how to connect Tata Docomo USB modem in Lucid

[Tapas Mishra]

On Sun, Jul 24, 2011 at 3:27 PM, Tapas Mishra <mightydreams at gmail.com> wrote:
> On Sun, Jul 24, 2011 at 12:48 PM, Abhishek Dixit <abhidixit87 at gmail.com> wrote:
>> 2011/7/24 সাজেদুর রহিম জোয়ারদার <toshazed at gmail.com>:
>>> Dear Abhishek
>>>
>>> I am 'ring', trying to resolve your Tata Docomo connection problem.
>>>
>>> May I have some screenshots of your system and the workflow that you are
>>> doing. Such as setting up the connection, trying to connect, failed msg etc.
>>>
>>> Plese upload the pics into your picasa account and share the links here as
>>> though mailing list didn't allow attachments.
>>>
>>> With regards
>>> --
>>
>> Thanks Ring I am describing all the steps starting from scratch
>>
>>
>> Step 1)
>> I bought a USB modem and lsusb shows
>> Bus 002 Device 002: ID 05c6:9000 Qualcomm, Inc.
>>
>> Step 2) Following is /var/log/messages when I connect the USB modem (
>> usb-modeswitch was not present when I connected initially )
>>
>> http://paste.ubuntu.com/651054/
>>
>> Step 3) Now I after some Googling came to know  i usb-modswitch so
>> installed usb-modeswitch (via synaptics)
>> and connected the USB modem to laptop the color of light  changed green
>>
>> Step 4) and /var/log/messages after usb-modswitch was installed
>> http://paste.ubuntu.com/651053/
>>
>> Step 5) and lsusb showed
>>
>> Bus 002 Device 003: ID 05c6:9000 Qualcomm, Inc.
>>
>> Step 6)  but I noted here even after installing usb-modswitch the config file
>>
>> /etc/usb_modeswitch.d/05c6\:9000
>>
>> was missing so I created the file  as given on following link
>> https://bbs.archlinux.org/viewtopic.php?id=93562
>>
>>  the file /etc/usb_modeswitch.d/05c6\:9000  contains
>>
>> DefaultVendor=  0x05c6
>> DefaultProduct= 0x9000
>>
>> TargetVendor=   0x05c6
>> TargetProduct=  0x9000
>>
>> MessageContent="5553424312345678000000000000061b000000020000000000000000000000"
>>
>> (can also see it here http://paste.ubuntu.com/651056/)
>>
>> and I verified it ,if it is working by following command
>>
>>
>> Step 7)
>> root at bond:~# usb_modeswitch -W -c /etc/usb_modeswitch.d/05c6\:9000
>> the output of above command is
>> http://paste.ubuntu.com/651057/
>> and the problem of above output I note is line no 110,111
>>
>> USB error: error sending control message: Broken pipe
>> Error: could not get description string "product"

This error can be over come via using
TargetClass=0xff

 you better do not give TargetVendor and TargetProduct but rather the
class of the device after switching (initially it's "0x08"):


This will prevent usb_modeswitch from running twice which it did with
your configuration, removing the serial driver again.

So your  /etc/usb_modeswitch.d/05c6:9000 should look like

DefaultVendor= 0x05c6
DefaultProduct=0x9000

#TargetVendor= 0x05c6
#TargetProduct= 0x9000
TargetClass=0xff

CheckSuccess=20

MessageContent="5553424312345678000000000000061b000000020000000000000000000000"

>> Step 8)
>> Now being sure of the fact that modem has been detected on my system
>>  I did
>> modprobe usbserial vendor=0x056c product=9000
>>
>> Step 9) As per this blog
>> http://ershadk.wordpress.com/2010/03/30/connect-tata-docomo-internet-in-ubuntu-9-04/
>> I had created a new connection in
>> System-->Preferences-->Mobile Broadband-->Add ----here I had added Tata Docomo
>>
>> you can see the corresponding snapshots here
>> https://picasaweb.google.com/107404068162388981296/MicromaxMmx372GUsbModemConnectionProblem
>>
>>
>> the connection option in antenna applet for this new mobile broadband
>> connection on system tray did appear
>> but upon selecting it was not able to connect to internet.
>>
>> Without installing usb-modeswitch this option was not coming.So I
>> think some thing did  proceded but not fully.
>>
>>
>>
>> I have also tried using wvdialconf and wvdial and they have also not
>> been able to work.
>> The wvdialconf output was following
>> http://paste.ubuntu.com/651058/
>> wvdial.conf by above was ----> http://paste.ubuntu.com/651061/

and in your case /dev/ttyUSB1 is just for measuring quality of signal
so try with /dev/ttyUSB2 or some thing else.
your wvdial.conf should like following

[Dialer Defaults]
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = USB Modem
Phone = *99***1#
ISDN = 0
Username = " "
Password = " "
Init1 = ATZ
Init3 = AT+CGDCONT=1,"IP","TATA.DOCOMO.INTERNET"
Modem = /dev/ttyUSB2
Baud = 9600
Auto DNS = 1
Dial Command = ATDT
Carrier Check = yes
Stupid Mode = 1


note I have added Init3 commands which are not present in your file.
After this use following commands

1) usb_modeswitch -W -c /etc/usb_modeswitch.d/05c6:900
2) modeprobe usbserial vendor=0x05c6 product=0x9000
3) wvdial
run all these commands as root
and I hope you will get connected let me know the output of /var/log/messages
if any of the above steps I told you fails.
------------------------------
Regards
Tapas
http://mightydreams.blogspot.com