$ whoami
root
$ eject /dev/sr1 # /dev/sr1 contains setup for win/mac
$ ls /dev/ttyUSB*
ls: cannot access /dev/ttyUSB*: No such file or directory
$ modprobe usbserial vendor=0x15EB product=0x7152
$ ls /dev/ttyUSB*
/dev/ttyUSB0
/dev/ttyUSB1
/dev/ttyUSB2
/dev/ttyUSB3
$ cat /etc/wvdial.conf
[Dialer Defaults]
init1 = ATZ
init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Stupid Mode = 1
Modem Type = Analog Modem
ISDN = 0
Phone = #777
Flow Control = Hardware (CRTSCTS)
Modem = /dev/ttyUSB2
Username = 'username'
Dial Command = ATDT
Password = 'password'
Baud = 9600
$ wvdial
--> WvDial: Internet dialer version 1.61
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Modem initialized.
--> Sending: ATDT#777
--> Waiting for carrier.
ATDT#777
OK
CONNECT 3100000
--> Carrier detected.  Starting PPP immediately.
--> Starting pppd at Sat Jul 14 19:21:16 2012
--> Pid of pppd: 10884
--> Using interface ppp0
--> pppd: �[7f]
--> pppd: �[7f]
--> pppd: �[7f]
--> pppd: �[7f]
--> Disconnecting at Sat Jul 14 19:21:19 2012
--> The PPP daemon has died: Loopback detected (exit code = 17)
--> man pppd explains pppd error codes in more detail.
--> I guess that's it for now, exiting
--> The PPP daemon has died. (exit code = 17)