GAITHERSBURG, Md. - TelAve -- A September 21 telecommunications failure that disrupted thousands of flights across the northeastern United States highlights a challenge for critical infrastructure operators: understanding where physical connections run, how systems depend on them, and what happens when backup communications fail.

Graphical Networks, developer of the netTerrain infrastructure management platform, has published a technical analysis examining the incident and lessons for airports, telecommunications providers, government agencies and enterprise networks.

When the Backup Connection Fails

According to FAA statements reported by Reuters, problems with a primary telecommunications circuit prompted a transition to a backup fiber connection serving a Philadelphia-area air traffic control facility.

The following day, construction activity in New Jersey accidentally severed the backup line, disrupting air traffic across major East Coast airports.

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The incident raises a question extending beyond aviation: How well do organizations understand the physical infrastructure supporting their redundant connections?

Why Network Visibility Matters

Communications networks can encompass thousands of fiber strands, underground routes, splice points, conduits and interconnected systems. Even when redundancy exists, physical dependencies may not be immediately apparent.

Infrastructure teams need answers:

• Where do primary and backup fiber connections travel?
• Do independent connections share vulnerable routes?
• Which systems depend on particular cables and circuits?
• Can engineers quickly trace affected connections?

Accurate documentation cannot prevent every cable cut. It can support better vulnerability assessments, troubleshooting, planning and recovery.

Lessons for Critical Infrastructure

Graphical Networks' netTerrain platform helps organizations visualize physical and logical infrastructure, including fiber routes, individual strands, splices and circuit relationships.

At Baltimore/Washington International Thurgood Marshall Airport, netTerrain supports network documentation across airport facilities. According to a Graphical Networks customer account, the airport reduced circuit-documentation time from approximately 30 minutes to less than one minute.

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BWI was not involved in the FAA incident. Its experience demonstrates a practical application of infrastructure visibility.

Understanding the FAA Fiber Cut

Graphical Networks' analysis examines the documented failure sequence, opportunities for resilience planning, and lessons for infrastructure operators.

Read the analysis:

https://graphicalnetworks.com/blog-why-did-an-faa-fiber-cut-disrupt-so-many-flights-a-closer-look-at-what-went-wrong/

About Graphical Networks

Graphical Networks develops netTerrain, an infrastructure management platform combining network documentation, data center infrastructure management (DCIM), and outside plant (OSP) fiber management. Its software helps organizations visualize connectivity, trace infrastructure relationships and maintain accurate network records.

https://graphicalnetworks.com/

Media interviews and technical inquiries are welcome.