/mcpExternal Call Control Interactions Table 73: External Call Control Interactions Interaction Feature You can set up routing rules on the adjunct route server that determine which gateway to use for a call, taking voice quality into consideration. For example, gateway A provides the best voice quality, so it is used for the call. In this case, the adjunct route server monitors network link availability, bandwidth usage, latency, jitter, and mean opinion scores (MOS) to ensure that calls are routed through voice gateways that deliver the best voice quality to all call participants. Best Call Quality Routing External Call Control functions can be displayed in call detail records; for example, the call detail record can indicate whether the adjunct route server permitted or rejected a call. In addition, the call detail record can indicate whether Unified Communications Manager blocked or allowed calls during which it did not receive a decision from the adjunct route server. Call Detail Records External Call Control intercepts calls at the translation pattern level, while Call Forward intercepts calls at the directory number level. External Call Control has a higher priority than Call Forward; for calls that invoke Call Forward, Unified Communications Manager sends a routing query to the adjunct route server if the translation pattern is assigned to an External Call Control profile. Call Forward is triggered only when the adjunct route server sends a Permit decision with a Continue obligation to the Cisco Unified Communications Manager. Note The Call Diversion Hop Count service parameter that supports External Call Control and the Call Forward Call Hop Count service parameter that supports Call Forward are independent of each other. Call Forward When a phone user tries to pick up a call by using the Call Pickup feature, External Call Control is not invoked; Unified Communications Manager does not send a routing query to the adjunct route server for that portion of the call. Call Pickup A chaperone is a designated phone user who can announce company policies to the call, monitor the call, and record the call, if required. Chaperone restrictions exist so that the parties that are involved in the call cannot converse without the presence of the chaperone. Chaperones Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 734 Advanced Call Processing External Call Control Interactions