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marcello_dl's Journal: Getting Sony Ericsson MD400 Wireless modem to work

Journal by marcello_dl

First install usb-modeswitch package (debian squeeze - that is, testing at the moment - has it)
Then make sure that the udev initialization is correct:
# Sony Ericsson MD400
#
# This is experimental. Might switch back after some time. Please report!
# This might work too instead; subject to testing
# Vendor:Product id = 0x0fce:0xd0e1
SUBSYSTEM=="usb", SYSFS{idVendor}=="0fce", SYSFS{idProduct}=="d0e1", RUN+="/usr/sbin/usb_modeswitch --default-vendor 0x0fce --default-product 0xd0e1 -O 1"

Then plug the modem in, make sure it doesn't show up as usb disk, then install wvdial.

A working configuration for italian isp wind is the following:

[Dialer Defaults]
Init1 = ATX3
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CFUN=6
Init4 = AT+CGDCONT=1,"ip","internet.wind"
Phone = *99#
Modem Type = USB Modem
Baud = 460800
New PPPD = yes
Modem = /dev/ttyACM0
ISDN = 0
Password = wind
Username = wind

Line init4 must be adapted to your ISP.
It is important to have the init3 line which turns the radio on. 6 means use HSDPA only, other values might be require if you don't have cover or other subscription, but beware the cost and speed. Why does a modem that works only with radio signals need to explicitly turn on its radio is beyond me. Good luck.

Assembly language experience is [important] for the maturity and understanding of how computers work that it provides. -- D. Gries

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