Safe. Reliable. Superior.

We're improving failsafe solutions for railroad transportation.

Industry leader in confined space communications, incorporating technologies such as radiating coax (leaky feeder). Tunnels, mountains, canyons. No matter the rail line, Tunnel Radio signals come through loud and clear.

Railroad Systems & Technology

Discover more about our all-in-one solutions.
Fiber Optic Expansion System

Fiber Optic Expansion System

Tunnel Radio’s fiber optic (FO) solution provides scalable and seamless connectivity under all conditions, especially for expansive operations.
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Tunnel Voice FD4 from Tunnel Radio

Tunnel Voice

Unbroken simplex or duplex operation through the longest tunnels and most remote passes. All within the AAR 160 MHz band. Plus, Tunnel Voice is compatible ...
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Positive Train Control (PTC) from Tunnel Radio

Positive Train Control (PTC) 220MHz System

Extend the 220 MHz signal through any length of tunnel or mountain pass, meaning you never lose sight — or control — of your trains.
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Distributed Power Communication Systems from Tunnel Radio

Distributed Power Railroad Communication

Our network of amplifiers and distributed antenna cable extends the distributed power and end-of-train/head-of-train radio signals, keeping your systems connected from portal to portal.
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TRCentral Remote Monitoring System from Tunnel Radio

TRCentral Remote Monitoring System

TRCentral makes data on system performance, troubleshooting, and other information easily accessible through local networks or online remotely.
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Remote Access features from Tunnel Radio

Remote Access

Control communications from anywhere via web-based software.

Support features from Tunnel Radio


Our support team is ready to help. Any day, any hour. Onsite, by phone or online. It’s that simple.

Quick Installation features from Tunnel Radio

Quick Installation

Downtime equals money lost. We’ll fast-track your project from Day One.

Distributed Antenna System features from Tunnel Radio

Distributed Antenna Systems

Advanced wireless technology improves read, reliability and versatility in underground operations.

Fully featured solution with proven reliability

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Built to perform — everywhere
Tunnel Link railroad technology for distributed power and positive control is the industry leader. Built to last in harsh and remote environments, Tunnel Link™ and Tunnel Voice™ mobile radio systems are performance-proven in even the longest, deepest railroad tunnels.

No dead spots
The Tunnel Link™ data system is designed to extend radio signals generated by Distributed Power, HOT/EOT data equipment, and VHF Positive Train Control systems. Our Tunnel Link bi-directional amplifiers maintain an appropriate signal level while using a single repeater for all processes, ensuring a constant connection.

Customized engineering
Tunnel Radio’s in-house RF experts have the know-how to create customized engineering solutions with a global record of excellence designing and building critical railroad communications and train management components. Nobody knows RF better than Tunnel Radio.


Whatever you decide to do next, you’ll be impressed with our approach to assessing your needs and our on-target, cost-efficient recommendations. We guarantee it.