KINGSTON TECHNOLOGY
F
AST ETHERX STACKABLE
8-PORT, 12-PORT, & 24-PORT
100B
F
U
MODELS: KNE8TX/RS
ASE-TX 19” RACK-MOUNTABLE
AST ETHERNET HUBS
SER’S GUIDE
KNE12TX/RS
KNE24TX/RS
Kingston Technology’s
Fast EtheRx Stackable
8-Port, 12-Port, and 24-Port
100BASE-TX 19” Rack-Mountable
Fast Ethernet Hubs
User’s Guide
Part No. 4460051-001.A01
Kingston Technology Company
17600 Newhope
Fountain Valley, CA 92708
(714) 435-2600
Important Safety Instructions
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
1. Read all these instructions.
2. Save these instructions for later use.
3. Follow all warnings and instructions marked on the product.
4. Do not use this product near water.
5. This product should be operated from the type of power
source indicated on the marking label. If you are not sure of
the type of power available, consult your dealer or local
power company.
6. Do not attempt to service this product yourself, as opening
or removing covers may expose you to dangerous voltage
points or other risk. Refer all servicing to service personnel.
Wichtige Sicherheitshinweise
1. Diese Hinweise sollten vollständig durchgelesen werden.
2. Diese Hinweise für einen späteren Gebrauch aufbewahren.
3. Allen auf dem Gerät angebrachten Warnungen und
Hinweisen folgen.
4. Das Gerät nicht in der Nähe von Wasser verwenden.
5. Das Gerät nur mit dem Aufkleber bezeichneten
Netzspannung betreiben. Bei Fragen über die Art der
Netzspannung sollte der Händler oder das
Energieversorgungsunternehmen zu rate gezogen werden.
6. Nicht versuchen das Produkt selbst zu reparieren. In allen
Produkten existieren gefährliche elektrische
Spannugen. Nicht das Gehäuse öffnen.
Kingston Technology Company KNE24TX/RS User’s Guide - Rev.
A01
i
TABLE OF CONTENTS
Introduction............................................................................ 2
Order Information .....................................................2
Model Types ............................................................. 3
Special Features....................................................... 4
Package Contents .................................................... 4
Design Features .................................................................... 5
Repeater Functions .................................................. 5
Jabber Lock-up Protection .......................................5
Collision-Handling..................................................... 5
Error-Handling .......................................................... 5
Automatic Partitioning/Reconnection .......................6
Hardware Installation............................................................. 6
Front Panel ............................................................... 6
Power LED ..................................................6
Collision LED ............................................... 6
Fiber Module Detection LED ....................... 6
UTP Port LEDs ............................................ 7
Utilization LEDs ...........................................7
UTP and Uplink Ports.................................. 7
Using a Crossover Cable ............................8
Notes on MDI and MDI-X Ports...................8
Rear Panel................................................................ 9
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
ii
Power Switch .............................................. 9
AC Power Connector .................................. 9
Fan Units..................................................... 9
100FX Fiber Module (Optional)................... 9
Stacking Fast EtheRx Hubs ...................... 10
Installing the 100FX Module (Optional) .... 11
Appendices ......................................................................... 12
Appendix A Pin Assignments.............................. 13
UTP Port Pin Assignments ....................... 13
Appendix B Cabling Guidelines .......................... 14
Cable Wiring Standards ............................ 15
UTP Cable Rating Codes.......................... 16
Appendix C Specifications .................................. 18
Appendix D Commonly Asked Questions........... 21
Appendix E Mounting Templates ........................ 23
Rubber Feet for Desktops......................... 23
Brackets for Rack Mounting...................... 23
Appendix F Product Warranties and Notices...... 24
Limited Warranty Statement ..................... 24
Duration of Warranty................................. 24
Free Technical Support............................. 25
Disclaimers................................................ 25
Certifications ............................................. 26
Introduction
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
2 Introduction
Intended Audience: This manual assumes that the user has a general working
knowledge of networking principles and its architecture.
Congratulations on the purchase of your Kingston Fast EtheRx Stackable
100BASE-TX 19” Rack-Mountable Fast Ethernet Hub. There are three models
available: KNE8TX/RS, KNE12TX/RS, and KNE24TX/RS, 8-Port, 12-Port,
and 24-Port Fast Ethernet hubs, respectively. The Fast EtheRx models are
100BASE-TX Class
IEEE 802.3u 100Mb/s CSMA/CD (Carrier Sense Multiple Access with
Collision Detection) networks using Category 5 Unshielded Twisted Pair
(UTP) cabling. There is also an optional 100BASE-FX plug-in module
available for either SC or ST-type connectors. The Fast EtheRx 100BASE-TX
hubs operate at 100Megabits per second (Mbp/s) out-performing standard
10BASE-T Ethernet 10Mb/s operation by up to 10 times faster.
I
and Class II compliant repeaters which conform to
The Fast EtheRx hubs offer eight (8), twelve (12), or twenty-four (24) UTP
ports for 100BASE-TX Fast Ethernet connections. The last UTP port offers
two RJ-45 connectors to support both crossover or straight-through cable wiring
for uplinking to one other 100BASE-TX Class
hubs can also be stacked (using any combination of these 3 models) up to six
hubs using the stacking cable provided. This allows a maximum of 48, 72, or
144 UTP ports (depending on the model) on a single collision domain. The
Fast EtheRx hubs can be used on desktop or 19-inch rack-mount installations
(mounting hardware included). For easy trouble-shooting, the front panel
includes a variety of diagnostic LEDs including: Power, Collision, Utilization
and UTP port LEDs which display Link, Activity and Partition/Error status.
II
repeater. The Fast EtheRx
For the remainder of this manual, the Fast EtheRx Stackable Fast Ethernet
Hubs will be referred to collectively as the Fast EtheRx Hubs. For clarity, the
three models will be differentiated as follows:
KNE8TX/RS – Fast EtheRx Stackable 8-Port Fast Ethernet hub
KNE12TX/RS – Fast EtheRx Stackable 12-Port Fast Ethernet hub
KNE24TX/RS – Fast EtheRx Stackable 24-Port Fast Ethernet hub
Order Information
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Introduction 3
The Fast EtheRx hubs support optional Fiber Optic plug-in modules which can
be ordered for future upgrading by the following part numbers:
Accessories
Part No. Description
KNE100FX/RSC Optional 100BASE-FX Fiber Optic Plug-In Module
KNE100FX/RST Optional 100BASE-FX Fiber Optic Plug-In Module
with SC (Subscriber Connect) connectors
with ST (Straight Tip) connectors
Model Types
100BaseTX Class Repeater
100BaseTX Fast Ethernet Stackable Hub
100BaseTX Fast Ethernet Stackable Hub
KNE12TX/RS
KNE8TX/RS
PWR COL FX/ON
PWR COL FX/ON
Link / Act
1 2 3 4 5 6 7 8
FX
Link / Act
1 2 3 4 5 6 7 8 9 10 11 12
Error / Partition
FX
Utilization %
1 12 25 50 100
Error / Partition
Fast EtheRx KNE8TX/RS
8-Port Model
Utilization %
1 12 25 50 100
Fast EtheRx KNE12TX/RS
12-Port Model
II
7
653421
8
8 x
MDI-X MDI
100BaseTX Class Repeater
II
1211
109 11
10978653421
12 x
12 x
MDI-X MDI
Stackable 100BASE-TX
Fast Ethernet Hub
PWR
KNE24TX/RS
1234
UTIL%
502512160
Link / Act / Partition
FX
1234
5678
COLL
9101112
FX/ON
13 14 15 16
17 18 19 20
21 22 23 24
13 14 15 16 21 22 23 24
56 78 9101112
17 18 19 20
100BASE-TX
Class II Repeater
24
Fast EtheRx KNE24TX/RS
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
4 Introduction
Special Features
• 100BASE-TX Class I or Class II compliant repeater
• Stack up to six Fast EtheRx hubs to create a single repeater unit
• 8, 12, or 24 UTP ports for 100BASE-TX connection
• 8, 12, or 24 Link, Activity, and Partition/Error Status LEDs for easy
troubleshooting
• Optional 100BASE-FX modules available (SC or ST connectors)
• Utilization LEDs display network traffic in five LED percentage levels
• Power LED and Collision LED for collision detection
• Automatic partition and reconnection
• Uplink Ports support both crossover and straight-through cable wiring for
cascading to another 100BASE-TX Class
• Conforms to IEEE 802.3u 100BASE-TX standard and Repeater for
100Mb/s baseband networks
• Internal auto-sensing universal power supply operating at 100-240VAC
(50/60Hz)
• 19-inch Rack Mountable with mounting kit included
II
repeater
Package Contents
Your Fast EtheRx Stackable package should contain the following items:
ο Fast EtheRx Stackable 8-, 12-, or 24-Port Fast Ethernet Hub
KNE8TX/RS or KNE12TX/RS or KNE24TX/RS
ο 50-pin shielded stacking cable
ο AC power cord
ο Mounting kit includes:
(2) Angle brackets
(8) Bracket mounting screws
(4) 10/32” Rack-Mount screws
(4) Rubber Feet
ο User's Guide
If any of the items are missing or damaged, please contact your Kingston
dealer for a replacement. Be sure the items you receive are genuine Kingston
Technology products. If
of your unit, it’s not a genuine Kingston product.
the Kingston name and logo are not on the front panel
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Design Features 5
Design Features
The Fast EtheRx 100BASE-TX hubs comply with the full set of repeater
functions as defined by IEEE 802.3u, clause 27. These functions include all
Repeater Functions, Signal Regeneration, Jabber Lockup Protection, CollisionHandling, Error-Handling, and Auto Partitioning/Reconnection. These
functions are usually transparent to all network activities and are summarized
below.
Repeater Functions
If any single port senses the start of a valid packet on its receiving line, the Fast
EtheRx hub will re-transmit the received data to all other ports on the network.
The retransmission of packets complies with the IEEE 802.3u specification in
terms of preamble structure, voltage amplitude, and timing characteristics.
These timing regeneration’s prevent cumulative signal loss, jitter, and
distortion caused by the network cabling, and allow the Fast EtheRx Hubs to be
uplinked to another 100BASE-TX switching hub or cascaded to other Class
Repeater.
Jabber Lock-up Protection
The Fast EtheRx hubs implement a built-in jabber protection scheme to ensure
that the network is not disabled due to transmission of excessively long data
packets. This protection scheme will automatically interrupt the reception of
abnormally long streams of data to prevent jabber lock-up.
II
Collision-Handling
The Fast EtheRx hubs will perform collision detection and respond to collision
conditions as defined in the IEEE 802.3u specifications.
Error-Handling
With 100BASE-TX Fast Ethernet, the new error-handling feature prevents substandard links from generating streams of false carrier and interfering with
other links.
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
6 Hardware Installation
Automatic Partitioning / Reconnection
If any of the ports on the Fast EtheRx Hub experience excessive numbers of consecutive
collisions, duration collisions, or faulty conditions, that particular port can be partitioned.
Once partitioned, the hub will continue to monitor that port. If the error conditions have
been corrected or a good data packet is transmitted without incurring a collision, the hub
will automatically reconnect that port to the network.
Hardware Installation
Before you begin installing network cables, please take a few moments to familiarize
yourself with the front panel of your Fast EtheRx Hub. The functions on the front and
rear panels are illustrated below.
Front Panel
Fiber Module Detection LED Utilization LEDs
Link / Act / Partition
FX
1234
5678
9101112
FX/ON
13 14 15 16
17 18 19 20
21 22 23 24
Link / Activity / Partition LEDs
UTIL%
502512160
Power LED
Collision LED
Stackable 100BASE-TX
Fast Ethernet Hub
PWR
KNE24TX/RS
COLL
1234
13 14 15 16 21 22 23 24
100BASE-TX UTP Ports
5678 9101112
17 18 19 20
100BASE-TX
Class II Repeater
24
Uplink Ports
Fig. 1. Front Panel - 24-Port Model
Power LED
The green LED indicates the power status. The LED will light when the AC power cord
is connected from a power source to the hub and the power switch is turned on.
Collision LED
The amber LED displays the collision status. If a collision is detected on the network, the
amber LED will flash. For the Fast Ethernet CSMA/CD network, collisions can be quite
common. A collision occurs when two or more stations try to transmit data
simultaneously. Both stations will stop transmitting and then re-transmit after a random
period of time.
Fiber Module Detection LED
The Fiber Module Detection LED will light up if the optional 100FX module is installed.
This LED will not light up if the optional 100FX module is not installed.
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Hardware Installation 7
UTP Port LEDs
The UTP Port LEDs indicate Link, Activity, Error, and Partition status. If a
good link is established on any given port, the green LED will be continuously
lit, indicating a valid network connection between the network node and the
hub. When data is received, the LED will flash green. If the port is partitioned
or encounters an error, such as jabber, false carrier, misalignment, or invalid
packet, the LED will flash amber.
If an LED does not indicate a good link, check the following:
1. Make sure the power is turned on for both the PC and Fast EtheRx
Hub. The power LED should be lit.
2. Verify the network drivers have been loaded on the PC. Some adapters require
the drivers to be loaded to establish a proper link.
3. Make sure the cable is wired properly and connected on both ends.
4. If steps 1, 2, and 3 are correct, the cable may be defective or not wired
correctly. Replace the cable and try again. Please refer to Appendix A
for pin assignments and Appendix B for cabling guidelines.
Utilization LEDs
There are five utilization LEDs to display the amount of network traffic in five
percentage levels. The amount of data traffic is measured in frames per second
(FPS), then calculated into the following percentage forms: 1%, 12%, 25%,
50%, and 100%. The appropriate LED will light based on the network activity.
UTP and Uplink Ports
The UTP ports on the front panel, numbered 1 through 8 (KNE8TX/RS), 1
through 12 (KNE12TX/RS), or 1 through 24 (KNE24TX/RS), support
100BASE-TX connections. Since the crossover function is implemented on all
UTP MDI-X ports, a straight-through cable should be used to connect to a
workstation. The last UTP port on each model has two (2) RJ-45 connectors
for support of cabling in the crossover and straight-through configuration.
Only one of the two ports, MDI-X or MDI (
or
), may be used.
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
8 Hardware Installation
Use the MDI-X port
when connecting to
a network card or
8 8
8
other MDI device.
8
Use the MDI port
when connecting to
a hub or other MDI-X
device.
Using a Straight-Through Cable
Using a Crossover Cable
Use the MDI port
when connecting to
a network card or
other MDI device.
8 88 8
Use the MDI-X port
when connecting to
a hub or other MDI-X
device.
Notes on MDI and MDI-X Ports
MDI (Media Dependent Interface) is the standard that defines the mechanical
and electrical configuration of a UTP port. For any two devices to
communicate with each other on the network, the transmitter of one device
must be connected to the receiver of the other device. This can be achieved by
using a crossover cable, or by using the MDI-X port, which implements the
crossover internally.
Ports 1 thru 7 (KNE8TX/RS), ports 1 thru 11 (KNE12TX/RS), and ports 1 thru
23 (KNE24TX/RS), like all normal hub ports, are configured as MDI-X. The
last UTP port has two (2) RJ-45 connectors in order to support both MDI and
MDI-X configurations for flexibility when uplinking to another Class
repeater using either cable type. All NICs (Network Interface Cards) and
Router ports are usually by default configured as MDI. A simple illustration
shows the relationship of cable types to port types:
II
Port
Connector
Port
Config
MDI-X Use Crossover cable Use Straight-through cable
MDI Use Straight-through cable Use Crossover cable
For Connection to
Another Hub Port (MDI-X)
For Connection to a Network
Adapter or Router (MDI)
Table 1. Port Configurations
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Hardware Installation 9
100-240VAC / 50-60Hz 2.0A Max
PWR
OUT
IN
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
PWR
OUT
IN
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
PWR
OUT
IN
Stackable Module100FX Fiber Module
Rear Panel
100BASE-FX Fiber Optic
Plug-in Module
(optional)
Dual Fan Units
Stacking Ports
AC Powe r
Connector
Power
Switch
Fig. 2. Hub Rear Panels with Stacking Cables
Power Switch
The power switch toggles power on and off to the unit. The switch can also be
used to reset the Fast EtheRx hub.
AC Power Connector
The Fast EtheRx hubs use an auto-sensing 100VAC-240VAC, 50/60Hz
internal power supply. Connect the AC power cord from the rear of the unit to
an AC electrical outlet.
WARNING: For safety reasons, DO NOT attempt to open and
service the unit. There are no user-serviceable components
inside.
Fan Units
The Fast EtheRx hubs use two independent cooling fans for optimum air flow
to safeguard the unit from unnecessary heat exposure.
100FX Fiber Module (Optional)
Kingston offers an optional plug-in module to support 100BASE-FX Fiber
Optic cabling. There are two models to support both Straight-Tip (ST) and
Subscriber Connect (SC) type connectors:
• KNE100TX/RST for ST connectors
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
10 Hardware Installation
100-240VAC / 50-6
OUT
IN
Stackable Module
100-240VAC / 50-6
OUT
IN
Stackable Module
100-240VAC / 50-6
OUT
IN
Stackable Module
• KNE100TX/RSC for SC connectors.
Stacking Fast EtheRx Hubs
The Fast EtheRx hubs use stacking ports located on the rear panel to stack up
to six hubs in any combination of 8-Port, 12-Port, or 24-Port models. Follow
the directions below to stack up to six hubs together:
1. Locate the 50-pin shielded stacking cable included with your
package contents.
2. Plug one end of the cable into the port labeled, “Out” on the first
hub.
3. Plug the other end of the cable into the “In” port on the second hub.
4. Connect the AC power cord to each hub, then flip the power switch
to turn on power to the unit.
5. Repeat the process to stack additional hubs up to a maximum of six
(6) hubs.
Figure 3 below illustrates the configuration for stacking six of the 12-port
model hubs, expanding the total number of UTP port connections from 12 to
72 UTP ports, while still being recognized as one single repeater unit on the
network. A maximum of six (6) Fast EtheRx hubs can be stacked in any
combination of 8-, 12-, and 24-port models.
OUT
IN
PWR
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
OUT
IN
PWR
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
OUT
IN
PWR
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
OUT
IN
PWR
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
OUT
IN
PWR
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
OUT
IN
PWR
Stackable Module100FX Fiber Module
100-240VAC / 50-60Hz 2.0A Max
Stack
up to
6 hubs
maximum
Fig. 3. Stacking Additional Hubs
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Hardware Installation 11
100FX Fiber Module
100FX Fiber Module
TX
RX
Installing the 100FX Module (Optional)
Kingston offers two optional plug-in modules to support 100BASE-FX Fiber
Optic cabling with either SC (Subscriber Connector) or ST (Straight Tip)
connector types. Model KNE100FX/RSC supports SC-type connectors. Model
KNE100FX/RST supports ST-type connectors.
To upgrade your Fast EtheRx Stackable Fast Ethernet hub with either of the
100BASE-FX plug-in modules, follow the directions below. The procedure
requires a Philips head screwdriver.
1. Locate the faceplate labeled “100FX Fiber Module” on the rear
panel of the hub.
2. Remove the four philips head screws to remove the faceplate.
3. Next, insert the plug-in module into the open slot. Press firmly to
secure the module into the socket connector.
4. Re-install the four screws to secure the faceplate to the hub.
5. The FX/ON LED will display a solid light if properly installed.
Figure 4 below illustrates the KNE100FX/RSC with SC-type connectors
installed into the rear panel of your EtheRx hub. Figure 5 shows the
KNE100FX/RST with ST-type connectors installed.
RX
TX
Fig. 4. Model KNE100FX/RSC Fig. 5. Model KNE100FX/RST
with SC connectors with ST connectors
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
12
Appendices
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Appendix A Pin Assignments 13
Appendix A Pin Assignments
UTP Port Pin Assignments
The UTP ports use RJ-45 Unshielded Twisted Pair (UTP) cabling. Connector
pin numbers and pin wiring assignments are listed below in Figure A-1.
Twisted-Pair cables can be wired with either straight-through or crossover pin
assignments. Both wiring schemes are mentioned in "Appendix B Cabling
Guidelines" for reference in creating a twisted-pair cable.
1234
Stackable 100BASE-TX
Fast Ethernet Hub
PWR
KNE24TX/RS
FX
1234
COLL
FX/ON
13 14 15 16
Link / Act / Partition
5678
17 18 19 20
UTIL%
502512160
9101112
21 22 23 24
13 14 15 16 21 22 23 24
The UTP port labeled 24= is a standard straight-through UTP port.
All other UTP ports are configured as MDI-X, or internally crossed.
By default, all repeating and switched UTP ports are generally
configured as MDI-X, unless otherwise specified. See Notes on MDI
and MDI-X for more details.
Fig. A-1 RJ-45 Connector Pin Numbers
Pin Number MDI-X MDI
1 Receive Data + Transmit Data +
2 Receive Data - Transmit Data -
3 Transmit Data + Receive Data +
4,5 Not Used Not Used
6 Transmit Data - Receive Data -
7,8 Not Used Not Used
56 78 9101112
17 18 19 20
100BASE-TX
Class II Repeater
24
1 2 3 4 5 6 7 8
Modular
Connector
Table A-1 UTP Pin Assignments
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
14 Appendix B Cabling Guidelines
Appendix B Cabling Guidelines
Cable Type
When connecting network cables, the following table shows appropriate
cabling guidelines for 100BASE-TX Fast Ethernet architecture.
Ethernet Standard: 100BASE-TX
Trunk and Patch Cable
Type:
Max. Cable Length:
Hub to Workstation
Hub to Hub
Modular Plug:
Patch Panel:
Network Topology:
4-Pair 100Ω UTP CAT 5
(only 2 pairs used)
100M (328ft)
5M (16.4ft)
8-Pin RJ-45 CAT 5 only
8-Pin RJ-45 CAT 5 only
Star
Table B-1. Network Cable Guidelines
UTP Cable Wiring
100BASE-TX unshielded twisted-pair cables can be wired as "StraightThrough" or, in some cases, "Cross-Over" depending on the application. For
workstations connected to a hub, use "Straight-Through' wiring illustrated
below in Table B-2. In some instances (e.g. cascading from one hub to
another), you may use "Cross-Over" wiring illustrated below in Table B-3.
"Straight-Through" Crossover”
Cable Wiring Cable Wiring
Pin Number Pin Number
1 (TRX +)
2 (TRX -)
3 (RCV +)
6 (RCV -)
4, 5, 7, 8
1 (TRX +)
2 (TRX -)
3 (RCV +)
6 (RCV -)
Not Used
Table B-2. Straight-Through Wiring Table B-3. Cross Over Wiring
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Pin Number Pin Number
1 (TRX +)
2 (TRX -)
3 (RCV +)
6 (RCV -)
4, 5, 7, 8
3 (RCV +)
6 (RCV -)
1 (TRX +)
2 (TRX -)
Not Used
Appendix B Cabling Guidelines 15
Cable Wiring Standards
There are two governmental agencies: the Electronic Industry Association
(EIA) and the Telecommunications Industry Association (TIA), which set the
standard for all cable wiring requirements for commercial buildings.
With the advent of 100Mb/s networking products, it is best to use higher
quality CAT 5 cables like Belden or Helix as well as CAT 5-compliant patch
panels, patch cables, and connectors while following the EIA/TIA wiring
standards. 100 Ω UTP CAT 5 type cables use 4-pair UTP wiring.
Refer to the illustrations below for 4-pair 100Mb/s wiring using either T568A
(Fig. B-1) or T568B (Fig. B-2) wiring standards. Both T568A and T568B
wiring is compatible with 10BASE-T and 100BASE-TX and require no special
configurations, but stick to one wiring standard. If your building is wired for
T568A, any changes or additions must be done with the T568A wiring scheme.
Mixing the T568A and T568B wiring schemes will not work.
Pair 2
Pair 3
Pair 1
Pair 3
1 2 3 4 5 6 7 8
Fig. B-1. 4-Pair T568A Wiring
T568A Pairs Strand Solid T568B Pairs Strand Solid
Pin 1 Pair 3 Blue White/Green Pin 1 Pair 2 Black White/Orange
Pin 2 Pair 3 Orange Green/White Pin 2 Pair 2 Yellow Orange/White
Pin 3 Pair 2 Black White/Orange Pin 3 Pair 3 Blue White/Green
Pin 4 Pair 1 Red Blue/White Pin 4 Pair 1 Red Blue/White
Pin 5 Pair 1 Green White/Blue Pin 5 Pair 1 Green W hite/Blue
Pin 6 Pair 2 Yellow Orange/White Pin 6 Pair 3 Orange Green/White
Pin 7 Pair 4 Brown White/Brown Pin 7 Pair 4 Brown White/Brown
Pin 8 Pair 4 White Brown/White Pin 8 Pair 4 White Brown/White
T568A
Pair 4
Fig. B-2. 4-Pair T568B Wiring
Pair 1
Pair 2
1 2 3 4 5 6 7 8
T568B
Pair 4
Table. B-4. 4-Pair T568A Wiring Table B-5. 4-Pair T568B Wiring
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
16 Appendix B Cabling Guidelines
UTP Cable Rating Codes
UTP cables meet different UL-NEC requirements based mostly on cable-jacket
quality. Below is an explanation of the rating codes for each cable type.
UL – The National Electrical Code (NEC), published by the National Fire
Protection Association (NFPA), details advisory safety considerations for
electrical wiring. NEC Article 800 Communications Cables are manufactured
to meet these different cable types.
1. CMP – Cables meeting type CMP requirements are suitable for
installation in ducts and plenums without the use of conduit. These cables
are designed for fire resistance and low-smoke and toxin producing
characteristics.
2. CMR – Riser type cables are engineered to prevent the spread of fire from
floor to floor and are suitable for vertical shaft applications.
3. CM – Cables for general building wiring. CM cables are used in areas
other than plenums and risers. These cables are resistant to the spread of
fire and pass the UL 1581Vertical Tray Flame Test.
4. MP, MPR & MPP – Within Article 800, the Multi-purpose Cables
Category, allows conditional substitutions between different cable types &
are restricted by number, AWG size and stranding of the cable
conductors.
Terms You Should Be Familiar With
1. BACKBONE WIRING – The physical/electrical interconnections
between telecommunications wiring closets and equipment rooms.
2. COMPLIANCE – A datacomm or wiring device that meets all
characteristics of a standard is said to be in compliance with that standard.
3. PREMISE WIRING – The entire wiring system on the premises,
especially the supporting wiring that connects the communications outlets
to the network interface jack.
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Appendix B Cabling Guidelines 17
4. NEAR-END CROSSTALK (NEXT) – In wires packed together within a
cable, the signals generated at one end of the link can flush out the weaker
signals coming back from the receiving end of the link.
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
18 Appendix C Specifications
Appendix C Specifications
Fast EtheRx Models: KNE8TX/RS, KNE12TX/RS
Compliance: IEEE 802.3u 100BASE-TX Standard for 100Mb/s
Media Interface:
KNE8TX/RS
KNE12TX/RS
Diagnostic LEDs: 8 or 12 LEDs for Link (Green) & Activity (flashing
Connector Type: RJ-45, Female
Cable Grade: Category 5 or better
Cable Type: UTP 26 to 22 AWG
Stacking Cable: 50-pin shielded cable
Additional Stacking: Up to 6 hubs maximum
Max. segment length: 100m (328 ft)
Environmental:
Operating Temp. 0°C to 45°C (32°F to 113°F)
Storage Temp. -20°C to 60°C (-4°F to 140°F)
Relative Humidity 10% to 90% non-condensing
Electrical:
Input Voltage: 100-240VAC, 50/60Hz Auto-sense, internal power
Output Voltage: 5VDC / 8A
Power Consumption:
KNE8TX/RS
KNE12TX/RS
Physical:
Dimension
(H x L x D):
Weight:
KNE8TX/RS
KNE12TX/RS
Certification
EMI Standards: FCC Class A, CE CISPR A
EMC Standards: EN55022, IEC801-2, IEC801-3, IEC801-4
Low Voltage Directive: EN60950
Safety Standards: UL, CSA, TUV
Optional Accessories:
baseband networks
8 UTP ports for 100BASE-TX connections
12 UTP ports for 100BASE-TX connections
green)
8 or 12 LEDs for Partition (flashing Amber)
1 LED for Collision status (Amber)
1 LED for Power Indicator (Green)
5 LEDs Utilization Status (steady green)
1 LED for Fiber Module Detection (optional)
supply
15 Watts maximum
21 Watts maximum
1.70” x 17.32” x 10”
(43.2mm x 440mm x 254mm)
8.10 lbs (3.69 kg)
8.18 lbs (3.71 kg)
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Appendix C Specifications 19
100FX Modules:
with SC connectors
with ST connectors
Part Numbers:
KNE100FX/RSC
KNE100FX/RST
Specifications
Fast EtheRx Model: KNE24TX/RS
Compliance: IEEE 802.3u 100BASE-TX Standard for 100Mb/s
Media Interface: 24 UTP ports for 100BASE-TX connections
Diagnostic LEDs: 24 LEDs for Link (Green), Activity (flashing Green),
Uplink Port: Port 24 supports crossover and straight-thru cable
Connector Type: RJ-45, Female
Cable Type: UTP 26 to 22 AWG
Cable Grade: Category 5 or better
Stacking Cable: 50-pin shielded cable
Additional stacking: Up to 6 hubs maximum
Max. segment length: 100m (328 ft)
Inter-repeater link:
No. of repeaters:
Cable Length:
Environmental:
Operating Temp. 0°C to 45°C (32°F to 113°F)
Storage Temp. -20°C to 60°C (-4°F to 140°F)
Relative Humidity 10% to 90% non-condensing
Electrical:
Input Voltage: 100VAC - 240VAC, 50/60Hz
Output Voltage: 5VDC / 8A
Power Consumption: 27W maximum
Physical:
Dimension
(H x L x D):
Weight: 9.25 lbs. (4.2 kg)
Certification:
EMI Standards: FCC Class A, CE CISPR A, C-Tick
EMC Standards: EN55022, IEC801-2, IEC801-3, IEC801-4
Low Volt Directive: EN60950
Safety Standards: UL, cUL, TUV
Optional Accessories:
baseband networks
and
Partition (flashing Amber)
1 LED for Collision status (Amber)
1 LED for Power Indicator (Green)
5 LEDs for Utilization Status (steady green)
1 LED for Fiber Module Detection (steady green)
Two (2) Class II repeaters maximum
5 meters (16.4 feet)
Auto-sensing, internal power supply
1.70” x 17.32” x 10”
(43.2mm x 440mm x 254mm)
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
20 Appendix C Specifications
100FX Modules:
with SC connectors
with ST connectors
Part Numbers:
KNE100FX/RSC
KNE100FX/RST
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Appendix D Commonly Asked Questions 21
Appendix D Commonly Asked Questions
Class I vs. Class II 100BASE-TX Fast Ethernet
Repeaters
There are currently two classes of Fast Ethernet repeaters, defined as Class I and
Class
.
II
Class I: in a maximum length segment topology, only one Class
repeater may exist between any two nodes within a single
I
collision domain.
Class
repeaters may exist between any two nodes within a single collision
domain.
: in a maximum length segment topology, two Class II
II
Will 100BASE-TX run on Category 3 cable?
No! Category 3 (CAT 3) cabling even in short lengths generates too much near
end crosstalk for 100BASE-TX networks. The IEEE 802.3u 100BASE-TX Fast
Ethernet standard requires Category 5 100 Ω UTP or 150 Ω STP which
complies with ISO/IEC 11801:1995.
What is Category 5?
Category 5 (CAT 5) is a further extension of the EIA/TIA-568 cabling system
to 100 MHz. Category 5 components (i.e., UTP trunk and patch cables,
modular plug, and patch panel, etc.) are defined by EIA/TIA-568, but with the
characterizations extended to 100 MHz by TSB-36 and TSB-40. The cable
grades are categorized as follows:
• Category 3: up to 16 MHz
• Category 4: up to 20 MHz.
• Category 5: up to 100 MHz.
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
22 Appendix D Commonly Asked Questions
Category 5 Compliance vs. Category 5 Performance?
Having CAT 5 components in your network installation does not necessarily
achieve full Category 5 performance. To achieve any category-rated
performance, make sure all cabling components are at least of the minimum
category required.
To achieve full CAT 5 performance, all components must be CAT 5 compliant
and terminated properly according to EIA/TIA-568 TSB-36 and TSB-40
guidelines.
What are the Guidelines for Proper Termination?
It is important to maintain the twists of the cable as close to the termination on
the outlet as possible, to avoid NEXT (Near End Cross Talk) and to maintain
the transmissions characteristics of the Category. Category specifications
require that pair twisting be maintained to within the following distances from
the outlet termination:
• Category 3 maximum allowed untwisting: 3 inches
• Category 4 maximum allowed untwisting: 1 inch
• Category 5 maximum allowed untwisting: 1/2 inch
Can I mix CAT 3 and CAT 5 cabling in the same building?
Yes, but keep in mind, you will not have CAT 5 performance. It is a good idea
to keep the lines separated and when installing any new lines, use CAT 5 UTP
cabling only.
Can a Four-Pair CAT 5 cable support two 100BASE-TX
devices?
Although only two pairs are used in the standard four-pair CAT 5 UTP cable, it
is not recommended because it exceeds the specifications outlined by IEEE
802.3u.
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Appendix F Warranties and Notices 23
Appendix E Mounting Templates
The Fast EtheRx hubs can be stationed on a flat surface using the four rubber
feet provided, or mounted to a standard 19-inch rack by using the mounting
brackets on each side of the unit.
Rubber Feet for Desktops
The Fast EtheRx hubs may use rubber feet applied to the bottom of the unit for
desktop surfaces or stacking hubs on top of one another. The four (4) rubber
feet have peel-off adhesive backing. Remove the backing and attach the feet to
the bottom of the hub.
Brackets for Rack Mounting
The Fast EtheRx hubs can also be mounted to a standard 19-inch rack by
attaching the angle brackets to each side of the hub. Align the holes in the
brackets with the side mount holes on the hub. Use the 8 bracket screws
provided to attach the brackets. When the hub is placed into a 19-inch rack, use
the 4 large knob rack-mount screws to secure the hub to the rack. See Figure E1 below:
Fig. E-1-Attaching the Mounting Brackets
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
24 Appendix F Warranties and Notices
Appendix F Product Warranties and Notices
Limited Warranty Statement
KINGSTON TECHNOLOGY COMPANY ("Kingston") warrants that this product is free
from defects in material and workmanship. Subject to the conditions and limitations set
forth below, Kingston will, at its option, either repair or replace any part of this product
which proves defective by reason of improper workmanship or materials. Repair parts or
replacement products will be provided by Kingston on an exchange basis, and will be
either new or refurbished to be functionally equivalent to new.
This warranty does not cover any damage to this product which results from accident,
abuse, misuse, natural or personal disaster, or any unauthorized disassembly, repair or
modification.
Duration of Warranty
Lifetime Warranty: The following Kingston products are covered by this warranty for
life: solid state memory (e.g., memory modules and boards), networking adapters,
networking hubs without cooling fans (excluding the power supply), solid state PC Card
(PCMCIA) adapters, and microprocessor upgrade products.
Seven Year Warranty: The following Kingston products are covered by this warranty for
a period of seven years from the date of original retail purchase: storage enclosures
(including the power supply), cables, terminators, and accessories.
Five Year Warranty: The following Kingston products are covered by this warranty for
a period of five years from the date of original retail purchase: the power supply in
networking hubs without cooling fans; and all other Kingston products (other than those
products covered by a three-year, two-year, or one-year warranty, as provided below).
Three Year Warranty: The following Kingston products are covered by this warranty for
a period of three years from the date of original retail purchase: networking hubs with
cooling fans (including the power supply).
Two Year Warranty: The following Kingston products are covered by this warranty for a
period of two years from the date of original retail purchase: Solid State Floppy Disk
Cards (SSFDC), and Winchester hard disk drives in a 2.5 inch, 3.5 inch or 5.25 inch form
factor.
One Year Warranty: The following Kingston products are covered by this warranty for a
period of one year from the date of original retail purchase: Winchester hard disk drives
in a 1.8 inch form factor, optical storage products,
and magnetic tape storage products.
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
Appendix F Warranties and Notices 25
Warranty Claim Requirements
To obtain warranty service, return the defective product, freight prepaid and insured, to
your local authorized Kingston dealer or distributor, or to the Kingston factory service
center located at 17600 Newhope Street, Fountain Valley, California 92708, U.S.A. You
must include the product serial number (if applicable) and a detailed description of the
problem you are experiencing. You must also include proof of the date of original retail
purchase as evidence that the product is within the applicable warranty period. If you
return the product directly to the Kingston factory, you must first obtain a Return
Material Authorization ("RMA") number by calling Kingston Customer Service at
(714) 438-1810, and include the RMA number prominently displayed on the outside of
your package. Products must be properly packaged to prevent damage in transit.
Free Technical Support
Kingston provides free technical support. If you experience any difficulty during the
installation or subsequent use of a Kingston product, please contact Kingston’s Technical
Support department prior to servicing your system.
Kingston Technical Support can be reached in the U.S. at (714) 435-2639 or toll-free at
(800) 435-0640 (U.S. and Canada only). Kingston European Technical Support can be
reached from within the U.K. at 01932 738858. Kingston provides other service numbers
when calling from Germany 0130 115 639 or fax 0130 860 599, from Austria 0660 5569
or fax 06 607 434, from Switzerland 0800 557 748 or fax 0800 552 182, from France
0800 905 701 or fax 0800 900 910, or from Belgium (in English) 0800 72763.
This warranty covers only repair or replacement of defective Kingston products, as
provided above. Kingston is not liable for, and does not cover under warranty, any costs
associated with servicing and/or the installation of Kingston products.
Disclaimers
The foregoing is the complete warranty for Kingston products and supersedes all
other warranties and representations, whether oral or written. Except as expressly
set forth above, no other warranties are made with respect to Kingston products and
Kingston expressly disclaims all warranties not stated herein, including, to the
extent permitted by applicable law, any implied warranty of merchantability or
fitness for a particular purpose. In no event will Kingston be liable to the
purchaser, or to any user of the Kingston product, for any damages, expenses, lost
revenues, lost savings, lost profits, or any other incidental or consequential damages
arising from the purchase, use or inability to use the Kingston product, even if
Kingston has been advised of the possibility of such damages.
Copyright © 1997 Kingston Technology Company. All rights reserved. Printed in Taiwan. Kingston Technology and
the Kingston logo are trademarks of Kingston Technology Company. All other logos and trademarks are property of
their respective companies.
Revised 10/97
KNE24TX/RS User’s Guide - Rev. A01 Kingston Technology Company
26 Appendix F Warranties and Notices
F.C.C. Certification
This device has been tested and found to comply with limits for Class A digital device,
pursuant to Part 15 of the FCC Rules. Operation is subject to the following conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received; including
interference that may cause undesired operation.
CE Notice
The official CE symbol indicates compliance of this Kingston Technology product to the
EMC directive of the European Community. The CE symbol found here or elsewhere
indicates that this Kingston product meets or exceeds the following standards:
❑ EN50081-1 “Electromagnetic Compatibility-generic emissions standard”
EN55022: “Limits and methods of measurement of radio
❑ EN50082-1 “Electromagnetic Compatibility-generic immunity standard”
IEC 801-2: “Electrostatic discharge requirements”
IEC 801-3: “Radiated immunity requirements”
IEC 801-4: “Electrical fast transient requirements”
❑ EN60950 “Low Voltage Directive (LVD)”
interference characteristics.”
❑ Declaration of CE Conformity in accordance with the above standards has been
made and is on file at Kingston Technology.
Kingston Technology Company KNE24TX/RS User’s Guide - Rev. A01
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