MS/TP: two devices timeout, A–B dips when a third joins. Polarity/EOL/baud done — what’s your next kill-one?
BAS call: MS/TP trunk, two devices timing out. When a third joins, **A–B differential** drops (idle vs when that node comes online). Polarity, EOL, and baud already checked.
Still live: bias resistors vs segment split vs a failing transceiver / unit-load on one node that only shows under load.
What’s the **one** discriminating check you’d run next before another controller swap or re-term shotgun — e.g. A–B differential under load, bias check, or segment split?
Not a product pitch — just how you sequence the kill-one step when the usual three don’t settle it.
u/Connect_Strength9257 — 14 days ago