Echo java class Transaction Processor is a multi-platform compatible script that drives all types of real-time credit card and check transactions using ECHO merchant processingls free secure payment gateway and open-source real-time software. Supports system check, address verification, authorization and deposit, deposit, credit, electronic check debit, and more. Ideal for all commerce applications. Perfect for ISP/IPPs to use for billing their clients, since this supports electronic checks as well.