/mcp• SIP Profile Configuration • Trunk Configuration • When you configure the External Presentation Information on the SIP Profile Configuration page, the value of External Presentation Number and External Presentation Name on the SIP Profile Configuration page is used, overriding the settings configured on the Directory Number page. • When you configure the Presentation Information on the Trunk Configuration page, the value of Presentation Number and Presentation Name on the Trunk Configuration page is used, overriding the settings configured on the SIP Profile Configuration and Directory Number Configuration pages. Note Call Processing This section describes the incoming and outgoing call behavior when you configure the external presentation name and number feature. Incoming Call Process Cisco Unified Communications Manager looks for FROM and PAID header information when there is a call initiated from the PSTN network. The FROM header contains the external presentation name and number (if configured). However, this is not the real identity of a user, it is used only for display purpose. The PAID header contains the identity (original DN or DDI) of the user. If FROM and PAID headers have different numbers and Enable External Presentation Name and Number option is enabled in the SIP Profile Configuration page and Display External Presentation Name and Number service parameter value is set to True, then Cisco Unified Communications Manager displays the FROM header information (configured external presentation name and number) on the called device. Similarly, if an option is disabled, Cisco Unified Communications Manager displays PAID header information (user's original DN or DDI) on the called device. • By default, Enable External Presentation Name and Number field is unchecked. • Default value of a service parameter Display External Presentation Name and Number is False. Note Invite Received from the PSTN Network From: "Customer Care" sip:1800000@example.com; To: sip:someone@example.com P-Asserted-Identity: "Your personal adviser sip:user1@example.com Remote-Party-ID: "Your personal adviser sip:user1@example.com In the preceding example, FROM header contains a number different from the PAID header. If you check Enable External Presentation Name and Number check box and set Display External Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 780 Advanced Call Processing Call Processing