Looking for a pay VOIP service

Archived from groups: comp.dcom.voice-over-ip (More info?)

I have an Asterisk server and I want to make the following connection

POTS<----VOIP --- [Asterisk] --- VOIP---->POTS

I am using Asterisk to conference the two pots line.

Think of it like a dating service. Two people both receive calls and then
are able to talk to each other.

There is no telephony hardware installed on this server.

The part I need help with is how I set up an account with the VOIP company
that can deliver the POTS call and charge me per minute?

Thanks,

Bill