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CHAPTER

Introduction

Features

The ESP 4-port Multi-Interface (ESP-4 MI) serial hub contains an autosensing 10/100 Ethernet

port and four multi-interface serial ports. Each port may be configured to use the RS-232, RS-422

or RS-485 interface.

Modular adaptors are available to facilitate the connection between the ESP-4 MI serial hub and the

target devices.

The ESP-4 MI hub uses an external power supply, which is provided with the hub. See Electrical

on page 8 for more information.

Serial port access

All ESP-4 MI hubs support several ways to access the serial ports. Each of these connection

methods is described in Chapter 3, beginning on page 11.

• Serial port redirection

• Telnet server

• Raw TCP server

• Raw TCP client

• Modem emulation

• Configuration utility

Serial port redirection uses drivers installed on a host computer. The ESP-4 MI serial hub drivers

are supported on the following operating systems:

Windows

2000 Windows XP

Windows NT

4.0 Windows Server 2003

OpenServer™ 5.0.5a or higher UnixWare

7.0.1a or higher

Linux

AIX

4.3 and 5.1/5.2

Sun

Solaris

™

for X86 or SPARC 8 or higher

For serial port redirection, the ESP-4 MI hub is configured using the appropriate drivers running on

any Microsoft Windows host, or espdiag and espcfg for OpenServer, UnixWare, Linux, Sun or

AIX systems. Certain configuration values are set during driver installation.

Avocent ESP-4 MI User Manual

Questions and Answers: