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Eicon Connections for Linux User’s Guide

page 9

The Eiconcard Host PAD and Terminal PAD Driver

The PAD Driver architecture consists of the Host PAD and Terminal PAD drivers running on top

of the Eiconcard driver. These drivers fully emulate tty drivers, so any asynchronous application

written to tty driver standards can function with the Linux PAD drivers.

Eiconcard Host PAD Driver

The Eiconcard Host PAD driver allows remote users to access your Linux server over X.25

connections. Host PAD provides this functionality by implementing the X.3, X.28, and X.29

PAD standards. It therefore allows remote login by users on systems conforming to these PAD

standards over X.25. Host PAD provides the following capabilities:

• Each Eiconcard port can support multiple Host PAD sessions.

• The Eiconcard connects directly to the X.25 network, eliminating the need for asynchronous

modems and an external PAD.

• Remote login capability over highly-reliable X.25 communications links.

The Eiconcard Host PAD driver is a pseudo-driver linked into the Linux kernel. It uses the

services of the Eiconcard driver to access the X.25 protocol running on the Eiconcard. A Linux

as if the connection were on a local terminal. The Eiconcard Host PAD driver also provides

Host PAD device-configuration utilities and files, and includes a driver-configuration utility

(Eiconcard Host PAD Driver Configuration option in eiconcfg).

Note: The Host PAD Driver only receives calls from remote PAD users, it does not initiate them.

The Terminal PAD driver initiates calls to remote hosts over an X.25 network.

Eiconcard Terminal PAD Driver

The Eiconcard Terminal PAD driver enables Linux server users to login to remote systems over

X.25. Each Eiconcard port supports multiple TPAD sessions. As with the Host PAD, the Terminal

PAD provides this functionality by implementing the X.3, X.28, and X.29 PAD standards. It

therefore allows local users to login to any remote systems that conform to these PAD

standards over X.25.

The Eiconcard Terminal PAD driver is a pseudo-driver linked into the Linux kernel. It uses the

services of the Eiconcard driver to access the X.25 protocol running on the Eiconcard. Linux

utilities such as cu and uucp run over the Terminal PAD driver to provide the local user with

terminal functionality. The Eiconcard Terminal PAD driver also provides Terminal PAD

device-configuration utilities and files, and includes a driver-configuration utility (Eiconcard

Terminal PAD Driver Configuration option in eiconcfg).

Note: The Terminal PAD driver only initiates calls from local session users, it does not receive

them. Use the Host PAD driver to receive calls coming in over an X.25 network.

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Eicon Networks S52 Guía de usuario Pagina 11