Call direction determines how the setup of the media path between the PBX and the BlackBerry® device is initiated for Voice over Mobile calls. You can configure the BlackBerry MVS to use PBX-initiated or device-initiated call direction. Call direction can be configured for incoming and outgoing calls. For call direction, incoming and outgoing are with respect to the BlackBerry device.

• PBX-initiated call direction
  
• BlackBerry device–initiated calling