It is possible to use some other credit card processors with the Forward Pay credit card readers if they can accept one of the following protocols:
Global Payments East.
Chase Paymentech (Host Capture)
Because of the support involved with using a processor other than WorldPay, Forward Pay will charge a one-time setup fee plus an additional annual fee for online maintenance and monitoring of the credit card reader. These fees are in additional to the fees charged by the processor.