,
= application layer message submitted to lower layers for transmission, using the IEC 60870-5 protocol

ülevaateid
https://infosys.beckhoff.com/index.php?content=../content/1031/tf6500_tc3_iec60870_5_10x/984444939.html&id=
https://en.wikipedia.org/wiki/IEC_60870-5