/mcpDirectory Number Configuration Fields for Call Forwarding Description Field Check this check box to forward the call to the voicemail. Note When you check this check box, Unified Communications Manager ignores the values in the Destination and Calling Search Space fields. Voice Mail Enter a destination mask to determine the AAR destination to dial instead of using the external phone number mask. AAR Destination Mask Choose an AAR group from the drop-down list. It provides the prefix digits that are used to route calls that are otherwise blocked due to insufficient bandwidth. If you choose None, the server does not attempt to reroute the blocked calls. You can also configure this value in the Precedence Alternate Party Timeout service parameter from System > Service Parameters. AAR Group By default, the directory number configuration retains the AAR leg of the call in the call history, which ensures that the AAR forward to voicemail system will prompt the user to leave a voice message. If you check the check box, the AAR leg of the call will be present in the call forwarding history. Retain this destination in the call forwarding history Configure Call Forward Alternate Destination Before you begin Configure Call Forward No Bandwidth, on page 334 Procedure Step 1 From Cisco Unified CM Administration, choose Call Routing > Directory Number Configuration. The Find and List Directory Numbers window is displayed. Step 2 Click Find. A list of configured directory numbers is displayed. Step 3 Choose the directory number for which you want to configure an alternate destination. The Directory Number Configuration window is displayed. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 335 Receiving Calls Directory Number Configuration Fields for Call Forwarding