Tapan, With the 537EP driver uninstalled, can you send me the output of (ttyS1 ought to be the serial line handled by the 8250_pci (aka serial) driver): $ stty -F /dev/ttyS1 -a $ efax -d /dev/ttyS1 Thank you in advance. - http://vouters.dyndns.org:8080/ Philippe Vouters (Fontainebleau/France) > > It also does work with stty and efax. However efax gives a modem not > responding after some time