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Figure 22: Desktop Pickup of Mobile Phone Call In this use case, the following entities participate: • The customer call originates from mobile device UserACell, enterprise extension1000 and mobile number 9725551000. • The agent receives the call at DN2000 deviceB. • The customer resumes the call from the customer enterprise phone DN1000 deviceA. During an automatic call recording session where desktop pickup of a mobile phone call occurs, the following steps take place: 1. UserACell calls partyB DN2000 deviceB. 2. Cisco Unified Mobile Communicator client sends SETUP message 3. SETUP message travels through H.323 gateway to local Cisco Unified CM1 cluster. 4. PartyB answers the incoming call from UserACell. 5. Because the agent line appearance is configured for automatic recording, the recording session for the media streams automatically gets triggered. Cisco Unified Communications Manager first makes a recording call to the built-in bridge (BIB) of the partyB (agent) IP phone for the agent voice. 6. Cisco Unified Communications Manager makes the second recording call to the BIB of the partyB (agent) IP phone for the customer voice. 7. The recorder receives and answers the recording INVITE messages that are sent from Cisco Unified Communications Manager for the agent voice through a SIP trunk. The agent IP phone starts to fork the partyB (agent) voice stream to the recorder. 8. The recorder receives and answers the recording INVITE messages that are sent from Cisco Unified Communications Manager for the customer voice through a SIP trunk. The agent IP phone starts to fork the partyUserACell (customer) voice stream to the recorder. 9. UserACell presses Enterprise Hold on the userA mobile phone. 10. UserA presses Resume on the userA desk phone. Note the following particularities of call processing that apply in this use case: • Mobile phone uses the shared-line concept. When the mobile phone call gets put on hold and the desktop phone resumes the call. Cisco Unified Communications Manager restarts the recording. 28