Question
The ETS diagnostics function requires direct bus access, so the computer must be connected to the KNX installation via a USB interface (KNX TP or RF USB) or an IP interface (KNX TP/IP).
Answer
True
Preparation tip
Plug ETS into the bus via USB or IP before attempting any online diagnostics.
Source
KNX Basic Course Documentation — 8.1 — p. 289
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