Map where and when the problem happens. One meeting room that drops calls suggests a different investigation from every employee losing internet access at once. A new router is not a diagnosis; first establish which part of the connection is failing.
Build a small test record
Record the room, device, time, network name, and affected application. Compare another approved device in the same location. Then compare the original device elsewhere. Where practical, compare an approved wired connection as well.
Repeat tests during the period when users normally experience the issue. An empty-office test may not reproduce a problem that appears during a busy video-meeting hour. Record results instead of relying only on the Wi-Fi icon.
Separate wireless from internet access
A connected Wi-Fi indicator does not prove internet access is working. The access point, local network, DNS, internet provider, and destination service can each contribute to failure. Check whether multiple sites fail and whether wired users are also affected.
Microsoft provides Windows Wi-Fi troubleshooting steps. In a managed office, coordinate network resets or configuration changes with IT because business settings may need to be restored.
Review placement and capacity
Walls, room layout, neighboring networks, and access-point placement affect the experience. Ask for evidence from a survey or measured testing before adding equipment. Confirm the cabling and network connection behind each access point can support the planned setup.
Accept a fix using real work
Retest the affected rooms and applications, including calls and normal movement if those were failing. Keep the previous configuration or a documented rollback route for planned network changes. See network troubleshooting for a broader investigation checklist.