Instant EtherFast® Series
®
EtherFast 10/100
Workgroup Hubs
Use this guide to install :
EFAH05W v2
EFAH08W v2
EFAH16W v2
User Guide
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Instant EtherFast® Series
10/100 Workgroup Hubs
Table of Contents
Introduction
The EtherFast 10/100 Workgroup Hubs
Introduction
1
The EtherFast 10/100 Workgroup Hubs from Linksys are the fastest, most
economical way to build or expand your network! Ready to run right out of
the box, the 10/100 hubs let you connect computers or other nodes together in
seconds. The auto-sensing ports automatically adjust to either 10Mbps or
100Mbps speeds, allowing you to mix 10BaseT and 100BaseTX hardware
together any way you like! Combine low-cost 10Mbps computers with high-
speed Fast Ethernet workstations--save thousands of dollars by putting
100Mbps hardware only where you need it most!
The 10/100 Workgroup Hubs
About Fast Ethernet
1
2
Getting to Know the
10/100 Workgroup Hubs
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Package Contents
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Planning Your Network
4
Each hub includes a built-in shared uplink port that lets you plug into
10Mbps or 100Mbps hubs, switches, or backbones for easy expansion.
Advanced error handling, auto-partitioning, data-collision control, and auto-
polarity correction protect your data during transmissions. Compatible with
virtually all major operating systems including, Windows 95, 98, 2000, NT,
Millennium, and Novell NetWare, this professional-grade hub offers your
growing network the freedom to use both 10Mbps and 100Mbps speeds.
Connecting Nodes to the Hub
Uplinking the Hub
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5
5
Powering On the Hub
Appendix
6
Twisted-Pair Cabling
6
7
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9
Crimping Your Own Network Cable
Product Specifications
Contact/Warranty Information
With an amazing range of expansion possibilities and an impressive array of
advanced features, each 10/100 Workgroup Hub is one powerful and compact
device--all for an attractive price that’s hard to beat!
1
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Instant EtherFast® Series
10/100 Workgroup Hubs
About Fast Ethernet
Getting to Know the
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 technology will become more critical.
10/100 Workgroup Hubs
Package Contents
Standard Ethernet, which has been the most popular networking technology
to date with a maximum data throughput of 10 Megabits per second, is
becoming insufficient to handle the latest video, multimedia, and other speed-
intensive client/server LAN applications.
Among the solutions to the problem of network speed, Fast Ethernet has
emerged as the most viable and economical. Capable of sending and receiv-
ing data at 100 Megabits per second, it is more than fast enough to handle
even the most demanding video and other real-time applications.
• One EtherFast 10/100 Workgroup Hub (EFAH16W v2 shown)
• One AC Adapter
• User Guide and Registration Card
Although there are a number of different competing Fast Ethernet implemen-
tations, 100BaseTX is by far the most popular. Operating on two pairs of
UTP Category 5 unshielded twisted-pair cabling, 100BaseTX supports high
speed signaling and is relatively inexpensive. Because it uses four wires for
data transmission and the same packet format, packet length, error control,
and management information as 10BaseT.
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This backward compatibility is one of 100BaseTX's major advantages over
other forms of Fast Ethernet; it allows critical, speed-dependent network seg-
ments to be upgraded to 100BaseTX speeds as needed without re-wiring,
refitting, and retraining an entire site. Networks can now mix both slow and
fast network segments for different users or departments. Publishing, R&D,
video, multimedia, or accounting departments can enjoy a 100Mbps pace,
while other corporate segments can operate at slower and more affordable
10Mbps speeds.
(EFAH05W v2 shown)
PWR
The Power LED will illuminate when the the hub is receiv-
ing power.
100
(per port)
The 100 LED will illuminate if the port is operating at
100Mbps. The LED will be off if the port is running at
10Mbps.
Every port on your 10/100 Workgroup Hub is capable of running at either
10Mbps or 100Mbps, allowing you to mix and match economical 10BaseT
hardware with high performance 100Mbps network cards, hubs, switches, and
other equipment.
Link/Act
(per port)
The Link/Act LED will illuminate if the port has an
active network connection. The LED will flicker if the port
is receiving or sending data.
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Instant EtherFast® Series
10/100 Workgroup Hubs
Uplinking the Hub
Planning Your Network
The EtherFast 10/100 Workgroup Hub has a special switched uplink port with
it’s own distance extension capabilities. If you are mixing 10Mbps and
100Mbps hardware on your hub, it can be uplinked to other 100Mbps hubs at
a distance of 5 meters (16.4 feet).
Connecting Nodes to the Hub
Every 10/100 Workgroup Hub can be connected to either 10Mbps or
100Mbps PCs, workstations, file servers, print servers, or other hardware.
When powered up, each of the hub’s 10/100 ports will automatically adjust to
the proper speed, as determined by the speed of the hardware or node con-
nected to the port.
Connect each of your PCs, workstations, file servers, print servers, or other
network nodes to the Auto-Sensing Hub one by one. Each node should be
connected to the hub with a straight-through UTP Category 5 cable. Each
cable should be less than 100 meters (328 feet), in length. Ready-to-use net-
work cables of various lengths can be purchased at most computer stores. If
you wish to crimp your own cabling for custom sites or lengths, please refer
to the Crimping Your Own Network Cable section on page 7.
Powering On the Hub
The 10/100 Workgroup Hub comes with an AC power adapter. Plug the power
adapter’s plug into the hub’s power jack, then plug the other end of the electri-
cal cord into a standard AC electrical outlet. The hub will put itself through a
series of diagnostic tests (lasting just a few seconds), then begin scanning the
ports for live nodes. The installation is complete.
When connecting a PC to a hub, either the computer or the hub must be pow-
ered OFF. If both the computer and the hub are turned on while the connec-
tion is completed, the network will act erratically and you must reset the hub.
EFAH05W v2 & EFAH08W v2 only:
If the Uplink port is in use (connected to another hub, etc.), the 10/100
Workgroup Hub’s port next to the Uplink port must remain empty and
unused. As with most hubs, the 10/100 Workgroup Hub’s uplink port and the
port adjacent to it are joined together inside the hub, and one cannot be used
while the other is in use.
EFAH16W v2 only:
The 10/100 16-Port Hub is equipped with a crossover button (labeled
MDI/MDIX) that enables port 16 to be used as the hub’s uplink port. To uti-
lize the port’s uplink capability, the MDI/MDIX button must be depressed. If
the button is not depressed, port 16 will function as a normal 10/100 port.
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5
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Instant EtherFast® Series
10/100 Workgroup Hubs
Crimping Your Own Network Cables
Appendix
Twisted-Pair Cabling
There are different grades, or categories, of twisted-pair cabling. Category 5
is the most reliable and is highly recommended. Category 3 is a good second
choice. Straight-through cables are used for connecting computers to a hub.
Crossover cables are used for connecting a hub to another hub (there is an
exception: some hubs have a built-in uplink port that is crossed internally,
which allows you to link or connect hubs together with a straight-through
cable instead).
You can buy pre-made Category 5
cabling, or cut and crimp your own.
Category 5 cables can be purchased
or crimped as either straight-through
or crossover cables. A Category 5
cable has 8 thin, color-coded wires
inside that run from one end of the
cable to the other. All 8 wires are
used. In a straight-through cable,
wires 1, 2, 3, and 6 at one end of the
cable are also wires 1, 2, 3, and 6 at
the other end. In a crossover cable,
the order of the wires change from
one end to the other: wire 1 becomes
3, and 2 becomes 6. See the diagrams
on the next page for
more detailed informa-
tion on straight-through
and crossover cabling.
To determine which wire is wire number 1, hold the cable so that the end of
the plastic RJ-45 tip (the part that goes into a wall jack first) is facing away
from you. Face the clip down so that the copper side faces up (the springy
clip will now be parallel to the floor).When looking down on the copper side,
wire 1 will be on the far left.
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7
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Instant EtherFast® Series
10/100 Workgroup Hubs
Specifications
Customer Support
For help with the installation or operation of your EtherFast 10/100
Workgroup Hub, contact Linksys Customer Support at one of the phone num-
bers or Internet addresses below.
Model Numbers
EFAH05W v2 (5-Port)
EFAH08W v2 (8-Port)
EFAH16W v2 (16-Port)
IEEE 802.3 (10BaseT),
IEEE 802.3u (100BaseTX)
CSMA/CD
5, 8, or 16 10BaseT/100BaseTX RJ-45 Ports,
One Shared RJ-45 Uplink Port (5 & 8-Port model)
10Mbps (10BaseT)
Standards
Customer Support
(800) 326-7114
Protocol
Ports
(949) 261-1288
Information
Fax
(800) 546-5797
(949) 261-8868
Speed Per Port (Mbps)
E-mail
Web
FTP Site
ftp.linksys.com
100Mbps (100BaseTX)
Cabling Type
10BaseT
100BaseTX
Topology
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UTP Category 3 (or better)
UTP Category 5 (or better)
Star
Note: You must have your
proof of purchase and a bar-
code from the product’s
packaging on hand when
calling. Return requests can
not be processed without
proof of purchase.
Linksys Warranty Information
Power, 100Mbps*, Link/Activity* (*per port)
Linksys guarantees that every EtherFast 10/100
Workgroup Hub is free from physical defects in
material and workmanship under normal use for
FIVE years from the date of purchase. If the
Environmental
Dimensions
EFAH05W v2
EFAH08W v2
EFAH16W v2
Unit Weight
EFAH05W v2
EFAH08W v2
EFAH16W v2
Power
EFAH05W v2
EFAH08W v2
EFAH16W v2
Certifications
product proves defective during this warranty period, contact Linksys
Customer Support to obtain a Return Authorization Number. When returning
a product, mark the Return Authorization Number clearly on the outside of
the package and include your original proof of purchase. All customers out-
side of the United States of America and Canada shall be held responsible for
shipping and handling charges or any applicable duty.
4.3” x 3.4” x 1.3” (110mm x 87mm x 32mm)
6.3” x 4.3” x 1.4” (160mm x 110mm x 35mm)
7.25” x 6” x 2.5” (184mm x 152mm x 64mm)
6 oz. (0.17 Kg)
9 oz. (0.25 Kg)
16.9 oz. (0.48 Kg)
IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE
PAID FOR THE PRODUCT FROM DIRECT, INDIRECT, SPECIAL, INCI-
DENTAL, OR CONSEQUENTIAL DAMAGES RESULTING FROM THE
USE OF THE PRODUCT, ITS ACCOMPANYING SOFTWARE, OR ITS
DOCUMENTATION. LINKSYS OFFERS NO REFUNDS FOR ITS PROD-
UCTS.
7.5VDC, 700mA
3.3VDC, 3A
3.3VDC, 3A
FCC Class B,
CE Mark Commercial,
UL and CSA Listed
0ºC to 50ºC (32ºF to 122ºF)
-20ºC to 70ºC (-4ºF to 158ºF)
10% to 85% Non-Condensing
5% to 90% Non-Condensing
Operating Temp
Storage Temp
Operating Humidity
Storage Humidity
Tampering with or disassembling this product voids its warranty.
Linksys makes no warranty or representation, expressed, implied, or statutory,
with respect to its products or the contents or use of this documentation and
all accompanying software, and specifically disclaims its quality, perform-
ance, merchantability, or fitness for any particular purpose. Linksys reserves
the right to revise or update its products, software, or documentation without
obligation to notify any individual or entity.
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9
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