Thanks for the reply vurcos. I don’t know whether I am using H.323 or SIP. I cuurently use the ATA with a provider (Iconnecthere) to make calls to friends etc. Since I call my family in the US often I wanted to be able to call their IP address directly and not go through the provider (i.e. make free calls) but still need to make calls to other people. Is this possible? Or do I have to reconfigure the ATA every time I want to make the call?