Fiber Link Designer | Conduit Calculator Pro

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Start with a location

Add buildings, panels, or maintenance holes.
Connect them with fiber and enter each segment’s length.

Point-to-point design · no drawing scale assumed

0 / 100 items · 0 segments · Drag blank space to pan · Arrow keys move · Delete removes selection · Undo restores

Project settings

Your fiber drawing

Project nameRevisionPrepared byDistance units — all cablesApplies to the entire drawing. Existing distances convert automatically.Engineering reserve (dB)Reserve is a project design choice. The starting 3 dB is not a mandatory BICSI value.

Application & reference planes

Reference boundaryApplication / standard / data-sheet referenceApplication maximum channel loss (dB)Application maximum reach (m)Use the applicable IEEE / manufacturer limits for this exact fiber, wavelength and reference boundary. Compared separately from TX/RX power checks; no application is assumed.

Standards & calculation basis

Planning checks, not standards certification. Confirm the project's adopted TIA/ISO/IEC edition, IEEE application limits and optic data sheets. Reach, bandwidth/dispersion, reflectance, polarity, connector compatibility and field acceptance testing need independent verification. Test-cord/reference-plane allowances are not automatically inferred. The 3 dB starting reserve is an editable engineering choice, not a universal BICSI requirement.

Maximum path loss = summed cable losses + counted mated-pair losses + counted splice losses. Both directions use their own endpoint specifications.

BICSI: loss-budget formula and component allowances (cites TIA-568-C.3)

FOA Installation Standard 2025, Annex A: cable and event allowances

Fluke Networks: application limits versus cabling loss budgets

Project notes

Click any item or cable to edit it. Drag an item to move it; use its connection dot to start a cable.

One drawing represents one selected strand path. Use another project for a different strand or operating wavelength.

REVIEWAPPLICATION REVIEWMax loss: Not evaluatedMargin after reserve: Not evaluatedFiber: Length needed