This is Business::OnlinePayment::PayConnect, an Business::OnlinePayment backend module for PaymentOne (formerly eBillit) PayConnect. It is only useful if you have a merchant account with PaymentOne (formerly eBillit): http://www.paymentone.com/products/paycon.asp . Business::OnlinePayment is a generic interface for processing payments through online credit card processors, online check acceptance houses, etc. (If you like buzzwords, call it an "multiplatform ecommerce-enabling middleware solution").