This is business::onlinepayment::openecho, an business::onlinepayment backend module for echo. it is only useful if you have a merchant account with echo: http://www.echo-inc.com/ (also see http://www.openecho.com/)

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").