Hi,
I have a weird one. I have two registers sharing a DSL router and every now and then Register 2 won't process credit cards. Internet works, network is fine (the register doesn't go off-line), just stops accepting credit cards. It reads the card but never recieves a response. May do it for a couple of days then start working again.
The whole time it has good internet connection and networking with the other register (where the database is) and doesn't go off-line.
Any thoughts?