@data021 

Unfortunately yes.

After I had contact to the English and the German mail-support for days now and moved the EAP to our DMZ and offered them access for live diagnosis, I got finally an unpleasant answer about the missing RX/TX in the graph 3 hours ago:

TP-Link wrote by Mail

Dear Till,

 

For the issue that the Omada 4.x doesn't show RX/TX-Frames and the Calculated Interference for the EAP235 as it did for the EAP 115, I confirmed with the R&D team:

 

Due to chip differences, the channel utilization on EAP235-Wall/EAP230-Wall cannot distinguish Tx/Rx frame, so Tx/Rx and Interference are uniformly represented by Busy.

That's why you only see Busy and Free with EAP235-Wall and EAP230-Wall, but you get Tx/Rx frame, Interference and Free with other EAPs.

If you are trying to analyze if the channel is occupied by clients or other devices/foreign APs, you may use InSSIDer or WiFi Analyzer on a cellphone instead.

 

We look forward to hearing back from you. If you have additional information or feedback to provide, please let us know.

Fiona.Yuan

TP-Link Technical Support