- A BlackBerry Mobile Voice System user connects to a Wi-Fi network and authenticates with the BlackBerry MVS. On the BlackBerry device, the user presses the Menu key, clicks Move Call, and clicks Desk.
- The device starts a call move request. The device compresses, encrypts, and sends the request to the BlackBerry Enterprise Server over the Wi-Fi network.
- The BlackBerry Enterprise Server decrypts, decompresses, and sends the request to the MVS BlackBerry Enterprise Server Connector over a TCP connection.
- The MVS BlackBerry Enterprise Server Connector sends the request to the MVS Session Manager.
- The MVS Session Manager sends the request using SIP to the PBX over a UDP port.
- The PBX determines that the desk number is an internal number and rings the desk number over the LAN.
- The recipient answers the call at the desk phone and voice communication occurs over an RTP connection that the PBX opens between the two endpoints.