Fiber is the strongest business connection wherever you can get it: the most capacity, symmetrical speeds on dedicated circuits, low and steady latency, and the best SLAs. Fixed wireless is a radio link from your roof to a provider's hub that can go in quickly and often carries a business SLA. 5G fixed wireless access runs over a mobile carrier's cell network, so it is fast to set up and easy to try, but the capacity is shared and performance moves around during the day. Plenty of businesses end up with two of the three: fiber as the primary, and a wireless link as the backup or as a bridge while fiber is built.
All three get sold as "business internet," sometimes on the same quote. They are engineered very differently, and the differences land exactly where a business feels them: upload speed, behaviour in bad weather, whether anyone has promised you anything in writing, and how long you wait to get connected.
The three side by side
| Fiber | Fixed wireless | 5G fixed wireless access | |
|---|---|---|---|
| How it reaches you | Glass cable into the building | Radio link from an antenna on your roof to a provider hub, with line of sight | A receiver in a window or on the wall, talking to the nearest cell sites |
| Upload vs download | Symmetrical on dedicated circuits | Often symmetrical, depending on the product | Usually a much smaller upload than download |
| Latency | Low and consistent | Low on a well-built link | Higher and more variable |
| Weather | Not affected | Heavy rain can weaken higher-frequency links | Signal indoors matters more than weather |
| Shared or dedicated | Either: DIA is dedicated, PON fiber is shared | Either: point-to-point is dedicated, point-to-multipoint is shared | Shared with phones and other users on the cell |
| Written SLA | Standard on DIA | Common on business products | Rare |
| Static IPs and inbound access | Standard | Usually available | Often not, or only as an add-on |
| Typical install | 2–4 weeks in a lit building, 60–90 days with construction, days for shared fiber already in the building | Depends on roof rights and a line-of-sight survey; often quicker than fiber construction | Often days |
Fiber: what you are paying for
Capacity and consistency
Light in glass is not bothered by rain, radio interference or a crowd at the stadium down the road. A fiber circuit delivers the same performance on a Tuesday morning as on a Friday afternoon, and it scales a long way: a dedicated fiber port can run from 100 Mbps up to 100 Gbps, and an upgrade is often a configuration change rather than a new install.
Dedicated or shared
Fiber comes in two very different commercial forms. Dedicated Internet Access gives you your own uncontended port, symmetrical speed and an SLA with teeth. Shared fiber runs over a passive optical network you split with other customers, is sold on "up to" speeds and is usually supported on a best-effort basis. Both are fiber. Only one comes with a promise.
The catch is availability
Fiber is only an option if a carrier can reach your building. Where one is already lit inside, installs are quick and competition keeps prices sensible. Where none is, someone has to build a lateral from the street, which means a construction charge and a longer wait. That is why two buildings on one block can have very different options; we explain it in why prices vary by building.
Fixed wireless: fiber-like service without digging
How it works
A fixed wireless provider mounts a small antenna on your roof or upper facade and aims it at a hub site, usually on a taller building or tower that is itself connected to fiber. Two designs are common. Point-to-point links serve one customer with a dedicated radio path. Point-to-multipoint links serve several customers from one hub antenna, which makes them cheaper and means the capacity is shared.
Some links use licensed spectrum, which the provider has the exclusive right to use in that area, so interference is controlled. Others use unlicensed bands that anyone can use, which is cheaper but more exposed to congestion from other radios. Ask which one you are getting.
Line of sight and roof rights
The antenna needs a clear line of sight to the hub. A new building going up across the street can block a link that worked for years, so ask the provider how it handles that. You also need permission to put equipment on the roof, which means a conversation with your landlord and sometimes a roof rights fee. Cable has to run from the roof to your suite, usually through the riser.
Weather
Radio signals at higher frequencies are weakened by heavy rain, an effect engineers call rain fade. A well-designed link carries enough signal margin to ride through the rainfall typical for its location, and the provider should be able to tell you the availability the link was designed for. Clear-weather speed tests say nothing about a thunderstorm.
Where it fits
Fixed wireless earns its place in three situations: a building where no carrier is lit and construction would take months, a site that needs a backup on a completely different physical path from its fiber, and a temporary or fast-moving project where waiting 90 days is not an option.
5G fixed wireless access: fast to start, variable to live with
How it works
5G fixed wireless access uses the same cell sites that serve mobile phones. A gateway in your office connects to the network and presents an ordinary Ethernet or Wi-Fi connection to your devices. There is no roof work and often no technician at all: a box arrives and you plug it in.
Why performance moves around
The capacity of a cell sector is shared among everyone using it, phones included. When the site is busy, everyone gets less. Some plans also state that fixed wireless traffic may be given lower priority than mobile traffic when a site is congested, so read the network management terms. Where the gateway sits matters a great deal: a unit by a window on a high floor can perform very differently from the same unit in an interior room.
Inbound connections are the hidden problem
Many 5G plans put customers behind carrier-grade NAT, which means you share a public IP address with other customers and nothing on the internet can start a connection to you. Web browsing and outbound VPN tunnels work fine. A VPN server, a camera system viewed from outside, or anything a vendor needs to reach at a fixed address does not. If you need static IPs, confirm they are available on the plan before you buy.
Where it fits
5G is useful for pop-up and temporary sites, construction trailers, very small offices, and as a backup where the building has no second wired option. As the only connection for an office that lives on video calls, it is a gamble, mostly because of the upload. Our guide to symmetrical vs asymmetrical internet shows why that matters.
A worked example
Hypothetical scenario with invented numbers, to show how the three can be combined. It is not a quote or a real client.
A 40-person distributor signs a lease on a warehouse and office building with no lit carrier. The nearest fiber carrier quotes a lateral with a construction charge and a 90-day timeline. The team moves in five weeks from now, and the business estimates that every hour offline costs it about $1,500 in stalled orders and idle staff.
| When | What happens | What the office runs on |
|---|---|---|
| Week 0 | Fiber ordered; landlord signs roof rights for a fixed wireless link | Nothing yet |
| Week 5 (move-in) | 5G gateway shipped and plugged in | 5G only: fine for email and browsing, weak for video uploads |
| Week 7 | Fixed wireless link installed after the line-of-sight survey | Fixed wireless as primary, 5G as backup |
| Day 90 | Fiber lateral completed and DIA circuit turned up | Fiber primary, fixed wireless backup; 5G cancelled or kept for a storeroom |
At an invented $1,500 an hour, even a single four-hour outage costs $6,000, which is why the business keeps the fixed wireless link after fiber arrives. It shares no conduit, street or building entrance with the fiber, so a backhoe that cuts one leaves the other running. The 5G gateway did its job as a bridge and may not be worth keeping.
How to choose
- Fiber lit in your building and downtime is expensive: dedicated fiber, and put a wireless or coax backup under it.
- You host anything or need fixed addresses: fiber or fixed wireless with static IPs. Avoid plans that use carrier-grade NAT.
- Heavy uploads, video all day, cloud backups: rule out asymmetric 5G as your primary.
- No fiber, but roof access and a clear view to a hub: fixed wireless, possibly as the permanent answer.
- A site that exists for months, not years: 5G, and do not sign a long contract for it.
- Picking a backup: choose whichever option shares the least with your primary. For a fiber office, wireless is often the best-separated path available, and coax is worth checking too.
Wireless as a backup: check what it really shares
A wireless backup is attractive precisely because it does not enter the building through the same hole in the wall as your fiber. Two details still deserve a question. First, a fixed wireless hub is itself fed by fiber somewhere, and if that feed belongs to the same carrier as your primary, an outage deep in that carrier's network could hit both. Second, the radio on your roof runs on building power, so a power failure takes it down unless it sits on a UPS. Failover between the two is usually handled by SD-WAN or a dual-WAN firewall. The broader design is covered in does your business need backup internet.
Questions to ask your provider
- For fiber: are you already lit in this building, or does this need construction? What is the install date in writing?
- For fixed wireless: is the link point-to-point or point-to-multipoint? Licensed or unlicensed spectrum? What availability was the link designed for, given local rainfall?
- For fixed wireless: what happens if a new building blocks the line of sight? Who arranges roof rights?
- For 5G: what are the upload speeds at my address, not the headline figure? Is fixed wireless traffic deprioritised when the cell is busy?
- For 5G: do I get a public static IP, or am I behind carrier-grade NAT?
- For any of them: is there a written SLA, what does it cover, and what is the committed repair time?
Getting the right mix for your address
The right answer depends on your building more than on the technology. We check which carriers are lit at your address, what construction would involve, and whether a wireless path makes sense as a bridge or a backup, then Tier 1 carriers bid and we bring back the best offer. The carrier pays us, so the invoice is not marked up, and the quote is free with no obligation. Send us your address, call 478-758-8091 or text (347) 870-0965. We usually respond the same day.
