bandwith required for the user

hi friends

1 What is the Bandwith required for 50 concurrent ep users connecting from a remote to a centra instance ?

2 What is the Bandwith required for the most Bandwith extensive transaction ?

3 What is the maximum no of concurrent users the system can handle ?

4 What is the maximum no of transaction the system can handle at a given instance ?

can anyone help me out to know the answers

regards

raja