Optelecom 9525A, Инструкция по установке и эксплуатации

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2 - INSTALLATION
2.1 System Architecture
The Model 9525A can be configured into three basic network architectures. To configure the network, the modems
may be set to operate in one of four modes, characterized mainly by the internal signal routing within the modem
among the data port, the RS232 expansion port, and the two optical transmitter/receiver ports.
In addition to the routing of the data signals within the modem that characterizes its mode of operation, there are
several other operational features that are important to know. Some of these features are inherent, some are
optional, and others are absent depending on the mode of operation.
The Model 9525A can be configured into various basic architectures. They include:
a) Simple Daisy Chain
b) Daisy Chain with branches
c) Fault Tolerant Redundant Ring
2.1.1 Simple Daisy Chain(s) With this architecture, the master controller lies at the end of one or two daisy
chains. See Figure 2. Note that the TX1 and RX1 ports always connect toward the master modem.
2.1.2 Daisy Chain(s) with Branches When operating in RS232 mode, the RS232 expansion port may be used to
establish additional daisy chains or branches from any of the modems in the system. To do this, connect a
Model 9525A in RS232 mode to the RJ45 expansion port of another Model 9525A, set the unit for Master
Daisy Chain operation and connect other daisy chains to it in the same way they are connected to the
primary master.