TCP/IP Services supports traditional 3270 mainframe interactive (MFI) applications with an emulator function called Telnet (TN3270). For these applications, all program logic is housed in the mainframe, and the remote host uses only that amount of logic necessary to provide basic communication services. Thus, if your requirement is simply to provide access from a remote TCP/IP host to existing CICS® MFI applications, you should probably consider Telnet rather than CICS TCP/IP as the communications vehicle. Telnet 3270-emulation functions allow your TCP/IP host to communicate with traditional applications without modification.