If you've ever come home to find a cluster of little colored flags along your curb, or watched a crew with a directional drill working their way down the block, you've probably had one of two reactions: mild curiosity, or mild annoyance that someone's tearing up your street. Fair enough. But what's actually happening underground is worth understanding, because what they're laying down is the physical foundation of your Internet connection.
Fiber optic cable doesn't look like much. It's thin, flexible, and usually color-coded — often bright orange, yellow, or black on the outside. Inside, it's carrying light, not electricity. The actual glass strands transmitting your signal are roughly the diameter of a human hair. The cable that houses them isn't much bigger than a garden hose. For something that can deliver symmetrical gigabit speeds to your entire home, it's surprisingly unassuming.
The cable itself is tough, but it doesn't go straight into the dirt. It runs through conduit, a rigid or flexible plastic pipe that protects it from moisture, shifting soil, and the occasional ambitious landscaper. That conduit is typically buried at least 18–24 inches below the surface, sometimes deeper depending on local code and terrain.
Along the way, fiber networks include underground handholes (small vaults close to the ground). Inside those vaults, you'll find splice enclosures: sealed, padded housings that protect the points where fiber cable sections are joined together. It's more delicate work than it sounds. Fiber splices require precise alignment down to the micron, so keeping them sealed and stable matters.
Those colored flags in your yard mark buried utilities so crews know what's already down there before they dig. Orange means telecom or cable. Blue is water. Yellow is gas. If you're seeing a mix before an install, that's 811 "call before you dig" markings, which are required before any excavation.
You might also notice small green or gray pedestals on the street or at the edge of a property. Those are junction points: places where the underground network branches out toward individual homes. And on the home itself, the fiber terminates in an ONT enclosure (Optical Network Terminal): a small weatherproof box mounted on the exterior wall, with conduit running up from the ground. Inside that box is the device that converts the light signal from the fiber into an ethernet signal your router can actually use. It's the last stop before the Internet becomes yours.
Ting buries fiber underground wherever possible. It's more work upfront, but the tradeoff is straightforward: underground cable is protected from wind, ice, falling branches, and the general chaos of weather. Fewer physical vulnerabilities means fewer outages. That said, aerial installs, fiber strung on utility poles, are sometimes the right call depending on geography and what infrastructure already exists in a given area.
Either way, the goal is the same: get a reliable signal to your home and then get out of the way. That's kind of the whole point. The best Internet infrastructure is the kind you never have to think about because it just works.
Curious whether Ting fiber has made it to your street yet? Check your address to find out.