/mcpProcedure Step 1 From Cisco Unified CM Administration, choose System > Service Parameters. Step 2 From the Server drop-down list, choose the server. Step 3 From the Service drop-down list, choose Cisco CallManager. Step 4 Configure the fields in the Clusterwide Parameters (Features - Conference) area. For parameter descriptions, see Ad Hoc Conferencing Service Parameters, on page 224. Step 5 Click Save. What to do next Configure Join Across Lines, on page 227 Ad Hoc Conferencing Service Parameters The following table lists the main service parameters for Ad Hoc conferencing. For additional conferencing service parameters, refer to the Service Parameter Configuration window's Advanced option. Conferencing service parameters appear under Clusterwide Parameters (Feature - Conference). Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 224 Conferencing Features Ad Hoc Conferencing Service Parameters