If you are using VOIP ( AT&T, Magic Jack, phone service from cable) you may need a pulse to tone converter to make calls - if your payphone has a rotary dial. I guess it depends on your tel-co provider, I needed one for AT&T, qa my buddy had to getone on magic jack, but I've heard WOW works with out it
http://www.dialgizmo.com *
If you're going to have a booth, may as well use it all the way
* I have no financial or personal gain from mentioning this site. I bought my converter from them and was happy with the purchase