How to setup two PSTN sip on one FreePBX ? And how to route?

[avayax (Johann Zurner)]

Use different directories for your extensions:

Dial extensions limited by directory

Hi, basically, I’m running multiple businesses on the same system, so I want to keep them separate. If someone calls and means to dial ext 101 and presses 201 it will ring another business. I found this post about restricting it, but doesn’t seem to work (IVR Setup - Enable Direct Dial (limit to Directory context)) How could this be done?