FreeSwitch Billing

http://www.carrmin.com/index.php/what-is-carrmin-voip-billing-solution

Faq - What is Carmmin Freeswitch billing Solution? What is Carrmin Billing System? Print Email Carrmin is a Wholesale VoIP Billing System based on the Freeswitch which it supports unlimited Resellers, unlimited Customers, unlimited DID numbers and unlimited simultaneous calls. Using Carmin you can build your VoIP whole sales company. You need to c…