Posted by 2WayRadioHub on 21st Jun 2025
Voices in the Tunnel: How CARRBORG Radios Kept the Team Connected Underground
Beneath the city’s surface, 60 feet below, the Jackson Avenue Tunnel Project was in full swing. Excavators hummed. Dust hung thick in the air. And every movement depended on one thing—communication.
Site supervisor Miguel had one golden rule: “No blind moves.”
In an environment where visibility was limited and timing was everything, crew members relied on walkie-talkies to coordinate.
But as the tunnel grew deeper, so did the problems.
The Static that Nearly Stopped Everything
Halfway through segment two, a hauling crane jammed after misaligned instructions from a crew member working around a corner.
Turns out, the old UHF radios couldn’t penetrate the dense concrete layers, and interference was disrupting nearly every instruction.
That delay cost them three hours, $10,000 in idle equipment, and nearly injured a technician.
The Game-Changer: CARRBORG Encrypted 4G Radios
After the incident, Miguel introduced the CARRBORG S959 Pro Dual-Mode Radios, designed for critical environments like tunnels, subways, and high-interference sites.
✅ 4G LTE connectivity allowed seamless communication, even below ground—by bouncing off multiple nearby networks.
✅ AES-encrypted channels ensured that instructions couldn’t be intercepted or lost in background noise.
✅ Dual-mode POC + traditional two-way fallback offered fail-safe communication even if LTE was spotty.
Suddenly, from the drilling head to the top crane operator, every voice was loud and clear—and safe.
“It’s Like We’re Talking Across the Street”
“When you're underground, you don't get a second chance,” Miguel said.
“These radios turned our risky guesswork into synchronized teamwork.”
Your Jobsite Deserves More Than Static
Whether you're running tunnel excavations, mine operations, or dense urban builds, don’t risk downtime or danger.