Enter a name for the Route List and click Save.In CUCM, navigate to Call Routing > Route/Hunt > Route List.Find the newly created SIP trunk under Find Devices and click Add to Route Group. Enter a name for the Route Group, change Distribution Algorithm to Top Down.In CUCM, navigate to Call Routing > Route/Hunt > Route Group.Change the SIP Profile to the profile we made earlier. Change the SIP Trunk Security Profile to the new profile we made earlier. Under SIP Information enter the Destination Address of the Unity Connection Publisher.Be sure to set a Rerouting Calling Search Space to ensure the calls can be transferred from Unity back to CUCM.Under Outbound Calls, check Redirecting Diversion Header Delivery – Outbound.Under Inbound Calls select the CSS for inbound CUXN if you have one and check Redirecting Diversion Header Delivery – Inbound.Check R un On All Active Unified CM Nodes. Select the proper Device Pool for the Trunk. Click Add New, select SIP Trunk and SIP from the drop down menus and click Next.I also like to enable SIP OPTIONS Ping, this will let you know if the SIP Trunk has been established, and for how long it has been up, on the Find and List Trunks page. Enter a Name and Description for the SIP Profile.To right of Standard SIP Profile click Copy.In CUCM, navigate to Device > Device Settings > SIP Profile.Enter a Profile Name and Description, check Accept Out-of-Dialog REFER, Accept Unsolicited Notification, Accept Replaces Header.In CUCM, navigate to System > Security > SIP Trunk Security Profile.This is now the Cisco recommended best practice and replaces the legacy CTI Route Point configuration. Below are the steps to configure SIP integration between CUCM and Unity Connection.
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