/mcpProcedure Step 1 From the Cisco Unified Serviceability interface, choose Tools > Control Center - Feature Services. Step 2 Choose the Unified Communications Manager server from the Servers drop-down list. In the CM Services area, Cisco CallManager displays in the Service Name column. Step 3 Click the radio button that corresponds to the Cisco CallManager service. Step 4 Click Restart. The service restarts and displays the message, Service Successfully Restarted. Activate Security If you want to enable security on your system, you must install the Cisco CTL Client and enable mixed mode. You can download the CTL installation file in Cisco Unified CM Administration from the Applications > Plugins window. When mixed mode is enabled, the system uses the Certificate Trust List (CTL) file for authentication. The CTL file contains a server certificate, public key, serial number, signature, issuer name, subject name, server function, DNS name, and IP address for each server. For details on how to install the CTL client and enable mixed mode on your system, see the Security Guide for Cisco Unified Communications Manager. Configure the Simple Network Management Protocol If you are using a Network Management System, such as Cisco Prime Collaboration Assurance, enable the Simple Network Management Protocol. Before you begin Your system does not allow more than ten concurrent polling queries. We recommend a maximum of eight trap destinations; anything higher will affect CPU performance. This requirement applies to all installations regardless of the OVA template that you use. Procedure Step 1 Install and configure the SNMP NMS. Step 2 In the Control Center - Network Services window, verify that the system started the SNMP services. Step 3 Unified Communications Manager: In the Service Activation window, activate the Cisco CallManager SNMP service. Cisco Unity Connection only: The Connection SNMP Agent service automatically activates. Step 4 If you are using SNMP V1/V2c, configure the community string. Step 5 If you are using SNMP V3, configure the SNMP user. Step 6 Configure the notification destination for traps or informs. Step 7 Configure the system contact and location for the MIB2 system group. Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 90 Postinstallation Tasks Activate Security