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>> My Hylafax 4.02 receives pretty faxes but sending doesn't work. >> One error message says: DTE to DC[?]E data underflow [???], > The computer is sending too slowly to keep up with the modem. > 19,200 is the minimum standard speed for most modems. Thanks for this comment. I'm rather new with linux, so I apologize for these questions in advance: Does the error message above mean that the setting in config.ttyS1 ModemRate 19200 is wrong - i.e. I have to set ModemRate to 38400 or 115200 - or do I have to set modem speed via setserial /dev/ttyS1 spd_vhi like I had to in kernel < 2.2.7? ..............Erwin