/mcp• Configure the SIP trunks that you want to use with the BLF presence feature. BLF Presence Configuration Task Flow Before you begin • Review BLF Presence Prerequisites, on page 529 Procedure Purpose Command or Action Configure BLF options that apply to all devices and services in the same cluster. You can Configure and synchronize cluster-wide enterprise parameters for Busy Lamp Field Step 1 synchronize enterprise-parameter configuration (BLF). See Configure/Synchronize changes with the configured devices in the Cluster-Wide Enterprise Parameters for BLF, on page 531. least-intrusive manner. For example, a reset or restart may not be required on some affected devices. Configure presence service parameters to configure different services on selected servers Configure cluster-wide service parameters for BLF. See Configure Cluster-Wide Service Parameters for BLF, on page 532. Step 2 in Cisco Unified Communications Manager Administration. Configure BLF presence groups to control the destinations that watchers can monitor. Configure BLF presence groups. See Configure BLF Presence Groups, on page 532. Step 3 Apply a BLF presence group to a directory number, SIP trunk, phone that is running SIP, To associate BLF presence group with devices and users, perform the following subtasks: Step 4 phone that is running SCCP, application user • Associate BLF presence groups with phones. See Associate BLF Presence Groups with Phone, on page 534. (for application users that are sending presence requests over the SIP trunk), or end user. • Associate BLF presence groups with SIP trunks. See Associate BLF Presence Groups with SIP Trunk, on page 535. • Associate BLF presence groups with an end user. See Associate BLF Presence Groups with End User, on page 536. • Associate BLF presence groups with an application user. See Associate BLF Presence Groups with Application User, on page 537. To enable application-level authorization for a SIP trunk application in addition to trunk-level authorization. Accept BLF presence requests from external trunks and applications. See Accept BLF Presence Requests from External Trunks and Applications, on page 538. Step 5 Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 530 Presence and Privacy Features BLF Presence Configuration Task Flow