They might work with a VOIP line that will send faxes at 14,400. There is a special codec that is designed for FAX use (T.38). Some VOIP carriers implement T.38 and some do not. Comcast probably does not. -D From: Kevin Kidd <kkbroadcastengineering at gmail.com> Anyone had success running a BB thru a Comcast voip line? Other thoughts?