In Part 3 of my GDS learning journey, I keep it short and practical and show you exactly how I’ve got the Grandstream GDS3725 set up to unlock a door strike using the built-in keypad. I’m not presenting this as an expert—I’m just sharing what I’m learning as I go, after doing some more testing. For context, my wiring is in the fail secure model, and if you haven’t watched Part 2 yet, you’ll want to check that out because it explains why things are connected the way they are. On the configuration side, I walk through Access Control settings for Relay 1, explain Relay 1 vs Relay 2, and why I’m sticking with Relay Out 1 for this demo. I also cover the key options that matter: keeping Door Relay Options set to Local Relay, what “Delayed Response Time” does (and why I leave it at 0), and how “Open Door Hold Time” controls how long the strike stays unlocked (I leave it at the default 5 seconds). Then I show the Open Door password settings, including Unified PIN mode for a simple “everyone uses the same code” setup, plus a Guest PIN that can be time-limited. Finally, I do live keypad testing so you can see it work in real time—entering the PIN and hitting pound, getting the confirmation, and watching the strike open and re-lock after the hold time. If you’re building a Grandstream GDS setup and want keypad access to be straightforward, this is the exact workflow I’m using right now.