Route PSTN to LAN soft phone

[bolaurent]

I would like to place and receive calls via GV or PSTN with a soft phone on my Macintosh.

I realize that this would be easier to set up with Obiapp, but there is no OSX version.

Is this possible? I am pretty technical, but I find myself overwhelmed and perplexed with the configuration options for telephone.

[bolaurent]

BTW, I have studied http://voxilla.com/2011/02/15/how-to-obify-your-ip-phone-no-asterisk-involved-2623, but still find myself perplexed.