Forum OpenACS Development: virtual classroom based on OpenACS and dotLRN

We are looking for a solution for Virtual classroom (online conferencing)based on OpenACS and dotLRNõ.
Our specific requirements are:
·    Turnkey project much preferable.
·    Virtual classrooms (online conferencing) platform turnkey
·    The platform support voice, text and whiteboard
·    Link to our web site
·    Only registrations users can enter to classroom.
·    The users login by username and password
·    Indication of open/close classrooms
·    Indication who is talking now and who wants to talk.
·    Test for microphone and speakers
·    The Teachers would logon as a moderator and would be able to mute
      students, ban users, or terminate connections.  The moderator can also
      Override the queue.
·    The rooms can be setup to be automatically muted
      When there is no moderator present.
·    Sharing application, and can share MSPaint to act as a whiteboard.
·    Reports of the systems - as much as possible specially the duration time of users

You are therefore requested to send us, your solution, as well price quotation.
We will happy to make live conversation with you.
We are look forward to achieving profitable business relationship for both of us for a long period.

Your early answer is much appreciated.

Thanks & best regard,

Eliz