/mcpProcedure Step 1 From Cisco Unified CM Administration, choose Call Routing > Mobility > Handoff Configuration. Step 2 In the Handoff Number field, enter the direct inward dialing (DID) number for handoff between the Wi-Fi and mobile voice or cellular network. For numbers that start with the international escape character (+), you must precede the + with a backslash (). Example: +15551234. Step 3 From the Route Partition drop-down list, choose the partition to which the handoff DID number belongs. Step 4 Click Save. Cisco Unified Mobility Call Flow This section describes the incoming and outgoing call flows of Cisco Unified Mobility commonly known as Single Number Reach (SNR). Unified Communications Manager supports the separate calling party number and billing number feature when SNR is configured for users to allow desk phones to extend calls to mobile devices. For example, User-A calls from a PSTN network to User-B whose directory number configured to SNR. If Enable External Presentation Name and Number check box is checked in SIP profile and Display External Presentation Name and Number service parameter value set to True, then Unified Communications Manager displays the FROM header information on both the User-B’s desk phone and the configured remote destination device. In the same way, if any one option is disabled, Unified Communications Manager displays P-Asserted-Identity (PAID) header information on the called device. Similarly, in outgoing call scenario User B (SNRD line) configured with External Presentation Information on Directory Number configuration page initiates a call to a PSTN network through a SIP trunk. If Enable External Presentation Name and Number is configured in its SIP profile, then, Unified Communications Manager send the External Presentation Information in the FROM header of the outgoing SIP message to display on the called device. If Enable External Presentation Name and Number check box is disabled, then Unified Communications Manager sends the directory number information in the FROM and PAID to display on the called device and configured External Presentation Information in the X-Cisco-Presentation header. If you check the Anonymous External Presentation check box, the configured External Presentation Name and External Presentation Number are removed from the respective fields and external presentation displayed as anonymous on the called device. For more details on Configuring External Presentation Information, see Configure Directory Number chapter in the System Configuration Guide for Cisco Unified Communications Manager. FMC Over SIP Trunks Without Smart Client Unified Communications Manager allows service providers to provide base PBX-extension features such as Enterprise Dialing, SNR, Single VM, Call move, and Mid-call features through the trunk without a smart Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs 35 Remote Worker Features Cisco Unified Mobility Call Flow