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Chapter 1:
Introduction
1-4 FOMIM User’s Guide
1.3.2 Multi Media Access Centers
The Cabletron Systems Fiber Optic Media Interface Modules are
designed to be installed into the Cabletron Systems Multi Media Access
Center (MMAC). The modular design of the MMAC allows the FOMIM
to co-exist with other Media Interface Modules (MIMs) to provide a
variety of different media connections on any one point.
Each packet entering the FOMIM is repeated by the repeater module in
the MMAC. Each packet that enters the repeater module is regenerated
and retimed, which assures data integrity and maximum data path
distance. In addition, the repeater feature ensures fault isolation, because
the repeater module automatically segments problem ports from the
network. A segmented port automatically reconnects to the network once
the port receives a good packet.
The repeater module also allows you to access the network management
capabilities that enable you to control the FOMIM and its attached
segments. For example, information on the number of good packets and
collisions that have passed through the FOMIM and each port on the
MIM can be gathered. For more information on managing the FOMIM,
refer to your specific management module Local Management Guide.
1.4 LANVIEW STATUS MONITORING SYSTEM
The FOMIM uses Cabletron Systems built-in visual diagnostic and status
monitoring system, LANVIEW. Using LANVIEW, network
troubleshooting personnel can quickly scan the LANVIEW LEDs to
observe network status, diagnose network problems, and determine which
node or segment is faulty (see Figure 1-2).