Use the Device > Trunk menu option in Cisco Unified Communications Manager Administration to create a SIP trunk that points to the MiaRec announcement player.
Choose a descriptive name.
Set Device Pool to the same pool as used for phones themselves.
Ensure that the Media Termination Point Required check box is unchecked.
Select the Run On All Active Unified CM Nodes check box.
In Call Routing Information -> Inbound Calls section, please configure:
Set Calling Search Space to the CSS that contains the user phones
In SIP Information section, configure the following:
Destination Address should point to ip-address or DNS name of the MiaRec announcement player.
Destination Port should match the port on which MiaRec announcement player is listening for messages from CUCM.
Select the previously created SIP Trunk Security Profile for the announcement player.
Select the previously created SIP Profile for the announcement player.