Forum OpenACS Q&A: Response to cybercash server simulator
If you use the emulator, you don't have to install any CyberCash software until you're ready to deploy your application.
Unfortunately, the emulator was written for Shoppe, not for the Ecommerce module, which means that the "query" function does not operate correctly. But "query" isn't so important during testing anyway (you'll mainly be simulating charge authorization and settlement). I just wanted to warn you about it in case you see errors.