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TP-Link Deco BE85

Specs

Generation
WiFi 7
Bands
2.4 GHz + 5 GHz + 6 GHz
Transmit power (preset)
20 dBm
Antenna gain (preset)
3 dBi

Transmit power and antenna gain are informed presets, not datasheet values. Consumer WiFi vendors publish PHY rates, not conducted power, so these two figures come from a documented, deliberately conservative rule instead of a spec sheet — they exist to keep the Coverage Mapper and Channel Advisor honest, not to describe this exact unit down to the milliwatt.

Band capabilities

  • 2.4 GHzUp to about 100 Mbps at close range, real-world — well under the number printed on the box.
  • 5 GHzUp to about 600 Mbps at close range, real-world — well under the number printed on the box.
  • 6 GHzUp to about 700 Mbps at close range, real-world — well under the number printed on the box.

Channel guidance

TP-Link Deco BE85 (WiFi 7) — using the Conservative worldwide set channel rules.

For a typical household on this hardware, run through the exact same Channel Advisor logic every real visitor gets. Answer five questions yourself for guidance tuned to your own neighbours and country.

2.4 GHzRange band
6 channel20 MHz wide

A moderate amount of company on this band. 1/6/11 are the only channels that do not overlap each other; channel 6 is the middle one and is less crowded than the factory-default ends.

Use 20 MHz here no matter what your router offers: 40 MHz on 2.4 GHz eats two thirds of the band and leaves no clean channel for anyone, including you. The channel itself is an educated guess — we cannot scan your neighbours from a web page, so if the change does not help, try the other channels in the set. A real scan is what the desktop scanner is for.

5 GHzEveryday band
44 channel80 MHz wide

Moderate company on 5 GHz, and your regulatory domain does not open the upper non-DFS block (UNII-3), so there is no second non-DFS home to move to. Channel 44 is an off-center pick inside the only non-DFS range here (36/40/44/48) — still no radar-vacate risk, just not guaranteed to be quiet at this density.

With this much company on the band and only one non-DFS range to share, a DFS channel may genuinely be quieter even though it carries a radar-vacate risk — worth trying if this one stays congested.

These are recommendations, not measurements. The widths and the band advice are physics and hold everywhere. The channel numbers are an educated guess built from how many networks you told us you can see — we cannot scan your neighbours from a web page, because no browser is allowed to. If a change does not help, try the other channels in the same set; nothing here can damage anything, and every one of these settings is reversible.

How to change this on your TP-Link (Archer, Deco)

How to change this on your TP-Link (Archer, Deco)

Where to sign in: http://tplinkwifi.net — or 192.168.0.1 — or the Tether / Deco app

Menu names are shown as they appear in the router’s English interface — your router may show them in your own language.

  1. Open http://tplinkwifi.net in a browser on a device that is already connected, and log in with the router admin password (not the WiFi password).
  2. On an Archer, go to Advanced → Wireless → Wireless Settings. On a Deco, open the Deco app and go to More → WiFi Settings → Advanced.
  3. If you see a “Smart Connect” switch at the top, turn it off — while it is on, every band shares one set of settings and the channel boxes stay greyed out.
  4. Pick the band tab (2.4 GHz, 5 GHz, 6 GHz) and set Channel and Channel Width to the values recommended above. Leave Mode and Transmit Power alone.
  5. Save, then wait about thirty seconds — the radios restart and every device reconnects on its own.
  6. If you turned Smart Connect off and you want it back, turn it on again after confirming the new channel is working; the channel you set is kept.

Menu names drift between firmware versions. If a label here does not match what you see, look for the nearest equivalent — the two fields you want are always called something close to “Channel” and “Channel Width” (or “Bandwidth”).

Placement notes

  • Standard external-whip antennas — the usual placement rules apply: central, elevated, away from metal and standing water.
  • Three radios, 2.4, 5 and 6 GHz — 6 GHz gives up noticeably more signal per wall than 5 GHz, so treat it as the same-room-and-next-room band and let 5 GHz do the reaching.
  • Only WiFi 6E and WiFi 7 devices can even see the 6 GHz radio, and it loses more signal per wall than 5 GHz — expect it to cover the room the router is in and maybe the next one, not the whole floor.