You need to tell us what modem it is (brand, model). Anyway Mitch was right on the link, although today, things are a bit easier.
For telling model of modem, on a console:
Take a look at the output of
lsusb. You should see your modem assigned to ttyUSB* ports:
sudo ls /dev/ttyUSB*
ttyUSB0 - Should be the modem
ttyUSB1 - Should be the USB module
Download a dialer
sudo apt-get install wvdial ppp
Configure your connection
gksudo gedit /etc/wvdial.conf
and use something like the following:
Phone = *99***1#
Username = vodafone
Password = vodafone
Stupid Mode = 1
Dial Command = ATDT
Modem = /dev/ttyUSB0
Baud = 460800
Init2 = ATZ
Init3 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = Analog Modem
You need to set your Phone number, username and password, these are values given by your operator.
Also set the connection on Modem (
The name hsdpa, is generic, you can use whatever name you want.
When dialing your connection, is this name you use.
If using PIN code add this before Init2
Init1 = AT+CPIN=9999
where 9999 is changed for your PIN-code
Start your connection
sudo wvdial hsdpa
hsdpa is the example name i've used, you have to use the one you choosed in wvdial.conf