HylaFAX Enterprise is a full SW solution, (roughly) HylaFAX plus the Dialogic SR140 which does both T.38 (new school fax) and G.711 (old school telephony fax).

HylaFAX Enterprise is a full SW solution, (roughly) HylaFAX plus the Dialogic SR140 which does both T.38 (new school fax) and G.711 (old school telephony fax). But generally it's 14.4k - believe it or not V.34 (33.6k) is still somewhat experimental over IP. And 9600 is usually required to get faxes through to a lot of places, because everyone is trying to do fax over VoIP, and that is generally tough sledding, if it's possible at all.