2007/9/28, srinivas Antarvedi srinivas.antarvedi@gmail.com:
some of my friend suggested to go for B2BUA from vovida.org does anybody using this ? is this real that this can work for prepaid stuff?
It's too outdated. You should look at the asterisk b2bua project instead:
http://developer.berlios.de/projects/b2bua/