Micro-Aide LDM-1 Manual de usuario descargar pdf (Pagina 15)

Setup and Installation - Network Types

NETWORK TYPES

The LDM-1 has several options and performance settings that can be config-

ured by the user. Equalization, line termination and timer settings are among

the various items. Before the LDM-1 can be properly set up the type of net-

work that will be used must be understood and selected. The LDM-1 is

designed for use in point-to-point and multi-drop networks. They are

described in the following two sections.

OINT-TO-POINT

The point-to-point network is the simplest of the two configurations. It is

characterized by a two-pair cable and a single modem at each cable end. The

cable pairs are referred to as Xmt and Rcv for transmit and receive, respec-

tively. Figure 3 on page 10 illustrates a typical point-to-point network.

The proper LDM-1 setup configuration for a point-to-point network is as fol-

lows:

• The Xmt and Rcv Terminations for both modems must be set to On.

• Since only two modems are used, the RTS signal of each modem can be per-

manently asserted. Refer to the section entitled “Permanently Asserting the

RTS” on page 15.

• The end-to-end cable length must not exceed the recommendations as listed

in Table 5 on page 30 for the given cable diameter and selected Baud rate.

• The Equalization setting for both modems must be identical and set in

accordance with the recommendations as listed in Table 6 on page 31.

WARNING: The LDM-1 cannot be used in a star network configuration

involving spoke lengths that are greater than 100ft.

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Micro-Aide LDM-1 Manual de usuario Pagina 15