Anyone knows the PortSIP VoIP SDK works fine with Asterisk?

Hi everyboy, I’m a newbie of VoIP development, does there has any one knows the PortSIP Voip SDK( is compatibles with Asterisk ? Does it working fine with Asterisk ?

My boss want to pucharse this SDK and let me develop a SIP softphone base on this SDK, our company using the Asterisk and Open SER, so I want to know who’s knows about this VoIP SDK? I just worry about it hasn’t good compatibility with Asterisk.