I went to Expert Config, unchecked the Obitalk default, checked the box directly underneath X_DnsSrvAutoPrefix and unfortunately there's no change. Viatalk service suggested I install a program called Zoiper on my PC and when I did this I can make calls through Viatalk. However, I don't want to be tethered to my PC.
Is it possible that the phone functionality in my Linksys RT3IP2 Broadband Router simply died while all its other functions seem fine? The phone LED light don't come on any longer with the set-up I've been using for a few years. As you can probably tell, I'm not a router or VOIP expert by any means.