@Proterra To better help you, please help to confirm the following information. 1. What's the model number of your Deco? What's the hardware and firmware version of the Deco? 2. Please describe your...

@Deco_M4_V1 You can try to reboot the 3rd Deco, and then check if it will connect to the 2nd Deco. If not, please try to move the 3rd Deco closer to the 2nd Deco and reboot the 3rd Deco again.

@SimonLuck Hi Our engineer will email you , if you are willing to do further analysis, please check your inbox. Thanks for your cooperation and support. Good day.

@Jokie74 Hi Our engineer will email you, if you are willing to do further analysis, please check your inbox. Thanks for your cooperation and support. Good day.

@YoniK On the original router, when the VDSL connection is enabled, on your Deco, is the connection type dynamic IP? If so, I think the network diagram is no problem and you can keep the current...

@YoniK 1. Normally, Deco won't change the settings on your modem. In your case, I think you may not change the working mode on your DSL modem successfully, it's suggested to contact your modem...