I’ve been using the ever-so-useable WengoPhone VOIP software, and I wanted to see if there was a public SIP address that i could provide to people on other SIP networks. Well, it took me a while to figure out, but there is. Just enter sip:firstname.lastname@example.org into any SIP phone and you’ll be cooking on gas. I tested this from Ekiga running on another computer and Wengo received the call just like normal.
BTW my Wengo username is ‘werkshy’.