Asterisk for telephony with modem

Hi,
could i use Asterisk to make a phone call with my Elsa 56k Modem ?
Which libs should i use ?

thanks

So if is it not possible to do it, can i use a ISDN PCI card to make a phone call ? Which tools could do this ?

For hardware that will work see here.

voip-info.org/wiki/view/Asterisk+hardware