I was getting a 2-4 second delay with voice conversations, and I got lucky with a tech at magic jack. First they had me hard code their DNS servers, but I don't think that did the trick. Below is the rest of the conversation:
anice: Click Start tab and open your control panel. Go to internet options.
craig: ok
Janice: Under privacy tab, slide the bar down to "allow all cookies".
craig: ok
Janice: Under security tab click on "trusted sites" then click the "sites" button. Type the following address into the text bar.. https://reg.talk4free.com click the "add" button.
craig: done
Janice: Now type in the following address.. https://my.magicjack.com and click "add".
craig: done
Janice: Uncheck the box at bottom left of window that says "require server verification..." Then click "close" then click "apply" close the internet options by clicking "Ok".
craig: done
Janice: Please restart your magicJack by clicking on the “Menu” then “Advance Users” then “Restart”.
craig: done
Janice: Please try making a test call.
craig: ok. hold on
Janice: Sure. no problem.
craig: great thanks
Hope this helps people. If you can get magic jack working, it's a great deal.
delay[SOLVED]
Moderators: Bill Smith, Pilot