Someone send me an email concerning the topic of the Ubject line, which I no longer can find. Just resend if necessary. But the solution is to compile your own ALSA competent slmodemd for support of the SIL27 codec modem. 1) install the package libasound2-dev , required for the ALSA competent install 2) from http://linmodems.technion.ac.il/packages/smartlink/ download the slmodem-2.9.11-20080417.tar.gz unpack and move into the modem/ subfolder. Then do: # make clean # make SUPPORT_ALSA=1 Then replace your current /usr/sbin/slmodemd MarvS