/mcpFor details on these interfaces, see Cisco Unified JTAPI Extensions, on page 249 To view the message flow for barge, CBarge, and privacy, see Message Sequence Charts, on page 761. Call Control Discovery The Call Control Discovery (CCD) feature facilitates provisioning for inter-call agent communications. It uses the Service Advertisement Framework (SAF) network service to advertise itself as a call control entity and to discover other call control entities (Cisco Unified Communications Managers or CMEs) on the network so that it can dynamically adapt their routing behavior. When a call is made between two devices on different clusters and the call is rejected with a cause code other than unallocated , unassigned number and user busy, the CCD feature fails over the call to a PSTN network. That is, the call is routed through a PSTN network instead of an IP network to reach the same destination. JTAPI supports the SAF CCD feature. However, applications are not notified when a normal SAF call fails over to a PSTN trunk. JTAPI exposes a new reason CiscoFeatureReason.REASON_SAF_CCD_PSTN_FAILOVER for the new connection created for the redirect or forward destination. This occurs when there is a redirect or forward across the cluster through an SAF trunk and the call fails over to a PSTN trunk. Interface Changes See CiscoFeatureReason, on page 408 Message Sequences See Call Control Discovery, on page 785 Backward Compatibility This feature is backward compatible. Call Forward Cisco Unified JTAPI supports setting the Call Forward feature according to the JTAPI Specification. Cisco Unified JTAPI implementation does not support all the forwarding characteristics but supports only the FORWARD_ALL attribute for the Address. Applications can invoke setForwarding, getForwarding, and cancelForwarding methods on a CallControlAddress object, but the CallControlForwarding instruction can only be of type FORWARD_ALL. Call Forward Override This feature provides a mechanism to override the call forward all feature. If a user (CFA Initiator) sets CFA to another user (CFA target), the CFA should be ignored if the CFA target calls the CFA initiator. This would allow the CFA Target to reach the CFA Initiator for important calls. The behavior of this CallManager feature is configurable via service parameter - CFADestinationOverride. Cisco Unified JTAPI Developers Guide for Cisco Unified Communications Manager, Release 15 and SUs 41 Features Supported by Cisco Unified JTAPI Call Control Discovery