Modem 56K to Modem GPRS

onim1978 · 06-28-2010, 07:09 AM

Hy,
i have a PC (PC_A) Linux Embedded sistem (with arm linux) with a modem GPRS. In this system there is a pppd demone and a getty program (only getty)!

The second PC (PC-B) is a linux PC(debian lenny ) with a 3com usrobotic 56k modem.

I want to connect PC-B directly to PC-A.

I had test to connect with minicom calling from PC-B the PC-A with AT command and the connection is OK, but i dont view the connection in route table.

I want to know how i must to connect the PC-B to PC-A? I must to transfert a small file from PC-A to PC-B.

thanks....

halvy · 06-29-2010, 04:42 AM

Good question.. I'v always wondered how to use a modem(s) as a regular network device.. locally..

Which is what I gather you are trying to do?

The only thing I could suggest.. even tho I have never researched it much.. is to have a server setup on the side you want to dl info from.. like an ftp server..

Good luck.. lettuce know..

halvy · 06-29-2010, 04:44 AM

sorry.. double post by accident

onim1978 · 07-01-2010, 03:23 AM

hy,
the problem is not the server to trasmit file. My problem is that i establisced a connect between two PC if I use minicom but my connect do not create a route entry in the route table. So i dont to transfert the file.

thanks

halvy · 07-01-2010, 05:15 AM

Maybe try another program.. mgetty? or use bluetooth to transfer the file? or wammu?

Why is it important for the the pc-a to show up in the routing table? This seems like more of a 'direct connect' than a regular modem or network situation.. no?

onim1978 · 07-01-2010, 05:20 AM

hy,
the problem is that che PC-A is an embedded PC with ARM linux! There isn't ugetty! There are only getty e pppd.

the second problem is that i must call from PC-B ... because i must change the time when i create a connection (i can't use cron to create the connection from PC-A to PC-B)!

thanks

john test · 07-04-2010, 10:14 AM

I know you can do Packet Radio over an RS 252 connection and you can do Packet radio over a wireless 2G network, but it seem like you would need to do some conversion to get the two networkds to talk together.
Do you have a GPRS driver of some sort for the US Robotics Modem to make it 2G compatible

TimothyEBaldwin · 07-04-2010, 03:09 PM

There seems to be some confusion here. Mobile network operators generally do not provide a GPRS <-> public telephone network gateway, Internet connections are provided via GPRS.

You can either use GSM circuit switched data (not GPRS) to a dial-up modem, or a GPRS Internet connection to some other Internet connection, which could be dailup connection.

If you want a circuit switched connection you can use chat and pppd together.