The basic path: from the street to your modem

Fiber optic internet installation starts with a cable that runs from your internet provider's network to your home — usually buried underground or strung on poles along your street. A technician digs or routes that cable to your house, runs it inside to a central point (often near where your electrical panel is), and connects it to a small box called an optical network terminal (ONT). That ONT converts the fiber signal into electrical signals your modem and devices can use. The whole process typically takes two to four hours for a standard residential installation.

The reason this matters is that fiber requires different equipment than cable or DSL internet. Your old modem will not work with fiber. The provider installs the ONT for you — you do not buy it — and then you either use a modem they provide or buy your own compatible modem if your provider allows it.

Key Takeaways

  • A technician runs fiber cable from the street to your home, either underground or overhead, and installs an optical network terminal (ONT) inside your house to convert the signal.
  • The ONT is provided by your internet provider and is not something you purchase; it stays their property even after installation.
  • Installation usually takes two to four hours and requires access to your home's exterior and interior walls or conduit.
  • If fiber has not yet reached your street, the provider must first build out the network in your area, which can take months and may require a construction crew to dig trenches.
  • You will need a new modem compatible with fiber; your old cable or DSL modem will not work with the ONT.

What happens before the technician arrives

Before installation, your provider checks whether fiber already runs to your address. If it does, scheduling is straightforward — you book an appointment and a technician comes to your home. If fiber has not reached your street yet, the provider's engineering team plans the route, estimates the cost, and schedules a construction crew to lay the cable. This phase can take weeks or months depending on how far the nearest fiber line is and whether the work requires digging through private property or coordinating with utility companies.

You will receive a call or email confirming your installation date. The technician will ask whether you want the cable run underground (buried in a trench) or overhead (attached to poles). Underground is less visible but more expensive and takes longer because it requires digging. Overhead is faster and cheaper but more visible. Some neighborhoods restrict overhead lines, so your options may be limited by local rules.

Running the cable to your home

On installation day, the technician locates the fiber line nearest to your home — usually in the street or on a utility pole. They then run a new cable from that point to your house. If you chose underground, they dig a shallow trench (usually 12 to 18 inches deep) from the street to your home's foundation. If you chose overhead, they attach the cable to existing poles or install a new pole if needed.

The cable enters your home through a small hole drilled in your exterior wall, typically near your foundation or where utilities already enter. The technician will ask you to choose the entry point — usually somewhere inconspicuous like the back of the house or near the garage. Once inside, the cable runs along your walls (often through existing conduit or stapled to the wall) to the location where you want the ONT installed. Most people choose a utility closet, garage, or the room where their router will be.

Installing the optical network terminal and testing

The ONT is a small box about the size of a paperback book. The technician mounts it on a wall or shelf, connects the fiber cable to it, and plugs it into a power outlet. The ONT has lights on the front that indicate whether the connection is working — usually a green light means the signal is good. The technician then runs an ethernet cable from the ONT to your modem (or directly to a device if you are using the ONT's built-in router, which some providers offer).

Once everything is connected, the technician tests the connection to make sure you are getting the speeds you paid for. They will run a speed test on their equipment and show you the results. If something is wrong — a loose connection, a signal problem, or an issue at the provider's end — they troubleshoot it before they leave. This testing phase usually takes 15 to 30 minutes.

What you need to do to prepare

Clear the area where the technician will work, both outside and inside your home. If you chose an outdoor entry point, make sure the technician can access it — move trash cans, garden hoses, or parked cars out of the way. Inside, clear the space where the ONT will be installed so the technician has room to work and can mount the box securely.

Decide in advance where you want the ONT and where you want your modem or router. The ONT needs to be near a power outlet, and you will want your modem or router in a central location so the wireless signal reaches all your rooms. If the ONT and modem are in different rooms, the technician will run an ethernet cable between them — ask them to run it through walls or conduit if possible so it is not visible.

You do not need to do anything technical before the technician arrives. They handle all the configuration. However, if you are using your own modem instead of one provided by the provider, have it ready and tell the technician you plan to use it — they will need to know this before they set up the connection.

After installation: what the equipment does

The ONT converts the fiber signal (light traveling through glass) into electrical signals that your modem understands. Your modem then converts those signals into a form your devices can use — either through an ethernet cable for a wired connection or through a wireless router for Wi-Fi. The ONT itself does not broadcast Wi-Fi; it is just the translator between the fiber line and your modem.

The ONT will have lights indicating the status of your connection. A steady green light usually means everything is working. If a light is red or blinking, it signals a problem — either with the fiber line, the ONT itself, or the connection between them. The technician will explain what each light means before they leave, and you can refer to that information if you ever need to troubleshoot.

Common reasons installation takes longer than expected

If fiber does not yet run to your street, the provider must build the network first. This involves surveying the route, getting permission from property owners if the cable crosses private land, coordinating with utility companies to avoid hitting existing lines, and then digging trenches or installing poles. This phase can take several months depending on the distance and complexity.

Even when fiber is already in your area, installation can be delayed if the technician encounters obstacles — a wall that is too thick to drill through, conduit that is already full, or an entry point that does not work for some reason. If this happens, the technician will discuss alternatives with you (like running the cable overhead instead of underground, or choosing a different entry point) and may need to schedule a second visit if the solution requires more time.

Frequently Asked Questions

Do I have to let the technician drill a hole in my house?

Yes, the fiber cable needs to enter your home somehow. The hole is small (usually less than half an inch in diameter) and the technician will seal it with caulk after running the cable through. If you own your home, you have the final say on where the hole goes. If you rent, check your lease or ask your landlord first — most landlords allow it since it increases the property's value.

Can I choose where the ONT goes inside my house?

Yes. The ONT needs to be near a power outlet and ideally in a central location so ethernet cables can reach your modem or router without running across the entire house. A utility closet, garage, or basement is common. The technician will work with you to find the best spot.

What if I do not like where the cable enters my house?

Tell the technician before they start drilling. They can usually choose a different location — the back of the house instead of the front, higher or lower on the wall, or a different side of the house entirely. The only constraint is that the entry point needs to be reachable from the street without the cable running across a neighbor's property.

Will the technician set up my Wi-Fi for me?

The technician will connect the modem to the ONT and test the connection, but setting up your Wi-Fi network (choosing a password, naming your network, connecting your devices) is usually your responsibility. The technician can show you how to do it or do it for you if you ask, but it is not always included in the standard installation. Ask when you schedule your appointment.

What happens if the fiber line is damaged after installation?

Contact your internet provider when ready. If the damage is outside your home (on the street or on a pole), the provider's crew will repair it at no cost to you. If the damage is inside your home (like you accidentally cut the cable), you may be charged for the repair. The provider's technician can usually fix it in one visit.