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LINKSYS Instant EtherFast Series EtherFast 10/100 Auto-Sensing Hubs User Guide / Data Sheet

Summary

The EtherFast 10/100 Auto-Sensing Hub series provides a cost-effective way for enterprises to build or expand flexible network infrastructure. These professional hubs automatically support both 10Mbps and 100Mbps connections, allowing seamless integration of various networking speeds. This manual is your complete guide to installing the hub—including rack mounting, connecting nodes, and utilizing advanced uplink features like long-distance fiber expansion. Ideal for IT professionals and growing businesses needing reliable, scalable connectivity solutions.

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Instant Ether Fast® Series

Ether Fast 10/100 Auto-Sensing Hubs

Use this guide to install these Linksys products:

Ether Fast 10/100 Ether Fast 10/100 5-Port Hub 16-Port Rack (EFAH05W) Mountable Hub (EFAH16)

Ether Fast 10/100

8-Port Hub Ether Fast 10/100 (EFAH08W) 24-Port Rack Mountable Hub

Ether Fast 10/100 (EFAH24) 16-Port Hub

(EFAH16W) User Guide

Page Summary Contents For LINKSYS Instant EtherFast Series EtherFast 10/100 Auto-Sensing Hubs User Guide / Data Sheet

Page 1 Instant Ether Fast® Series Ether Fast 10/100 Auto-Sensing Hubs Use this guide to install these Linksys products: Ether Fast 10/100 Ether Fast 10/100 5-Port Hub 16-Port Rack (EFAH05W) Mountable Hub (EF...
Page 2 COPYRIGHT & TRADEMARKS Copyright © 1998 Linksys, All Rights Reserved. Instant Ether Fast is a registered trade- mark of Linksys. Microsoft, Windows, and the Windows logo are registered trademarks ...
Page 3 Contents Introduction About Fast Ethernet Planning Your Network Installing the Hub LED Indicators Optional Fiber Optic Expansion Modules Mounting the Hub Connecting Nodes to the Hub Uplinking the Hub ...
Page 4 Introduction The Ether Fast 10/100 Auto-Sensing series of hubs from Linksys is the fastest, most economical way to build or expand an enterprise 100Mbps network! Ready to run right out of the box, eac...
Page 5 About Fast Ethernet As the demand for desktop video, multimedia development, imaging, and other speed-intensive applications continues to rise, the need for high per- formance, fault tolerant LAN tech...
Page 6 Planning Your Network The rules that govern how nodes and hubs are distributed across a network are important to ensure the integrity of your data. Cabling specifications, distance limits, and other t...
Page 7 Installing the Hub Carefully remove the hub from its packaging. Make sure that you received all of the items listed below. If any items are missing or damaged, contact your Linksys dealer for replacem...
Page 8 LED Indicators Power Indicates that the hub is receiving power. 100/10 Col Indicates if collisions are being encountered at 100Mbps and/or 10Mbps. Some collisions are normal. If your network seems to ...
Page 9 Optional Fiber Optic Expansion Module The Auto-Sensing 16 and 24-Port rack mountable hubs each come with a fiber optic expansion slot which accepts an optional 100Base FX fiber optic module for connec...
Page 10 Connecting the Auto-Sensing Hubs to Other Hubs, Switches, or Routers Like most hubs, the Auto-Sensing Hubs can be uplinked to 10Mbps or 100Mbps hubs, stackable hubs, switches, or routers. The front of...
Page 11 Uplinking the 5-Port Hub The Ether Fast 5-Port Auto-Sensing Hub has a special switched uplink port with it’s own distance extension capabilities. If you are mixing 10Mbps and 100Mbps hardware on your ...
Page 12 Powering On the Hub Desktop Model The hub comes with both a power adapter and in some instances, an AC electrical cord. Plug the power adapter’s plug into the hub’s power jack. Plug the provided AC el...
Page 13 Appendix Twisted Pair Cabling There are different grades, or categories, of twisted-pair cabling. Category 5 is the most reliable and widely compatible, and is required for Fast Ethernet. You can buy ...
Page 14 How To Install An Add-On Module Follow the following steps to install the add-on modules in the Ether Fast 10/100 Auto-Sensing Hub (EFAH16 or EFAH24). 1. Power off the hub and remove the AC power cord...
Page 15 Fiber Optic Modules Six different Fiber Optic modules are available for the rack mountable Auto-Sensing hubs (EFAH16 and EFAH24): FFOSC1: 100Base FX 1-Port Transceiver Module (SC) FFOSC2: 100Base FX 2...
Page 16 A maximum of 2 Transceivers can be connected together in one segment. When two hubs are connected via Transceivers together, the same rule of cascading two 100Mb hubs applies to them. To cascade anoth...
Page 17 The following illustration is an example of how to connect four Rack Mountable Ether Fast 10/100 Auto-Sensing hubs together using fiber optic cabling. Notice that the hubs at the top and the bottom ar...
Page 18 100Base TX Distance Extender Module This module has a special distance extending port that sends data at 100Mbps over regular 100Base TX Category 5 cabling. The distance exten- der module sends your d...
Page 19 The following illustration is an example of how to connect four Ether Fast 10/100 Auto-Sensing hubs together using the Single-Port 100Base TX Distance Extender Module. Note that, without the distance ...
Page 20 Specifications Models EFAH05W EFAH08W EFAH16W EFAH16 EFAH24 Standards IEEE 802.3 IEEE 802.3u Ports 5, 8, 16, or 24, depending on model; 16 and 24-Port models each also include two 100Base FX fiber opt...
Page 21 Customer Support For help with the installation or operation of your Ether Fast 10/100 Auto- Sensing Hub, contact Linksys Customer Support at one of the phone num- bers or Internet addresses below. Cu...
Page 22 http: /www.l inksys.com © Copyright 1999 Linksys, All Rights Reserved. Printed in the USA.

Manual Details

Brand EtherFast
Pages 22
File Size 124.10 KB
Published May 19, 2026
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Frequently Asked Questions

Are the ports compatible with mixed speeds?

Yes, auto-sensing ports automatically adjust to either 10Mbps or 100Mbps speeds, letting you mix 10BaseT and 100BaseTX hardware.

What is the maximum distance for uplinking multiple hubs?

Without a distance extender module, the limit is 5 meters; with the module installed, it can reach up to 100 meters (328 feet).

Which operating systems are supported by these hubs?

The hub is compatible with virtually all operating systems, including Windows 98, Windows 95, Windows NT, and Novell NetWare.

What is the limited warranty coverage period?

Linksys guarantees the EtherFast hubs against physical defects in material and workmanship for five (5) years from the date of purchase.