Voip server in ALIX

[binary_dreamer]

hi. i am running pfsense as router/firewall for my soho. it all runs in a ALIX 2d13 with a 1GB cf card
i would like to add the PBX functionality in that box, so i could get rid of my other server running the pbx.
the capacity of calls is no more than 4 concurrent calls. is it possible to add the asterisk or freeswitch package?

if yes, how?