Köszönöm a válaszokat.
Módosítottam a wvdial.conf -ot:
Username = ''
Password = ''
nem nem megy föl:
debian pppd[8997]: pppd 2.4.5 started by root, uid 0
debian pppd[8997]: Using interface ppp0
debian pppd[8997]: Connect: ppp0 <--> /dev/ttyUSB0
debian pppd[8997]: CHAP authentication succeeded
debian pppd[8997]: CHAP authentication succeeded
debian pppd[8997]: Modem hangup
debian pppd[8997]: Connection terminated.
debian pppd[8997]: Exit.