Short answer
Weak office Wi-Fi almost always comes from a single router in a corner, wireless repeaters, and too many devices on one network. The lasting fix: 2–4 access points wired back with cable and placed after a survey, with separate networks for staff, guests and cameras.
Why the signal doesn't reach
The router your internet provider gave you is designed for a flat. Concrete walls, metal doors, shelving and even people absorb the signal, and 15–20 metres from the router speed drops sharply.
Why a repeater isn't the answer
A wireless repeater receives and retransmits on the same channel, so it halves the speed at every hop. It's fine for a corner of a house, not for an office where everyone works in the cloud.
What works
- Wired access points. Each one connects by network cable; laptops switch to the nearest automatically.
- A survey before installation. How many points and where is decided by measuring the signal, not by eye.
- Channels and power set properly. Neighbouring points must not overlap on the same channel.
- Separate networks. Staff, guests and cameras/printers on different networks: a visitor's infected phone can't reach the company server.
- Monitoring. A system that alerts when an access point goes down or is overloaded.
What it costs
For a 100–300 m² office, usually 2–4 access points, a switch and a few hours of cabling. It pays for itself quickly in time no longer lost to dropping connections.
Quick check
- Run a speed test next to the router and in the furthest office.
- If the far office gets less than half the speed, coverage is the problem.
- If it's slow next to the router too, the internet line or the router is the problem.