Ensure your wireless clients are using the latest available wireless drivers. Post your clients wireless adapters model including revision if you're unsure how to check for newer wireless drivers.

The D7 might have a wireless co-existence feature enabled for the wireless AP.

A wireless co-existence feature may disable secondary wireless channel if wireless detects severe wireless interference.

Some wireless routers have an option to enable and disable wireless co-existence others you're stuck with the wireless co-existence feature.

Thanks for the reply.
I can not list all the connected devices.
So I did a test with only PC.
PC Acer TravelMate P253
Wirless card: AR956x Qualcomm Atheros Wireless Network Adapter

I repeat, before this I had a moden Netgear gd2000 and speeds exceeded 230 mbs.
Logically I can ask you neighbors to turn off their router, which comes with a moderate signal.
And 'from esculedere absolutely it's a hardware problem Router Archer D7?

Sorry
You can esculedere absolutely it's a hardware problem Router Archer D7?

Thank you

If wireless co-existence is causing the D7s' wireless AP to only use one channel (20MHz) it could be the cause. W ireless co-existence is a software feature. Wireless co-existence is also sometimes called OBS coexistence in the webgui.

I cannot find any setting for wireless co-existence or OBS coexistence in the webgui of the D7 emulator: http://www.tp-link.com.au/resources/simulator/D7emulator/web/index.htm

The D7 may not have wireless co-existence/ OBS coexistence or have wireless co-existence/ OBS coexistence enabled with no ability to disable it in the webgui.

For me the problem is hardware . The maximum speed reached is 150 MB with no configuration only 2.4 MHz with 40 MHz channel . Same configuration with 20 MHz channel reaches 65 Mb . By the 5 MHz no more than 65Mhz . In my humble opinion it seems to be a problem on the secondary channel . However now I have made ​​a request to the technical service . Look what they say . Thank you

sorry
For me the problem is hardware . The maximum speed reached is 150 MB with 'N only' 2.4 MHz with 40 MHz channel . Same configuration with 20 MHz channel reaches 65 Mb . By the 5 MHz no more than 65Mhz . In my humble opinion it seems to be a problem on the secondary channel . However now I have made ​​a request to the technical service . Look what they say . Thank you

Hi,

PC Acer TravelMate P253 has a wifi chip (Atheros AR5B125) limited to 150Mb/s !

Sorry OK.

Thanks for your time.

Pardon

No problem, happy to help you ;-)