Product — Fiber Damage Locator

Turn OTDR distance into a GPS address.

Export your fiber route from your corporate mapping system and upload an OTDR .sor file. We calculate the exact GPS coordinates of the fiber break — with a street address — plotted on satellite imagery. Your field crew drives to the right span on the first roll.

Fiber Damage Locator — import interface

The bridge nobody built

OTDR hardware measures the fiber and stops — it has no idea where that number lands on a map. GIS and OSS platforms know where your plant is supposed to be, but none of them read a raw .sor file, and none of them take a field correction back from a tech standing at a splice case. Two essential, expensive categories of tooling — and nothing has ever connected them. Fiber Damage Locator reads the number your OTDR already gives you, resolves it against whatever plant data you have, and writes clean, GPS-precise as-built data back into your system of record. Not a cheaper alternative to either tool — the connection between them that was missing.

Core Capabilities

Everything you need to locate a fiber fault

Three import modes. OTDR trace parsing. Satellite map. One red pin — at the break.

🗺️

Satellite map view

The fiber route is drawn on satellite imagery. Splice case markers show each documented node. Zoom in on the fault pin to see exactly which span and which building.

📂

Mapping system import

Works with exports from your internal GIS or network documentation platform — Esri ArcGIS, OSPInsight, Cityworks, QGIS, and others. If your team maps the fiber, this tool can locate faults on it.

🔴

OTDR fault location

Upload a .sor file. Fault distance is read automatically. Click Locate Fault — a red pin drops at the GPS coordinate with a reverse-geocoded street address.

🛣️

Smart road-snap geometry

Each span checks whether a road plausibly runs along the fiber's path — not just whether one's nearby — before snapping. Straight-line otherwise, so you get an honest guess instead of a misleadingly road-realistic wrong one.

✏️

Drag-to-adjust path

Move the fiber route to match the actual cable run. The adjusted path improves fault accuracy by aligning cable-footage spans to their true geographic length.

💾

GeoJSON file export

Export any route as a .geojson file to your desktop. Load it back in later — build a growing library of cable paths without a central database requirement.

Two ways to get your route on the map

01
Best accuracy

GPS Coordinates Export

Export splice case GPS coordinates and measured cable footage from your internal GIS or network documentation platform — Excel or CSV, whichever your system produces. The route is built automatically and follows roads where a road plausibly runs along the fiber's path; drag waypoints on the map afterward to match the actual cable path exactly.

02
Flexible

Manual Draw

Drop a start pin and trace the fiber path point by point on the satellite map — drag to reshape, undo if you make a mistake. Place every splice enclosure, splitter, and tap you build at its real GPS coordinate, branch off a splitter for real FTTx tree topology, and attach the OTDR trace proving the loss at each splice. Export the route as GeoJSON for reuse, or export the whole as-built as one package.

Accuracy

How accurate is it?

<300
feet — live result
Our target is ±500 feet of the actual break point. The real-world test below placed the fault pin within ~200–300 feet of the confirmed dig location on a 11.4-mile (18.4 km) live fiber circuit in Charlotte, NC — using only an OTDR .sor file and a GPS coordinate export from the carrier's internal GIS system. The route was auto-generated by road-following geometry between splice cases, with no manual path adjustments required.
Live Test Verified
Charlotte, NC — 18.4 km fiber circuit
11 splice cases · EXFO FTBx-740C OTDR · G.652 SMF · 1542 nm
Fault pin placed on satellite map — Charlotte NC fiber circuit
Circuit length
18.4 km
11.4 miles · 11 splice cases documented
OTDR fault distance
18.435 km
End-of-fiber reflection — complete break
Location error
~250 ft
Within 1 city block of confirmed dig location. Within OTDR measurement resolution at this range.
Time to fault pin
< 60 sec
Upload xlsx + .sor → Locate Fault. No manual path drawing required.
Import method
Excel GPS + OSRM
Splice case GPS from carrier GIS export. Route auto-generated via road-following geometry.
Single User Tier — $29.99/mo

You have the OTDR.
Now you can actually use what it tells you.

Independent contractors carry OTDRs every day and generate .sor files at every job site. But without a GIS system or mapping platform, the fault distance is just a number. There has never been an affordable tool built specifically for the tech working alone in the field.

The Single User tier changes that. Draw your fiber route on the satellite map by clicking — no corporate system, no PDF, no spreadsheet required. Upload your .sor file. Get a GPS pin and street address at the fault. Export your route as a GeoJSON file and reload it next time you're on that same cable.

See Single User pricing →
What it takes to start
✓  An OTDR
✓  A .sor file
✓  A browser
No GIS or mapping system required to start — connect one later and every fault gets more accurate.
New — As-Built Capture

You built it. Now proving it shouldn't be a second job.

Contractors don't just find faults — they build splice cases, splitters, and taps every day, then have to hand the service provider clean as-built records for their GIS. That's usually a separate, manual chore: a hand sketch, a spreadsheet typed up after the fact, GPS coordinates estimated from memory.

Manual Draw now doubles as an as-built capture tool. Place every part at its real GPS coordinate, branch off a splitter for real FTTx tree topology, attach the OTDR trace proving the loss at each splice — then export one package: CSV, Excel, GeoJSON, and a labeled PDF map, ready to hand over.

For BEAD-funded builds, that package doubles as the physical as-built record most state compliance plans require you to keep on file for five years — captured as a byproduct of the work, not a separate paperwork chore afterward.

See how it works →
Splice, splitter, and tap parts placed along a drawn fiber route, each color-coded by type

Who uses the Fiber Damage Locator

NOC — 2 AM fiber cut

Ticket comes in. Pull the fiber route from your internal mapping system, attach the OTDR trace, hit Locate Fault, and dispatch the field crew to the right span before anyone drives anywhere wrong.

OSP — Pre-dig verification

Before breaking ground to repair, confirm which span the break is in and which splice case enclosure is closest. Reduces unnecessary excavation.

Field tech — Route confirmation

Pull up the route on a tablet before heading out. See the exact location on satellite imagery and navigate to it directly from the fault result.

Contractor — Route library

Draw and export every cable run you work on. Your GeoJSON route library lives on your machine — reload any route instantly the next time you're called back to that circuit.

Try the Fiber Damage Locator free for 7 days

No credit card. Full access. Import a route from your mapping system on your first login.

Start Free Trial