Petr Cihlar

I had the same problem. Tried different voice modems. The same results. Dialing ! did not send flash and call was not forwarded. It seems to me that many modems have problems sending dil command when already online. To TRANSFER preference I have put ^MDT! instead of just ! The number I am transfering to I write ^MDT13 instead of just 13. I do not know exactly why it is so, but it works NOW! I hope for you too