/mcpDescription Restriction MLPP support for supplementary services specifies the following restrictions: • MLPP addresses only the basic Call Pickup feature and Group Call Pickup feature, not Other Group Pickup. • Call Forward All (CFA) support for inbound MLPP calls always forwards the call to the MLPP Alternate Party (MAP) target of the called party, if the MAP target is configured. In the event of an incorrect configuration (that is, if no MAP target is specified), the call is rejected, and the calling party receives a reorder tone. • Call Forward No Answer (CFNA) support for inbound MLPP calls forwards the call once to a CFNA target. After the first hop, if the call is unanswered, the call is sent to the MAP target of the original called party, if the MAP target has been configured. In the event of an incorrect configuration (that is, if no MAP target is specified), the call gets rejected, and the calling party receives a reorder tone . • Call Forward Busy (CFB) support for inbound MLPP calls forwards the call up to the maximum number that has been configured for forwarding hops. If the maximum hop count gets reached, the call gets sent to the MAP target of the original called party, if the MAP target has been configured. In the event of an incorrect configuration (that is, no MAP target is specified), the call gets rejected, and the calling party receives a reorder tone. • For hunt pilot support, the hunt group algorithm must specify Longest Idle Time, Top Down, or Circular. Ensure the hunt group options for busy treatment, no answer treatment, and unregistered treatment are set to Try next member, but do not go to the next group. Preemption only occurs across a single hunt group. Supplementary Services User Access Channel support exists only for the following Cisco Unified IP Phone models, which must be configured as MLPP Preemption Enabled: • Cisco Unified IP Phone 7960, 7962, 7965 • Cisco Unified IP Phone 7940, 7942, 7945 User Access Channel Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 844 QoS Management Multilevel Precedence and Preemption Restrictions