Optical Cable
Explore how light is guided in a fiber and what happens when you bend it. Drag the launch angle, change the glass and the wavelength, and see numerical aperture, V number, modes and bending loss update.
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Resource grid: a slot of 14 symbols by 10 resource blocks with control, synchronisation, reference and data channels in distinct colours, and a highlight moving across the symbols.
Pick a topic to launch its live simulation.
Explore how light is guided in a fiber and what happens when you bend it. Drag the launch angle, change the glass and the wavelength, and see numerical aperture, V number, modes and bending loss update.
Learn the standard 12-colour code for fibers and buffer tubes. Explore a cable cross-section, then test yourself on naming a fiber from its number and finding a fiber number from its tube and colour.
Strip, clean, cleave, align and splice. See how cleave angle, core offset, dust and arc settings change the splice loss, and decide when to re-do a splice.
Measure the end-to-end loss of a fiber link the way it is done in the field: match the wavelengths, choose a reference method, clean the connectors, set the reference and test in both directions.
Build an optical link from transmitter to receiver by adding and re-ordering elements. The tool checks worst-case sensitivity and best-case overload and draws the power level along the way.
Set range, pulse width and averaging on a virtual OTDR, find the events in a fiber and measure loss with draggable markers. See for yourself why dead zone and dynamic range pull in opposite directions.
See why bit rate, distance, wavelength and laser width limit how far a signal can travel. Pulses spread in the fiber, neighbouring bits blur together and the eye diagram closes.
Build a PON network and configure it from a real-style OLT command line. Connect splitters and ONTs on the right, then register ONTs, create profiles, map VLANs and verify services on the left. The topology reacts to every command.
Practise real provisioning and troubleshooting steps on a simulated OLT: find an unregistered ONT, create a profile, register it, map services and fix common faults. Tab completion and history work like a real terminal.
Watch an ONT go from power-on to operation through the standard activation states. Inject faults (wrong serial number, weak light, too far, duplicate serial) and see exactly where and why activation stops.
Drag ONTs along the fiber and see why ranging is essential in a PON. Without it, far ONTs arrive late and collide. With it, every burst lands in its own time slot.
Build the GPON downstream and upstream frames byte by byte. See how GEM headers, the bandwidth map and burst overhead eat into the 2.488 and 1.244 Gbit/s line rates.