I did some research back few months ago , and every company have a set limit on their “unlimited long distance”
Most companies clearly say that they will not accept telemarketers as customers.
Most companies will cut you off at around 5000 minutes a month per line.
I they dont do it, people will use them for trunks to get VOIP calls into the U.S..
I agree with Lucke@sky. A quintum tenor or several of them with a good service provide on the U.S.
(betwen 3 cents to 4 cents a minute) will do perfect.
Depends in what you are selling and how much you are making on each call.