SwiftLogic turns a standard optical fiber into tens of kilometres of continuous vibration sensors. A laser unit reads the line; our platform stores the raw signal, draws it as a live waterfall, recognises what is happening — people, vehicles, trains, drones, digging, leaks — and alerts your team on any device, 24/7.
* Typical for phase-sensitive OTDR (Φ-OTDR) systems — see figures below.
Sensing range per fiber channel. Long-range units reach about 100 km; two channels per unit are common.
Spatial resolution along the cable — every section of fiber is its own sensing point. About 10 m with a 100 ns pulse.
Vibration bandwidth at a full 50 km line, measured everywhere at once. Shorter lines allow higher pulse rates.
Power needed along the route. Glass carries no current, so the line is immune to electromagnetic interference.
Figures are typical for the technology class and shown for orientation. Real performance depends on the laser unit, fiber type and how the cable is installed — we measure it on your line during a pilot.
No cameras, microphones or power supplies along the route. The fiber itself is the sensor — the intelligence sits at the ends: a laser unit and the SwiftLogic platform.
The laser unit fires short, coherent light pulses into one fiber core — thousands of times per second.
Microscopic irregularities in the glass reflect a little light back (Rayleigh backscatter). Vibration near the cable shifts its phase; the echo's travel time says exactly where.
The unit streams raw data to SwiftLogic. We store the history and draw it as a live waterfall: distance × time × vibration energy.
Signal processing and machine-learning models classify each signature — footsteps, vehicle, train, digging, leak — with position, speed and confidence.
Confirmed events reach your team at once — push, email, Telegram, webhooks — on web, mobile and desktop, 24/7.
Each row is a snapshot of the entire fiber; time flows downward. Anything that moves draws a slanted trace — the flatter it is, the faster the object. Anything that stays in place draws a vertical stripe. Pick a signature to see it.
Pick a scenario. Each one shows the problem, what the fiber hears and what lands on your operator's screen.
Cameras and gates cover points; most of a long perimeter is dark at night, and patrols can't be everywhere.
Footsteps press on the soil above the buried cable — a faint, rhythmic signature moving at walking pace.
An alarm with the spot on the map, direction and speed, seconds after the first steps.
Good to know: sensitivity to footsteps falls with distance from the cable. Soil and burial depth set the usable corridor.
Intruders choose the stretch no camera watches. A fence on its own only slows them down.
Fiber fixed along the fence feels every shake of the mesh. Climbing, cutting and lifting each have their own rhythm.
A classified alarm — climb or cut — with the exact fence section, before anyone is through.
Good to know: wind and heavy rain shake fences too. Detectors are tuned on site so weather doesn't raise alarms.
Loops and cameras count traffic at a few points. Between them, a stopped truck or a growing queue goes unseen.
Every vehicle draws its own line on the waterfall — position, direction and speed along the whole road.
Counts, speeds and flow for every section, and alerts when traffic slows down or stops.
Good to know: existing roadside telecom fiber often works. Separating lanes on wide roads needs careful calibration.
Between stations a train's position is known only by block section — and people or objects on the line stay invisible.
The trackside cable hears a train as a strong, wide signature moving at line speed — and anything else near the track.
Continuous position, speed and length of every train, plus alarms for people or objects on the line.
Good to know: on multi-track lines, telling which track a train is on needs a second input, such as signalling data.
Small drones fly low, are hard to see at night and slip under coverage meant for bigger targets.
Rotor noise is a distinctive buzz. Fiber on poles, fences or aerial spans picks it up as the drone passes overhead.
An alarm with the stretch of line the drone crossed and its direction of travel.
Good to know: this works where the fiber is in the air or on a fence, at short range. Buried fiber hears drones poorly — we'll tell you honestly whether your route suits it.
Third-party digging is a leading cause of damage to buried cables and pipelines — and you usually learn about it after the cut.
Bucket strikes are short, heavy impacts that repeat in one spot — easy to tell apart from passing traffic.
An early warning with the dig location while the machine is still working, so a crew can stop it before contact.
Good to know: a spare core in the cable you want to protect is often enough — the line can watch over its own route.
Leaks hide for weeks. A pressure drop says there is a leak somewhere — not where to dig.
Escaping water or product makes a steady hiss in one place, day and night — a fixed band on the waterfall.
The leak's position along the pipe, so the crew digs once, in the right place.
Field evidence: in a 2026 UK trial, Openreach and Affinity Water used telecom fiber to locate 100+ leaks along 650 km of water pipes in three months. Fiber must run along or near the pipe.
On mountain railways and roads, the first to find fallen rocks is often the driver.
Each impact is a sharp, powerful burst; a slide is a cluster of them along one stretch.
An immediate alarm with the affected section, so traffic can be stopped or slowed before it gets there.
Good to know: fiber along the track or road hears what lands near it. Slopes far from the cable need their own coverage.
Cable theft and vandalism knock out signalling, power and communications — and repairs take hours.
Lifting a chamber lid, handling and cutting cable are close, distinctive vibrations. If the fiber itself is cut, the line shows exactly where it ends.
An alarm while it is happening, with the chamber or cable section — and the break point if the fiber is cut.
Good to know: the sensing fiber should share the route or duct with the assets it protects.
Fiber Sensing is one module of SwiftLogic. A fiber alarm can turn the nearest PTZ camera to the exact spot for video verification and send the closest patrol vehicle — all recorded in one event timeline.
Fiber Sensing finds where along the line something is happening and what it is.
Video Analytics points a camera at that spot and confirms it with object detection.
Vehicle Diagnostics & Monitoring knows which patrol vehicle is closest and tracks it to the scene.
The laser unit hears the line. Everything after that — storage, waterfall, analysis, alerts, apps — is the SwiftLogic platform.
The same live waterfall, map and events in the browser, in native mobile apps and on the desktop.
SwiftLogic runs on your own servers, inside your network.
We host, update and watch over the platform for you.
Send each type of event to the right people and the right channel — webhooks hand it to your own systems.
Raw signal history is kept, so every event can be replayed and re-analysed.
The whole line is analysed continuously — night, rain or fog — and your team has access around the clock.
Each module works on its own and shares events, maps and users with the others.
Fiber sensing is powerful, not magic. Here is what it needs and where its limits are.
One free single-mode fiber core — a spare “dark” fiber in an existing telecom cable works — or a dedicated sensing cable. The laser unit connects at one end.
A lot. Fence-mounted fiber is best for climbing and cutting, buried fiber for footsteps and digging, aerial or fence fiber for drones.
A single fiber tells you where along its route something happens, not which side of it. On multi-track rail lines, the track needs a second input such as signalling data.
Data flows as soon as the unit is connected. Detectors are then tuned to your site's normal background noise during the pilot.
What your operators work with every day — on the wall screen, at the desk and in the pocket.
Bring us one fiber route. We connect the laser unit, show the live waterfall and tune detection to your site during a pilot.