Fibre Optic Testing Specialists
Professional fibre optic testing services delivered by experienced engineers across the UK.
We provide Tier 1 insertion loss testing, Tier 2 OTDR testing, and fibre end-face inspection to verify network performance, support project handover, and ensure full compliance with industry standards.
Trusted by telecoms contractors, installers and end clients, TNS Comms delivers accurate results, clear reporting and reliable support whether you’re commissioning a new network, auditing an existing installation, or fault-finding on live fibre infrastructure.
Fibre Optic Testing Specialists
TNS Comms provides professional fibre optic testing services across the UK, helping installers, contractors, and network owners verify that fibre networks are installed correctly and performing as designed. We deliver reliable Tier 1 insertion loss testing and Tier 2 OTDR testing, supported by clear reporting and fast turnaround.
From new fibre installations to fault diagnosis and network upgrades, we help remove uncertainty and give you confidence in your fibre infrastructure.
Professional Fibre Optic Testing Services
Fibre networks rely on precision. Small issues such as poor splicing, excessive bends, or contaminated connectors can lead to signal loss, instability, and future failures.
Our fibre optic testing services are designed to:
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Confirm fibre performance meets design expectations
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Identify faults before the network goes live
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Validate installation quality
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Support commissioning, handover, and sign-off
All testing is carried out by experienced engineers using specialist fibre test equipment.
Tier 1 Fibre Testing – Insertion Loss Testing
Tier 1 testing measures the total amount of signal loss across a fibre link. This confirms whether the fibre has been installed within acceptable performance limits and is suitable for service.
Tier 1 fibre testing allows us to:
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Measure end-to-end signal loss
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Confirm connectors and splices are performing correctly
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Verify links meet expected loss budgets
Tier 1 testing is a key requirement for fibre certification and client handover.
Tier 2 Fibre Testing – OTDR Analysis
Tier 2 testing uses OTDR (Optical Time Domain Reflectometer) technology to analyse the fibre in detail. This provides a clear picture of the fibre link from end to end, identifying individual events along the route.
OTDR testing enables:
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Accurate fault and break location
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Identification of high-loss or reflective events
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Assessment of splice and connector quality
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Verification of fibre length and integrity
Tier 2 testing is ideal for fault finding, complex fibre routes, and high-value fibre networks.
Fibre End-Face Inspection and Cleaning
Dirty or damaged connectors are one of the most common causes of fibre network issues. Before testing, we inspect fibre end-faces to ensure connectors are clean and free from defects.
Where required, professional cleaning is carried out to ensure accurate test results and protect equipment. Clean connections mean reliable performance.
Clear Fibre Test Reports and Certification
Why Choose TNS Comms for Fibre Optic Testing?
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Experienced fibre testing engineers
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Tier 1 and Tier 2 testing capability
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Accurate fault identification
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Clear, client-ready reporting
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UK-wide service coverage
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We also offer advanced fibre characterisation testing CD/PMD/AP
We don’t just test fibre — we help ensure it works properly.
Once testing is complete, we provide clear, easy-to-understand reports that show exactly how the fibre network is performing.
Reports include:
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Insertion loss results
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OTDR traces and analysis
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Pass/fail outcomes
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Identified issues and recommendations
These reports support handover, compliance, and future maintenance.