- A BlackBerry Mobile Voice System user connects to an organization's Wi-Fi network and authenticates with the BlackBerry MVS. The BlackBerry MVS user makes a call from a BlackBerry device to an extension number within the organization.
- The BlackBerry MVS Client creates a call establishment request, which includes the destination number. The device compresses and encrypts the call establishment request, and sends it to the BlackBerry Enterprise Server over the Wi-Fi network.
- The BlackBerry Enterprise Server decrypts and decompresses the call establishment request, and sends it 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 extension number is internal to the organization and rings the extension number over the organization's LAN.
- The recipient answers the call at a desk phone and voice communication occurs over an RTP connection that the PBX opens between the two endpoints.
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