Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

194 Chapter8
Intrinsics Reference
FCONTROL(37)
If issued against a terminal connected via PAD, DTC
Telnet, or Telnet/iX, this call will change the terminal
type setting, but will have no impact on how the device
actually operates. A CCE condition code will be
returned.
This call is unsupported for devices connected via VT. If
used, the VT driver will return a CCE condition code,
but no device control action will take place.
Condition Codes
CCE Request granted.
CCG Not returned by this intrinsic.
CCL Request failed because the process does not own the
logical device, the device is not a terminal, or the speed
or terminal type entered is not supported.
Additional Discussion
See discussions of FCONTROL(11) and FCONTROL(38) in this
manual.