Telecom and control cable testing solutions

Q: What are the common types of faults in telecom and control cables?

Common faults include:Open circuits – breaks in the conductor causing signal lossShort circuits – conductors touching each other or groundIntermittent faults – sporadic issues from moisture or loose connectionsInsulation faults – degraded insulation allowing leakage or interferenceMoisture ingress and corrosion – common in older or poorly sealed cablesThese faults can cause performance drops, signal loss, or complete service failure.

Q: What methods are typically used to locate cable faults?

Engineers use a combination of the following methods:Time Domain Reflectometry (TDR): Detects and pinpoints faults by analysing reflected signalsResistance Testing: Measures continuity, open circuits, or shortsInsulation Resistance Testing (e.g. using a Megohmmeter): Identifies insulation breakdownsTone Generators & Tracers: Useful for physical location and identification of specific cablesChoosing the right method depends on the fault type and cable system.

Improve network uptime with telecom and control cable testing tools built for the field. From TDRs to copper testers, Megger solutions help you locate faults, trace routes, and maintain telecom infrastructure with speed and precision.

Megger’s telecom and control cable testing tools are built to help you locate faults faster, diagnose intermittent issues, and keep services online. Whether you’re working with legacy copper, complex multi-core cables, or long underground runs, our range is tailored for the real challenges telecom professionals face.

From high-resolution TDRs and cable fault locators to copper wire and insulation testers, each tool delivers pinpoint accuracy and safe, non-destructive testing. Rugged, portable, and easy to use in the field, Megger solutions reduce guesswork, shorten repair times, and help you restore critical connectivity with confidence.

Get a quote

All Cable fault location, testing, and diagnostics Cable testing and diagnostics Cable tools Portable cable fault locating systems Telecom & control cable testing solutions Cable test van VLF withstand testing

Purpose-built for telecom and control cable testing

Telecom and control systems present real-world challenges: intermittent faults, signal-sensitive cables, and complex, multi-conductor arrangements. Megger tools are designed for these environments. They use low-voltage, non-destructive test methods to protect delicate infrastructure while delivering accurate fault location, even within bundled or twisted-pair cables. With advanced capabilities to detect hard-to-isolate faults - like moisture ingress, corroded joints, or transient failures - you’ll resolve issues faster and with confidence. Every tool is designed with input from telecom professionals to suit the systems you work with every day.

130+ years of field-proven expertise

At Megger, we’ve been supporting engineers in the field for over 130 years. Our history isn’t just about longevity, it’s about experience. We’ve evolved alongside telecom infrastructure, creating tools shaped by decades of real-world use and user feedback. Every instrument is backed by a deep understanding of cable behaviour, fault types, and the environments you work in - from damp basements to roadside cabinets. That’s why telecom engineers around the world trust Megger for reliable test results, rugged build quality, and expert advice - today and long into the future.

Reliable performance, wherever you’re working

Telecom work doesn’t happen in perfect labs. It happens in the rain, on rooftops, underground, or in roadside cabinets. Megger tools are built for the field: rugged, weatherproof, and ready for the harsh conditions that come with real cable testing. Many instruments are fully battery-powered, giving you the freedom to work in remote or difficult-to-access locations with no mains supply. Each device is compact, easy to carry, and quick to set up - so you spend less time preparing and more time finding and fixing faults.

Pinpoint accuracy for faster fault resolution

Accurate measurements matter, especially in bundled or buried cables where guesswork leads to wasted time and disruption. Megger telecom testing tools deliver the precision needed to isolate faults quickly and safely, even in complex installations. Whether you're tracking down an insulation issue, locating a partial short, or confirming a clean line, our instruments give you reliable, repeatable results. That means fewer false positives, minimal unnecessary digging or cable movement, and faster network recovery. When performance matters, precision pays.

Frequently asked questions

What are the common types of faults in telecom and control cables?

Common faults include:

Open circuits – breaks in the conductor causing signal loss
Short circuits – conductors touching each other or ground
Intermittent faults – sporadic issues from moisture or loose connections
Insulation faults – degraded insulation allowing leakage or interference
Moisture ingress and corrosion – common in older or poorly sealed cables

These faults can cause performance drops, signal loss, or complete service failure.

What methods are typically used to locate cable faults?

Engineers use a combination of the following methods:

Time Domain Reflectometry (TDR): Detects and pinpoints faults by analysing reflected signals
Resistance Testing: Measures continuity, open circuits, or shorts
Insulation Resistance Testing (e.g. using a Megohmmeter): Identifies insulation breakdowns
Tone Generators & Tracers: Useful for physical location and identification of specific cables

Choosing the right method depends on the fault type and cable system.

What makes Megger TDR tools suitable for telecom cable testing?

Megger TDRs are purpose-built for telecom and control cable systems. They offer:

Sub-meter or centimetre-level accuracy for pinpoint fault location
User-friendly interfaces with clear visual displays
Non-destructive testing, ideal for delicate or aged cables
Rugged, battery-powered designs for reliable field use

They’re trusted by telecom professionals worldwide for their speed, precision, and durability.

Can Megger tools detect intermittent or hidden faults?

Yes. Many Megger tools are designed to detect hard-to-find faults, including intermittent or transient issues. Advanced TDRs and analysers can capture brief anomalies in signal behaviour, caused by loose connections, moisture ingress, or temperature-related cable faults. This helps technicians locate elusive issues before they lead to major failures.

Cable fault? We'll help you track it down.

Buried cables. Mixed bundles. Intermittent errors. If the fault’s hiding, we’ll help you find it.

Our team has decades of telecom testing experience and knows how to match the right tool to the right job. We’ll help you cut through the noise -literally - and get your network back online faster.

Solve it with Megger