Networks guide
Office Wi-Fi Keeps Dropping: Troubleshooting Business Wireless Networks
Intermittent wireless problems are among the most disruptive issues an office faces, because they interrupt calls and cloud applications without leaving an obvious fault behind. They are also among the most diagnosable. The pattern of who drops, where and when points clearly to the cause.
Gather the pattern first
- Where: particular rooms or desks, or everywhere?
- When: at busy times of day, or randomly?
- Who: all devices, or particular laptops, phones or operating systems?
- What happens: does the device lose the network completely, or stay connected with no internet?
“Connected, no internet” is usually not a wireless problem at all. It points to DHCP, DNS or the internet connection, covered in our guide on devices not getting an IP address.
Step-by-step
Check coverage where problems occur
Measure signal strength at the affected desks. Walls, glass, filing cabinets and floors absorb signal, and an office layout that has changed since the access points were installed often leaves gaps. As a rule of thumb, a signal weaker than about -70 dBm is likely to cause problems for voice and video.
Look for channel congestion
On the 2.4 GHz band only channels 1, 6 and 11 avoid overlapping each other. In shared buildings, neighboring networks frequently occupy the same channels. Business access points can choose channels automatically; check the controller to see whether they are being forced into congested ones. Moving capable devices to 5 GHz relieves most congestion.
Check DHCP capacity
If the network supports more devices than the DHCP scope has addresses, newer arrivals fail to connect, typically mid-morning. Phones, laptops, printers, IoT devices and visitors all consume leases. Review the scope size and lease duration on your router, firewall or DHCP server.
Review roaming behavior
Laptops that stay connected to a distant access point as staff move around the office will see poor performance. Reducing transmit power on access points that are too strong, and enabling the roaming features supported by your system, helps devices move to the nearest access point.
Separate guest and staff traffic
Visitor and personal devices should be on a separate guest network with its own address range and bandwidth limits. This protects business systems and prevents guests from using up addresses on the staff network.
Update firmware and drivers
Access point firmware and laptop wireless drivers both receive fixes for stability problems. If only one model of laptop drops, update its wireless driver from the laptop manufacturer before changing the network.
Consumer equipment in a business setting
Many offices start with an ISP-supplied router or a consumer mesh system. These are designed for a household's number of devices and offer little visibility when things go wrong. Business access points with central management show which clients are connected where, at what signal strength, and why they disconnect, which turns guesswork into a short investigation.
When to escalate
Escalate when problems affect the whole office, when the cause isn't clear from the pattern, or when the network needs redesigning, such as adding access points, cabling or VLANs. A wireless survey of the floor plan is the reliable starting point for that work.