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Transferring a call on a BlackBerry device using Voice over Mobile

  1. A BlackBerry Mobile Voice System user is on a BlackBerry device call with Party A using Voice over Mobile. To transfer the call, the BlackBerry MVS user presses the Menu key, clicks Transfer, and clicks the phone number of Party B. When the transfer process starts, the BlackBerry MVS puts Party A on hold.
  2. The BlackBerry MVS Client creates a transfer request, which includes the destination number. One of the following events occurs:
    • If the user is in a wireless coverage area where data services are not available, the BlackBerry MVS Client uses DTMF tones to create the transfer request and sends it to the MVS Session Manager.
    • If the user is in a wireless coverage area where data services are available, the BlackBerry MVS Client compresses and encrypts the transfer request, and sends it to the BlackBerry Enterprise Server over the wireless network. The BlackBerry Enterprise Server decrypts and decompresses the hold request, and sends it to the MVS BlackBerry Enterprise Server Connector. The MVS BlackBerry Enterprise Server Connector sends the request to the MVS Session Manager.
  3. The MVS Session Manager sends the transfer request to the PBX to create a new call on the SIP line to Party B.
  4. When Party B answers, the MVS Session Manager connects the SIP trunk call leg and SIP line call leg. The BlackBerry MVS user and Party B can communicate.
  5. The BlackBerry MVS Client creates a complete transfer request. One of the following events occurs:
    • If the user is in a wireless coverage area where data services are not available, the BlackBerry MVS Client uses DTMF tones to create the complete transfer request and send it to the MVS Session Manager.
    • If the user is in a wireless coverage area where data services are available, the BlackBerry MVS Client compresses and encrypts the complete transfer request, and sends it to the BlackBerry Enterprise Server over the wireless network. The BlackBerry Enterprise Server decrypts and decompresses the complete transfer request, and sends it to the MVS BlackBerry Enterprise Server Connector. The MVS BlackBerry Enterprise Server Connector sends the request to the MVS Session Manager.
  6. The MVS Session Manager instructs the PBX to connect Party A to Party B and end the call with the BlackBerry MVS user's extension number. Party A can now speak with Party B.
  7. The MVS Session Manager releases the SIP trunk call leg to the mobile number of the BlackBerry MVS user.

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