Here is the guide to Connection:
Even though you have BE,its the same.
They called "Call Handlers"
Typically you setup a CTI route Point in CUCM which points to Unity Connection. (or to voicemail) Then in Unity create a new call handler with that 4 digit number you assigned in CUCM CTI Route Point.
Then build your caller inputs.
How does the CTI route point know where to go in Unity to get the proper call handler? In CTI I tell it my DN
but there are no options to use a specific call handler.
Any help is appreciated.
Because you don't, CUC doesn't even know who is routing the call. It just cares about which DN it's coming from as a FW call.
The same DN you configure in the CTI RP you configure in the call handler OR you leave the call handler DN blank and configure a call routing rule to handle this.
If this helps, please rate