Hello Andre,
What I normally do when Unity is integrated with a Unified Communications Manager is just create a CTI Route Point with an extension that will match the number being called. Then forward that extension to VM. In Unity I will create a Call Handler with the same extension and configure the Schedule, Greetings and Caller Input options according to the functionality you want.
To use one of your examples...
When outside callers dial number 1111-1111 they should hear a greeting "welcome to A Company , dial 1 for sales, 2 for technical, and 3 for admin.
I would configure the following.
CTI Route Point (In CUCM)
Device Name - CompanyA
Description - Company A Auto Attendant
Device Pool - The Device Pool for the site where Unity is located (usually the same one the voicemail ports are in)
Calling Search Space - Whatever Calling Search Space that can call the Unity voicemail ports
Location - The Location where the Unity server is located (usually Hub_None)
Leave the rest of the settings at their defaults.
Then add the line.
Directory Number - 1111 (assuming that is what your provider is sending to you when an outside caller dials 1111-1111 or that is what you have your voice port PLAR'd to if the call is coming in on an analog port).
Partition - Whatever Partition the Gateway your call is coming in on can call (usually something like a Partition called Internal)
Forward All - Check the Box for Voicemail
Leave the rest of the settings at their defaults.
In Unity
Create a Call Handler that has extension 1111 and configure the Schedule (if desired), Greetings (Standard Greeting saying Welcome to A Company), and Caller Input Options (1 - Sales Extension, 2 - Technical Support Extension, 3 - Admin Extension), etc.
When someone calls 1111.1111 it'll hit your PBX (CUCM in my example) which will then pass it to Unity and Unity will recognize the extension and execute the Call Handler you created.
Do this for each AA you want to create. I hope this helps. Good luck!
