call the follwing commands:

rmmod usb-storage
rmmod usb-serial

to unload the storage device, then call:

lsusb

Then you can see the vencor id and product id

and write down the vencor id and produc number of the attached device, then call

modprobe usb-serial vendor= product=

unplug the device, replug again and check that there are three usb devices calling:

ls -la /dev/ttyU*

ttyUSB0
ttyUSB1 .....................something like that

Create a new file /etc/ppp/peers/hsdpa, hsdpa-connect, hsdpa-disconnect


1. hsdpa

#the USB serial device of the EVDO PCMCIA card.
/dev/ttyUSB0
#your login information
user sktelecom
921600 # speed
#debug
defaultroute # use the cellular network for the default route
usepeerdns # use the DNS servers from the remote network
-detach # keep pppd in the foreground
crtscts # hardware flow control
#lock # lock the serial port
noauth # don't expect the modem to authenticate itself
connect "/usr/sbin/chat -v -f /etc/ppp/peers/hsdpa-connect"
disconnect "/usr/sbin/chat -v -f /etc/ppp/peers/hsdpa-disconnect"

2. hsdpa-connect
#time out is 20 because sometimes the card takes a little while to initalize
TIMEOUT 20
ABORT 'BUSY'
ABORT 'NO ANSWER'
ABORT 'NO CARRIER'
SAY 'Starting HSDPA Connection\n'

'' 'AT'
'OK' 'ATQ0V1E0'
'OK' 'ATZ'
'OK' 'AT&F'
# Dial the number
SAY 'Connecting...\n'
'OK' 'ATDT*98#'
CONNECT CLIENT

3. hsdpa-disconnect
"" "\K"
"" "+++ATH0"
SAY "Disconnected from HSDPA."

[출처] HSDPA Linux 사용(CHU-628S)|작성자 인자요차

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