Check a transceiver against link distance and optical loss budget to confirm the run will actually come up.
Two independent tests must pass: the distance must be inside the optic's rated reach, and the accumulated fibre and connector loss must stay inside the standard's channel insertion loss budget. Patch panels are usually the dominant loss on short multimode runs. An optic that is 'rated for 100 m' will still fail at 80 m through four patch panels, and this is the arithmetic that predicts it before the link is built.
Transceiver Compatibility
total loss = distance km × attenuation + connector pairs × loss per pair; the link works when distance ≤ rated reach and total loss ≤ budget.
total loss = distance km × attenuation + connector pairs × loss per pair; the link works when distance ≤ rated reach and total loss ≤ budget. Two independent tests must pass: the distance must be inside the optic's rated reach, and the accumulated fibre and connector loss must stay inside the standard's channel insertion loss budget. Patch panels are usually the dominant loss on short multimode runs.
An optic that is 'rated for 100 m' will still fail at 80 m through four patch panels, and this is the arithmetic that predicts it before the link is built.
This calculator takes 6 inputs: Link distance, Transceiver, Fibre attenuation, Mated connector pairs, Loss per connector pair, Channel insertion loss budget. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.