Hi Deng,

On 20/12/2011 09:44, Deng, Ying An wrote:



We are facing a problem in oFono when using 3G modems:

A CDMA2000 modem can have same PID with WCDMA modem, or TDS-CDMA modem – 3G modem vendors already confirm they do that.

That’s to say, if following current strategy, it will be a problem to install proper driver for this kind of 3G modem.


So, is it feasible to find out a solution such as to probe the modem firstly, find out what kind of network modes it supports, and then install the driver?

The way to probe the modem could be some action as to read the capability or get system mode, or issue some specific AT command that only response to certain network mode?


Indeed, we could use for Huawei modems for instance the AT^SYSINFO command and retrieve the sys_mode field and parse it, I have found this in public Huawei specifications:

<sys_mode>: System mode. The values are as follows:
0 No service.
1 AMPS mode
2 CDMA mode
3 GSM/GPRS mode
4 HDR mode
5 WCDMA mode

Thus we can chose accordingly the drivers to create oFono atoms.

Kind regards,