Multipe analog phones behind one TDM400P FXS port?

I want to learn more about Asterisk and VOIP, but the budget is tight. I plan to put a TDM400P with one FXS and one FX0 port between the POTS line and my 5 phones. So the question is will the FXS port support the load? I know the impedence of each phone can differ, so what are the specs on the FXS modules so I can calculate this?