TrueNetTalk and X-Lite on MacOSX

TrueNetTalk is an VoIP software provided by a telephony company in Thailand.  The package comes with a silly support that provides a client software that can be runned only on Windows.
VoIP is a standard protocol that does not depend on the client software.
A famous VoIP client is X-Lite which has a MacOSX version.
The trick is that you have to use "61.90.255.132".