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PAD Services

X.3 Parameter Descriptions

Chapter 6 165

the current X.3 setting is overwritten on the server. A set command is

sent to reset the parameter in the remote PAD. If x29server cannot map

the terminal I/O parameter to X.3, the request is processed as a normal

terminal I/O ioctl().

When x29printd and x29server transform terminal I/O parameters

into X.3 parameters, they intercept the ioctl (tcseta) call and send an

X.29 set command with new X.3 parameter values if necessary. The

related X.3 parameters are: 2 (echo), 3 (data forward), 4 (idle timer), 5

(device control), 12 (flow control), 15 (editing), 16 (character delete), and

17 (line delete).

The x29server process downloads only those X.3 parameters that are

specified in the x3config file for a particular remote system. The

x29print process always downloads a set of X.3 parameters (if they exist

in the x3config file) at the beginning of a connection, or the default X.3

parameters (given in the preceding table) if the X.3 parameters do not

exist in the x3config file.

The X.3 parameters for padem can be changed by an X.29 set message

from the remote host or by the terminal operator with a set command.

Default X.3 Parameters

If the x3config file does not have a definition for a particular device, the

defaults (listed in the next section) are used. See Appendix B, X.25

Configuration Files and Examples, for an example of the x3config file.

X.3 Parameter Descriptions

The following pages contain a description of X.3 parameters 1 through

22. The default X.3 parameters vary for each PAD service.

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HP CommonIO Products Bedienungsanleitung Seite 165