Data Connect DSP19.2 Uživatelský manuál stáhnout pdf (Strana 8)

Introduction

8 User’s Manual - DSP19.2 Fast Poll Modem

Applications

The DSP19.2 modem is designed for point-to-point and multipoint data communications.

Figure 1-1 shows a typical point-to-point configuration using the DSP19.2 modem and

Figure 1-2 shows a typical multipoint configuration using the DSP19.2 modem.

Workstation

Modem

Remote Terminal

Figure 1-1. Point-to-Point Network Using the DSP19.2 Modem

Workstation

Modem

Remote Terminal

Figure 1-2. Multipoint Polling Network Using the DSP19.2 Modem

There are a number of factors that can affect the modem’s operation and performance.

These include:

y Modem speed (i.e. bit error rate, transmission line distance)

y 2-wire or 4-wire configuration

y Transmission line characteristics, noise, and line impairments

y Network configuration (point-to-point or multipoint)

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Data Connect DSP19.2 Uživatelský manuál Strana 8