/mcpStep 4 In the Multiple Call/Call Waiting Settings on Device [device name] area of the Directory Number Configuration window, set the Maximum Number of Calls and Busy Trigger options to 1. Step 5 Configure the remaining fields in the Directory Number Configuration window. For more information on the fields and their configuration options, see Online Help. Step 6 Click Save. Configure Secure Tone Service Parameters Procedure Step 1 In Cisco Unified Communications Manager Administration, choose System > Service Parameters. Step 2 From the Server drop-down list, choose a server. Step 3 From the Service drop-down list, choose Cisco CallManager . Step 4 In the Clusterwide Parameters (Feature - Secure Tone) area, set the Play Tone to Indicate Secure/Non-Secure Call Status option to True. Step 5 Click Save. Configure MGCP E1 PRI Gateway If you want the system to pass the protected status of the call between Cisco Unified IP Phone endpoints and the protected PBX phones that connect to the MGCP gateway, follow these steps: Before you begin Configure Phone As a Protected Device, on page 585 Procedure Step 1 In Cisco Unified Communications Manager Administration, choose Device > Gateway. Step 2 Specify the appropriate search criteria and click Find. Step 3 Choose a MGCP gateway. The Gateway Configuration window appears. Step 4 Set Global ISDN Switch Type to Euro. Step 5 Configure the fields in the Gateway Configuration window. See the online help for more information about the fields and their configuration options. Step 6 Click Save. Step 7 Click the Endpoint icon that appears to the right of subunit 0 in the window. The Enable Protected Facility IE check box appears. Check this check box. Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 586 Presence and Privacy Features Configure Secure Tone Service Parameters