What's 2300? How do you call the desk next to you? Do all outside calls start with 371 or can you dial 8 digits?

These are all questions that an installer would ask to set up a dialing plan and it's beyond the scope of our humble forum to do your homework.

If your allow and restrict tables are empty, you might want to try inserting digits into it and test. Filling the tables is only a part of your programming. You then need to apply the tables to a Class of Service and extensions to a COS as noted above.

Our free advice here is worth every Euro you pay :-)

Carl