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Eicon Connections for Linux User’s Guide

page 27

Testing Eiconcard Host PAD Devices

Once the system has been rebooted and is running in multi-user mode, you should test an

Eiconcard Host PAD connection as follows:

1. Load the Eiconcard manually if it is not already loaded:

# eccard start

2. Issue the eccard status and hpad commands to verify that the port(s) assigned to your

Eiconcard Host PAD tty devices are active. Use the hpadcfg -p command to reconfigure

the devices if necessary.

3. Using a text editor, edit /etc/inittab to enable the Eiconcard Host PAD tty devices. Enable

the devices by changing the off parameter on the desired Eiconcard Host PAD device lines

to respawn.

4. Use the init command to advise the system that /etc/inittab has been changed:

# init q

The Eiconcard Host PAD tty devices are enabled for this session only. Steps 2 and 3 must

be done each time you rebuild your kernel.

Note: Eiconcard Host PAD tty devices are disabled by editing /etc/inittab and changing the

Eiconcard Host PAD device respawn flags to off.

You can test both the Eiconcard Host PAD Driver and the Eiconcard Terminal PAD Driver by

connecting the two together over an actual X.25 network.

Two Eiconcards, or one multi-port Eiconcard, may be connected back to back, so that X.25

communications is used without the need for connection to an X.25 network. A null-modem

cable must be connected between the two ports. In addition, one port must be set up as DCE

with internal clocking and line speed set, and the other as DTE with external clocking.

Once the Eiconcard Host PAD driver is properly installed and at least one device has been

tested, the Eiconcard Host PAD tty devices are ready to be used. Several Eiconcard Host PAD

commands are provided for configuring Eiconcard Host PAD devices and checking their status.

For more information on these commands, see the online documentation. For information on

accessing online documentation, see

For More Information on page 13.

stty/X.3 PAD Parameters

The Linux stty command allows the Eiconcard Host PAD to change the setup of the remote

Eiconcard Terminal PAD when the two are connected over an X.25 network.

Parity generation and checking is implemented in only the Eiconcard Host PAD driver. No X.29

packet is sent to the Eiconcard Terminal PAD to set parameter 21. If the terminal must use a

7-bit word size and even parity, set the Eiconcard Host PAD to use the stty settings cs7

parenb -parodd.

Using tpad with cu and uucp

This section provides information on the configuration of the Eiconcard Terminal PAD for use

by the Linux commands cu and uucp. Several examples that demonstrate the use of cu and

uucp for making calls to a remote system are also included.

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Eicon Networks S52 Guía de usuario Pagina 29