If I added the Number of an extention to the line key (for example 200, 300, 400 and 500, see screenshot), will the extention-number overwritten from the provisioning template every 86400 seconds (by standard setting). I want, that the extention 200 ...

Hello! Can somebody help me, please How can I program the line key on SPA525g so that I can open the door by pressing the line key button?The extension of the door: 77The code to open: #678This command is not right?fnc=sd+blf+cp;sub=77 # 678@192.168....