/mcpTable 23: Ad Hoc Conference Service Parameters Description Service Parameters Drop Ad Hoc Conference, prevents toll fraud (where an internal conference controller disconnects from the conference while outside callers remain connected). The service parameter settings specify conditions under which an ad hoc conference gets dropped. • Never—The conference does not get dropped. (We recommend that you use the default option to avoid unintentional termination of a conference). • When No OnNet Parties Remain in the Conference—The system drops the active conference when the last on-network party in the conference hangs up or drops out of the conference. Unified Communications Manager releases all resources that are assigned to the conference. Note Drop Ad Hoc Conference feature in an ILS deployment will not drop the parties when it set at When No OnNet Parties Remain in the Conference because the route patterns learned are classified as On Net. • When Conference Controller Leaves—The active conference terminates when the primary controller (conference creator) hangs up. Unified Communications Manager releases all resources that are assigned to the conference. Note We recommend that you set this service parameter to Never. Any other setting can result in unintentional termination of a conference. The Drop Ad Hoc Conference service parameter works differently for conference calls that are initiated from a Cisco Unified IP Phone 7940 or 7960 that is running SIP, or a third-party phone that is running SIP . Drop Ad Hoc Conference This parameter specifies the maximum number of participants that are allowed in a single Ad Hoc conference. Default Value: 4 Maximum Ad Hoc Conference This parameter determines whether advanced Ad Hoc conference features are enabled. This includes the ability of non-controller participants to add and remove other participants and the ability of all participants to link ad hoc conferences together. Advanced Ad Hoc Conference Enabled This parameter determines whether more than two Ad Hoc conferences can be linked directly to an Ad Hoc conference in a non-linear fashion ( three or more conferences linked to any one conference). Non-linear Ad Hoc Conference Linking Enabled Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 225 Conferencing Features Ad Hoc Conferencing Service Parameters