/mcpPurpose Command or Action Configure Multilevel Precedence and Preemption for Phones, on page 836 Step 9 After you configure a device, you can add a line (directory number) from the updated Device Configuration window. Configure a Directory Number to Place Multilevel Precedence and Preemption Calls, on page 838 Step 10 When a user profile is assigned to a phone, the phone inherits the configuration of the assigned Configure a User Device Profile for Multilevel Precedence and Preemption, on page 839 Step 11 user, including any CSS that is associated with the user. The phone CSS can, however, override the user profile. Cisco Unified Communications Manager assigns the precedence level that is associated with the dialed pattern to the call when a pattern match occurs. The system sets the call request as a precedence call with the assigned precedence level. Use the default device profile for whenever a user logs on to a phone model for which no Configure the Default Device Profile for Multilevel Precedence and Preemption, on page 840 Step 12 user device profile exists. A default device profile comprises the set of services and features that are associated with a particular device. Configure Domains and Domain Lists Configure an MLPP domain to specify the devices and resources that are associated with an MLPP subscriber. Procedure Purpose Command or Action Associate devices and resources with an MLPP subscriber. When an MLPP subscriber that Configure a Multilevel Precedence and Preemption Domain, on page 828 Step 1 belongs to a particular domain places a precedence call to another MLPP subscriber that belongs to the same domain, the MLPP service can preempt the existing call that the called MLPP subscriber is on for a higher precedence call. MLPP service availability does not span across different domains. The MLPP domain subscription of the originating user determines the domain of the call and its connections. Only higher precedence calls in one domain can preempt connections that calls in the same domain are using. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 827 QoS Management Configure Domains and Domain Lists