OTDR Testing & Certification
Core Precision provides OLS and OTDR testing with fibre optic certification support for new installations, fault finding, repairs and project handovers. At Core Precision we only use the highest level of industry standard equipment.
Testing is a vital part of any fibre optic project. It helps confirm that the network has been installed correctly, that splices and connectors are performing as expected, and that the fibre link is ready for use.
Our team supports clients across the UK and worldwide with accurate testing and clear reporting.
What Is OTDR Testing?
OTDR stands for Optical Time Domain Reflectometer.
OTDR testing sends a light signal through the fibre and measures reflections along the link. This helps identify events such as splices, connectors, bends, breaks and loss points.
The result is a trace that shows how the fibre is performing across its length.
What Is OLS Testing?
OLS stands for Optical Light Source.
OLS testing sends a controlled light signal through the fibre link, usually from one end of the cable, while a power meter measures the signal received at the other end.
This test checks the overall loss across the fibre link and helps confirm whether the connection is performing within the required limits.
The result shows how much light is being lost through the cable, connectors and splices, giving a clear pass or fail reading for the installed fibre.
Why OTDR Testing Matters
OTDR testing gives clients valuable proof of fibre performance. It can support:
Project handover
Network commissioning
Fault location
Repair verification
Quality assurance
Contractor sign-off
Future maintenance planning
Without proper testing, network issues may go unnoticed until they cause performance problems later.
OTDR Testing Services
Core Precision provides OTDR testing for a wide range of fibre networks. Our services include:
Fibre link testing
OTDR trace testing
Splice loss checks
Connector event checks
Fault location
Bend and break identification
Pre-handover testing
Post-repair testing
Test result reporting
Fibre certification support
We can test fibre networks as part of an installation, repair project or independent review.
Testing for Installation and Handover
Fibre installation is not complete until the network has been tested.
Core Precision can provide testing after installation to support handover and project sign-off. This gives contractors, project managers and network owners confidence that the link has been checked properly.
Clear reporting also helps create a useful record for future maintenance.
Testing for Fault Finding and Repairs
OTDR testing is also useful when a fibre network is not working as expected.
It can help locate where a fault is likely to be and support faster repair decisions. After the repair, testing can confirm whether the link has been restored.
This makes OTDR testing an important part of both diagnosis and quality control.
FAQs
What is OTDR testing used for?
OTDR testing is used to check fibre performance and locate events such as splices, bends, breaks, connectors and loss points.
What does an OTDR test measure?
An OTDR measures loss along the whole link, the individual loss of every splice and connector, reflectance and the exact length of the fibre. The result is a trace that shows every event on the link and its distance, which is what makes it so useful for certification and fault finding.
Can OTDR testing find fibre faults?
Yes. OTDR testing can help locate faults along a fibre route, including breaks, bends and high loss events.
Do you provide reports?
Yes. Core Precision can provide test results and reporting to support project handover or repair records.
What is a good dB reading for fibre?
It depends on the link budget the network was designed to. As a guide, a modern fusion splice typically measures around 0.1 dB or better and a connector pair around 0.3 dB, and the total loss of the link must sit inside the design budget. We certify results against the applicable standard so there is no ambiguity.
What is the dead zone in an OTDR?
The dead zone is the short distance after a reflective event where the OTDR cannot resolve detail while its detector recovers. It is managed with launch and tail leads and correct test settings, which is one of the reasons OTDR results need experienced interpretation.
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