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

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142 Chapter7

Programming for PAD, DTC Telnet, Telnet/iX Server, and VT Devices

Telnet/iX Server Access on MPE/iX Systems

For details on using the Telnet/iX Client and Server on MPE/iX

systems, as well as information on the Telnet/iX Client commands, refer

to the HP Telnet/iX User’s Guide. For more information on conﬁguring

Telnet/iX, as well as more general information on Internet Services,

please refer to Conﬁguring and Managing MPE/iX Internet Services.

What’s Included

This section includes information on:

• Limits and restrictions that apply to Telnet/iX Server connected

devices.

• Recommended programming practices for Telnet/iX Server support.

General Telnet/iX Server Restrictions

• Only sessions, not jobs, can be established on the MPE/iX system by

the local Telnet client.

• Although you may use the MPE/iX CONSOLE command to switch

the console device to a previously connected Telnet/iX Server Ldev,

[CTRL]-a and [CTRL]-b functionality are not supported on Telnet/iX

Server Ldevs.

• Use of customized terminal types is not supported.

• Many FCONTROL and FDEVICECONTROL intrinsics, including

all block modes, require the use of a 2392 compatible terminal

emulator on the Telnet client side.

Telnet/iX Server Programming Considerations

The following provides details on the limitations of ﬁle system

intrinsics used to control devices connected to an MPE/iX system via

Telnet/iX. For more information about the following intrinsics, refer to

Chapter 8, “Intrinsics Reference,” of this manual.

FCONTROL

Some FCONTROLs are not supported for use with Telnet/iX Server

connections. If a program uses an unsupported FCONTROL for a

Telnet/iX connected device, 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 control

settings. These FCONTROLs include:

• FCONTROL(10), set line speed.

• FCONTROL(11), set line speed.