Upon reading the devnote, starting on page 47 (67 of the pdf): <http://developer.apple.com/documentation/Hardware/Developer_Notes/Macintos h_CPUs-68K_Portable/PowerBook_Duo_System.pdf> it appears to me using the Duo Dock internal modem requires the presence of a modem in the Duo. The chart on page 62 (82 of the pdf) shows all the components in the Duo/Dock combo. Dan K ................................. http://macdan.n3.net/ carracho://dankephoto.dhs.org:9700 hotline://dankephoto.dhs.org:9500 .................................