Ahmed,
Thanks for letting us know about your question on the forums. ActivEngage is not the part that you will need to worry about for this issue. You will need to have an access point with the ability to serve the same number of clients you expect to connect. You will most likely need to consult with your network administrator so they can see if your access point can serve the number you need.
Please let us know if you have any questions.
Thank you,