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

Chapter 7 143
Programming for PAD, DTC Telnet, Telnet/iX Server, and VT Devices
Telnet/iX Server Access on MPE/iX Systems
• FCONTROL(22), return last read time.
• FCONTROL(23), disable parity generation and checking.
• FCONTROL(24), enable parity generation and checking.
• FCONTROL(36), define parity setting.
• FCONTROL(37), set terminal type and speed.
• FCONTROL(38), set terminal type.
• FCONTROL(40), determine current speed.
The following FCONTROLs are not supported when the local device is
an HP-UX client:
• FCONTROL(28), disable user block mode.
• FCONTROL(29), enable user block mode.
Use of FCONTROL(27) (enable binary mode) when the local device is
an HP-UX Telnet client, will require the user to set the HP-UX client
into binary (using the HP-UX Telnet client toggle command) before the
FCONTROL(27) is issued to the Telnet/iX Server. If the HP-UX client is
not set into binary before the FCONTROL(27) is issued, the
FCONTROL will return with CCL. The user must disable binary on the
HP-UX client before binary is disabled on the Telnet/iX Server with
FCONTROL(28).
Some caution should be taken when using FCONTROL(4), which sets a
timeout interval for a read. Keep in mind that some delays may be
caused by the network over which your Telnet connection is operating.
In such cases you may want to add some time to the timeout value you
would normally specify for the call.
FDEVICECONTROL
Some FDEVICECONTROLs are not supported for use with Telnet/iX
Server connections. If a program uses an unsupported
FDEVICECONTROL, the Telnet/iX driver will return a CCE condition
code, but no device control action will take place. Any values returned
in these calls may not be a true reflection of device The following
discussion deals with parm1 values with 192 specified as
controlcode.
Unsupported FDEVICECONTROLs include:
parm1 Action
1 Specify terminal type or printer type file
3 Set line speed
8 Return last input time
9, 11 Set parity generation and checking