Using VR and AR to Improve Telecom Network Fault Diagnosis

Relevant case studies

Blog post: 13/10/2026 2:16 pm

Author: Spark Team

Using VR and AR to Improve Telecom Network Fault Diagnosis

Finding a telecommunications fault is rarely as simple as replacing the first component that appears abnormal. Engineers need to interpret symptoms, follow diagnostic procedures, select appropriate tests and progressively isolate the cause.

That makes fault diagnosis an ideal application for immersive technology.

Bespoke Virtual Reality (VR) can expose engineers to many different network faults before they encounter them in the field. Augmented Reality (AR) can then provide equipment-specific diagnostic guidance and access to remote expertise during real investigations.

Why Fault-Finding Training Is Difficult

Routine procedures are comparatively easy to schedule for training. Faults are less predictable.

An engineer may gain substantial experience with common problems while rarely encountering unusual combinations of symptoms. The organisation therefore risks becoming dependent on a relatively small group of highly experienced diagnostic specialists.

VR allows faults to be created intentionally and repeatedly.

Creating a Virtual Fault Library

A bespoke telecoms training platform could contain a library of scenarios covering fibre, cabinets, equipment rooms and 5G infrastructure.

Examples Could Include:

• unexpected optical loss;

• incorrect patching;

• damaged or contaminated connectors;

• poor fibre routing;

• equipment alarms;

• incorrect configuration;

• power-related faults;

• intermittent connections;

• incorrectly documented infrastructure;

• multiple simultaneous symptoms.

The trainee would not initially be told the cause. They would receive only the same information available to an engineer responding to the real incident.

Teaching Diagnostic Thinking

The VR assessment can examine the engineer's reasoning process.

Does the trainee immediately replace equipment, or do they first gather evidence? Do they select the appropriate test? Do they inspect the correct components? Do they interpret results correctly?

Communications-cabling qualifications explicitly include fibre testing alongside installation, termination and splicing, reinforcing the importance of diagnostic and verification skills within competent fibre work.

VR allows these skills to become branching scenarios rather than static questions.

Introducing Time Pressure

Network outages are rarely relaxed environments.

A virtual scenario can reproduce appropriate operational pressure without putting customers or infrastructure at risk. A timer may show the duration of a simulated outage while network alarms and work-order information continue to update.

The purpose is not to encourage rushed decisions. It is to teach engineers how to remain systematic when time matters.

AR During Real Fault Investigations

Once on site, an AR application could help organise information around the asset being investigated.

After identifying the equipment, the engineer might see:

• known alarm states;

• diagnostic flowcharts;

• test-point locations;

• expected values;

• connection diagrams;

• previous maintenance information;

• approved replacement procedures;

• remote-expert options.

AR field-service technology is specifically suited to displaying step-by-step maintenance instructions and diagnostic information in context rather than requiring technicians to repeatedly move between an asset and separate documentation.

Capturing Evidence Through the Workflow

Fault diagnosis often produces useful evidence that can disappear after the repair is complete.

A bespoke AR workflow could prompt engineers to capture photographs, readings, fault codes and observations at defined stages.

This could create a more structured record for engineering teams analysing recurring problems.

Remote Experts for Difficult Cases

Some incidents will still require a specialist.

Instead of immediately travelling to the site, the expert could potentially join through AR remote assistance. They can see what the field engineer sees and guide the inspection while reviewing the same evidence.

Telecommunications tower field-service deployments have already demonstrated AR workflows combining job templates, evidence capture and access to remote experts.

From Individual Experience to Organisational Knowledge

The most experienced fault engineers often possess diagnostic knowledge that is difficult to capture in a conventional manual.

Spark could work with those specialists to turn their decision-making into interactive scenarios.

What do they check first? Which symptoms suggest a particular failure? At what point should an engineer stop, escalate or replace a component?

That expertise can become part of a bespoke VR fault library used to develop the next generation of technicians.

Reducing No-Fault-Found Replacements and Repeat Visits

Better diagnostics can have direct operational value.

If engineers become more systematic, organisations may be able to reduce unnecessary component changes, incomplete repairs and repeated journeys to the same asset.

VR helps develop the diagnostic behaviour before deployment. AR helps engineers apply that process when facing real infrastructure.

Conclusion

Fault diagnosis depends on judgement developed through experience. VR provides a way to accelerate exposure to different faults without waiting for those failures to occur naturally.

AR then brings diagnostic workflows, asset information and remote expertise into the field.

For telecommunications organisations facing skills shortages, complex infrastructure or expensive repeat visits, the combination can turn hard-won fault-finding knowledge into a reusable operational resource.

To explore a bespoke telecoms fault-diagnosis training platform, contact Spark Emerging Technologies.

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