/mcpCall Park Restrictions Restriction Feature Unified Communications Manager can park only one call at each call park extension number. Call Park For shared line devices across nodes, the line registers to the node on which the device registers first. For example, if a device from subscriber2 registers first and the line is created in subscriber2 and the publisher node, the line belongs to subscriber2. Each node must be configured with the call park number. Shared Line To achieve failover or fallback, configure call park numbers on the publisher node and subscriber nodes. With this configuration, when the primary node is down, the line device association gets changed to the secondary node, and the secondary node call park number gets used. Backup If a directed call park (or call park) is initiated from a shared line and the call is not retrieved from any device, the parked call does not always get reverted to the recipient in the shared line (parker). Directed Call Park When a conference call is set up between both the shared line and the caller on park reversion or park reversion fails causing a two-party call (between the other shared line and caller). The reason is that, on park reversion, Unified Communications Manager extends the call to both devices sharing the line and tries to add either party in conference (party already in conference or party that hit the park). If the party attempts to add the party who is already in the conference first, then the park reversion fails. When park reversion fails, the shared line can still barge into the call as usual. Conference If any call park numbers are configured for Unified Communications Manager on a node that is being deleted in the Server Configuration window (System > Server), the node deletion fails. Before you can delete the node, you must delete the call park numbers in Cisco Unified Communications Manager Administration. Delete Server Troubleshooting Call Park User Cannot Park Calls Problem User cannot park calls. When the user presses the Park softkey or feature button, the call does not get parked. Solution Ensure that a unique call park number is assigned to each Unified Communications Manager in the cluster. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 392 Receiving Calls Call Park Restrictions