You need to be subscribed to a voip service provider. Than you need to enter the following information into the softphone: -Provider domain name or IP address -Your username (this can be a normal phone number) -Your password (you will get all this informations from the service provider) That's all, you can begin to call. For example if you use <a href="http://www.mizu-softphone.com/Download.aspx"> Mizu Softphone </a>, than you simply go to File Menu -> Basic Settings, enter this informations, hit the save button and start calling.

You need to be subscribed to a voip service provider. Than you need to enter the following information into the softphone: -Provider domain name or IP address -Your username (this can be a normal phone number) -Your password (you will get all this informations from the service provider) That's all, you can begin to call. For example if you use <a href="http://www.mizu-softphone.com/Download.aspx"> Mizu Softphone </a>, than you simply go to File Menu -> Basic Settings, enter this informations, hit the save button and start calling.