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SIP gateway process flow: Making a call from a BlackBerry device using Voice over Wi-Fi to an internal number
- A BlackBerry Mobile Voice System user connects to a Wi-Fi network and authenticates with the BlackBerry MVS. The user makes a call from a BlackBerry device to an internal number.
- The device starts a call establishment request, which includes the destination extension number. 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 SIP gateway over a UDP port.
- The SIP gateway sends the call to the PBX.
- 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 between the BlackBerry device and the SIP gateway.
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