/mcpConfiguration Description AS-SIP Feature Specify the URI that an IMS client uses to set up a conference: 1. From Cisco Unified CM Administration, choose System > Service Parameters. 2. From the Server drop-down list select your Cisco Unified Communications Manager server. 3. From the Service, select Cisco CallManager. 4. Under Clusterwide Paramters (Feature - Conference) assign an IMS Conference Factory URI. 5. Click Save. Conference Factory DSCP settings allow you to manage QoS and bandwidth within your network. DSCP settings are used to assign a prioritized Traffic Class Label to calls on a per-call basis. You can configure clusterwide DSCP settings via service parameters and you can use the SIP Profile to assign a customized QoS policy for users whom use that profile. For example, you could assign higher priority for the calls of an executive (for example, a CEO) or a sales team to ensure that their calls are not dropped if network bandwidth issues arise. To configure DSCP, see DSCP Settings Configuration Task Flow, on page 773. DSCP Markings By default, Cisco Unified Communications Manager is configured to use IPv4 addressing. However, you can configure the system to support the IPv6 stack thereby allowing you to deploy a SIP network with IPv6-only endpoints. For more information to configure IPv6, see "Dual Stack IPv6 Configuration Task Flow" chapter in the System Configuration Guide for Cisco Unified Communications Manager IPv6 The Multilevel Precedence and Preemption (MLPP) service allows placement of priority calls. 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. To configure MLPP, see Multilevel Precendence and Preemption Task Flow, on page 825. Multilevel Precedence and Preemption (MLPP) The Secure Real-time Transport Protocol (SRTP) can be used to provide encryption and authentication to media streams in your calls. SRTP can be configured for phones within the Phone Security Profile Configuration that the phone uses. You must set the Device Security Mode field to Encrypted. Secure Real-Time Transport Protocol (SRTP) Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 823 QoS Management Configure AS-SIP Features