iSoftPhone is an easy-to-use Internet phone for OS X; it uses VoIP to provide full compatibility and crystal-clear voice quality in an attractively sleek interface. The quick one-step configuration will allow you to get talking to other users in seconds. iSoftPhone is integrated with the OS X address book to make calls and manage contacts.Simply dial the number of the person you wish to talk with or select them from the Contacts to call. Create private telephone networks by using the option to add multiple SIP providers.With conference calling, voicemail, SMS, call recording and many more features, iSoftPhone is the client of choice for OS X.
