Unsure which channel width to set on 5 GHz or 6 GHz.
Wider channels give higher peak speeds but fewer non-overlapping channels. In a crowded office with multiple APs, narrower beats wider almost every time because more APs can transmit at once without stepping on each other.
Try this first
- 15 GHz in an office with 3+ APs: use 40 MHz, not 80. At 80 MHz overlap creeps in fast, especially with neighbours.
- 25 GHz in a home or small office (1 to 2 APs): 80 MHz is fine, 160 MHz only if DFS gives no trouble.
- 36 GHz: you can go wider here, 80 or 160 MHz, because there are far more channels, particularly if no neighbours interfere.
- 42.4 GHz: ALWAYS 20 MHz, never 40. 40 on 2.4 in a busy area is self-sabotage.
- 5Test with a Wi-Fi analyzer at peak hour, not at night. If retransmits climb on 80, drop back to 40.
When to bring us in
You have a specific use case like VR headsets or medical imaging over Wi-Fi: rules of thumb stop applying, that is a real WLAN design task with per-device-type measurement.
See also
- Wi-Fi drops randomly across the officeFirst rule out whether it is the access points or the internet connection itself. Different fix.
- One room or corner has no or bad Wi-FiNot always "add another AP"; often one is poorly positioned, or there is a metal wall in the way.
- Internet is suddenly slow for everyoneThree suspects: your provider, a colleague soaking the line, or a backup or update kicking in unexpectedly.
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