Making a
BlackBerry device–initiated call from a
BlackBerry device to
an internal number
- A caller within an
organization uses a
BlackBerry device to dial the extension number
of another
BlackBerry Mobile Voice System user.
- The
BlackBerry MVS Client creates a call establishment request, which includes the
destination number. The
BlackBerry MVS Client compresses and encrypts
the call establishment request, and sends it to the
BlackBerry Enterprise Server
over the wireless data network.
- The
BlackBerry Enterprise Server decrypts and
decompresses the call establishment 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.
- The
MVS Session
Manager sends a
confirmation request to the device. The confirmation request includes the
DID/DDI number that the
BlackBerry MVS Client uses to communicate with
the
MVS Session
Manager.
- The
BlackBerry MVS Client uses the wireless voice
network to make a call to the PBX using the DID/DDI number.
- The PBX routes the call to
the
MVS Session
Manager over the SIP
trunk using the DID/DDI number.
- The
MVS Session
Manager answers the
call to the DID/DDI number.
- The
MVS Session
Manager and the
BlackBerry MVS Client use a two-way protocol
to authenticate the call.
- The
MVS Session
Manager verifies the
call and requests that the PBX make a call to the extension number using the
SIP line.
- 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.
- The
MVS Session
Manager uses DTMF tones
to indicate to the device that the call is connected to the extension number.
The
MVS Session
Manager connects the
SIP line call leg to the SIP trunk call leg, and voice communication occurs.
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