I appreciate your assistance; it is now operational. What is the process for configuring an X20 link with Range Extenders that operate on the same channel?

Here's my setup: ZTE UniFi Modem --> Deco x20 (primary) --> Deco x20 (room 2) --> Deco x20 (room 3) --> TV, Mobile, Labtops. - ZTE UniFi Modem to Deco x20 (primary) connects on port 1. - Deco x20...