Hi ,
I am looking for information on USB modem for wireless internet. The information I need are :
1. By what USB class does this USB modem (like TATAindicom Plug2surf)is enumerated.
2. How do they work without a SIM card in it.
3. Is that USB modem similar to mobile with GPRS / How do data transfer occure in case of USB modem for wireless internet.

I haven't got a clue what most of the gibberish in your first two questions is all about.
But if you want to go wireless with a (USB) modem you would need a wireless router between the modem and the wireless network device of the computer.
Due to the laws of probability, I won't say it can't be done. But uuuuuuhhhm.....good luck!

Thanks dude.
but there are USB modem which can be used any where (like in open place), just plug in and you are connected.Now my question is :
1. which way USB modem in (this case) is connected to Telephone Network.
Which technology.
Like our SIM based Telephone is "GSM"
There are some mobles are "CDMA" without SIM.
2. I understand whenever any USB device is Enumerated there is a "class" to it , like Mass data storage , class 08h. etc.
Now what is the 'class' by which a USB modem enumerates.

Thanks once again for ur previous reply.

Any usb wireless modems (as I presume you are talking) require a sims card. Here is a link 'option' recommends from their site

http://www.pharscape.org/index.php?o...ask=view&id=30

If you are talking about tata or reliance wireless modems that are available in India, I guess they are more or less a kind of mobiles.
I had one from reliance that connected to pc on usb port and there was facility to connect handsfree to it and use it to make calls.
It uses the cdma network of the provider for the internet access. So, I assume the data transfer occurs similar to mobile phones.

Thank to all those replied earlier.
Let me tell you my progress:
1. Using "wvdial" utility I was able to connect to the net on PC.
2. Without using wvdial , and using pppd with the chat script is not successful on PC.

Any ways.

Now I am trying to x-compile the ppp for ARM processor in Big Endian format.
Plz help me doing that.
I hv tried this at :snapgear/user/pppd/pppd

after running ./configure


make CC=/usr/local/arm-elf/arm-bin/arm-linux-gcc
/usr/local/arm-elf/arm-bin/arm-linux-gcc -D_linux_=1 -DNO_DRAND48 -DHAVE_PATHS_H -DXDEBUGALL -I../include -I. -DCHAPMS=1 -DMSLANMAN=1 -DMPPE=1 -c -o sys-linux.o sys-linux.c
In file included from /usr/local/arm-linux/sys-include/net/route.h:28,
from sys-linux.c:51:
/usr/local/arm-linux/sys-include/net/dst.h:30: error: parse error before "atomic_t"
/usr/local/arm-linux/sys-include/net/dst.h:67: error: parse error before '}' token
/usr/local/arm-linux/sys-include/net/dst.h:85: error: parse error before "atomic_t"
/usr/local/arm-linux/sys-include/net/dst.h:87: error: parse error before '}' token
In file included from /usr/local/arm-linux/sys-include/linux/sched.h:18,
from /usr/local/arm-linux/sys-include/net/inetpeer.h:14,
from /usr/local/arm-linux/sys-include/net/route.h:29,
from sys-linux.c:51:
/usr/local/arm-linux/sys-include/asm/semaphore.h:18: error: parse error before "wait_queue_head_t"
/usr/local/arm-linux/sys-include/asm/semaphore.h: In function `sema_init':
/usr/local/arm-linux/sys-include/asm/semaphore.h:47: error: dereferencing pointer to incomplete type
/usr/local/arm-linux/sys-include/asm/semaphore.h:48: error: dereferencing pointer to incomplete type
/usr/local/arm-linux/sys-include/asm/semaphore.h:49: error: dereferencing pointer to incomplete type
/usr/local/arm-linux/sys-include/asm/semaphore.h: In function `sem_getcount':
/usr/local/arm-linux/sys-include/asm/semaphore.h:130: error: dereferencing pointer to incomplete type
In file included from /usr/local/arm-linux/sys-include/linux/signal.h:4,
from /usr/local/arm-linux/sys-include/linux/sched.h:26,
from /usr/local/arm-linux/sys-include/net/inetpeer.h:14,
from /usr/local/arm-linux/sys-include/net/route.h:29,
from sys-linux.c:51:........
AND SO ON ....