Which of the following interfaces enables database synchronization between UCM and a CUPS server? (Select the best answer.)
The Cisco Administrative Extensible Markup Language (AXL)/Simple Object Access Protocol (SOAP) interface enables database synchronization tasks from Cisco Unified Communications Manager (UCM) to a Cisco Unified Presence (CUPS) server database. UCM and CUPS together are the primary components of a Cisco Presence deployment. For synchronization to start, the Sync Agent service must be started on the CUPS server.
The Extensible Messaging and Presence Protocol (XMPP) interface does not enable database synchronization between UCM and a CUPS server. However, the XMPP interface is used to handle the exchange of availability information between UCM and XMPP clients, such as instant messaging (IM) clients that are developed by third parties.
The Session Initiation Protocol (SIP) interface does not enable database synchronization between UCM and a CUPS server. However, a SIP trunk interface does handle the exchange of availability information between UCM and a CUPS server. A UCM SIP trunk interface must point to the CUPS server in order for availability information to be exchanged between the two systems. CUPS is also capable of sending SIP subscribe messages to UCM over the SIP trunk if UCM is configured as a Presence gateway.
The Lightweight Directory Access Protocol (LDAP) interface does not enable database synchronization between UCM and a CUPS server. However, the LDAP interface is used to synchronize user information between UCM and CUPS in order to create a single signon (SSO) user experience or to search for contacts. For example, a Cisco Unified Personal Communicator user can be authenticated to both the CUPS server and UCM by connecting directly to the CUPS server. LDAP listens on Transmission Control Protocol (TCP) port 389 unencrypted or on port 636 over Secure Sockets Layer (SSL). Thirdparty XMPP clients can also use LDAP to search the database and add users as contacts.