When communicating with a start-stop device that is supported by the Network Terminal Option (NTO) or the X.25 NCP packet switching interface (NPSI), special data stream characteristics of the non-SNA terminal might need to be specified for use by an application program. You indicate these characteristics by specifying the appropriate value on the TERM operand of the PU or LU definition statement that defines the virtual physical or logical unit. The application program can get information about these characteristics by using the INQUIRE OPTCD=DEVCHAR macroinstruction. It can also get it from the CINIT RU, which is queued when a logon is received from one of these devices.