McDewey

C H A P T E R 69 ConfigureMultilevelPrecedenceandPreemption • Multilevel Precedence and Preemption Overview, on page 825 • Multilevel Precedence and Preemption Prerequisites, on page 825 • Multilevel Precendence and Preemption Task Flow, on page 825 • Multilevel Precedence and Preemption Interactions, on page 841 • Multilevel Precedence and Preemption Restrictions, on page 842 Multilevel Precedence and Preemption Overview The Multilevel Precedence and Preemption (MLPP) service allows placement of priority calls. Properly validated users can preempt lower priority phone calls with higher priority calls. An authenticated user can preempt calls either to targeted stations or through fully subscribed TDM trunks. This capability assures high-ranking personnel of communication to critical organizations and personnel during network stress situations, such as a national emergency or degraded network situations. Multilevel Precedence and Preemption Prerequisites Supported SCCP or SIP phones. See the Cisco IP Phone Administration Guide and Cisco IP Phone User Guide for your phones for feature support and more information. Multilevel Precendence and Preemption Task Flow Before you begin Procedure Purpose Command or Action Configure an MLPP domain to specify the devices and resources that are associated with an MLPP subscriber. To Configure Domains and Domain Lists, on page 827, perform the following subtasks: Step 1 • Configure a Multilevel Precedence and Preemption Domain, on page 828 Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 825