/mcpThe Advanced Ad Hoc Conference Enabled service parameter determines whether ad hoc conferences can be linked together by using features such as conference, join, direct transfer, and transfer. Note Unified Communications Manager provides these options to maintain a secure conference: • Ad hoc conference lists • Meet-Me conference with minimum security level Ad Hoc Conference Lists A conference list displays on participating phones when the ConfList softkey is pressed during a conference call. The conference list provides the conference status as well as the security status for each participant to identify participants that are not encrypted. Conference list displays these security icons: nonsecure, authenticated, encrypted, held. The conference initiator can use the conference list to eject participants with a low security status. The Advanced Ad Hoc Conference Enabled service parameter determines whether conference participants other than the conference initiator can eject conference participants. Note As participants join the conference, they get added to the top of the conference list. To remove nonsecure participants from a secure conference with the ConfList and RmLstC softkeys, refer to the user documentation for your phone. The following sections describe secure ad hoc conference interactions with other features. Secure Ad Hoc Conference and Conference Chaining When an ad hoc conference is chained to another ad hoc conference, the chained conference displays in the list as member “Conference” with its own security status. Unified Communications Manager includes the security level for the chained conference to determine the overall conference security status. Secure Ad Hoc Conference and cBarge When a user presses the cBarge softkey to join an active conference, Unified Communications Manager creates an ad hoc conference and allocates a conference bridge according to the security level and MRGL of the barged device. The cbarge member names display in the conference list. Secure Ad Hoc Conference and Barge If a participant in a secure ad hoc conference gets barged, the barge call security status shows in the conference list next to the barge target. The security icon for the barge target may show authenticated when, in fact, the media is encrypted between the barge target and the conference bridge, because the barge caller has an authenticated connection. If the barge target is secure but in an unsecured ad hoc conference, if the ad hoc conference status later changes to secure, the barge caller icon will update as well. Security Guide for Cisco Unified Communications Manager, Release 15 and SUs 160 Basic System Security Ad Hoc Conference Lists