ISP Billing software helps you offer free trial Internet access and convert your customers into paid subscribers.
Entire process is automated, and follows the rules you specify: duration of the free trial, number of logins per day, available bandwidth quota, download and upload rate, time of day when free access is available, and much more.
Once the customer is satisfied, he can sign-up for the higher level account without restrictions.
Ability to offer paid upgrade is very important, as business users or those needing video streaming will not be satisfied with your free-level service. On contrary, users needing only simple services as browsing or Email access would appreciate a free offer, and be loyal to your main services.