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Chapter 1

Introduction
How to use this guide; related guides; software conventions; getting help; 9H42x-xx firmware versions
Welcome to the Cabletron Systems MMAC-Plus Remote Management for the
9H42x-xx Series Fast Ethernet SmartSwitch™ Modules User’s Guide. We have
designed this guide to serve as a simple reference for using SPECTRUM Element
Manager for the 9H42x-xx family of Fast Ethernet SmartSwitch Modules for the
MMAC-Plus. These modules provide Fast Ethernet connectivity to the Internal
Network Bus (INB) backplane via high-speed packet switching, as well as RMON
management, Broadcast Storm Protection, and upcoming SecureFast Virtual
Networking features.
The information presented in this guide covers the following 9H42x-xx devices:
• The 9H421-12 module provides 12 fixed multi-mode fiber 100 Mbps interfaces,
each with SC connectors.
• The 9H422-12 module provides 11 fixed 10/100 RJ-45 connections for
category 5 twisted pair, and one media-flexible interface designed to accept a
Fast Ethernet Port Interface Module (FEPIM). Two Fast Ethernet port modules
are available: the FE-100FX, which provides a single multi-mode fiber port
with an SC connector; and the FE-100TX, with a single Category 5 UTP RJ45
connector.
• The 9H423-26 module provides 24 fixed 10/100 interfaces via two RJ71
connectors, and two fixed multi-mode fiber interfaces, each with SC
connectors. Support for this device is beta-quality only.
• The 9H423-28 module provides 28 ports of mixed 10/100 connectivity: 24
standard Ethernet (10Mbps) interfaces via two RJ71 connectors; two 10/100
interfaces via two fixed RJ45 connectors; one fixed multi-mode fiber Fast
Ethernet interface (with an SC connector); and one slot for an FEPIM module.
• And finally, the 9H429-12 module provides 12 fixed single-mode fiber Fast
Ethernet interfaces, also with SC connectors.