When an incoming call encounters a codec mismatch, a transcoder is required to convert the media stream from one codec to another. In this case, the call is using G.711, but the phone requires G.729. A transcoder will handle the conversion between these differing codec formats to ensure the call can be completed successfully. Other media resources like CFB, MOH, and MTP do not perform the function of codec transcoding.

To disconnect a multiparty call when the call initiator hangs up in Cisco Unified Communications Manager, the service parameter 'Drop Ad Hoc Conference' should be enabled. This parameter ensures that when the original caller of an ad hoc conference hangs up, the entire conference is terminated, preventing other participants from continuing the call.

When a user is deleted from the LDAP directory, they appear as an Inactive LDAP Synchronized User in Cisco Unified Communications Manager. The appropriate next step to remove this user from the system is to wait 24 hours for the garbage collector process to automatically delete the inactive user. This garbage collection process runs at a predetermined time daily, ensuring that inactive users are cleaned up automatically without requiring manual intervention.

When Cisco Unity Connection is integrated with LDAP, all user information, including the first name, is sourced from the Active Directory. Therefore, any changes to the user's name must be made directly in Active Directory.

To synchronize a Cisco SIP phone with a specific time source, it is necessary to add a Phone NTP Reference to the Date/Time Group. This ensures that the phone retrieves the correct time from the specified Network Time Protocol (NTP) server.