Is there any GSM or 3G modem card support Windows TAPI

[weggin]

hi:
I use Huawei E169U 3.5G USB modem to test if your TAPI demo code support this device.

Unfortunately it doesn't supported it. It show this message:Device does not support Voice Features


Have you ever seen any GSM or 3G modem device support windows TAPI.

I'am looking for this kind device for a long time.


Thanks.

PS:
Huawei E169U 3.5G USB modem could support voice call via PC's sound device.
it's strange.Why this device doesn't supported windows TAPI ?