For our ongoing experiment, we are hoping to tether some laptops onto the EDGE connection, either through a USB style dongle or a USB cord into a phone that allows it to be treated like a modem (And for some old school phones, maybe even a Serial port connection). These situations require a number to be dialed, what I believe is a USSD code, and sometimes a username and password to be entered. I am not talking about newer smart phones where the connection is sometimes shared using advanced drivers. Has anyone been able to do this with OpenBSC?
Chris Rankine
Hi Chris,
I think you are confusing a number of very different things: USSD, CSD/HSCSD and GPRS/EDGE. We do support GPRS+EDGE (marked as experimental). We don't do CSD/HSCSD, and there is no need for USSD in connection to all of this.
There is no problem using our GPRS/EDGE support in _small_ lab installations. Don't put dozens or hundreds of phones at it.
The way you establish the GPRS connection from your phone depends on your phone / dongle. Normally it is oriented closely at the AT command set described in TS 07.07, sometimes with a multiplexer according to TS 07.10.
number to be dialed, what I believe is a USSD code, and sometimes a username and password to be entered. I am not talking about newer smart phones where the connection is sometimes shared using advanced drivers. Has anyone been able to do this with OpenBSC?
On the network side, there is no difference between those two cases. So to OpenBSC, OsmoSGSN and OpenGGSN it does not matter whether you use serial lines, USB or a smartphone that locally terminates the IP and then does something like USB/WiFi tethering. It's all the same.
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Chris Rankine -
Harald Welte