"The internet is slow" is one of the most common complaints in any office. Very often the line is fine and the problem is the Wi-Fi. A wireless network set up in a hurry, with the provider's router and an extender or two, does not hold up for long as users and devices grow. Here are the seven mistakes we see most often.
1. The router is hidden in a corner
The router usually goes wherever the provider's line comes in: in a cupboard, behind the reception screen or on the floor of the accounts office. Metal cabinets, concrete walls and fridges weaken the signal a lot. The furthest rooms get very little signal or none at all.
The answer is not to move the line, but to separate the router's job from the Wi-Fi's job. The router stays in the rack or cabinet, and Wi-Fi comes from access points placed high up in central spots, usually on the ceiling.
2. Extenders instead of access points
Wireless extenders are cheap and easy, but they receive and resend the same signal. This lowers the real speed and adds delay. Devices often stay "stuck" to a distant point instead of moving to the nearest one.
In an office, the reliable answer is access points with an Ethernet cable and PoE power from the switch. If a cable cannot be run, a business-grade mesh system is a better choice than extenders.
3. One network for everyone and everything
Staff, guests, cameras, printers and smart devices often join the same network with the same password. That way a guest's phone can see the server with your files, and a vulnerable camera can become a way into the network.
- A separate SSID for staff, on its own VLAN.
- A guest network isolated from the internal network, with a speed limit.
- A separate VLAN for cameras, printers and IoT devices.
4. Wrong channels and channel width
On 2.4 GHz there are only three channels that do not overlap: 1, 6 and 11. If your access points and your neighbours' networks sit on channels in between, or use 40 MHz width, they interfere with each other and speed drops. On 5 GHz there are many more channels, but planning is still needed.
Set 2.4 GHz to 20 MHz and let modern devices prefer 5 GHz or 6 GHz where supported. On networks with several access points, a controller that assigns channels and power automatically makes a big difference.
A free Wi-Fi analyser app on your phone shows how many networks are around you and on which channels. If yours share a channel with five neighbouring networks, you have found one cause of the problem.
5. Weak security
The same Wi-Fi password since day one, written on a note at reception, is known to former staff as well. WPS is often still on, or the router's admin password is the default. All of these are open doors.
- Use WPA3 or, if not all devices support it, WPA2/WPA3.
- Turn off WPS.
- Change the admin password on the router and access points.
- Change the staff password when someone leaves, or use personal accounts (WPA2/WPA3 Enterprise).
6. Home equipment in a business space
A home router is designed for a few devices. In an office with twenty computers, phones, printers and cameras, it quickly reaches its limits. The symptoms are familiar: dropouts, slow video calls and restarts "to sort it out".
Business equipment, for example from MikroTik, TP-Link Omada or Cisco, supports more users, VLANs, central management and smooth roaming from one access point to the next. It does not have to be expensive, as long as it fits the size of the space.
7. No survey, no maintenance
Many networks are set up without a coverage survey and then nobody touches them for years. But the space changes: new offices, new partitions, more devices. The firmware goes without updates and security holes stay open.
- Do a coverage survey (site survey) before installation and after every major change to the space.
- Update the firmware on the router and access points regularly.
- Keep documentation: where each access point is, which port it connects to, which VLANs exist.
- Every few months, check the logs and the devices that connect.
Before you buy new equipment, measure the speed with a cable next to the router. If it is right there and poor on Wi-Fi, you know the fix lies in the wireless network and not in the line.
How we help
CyberSpace Dynamics designs and installs wireless networks for offices, shops and warehouses. We start with a site visit and coverage survey, run structured cabling where needed, mount access points with PoE and set up VLANs and a guest network.
At the end we hand over documentation and passwords, so the network is yours. If you like, we also take care of regular maintenance, so your Wi-Fi stays fast and secure as your business grows.