INTRODUCTION
1-2
your concentrator module. Detailed specifications for each of the
concentrator modules is also provided.
Chapter 3,
Installing the Concentrator Module
, contains
instructions for installing a concentrator module into the MMAC,
and attaching token ring station cabling.
Chapter 4,
Testing and Troubleshooting
, describes checks that you
can perform if you encounter problems after installing a
concentrator module. Instructions for using LANVIEW®,
Cabletron Systems built-in visual diagnostic and status monitoring
system, are also included.
1.2
THE TRFMIM CONCENTRATOR MODULES
The TRFMIM-22, TRFMIM-26, and TRFMIM-28, shown in
Figure 1-1, can be installed as a free-standing token ring network or
to provide fiber optic connectivity to an existing token ring
network. The concentrator modules are designed for installation
into a Cabletron Systems MMAC. Since they do not have externally
accessible Ring-In and Ring-Out ports, they are considered
concentrator modules. (A concentrator in token ring applications is
defined as a device with multiple TCU ports bound by externally
accessible Ring-In and Ring-Out ports.)
All concentrator modules are designed for installation into a
Cabletron Systems MMAC, where they can be used to create an
independent 6, 12, or 18 port ring or to expand an existing token
ring network. When any concentrator module is used within an
MMAC, the concentrator module is connected via the Flexible
Network Bus (FNB) to other token ring MIMs, repeaters, or bridges.
