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Cabletron Systems MICROMMAC- User Manual

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1-1
 
CHAPTER  1
INTRODUCTION
 
Welcome to the Cabletron Systems 
 
MicroMMAC-22T/-24T/-42T/
-44T Stackable Token Ring Intelligent Hub User’s Guide
 
. This manual 
provides installation instructions, network requirements, reference 
information, and operating instructions for the MicroMMAC-T (Figure 
1-1) family of stackable hubs. Installing the MicroMMAC-T requires 
familiarity with the physical layer components of Token Ring (IEEE 
802.5) data communications networks. 
 
NOTE
 
: Unless otherwise specified, this manual uses the term 
MicroMMAC-T to collectively refer to the MicroMMAC-22T, the 
MicroMMAC-24T, the MicroMMAC-42T, and the MicroMMAC-44T.
 
.
 
Figure 1-1.  The MicroMMAC-T
 
1.1  CONTENTS OVERVIEW
 
This manual contains the following information:
Chapter 1, 
 
Introduction
 
, outlines the contents of this manual and 
describes features of the MicroMMAC-T and its add-on components. It 
also lists sources where more information on Token Ring network 
implementation can be found.
Chapter 2, 
 
Requirements/Specifications
 
, describes cabling requirements, 
network guidelines, and MicroMMAC-T operating specifications.
Chapter 3, 
 
Installation, 
 
contains MicroMMAC-T installation instructions 
and discusses network connections using various media types. This 
chapter includes instructions for setting the Ring Speed Switch, the Reset 
Switch, the NVRAM Switch, and the TPIM Phantom Switch. It also 
RO
TOKEN RING HUB 
WITH
 LANVIEW®
 
SUPPORTING 100 OHM UTP CABLE
 MicroMMAC-24T
RESET
CPU
ACT
MGMT
16 Mb/s
COM 1
COM 2
DISPLAY
SPEED
16M
4M
TPIM
6         5         4          3          2         1
18        17        16        15        14       13
24        23        22        21       20       19 
12       11        10         9          8         7  
RI
LCD
TPIM
Slot
Ring Out