Office Wi-Fi keeps dropping: a plain-English troubleshooting guide

Short answer. Office Wi-Fi that keeps dropping is almost always one of five things: the broadband itself, a consumer-grade router asked to serve an office, interference from neighbours or appliances, extenders creating a second flaky network, or one misbehaving device flooding the connection. Work out which by testing on a cable first, then fix in that order. The permanent fix for most small offices is business broadband, a proper router, and one or two wired access points.

This is the question I get from businesses that have “had a few Wi-Fi problems” for two years. It is fixable, and the fix is not exotic.

Step one: is it the Wi-Fi or the broadband?

Plug a laptop into the router with a cable and use it for an hour. If it drops too, the problem is the broadband line or the router, and no amount of Wi-Fi fiddling will help; ring the provider and ask them to test the line. If the wired laptop is rock solid, the problem is wireless and the rest of this post applies.

Also check the obvious: when did it start, does it affect everyone or one desk, is it a time of day. “Every day at midday” points at the microwave in the kitchen. “Only the far office” points at range. “Since the new phones arrived” points at load.

Cause one: the router the broadband company sent

The free router that arrived with the broadband is built for a family: a couple of laptops, a TV, some phones. An office of twenty people brings forty devices, a printer, a door entry system and three video calls at once. The router’s wireless radio runs out of capacity, drops the oldest connections, and the cycle repeats every few minutes.

The fix is to stop using that box for Wi-Fi. Keep it as the modem if you must, put a proper business router or firewall behind it, and serve the wireless from dedicated access points. That is a few hundred pounds of equipment for a small office and it ends the daily drop-outs in most cases.

Cause two: interference

Wi-Fi shares the air with everything else on the same frequencies:

• Neighbouring networks in a shared building, all on the same channel.
• Microwave ovens, which sit right in the 2.4GHz band. Lunchtime drop-outs are a giveaway.
• Cordless DECT phones and some Bluetooth devices.
• Thick walls, foil-backed insulation and metal shelving, which block signal rather than interfere with it.

Fixes: move devices onto the 5GHz band (or 6GHz if your equipment supports Wi-Fi 6E), choose a channel your neighbours are not on, and position access points centrally with line of sight to desks rather than in a cupboard by the door.

Cause three: extenders and second routers

Well-meant, nearly always wrong. A wireless extender halves the speed of everything through it, and it creates a second network with the same name. Laptops then cling to the extender long after they have walked into the strong signal of the main router, because devices are slow to let go. The result is an office where the Wi-Fi “works” but feels broken.

A second consumer router plugged in for the back office does something similar and adds a second set of IP addresses, which breaks printers and shared devices in interesting ways.

Replace both with access points connected by cable to the main network. They present one seamless network and hand devices between themselves properly.

Cause four: one device flooding the network

A single laptop uploading a backup, a security camera streaming to the cloud at full resolution, or a phone doing a 10GB update can saturate a small connection and make it feel like the Wi-Fi is dropping for everyone. A business router shows you per-device usage. Consumer routers mostly do not, which is another reason to replace them.

Cause five: the broadband itself

If the wired test showed drops, or the speed is simply not enough for the number of people, the line is the issue. Two things worth knowing:

• Business broadband is not just a price. It usually brings a fixed IP address, a defined repair target, and a support line staffed by people who can actually test the line. Home packages come with neither.
• A 4G or 5G failover in the router means a line fault becomes a slower afternoon, not a day off. For a business that stops when the internet does, it is cheap insurance.

What a properly set up small office looks like

For a typical 10 to 30 person office:

1. Business broadband, full fibre if available, with a 4G or 5G backup.
2. A business-grade router or firewall doing the routing, not the provider’s box.
3. One or two ceiling-mounted access points on cables, positioned for coverage, running one network name across both bands.
4. A separate guest network so visitors and personal phones are kept away from the printers and the file server.
5. Wired connections for anything that does not move: printers, desktops, phones, the TV in the meeting room.

That setup, installed and configured, is typically a one-day job and a low four-figure spend, and it removes a daily irritation that costs far more in lost time.

When to call someone

If the wired test is clean and the fixes above are beyond what you want to spend an afternoon on, this is bread-and-butter managed IT work and a common first project for a new client. Bring the drop-out pattern (when, where, who) to a 30-minute call and I can usually tell you the cause on the call.