BL4 is the best billing software ever for Infinity.This product is sold by Amtelco.Contact your Amtelco sales representative for more information on purchasing it and please tell them you were referred by us.Bl4 is a marvelous product and has many many features that all help you be more flexible and competitive when you sell your services and more profitable when you invoice for the services after the sale. Our team of experts can help import your billing data from your previous software, assist in the set up, make recommendations and more. With a one time consultancy fee here you will get a great ROI on your investment as you continue to bill and report to your clients month after month. We have client success stories about companies who have increased their monthly revenue by using this billing software and have improved their bottom line. We can supply Implementation information, Process documentation, Month end step by step procedures and any other support that the users think pertinent.