To see why we're so excited about our CSB software, download and test our FREE DEMO VERSION today:
CallExchange's mission is to provide the most sophisticated VoIP service through the simplest interface, giving ordinary people worldwide access to the highest quality telephony available.
CSB is a complete stand-alone billing system which also operates seamlessly with CallExchange's unique web-based hosted turnkey solution.
Offer prepaid calling cards
Offer prepaid calling cards and/or set up a call shop. Our CSB software enables you to offer any combination of the following:
PIN code authenticated calls
PIN code authenticated calls via PSTN access. Customers call a designated PSTN line, enter their PIN code and call.
Call shop prepaid or postpaid
Call shop with prepaid or postpaid billing. The customer enters a booth and the cashier opens a line. The connection ends automatically when the balance/credit reaches zero.
Call shop PIN codes
Call shop with prepaid PIN codes. In this scenario the customer pays in advance and receives a PIN code. He enters any vacant booth, enters his PIN code, and calls.
Offer prepaid calling cards 
PIN code authenticated calls
Call shop prepaid or postpaid
Call shop PIN codes