Generic extensions for IVR and voicemail

Hello All. I hope you are doing well.

I’m making a little PBX. What I want to do is know if there is a commun extensions or generic extension used for the IVR (the menu) and for the voicemail.

I know that I can configure the extensions that I want but the goal is to do it by standar.

Best regards.

No such thing, you can use whatever you want.