The coax and twinax adapters for SCS are options that provide the SNA Character String (SCS) data stream and either a twinaxial or coaxial connection for printers. For the coax attachment, DSC/DSE datastreams are also supported. ??With the appropriate option installed in the printer, it will emulate an IBM host-workstation printer and print from IBM legacy applications running on an AS/400, System/36, System/38, System/370 or System/390 computer.