🧪 Undersea Cable Fault: TDR Fault Location & Network Failover (2D)

This 2D companion turns the 3D submarine-cable scene into a working instrument: real transmission-line reflection math (ρ = (Zf − Z0)/(Zf + Z0)) drives a genuine time-domain-reflectometer trace, so moving the fault-distance, fault-type, velocity-factor or cable-length sliders changes exactly when the reflected step arrives and which way it points — open circuits push the trace up, shorts collapse it to zero, partial faults sit in between. A second panel turns the same fault into a capacity hit on a three-route network graph and greedily reroutes a fixed traffic demand across the surviving paths, reporting the resulting blended latency and unserved-traffic percentage the way a real network-operations team would read a failover event.