IT Infrastructure & Cloud
LAN Cable, Fiber Optic, or Wireless for the Office: How to Choose
LAN cable, fiber optic, and wireless are not mutually exclusive choices. Offices generally use all three in different roles, and the split is decided during the site survey.
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5 min read
Short answer: use LAN cable for devices that stay in one place (desktop computers, printers, meeting rooms, wireless access points), fiber optic for the backbone between floors, between buildings, and to the server room, and wireless for devices that move (laptops, phones, guests). A healthy office network almost always uses all three at once.
The question “cable or Wi-Fi?” usually comes up when an office moves, adds a floor, or starts complaining about slow internet even though the subscription was upgraded. The answer is rarely one or the other. What determines how comfortable work is, is how the three share their roles, and that split is decided best from the condition of the building, not from habit.
Comparing LAN cable, fiber optic, and wireless
| Aspect | LAN cable | Fiber optic | Wireless |
|---|---|---|---|
| Used for | Devices that stay in place | Backbone between floors, buildings, and the server room | Devices that move, and guests |
| Distance | Up to about 100 meters per run | Hundreds of meters to kilometers | Depends on walls and obstacles |
| Stability | Stable, not shared with other users on the same run | Most stable, unaffected by electrical interference | Rises and falls with the number of users and signal interference |
| Installation | Run through the ceiling or cable paths to each point | Needs special splicing and termination | Least cabling, but access point positions need to be designed |
When should you use LAN cable?
LAN cable is still the strongest path for work points that do not move. The finance team’s desktop computers, shared printers, meeting room equipment, and CCTV get a stable connection without competing with other users. LAN cable is also what connects every wireless access point to the network, so even an office that is “all Wi-Fi” still needs cable in its ceiling.
The practical limit is about 100 meters per run. Beyond that, the run needs to be split with network equipment in the middle, or replaced with fiber optic.
When should you use fiber optic?
Fiber optic is used for long runs and for runs that carry a lot of traffic at once: from the server room to each floor, between buildings in the same compound, or through areas with a lot of electrical cabling. Because it is unaffected by electrical interference, it is the most stable path for the network backbone.
Installation needs special splicing and termination, so it is usually used only on the main runs, not all the way to each employee’s desk.
When should you use wireless?
Wireless serves devices that move: a laptop carried from a desk to a meeting room, employees’ phones, and guests. Its comfort depends on the design, not on the brand of the equipment: how many access points, where they are mounted, and how many people use one access point at peak hours.
The most common office Wi-Fi problem is not internet speed but too few access points for the number of users, access points mounted behind concrete walls, or one network shared by employees and guests.
How to divide the three during a site survey
A sensible split is usually decided in this order:
- Map the fixed work points. Desks, printers, meeting rooms, and security devices get LAN cable points.
- Decide where the server room or network rack goes. The runs from there to each floor or building become fiber optic candidates.
- Design wireless coverage from the floor plan, wall materials, and estimated users per area, then decide where the access points go.
- Separate the guest network from the employee network from the start.
- Leave spare capacity. Add a few more cable points than today’s needs. Pulling extra cable after the ceiling is closed is far more troublesome.
Common mistakes
Several mistakes repeat in many offices, and almost all of them are cheaper to prevent than to fix:
- Access points placed in just one room, usually near the modem, so rooms at the other end get only a weak signal. Access points should be placed according to where users are, not where the modem is.
- Cables are not labeled. When there is a problem, the technician has to trace cables one by one. Labels at both ends and a diagram of the cable routes save working hours on every repair.
- Network equipment in a hot room without ventilation, for example inside a closed cabinet. High temperatures shorten equipment life and cause hard-to-trace problems.
- One network for everything. Guests, employees, CCTV, and other devices sit on the same network, so one problem device can affect everything, and guest devices can see office devices.
- No documentation. Device passwords, configuration, and diagrams are known only to the technician who installed them. When that technician is not around, the office loses control of its own network.
That is why a handover document, containing the diagram, device list, configuration, and admin access, is just as important as the cables and equipment.
How Legia handles it
In the Office Network Installation service, this split is decided during the site survey, then carried out by Legia’s own technicians, not partners. Firewall and VPN are included in the work, and every installation ends with a handover document. The whole process from survey to handover generally takes 3 to 6 weeks. The service area is all of Indonesia, with priority for Greater Malang and the island of Java.
Frequently asked questions
Is Wi-Fi alone enough for a small office?
For an office with few employees and no important fixed devices, Wi-Fi alone can be enough. Once there is a shared printer, desktop computers, or a meeting room used for video calls, LAN cable points make everything more stable.
Is in-building fiber optic different from fiber internet from a provider?
Yes. Fiber internet from a provider is the connection from outside to your office. In-building fiber optic is your own internal run, for example from the server room to each floor.
Why is Wi-Fi slow when the internet is already fast?
The most common causes are inside the office: too few access points for the number of users, positions blocked by walls, or one network shared by employees and guests. Upgrading the internet plan does not fix any of the three.
Other infrastructure services, including servers and cloud migration, are on the IT Infrastructure & Cloud page.
Does your office server or network need to be set up and looked after? See Legia IT infrastructure and cloud services, or schedule a consultation through the contact page.
