Configuring Systems for Terminals, Printers, and Other Serial Devices (32022-90057)

Introduction

Typical Network Configurations

Chapter 1

Extended Switching

By arranging DTCs and DTC terminal connections in a special way, terminal users can

establish communications with most computers or other devices that have an RS-232

interface available. This is referred to as extended switching or back-to-back access.

Figure 1-5 shows two DTCs in a simple back-to-back configuration. DTC 1 has terminals

connected to it. DTC 2 is connected through one of its ports to the RS-232 serial port on

another computer. A terminal user connected through DTC 1 is able to establish a

communications link to the other system by going through DTC 2.

Note that the DTC Management platform is on the same LAN segment as the DTCs

involved in the back-to-back configuration..

Figure 1-5 Extended Switching to another Host

DTC Manager

Platform

Other

Node

DTC 1

DTC 2