SIP gateway process flow: Making a PBX-initiated call from a BlackBerry device to an internal number
- A BlackBerry Mobile Voice System user makes a call from a BlackBerry device to an extension number in the user's organization.
- The BlackBerry MVS Client creates a call establishment request, which includes the destination extension number. The BlackBerry MVS Client compresses, encrypts, and sends the request to the BlackBerry Enterprise Server over the wireless network.
- The BlackBerry Enterprise Server decrypts, decompresses, and sends the request to the MVS BlackBerry Enterprise Server Connector.
- The MVS BlackBerry Enterprise Server Connector sends the request to the MVS Session Manager.
- The MVS Session Manager sends a confirmation response to the BlackBerry device and, using the SIP trunk, requests that the SIP gateway establish a call through the PBX to the BlackBerry device using the mobile number.
- The PBX sends the call to the BlackBerry device over the PSTN and wireless network using the caller ID number of the telephony connector as the ANI.
- The BlackBerry MVS Client receives a call. If the ANI in the incoming call matches the ANI that are specified in the Telephony Connector Caller Identification Number field or the Telephony Connector Optional ANI numbers available for identifying BlackBerry MVS calls fields of the MVS Console, or if no ANI exists, the BlackBerry MVS Client accepts the call.
- The BlackBerry MVS Client sends a verification code request to the MVS Session Manager using DTMF tones.
- If the ANI in the incoming call is empty, the MVS Session Manager sends a verification code response to the BlackBerry device using DTMF tones. The MVS Session Manager, using the SIP trunk, requests that the SIP gateway establish a call through the PBX to the internal number using the extension number.
- 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.
- The MVS Session Manager uses DTMF tones to indicate that the call is connected to the BlackBerry device. The MVS Session Manager instructs the SIP gateway to connect the two call legs, and voice communication can occur.
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