Well the westell is a router however... It's only a one port router. The only way that your going to be able to connect all three clients to your network is either

A. Go buy a 4 port switch/hub from BestTry and plug the router into one of the 4 ports then the clients in the other 3

Or

B. Invest $55 into a Linksys broadband router plug your dsl modem into the wan port and the clients into the other 3 ports and call it a day.

Hope this helped you.