Introduction
7 User’s Manual - SM202T/SMV23 Modem
Applications
The IG202T/V23 modem is designed for point-to-point and multipoint data communications.
Figure 1-1 shows a typical point-to-point configuration using the IG202T modem and Figure
1-2 shows a typical multipoint configuration using the IG202T modem.
Workstation
Modem
Modem
Remote Terminal
Figure 1-1. Point-to-Point Network Using the IG202T/V23 Modem
Workstation
Modem
Modem
Modem
Modem
Modem
Modem
Remote Terminal
Remote Terminal
Figure 1-2. Multipoint Polling Network Using the IG202T/V23 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 Transmission cable length (pilot wire)
y Network configuration (point-to-point or multipoint)
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