Feature and Technical Overview

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Receiving a PBX-initiated call on a BlackBerry device from an external number

  1. A caller who is external to an organization dials the work number of a BlackBerry Mobile Voice System user.
  2. The PBX creates a call establishment request and sends it to the MVS Session Manager over the SIP line.
  3. The MVS Session Manager filters the request through the receiving BlackBerry MVS user's unknown caller ID setting, call scheduling setting, allowed caller list, and blocked caller list. If the call is permitted, the MVS Session Manager sends the request to the BlackBerry Enterprise Server.
  4. The BlackBerry Enterprise Server compresses and encrypts the incoming call request, and sends it to the wireless network. The incoming call request contains the caller ID information and phone number of the caller.
  5. One of the following occurs:
    • If the BlackBerry device receives the incoming call request, the device decrypts and decompresses it. The device then encrypts and compresses a call establishment response, and sends it to the BlackBerry Enterprise Server. The BlackBerry Enterprise Server decrypts and decompresses the call establishment response, and sends it to the MVS BlackBerry Enterprise Server Connector.
    • If the device does not receive the incoming call request, the MVS BlackBerry Enterprise Server Connector stops responding while it waits for the call establishment response.
  6. The MVS BlackBerry Enterprise Server Connector sends the request to the MVS Session Manager.
  7. The MVS Session Manager, using the SIP trunk, requests that the PBX establish a call to the device using the mobile number.
  8. The PBX sends the call request to the device over the PSTN and wireless network.
  9. The BlackBerry device receives the call. One of the following occurs:
    • If the device receives the call establishment request, the caller ID information from the call establishment request appears on the device.
    • If the ANI matches the ANI in the Telephony Connector Caller Identification Number field of the MVS Console, the call appears on the BlackBerry device as a BlackBerry MVS call.
    • If the ANI matches an ANI in the Telephony Connector Optional ANI numbers available for identifying BlackBerry MVS calls fields of the MVS Console, the call appears on the BlackBerry device as a BlackBerry MVS call.
    • If the device does not receive the call establishment request, the call appears on the device as a call from an unknown number.
  10. The device rings and the BlackBerry MVS user accepts the call.
  11. The BlackBerry MVS Client sends a verification code request to the MVS Session Manager using DTMF tones.
  12. If no ANI value exists in the incoming call, the MVS Session Manager sends a verification code response to the device using DTMF tones. One of the following occurs:
    • If the device receives the call establishment request, the caller ID information from the call establishment request appears on the device.
    • If the device does not receive the call establishment request, the call appears on the device as a call from an unknown number.
  13. If no ANI value exists in the incoming call, and the BlackBerry MVS Client receives the verification code response from the MVS Session Manager, the BlackBerry MVS Client switches the call so that it appears as a BlackBerry MVS call.
  14. The MVS Session Manager connects the SIP line call leg to the SIP trunk call leg, and voice communication occurs.

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