1. A system to emulate a mainframe channel for testing and diagnostics of mainframe peripheral devices and for remote control and configuration of testing and diagnostics of said mainframe peripheral devices, which system comprises: an emulator central processing unit communicably attached to a mainframe channel switch which, in turn, is connected to a control unit which, in turn, is connected to at least one of said mainframe peripheral devices; wherein said emulator central processing unit operates independently of any mainframe computer; first device driver software resident in and processed by said emulator central processing unit to initialize and start at least one adapter for said at least one of said mainframe peripheral devices; second channel program software resident in and processed by said emulator central processing unit with commands to said emulator central processing unit and to said mainframe peripheral devices; third application software resident in and processed by said emulator central processing unit to test and diagnose said mainframe peripheral devices; and fourth software to validate remote access between said emulator central processing unit and a remote administration central processing unit communicably attached thereto.