Kingston Technology Switch KNE24TX RS User Manual

KINGSTON TECHNOLOGY  
FAST ETHERX STACKABLE  
8-PORT, 12-PORT, & 24-PORT  
100BASE-TX 19” RACK-MOUNTABLE  
FAST ETHERNET HUBS  
USER’S GUIDE  
MODELS: KNE8TX/RS  
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  
A01  
KNE24TX/RS User’s Guide - Rev.  
 
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  
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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  
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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  
II  
I
100BASE-TX Class  
and Class  
compliant repeaters which conform to  
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.  
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  
II  
for uplinking to one other 100BASE-TX Class  
repeater. The Fast EtheRx  
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.  
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.  
Descriptio
KNE100FX/RSC  
Optional 100BASE-FX Fiber Optic Plug-In Module  
with SC (Subscriber Connect) connectors  
Optional 100BASE-FX Fiber Optic Plug-In Module  
with ST (Straight Tip) connectors  
KNE100FX/RST  
Model Types  
100BaseTX Class II Repeater  
Utilization  
%
1
2
3
4
5
6
7
8
x
8
1
12 25 50 100  
100BaseTX Fast Ethernet Stackable Hub  
Link / Act  
PWR COL FX/ON  
1
2
3
4
5
6
7
8
KNE8TX/RS  
FX  
Error  
/
Partition  
MDI-X  
MDI  
Fast EtheRx KNE8TX/RS  
8-Port Model  
100BaseTX Class II Repeater  
12  
10 11 12  
Utilization  
%
1
2
3
4
5
6
7
8
9
x
1
12 25 50 100  
100BaseTX Fast Ethernet Stackable Hub  
Link  
/
Act  
PWR COL FX/ON  
1
2
3
4
5
6
/
7
8
9
10 11 12  
KNE12TX/RS  
FX  
Error  
Partition  
MDI-X  
MDI  
Fast EtheRx KNE12TX/RS  
12-Port Model  
1
2
3
4
5
6
7
8
9
10  
11  
23  
12  
100BASE-TX  
II  
Class Repeater  
UTIL%  
Stackable 100BASE-TX  
Fast Ethernet Hub  
1
1
2
2
5
5
0
6
0
Link  
5
/
Act  
6
/
Partition  
F
X
1
2
3
4
7
8
9
1
0
1
1
1
2
P
W
R
C
O
L
L
KNE24TX/RS  
F
X
/
O
N
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
24  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
24  
Fast EtheRx KNE24TX/RS  
KNE24TX/RS User’s Guide - Rev. A01  
Kingston Technology Company  
 
4
Introduction  
Special Features  
I
II  
compliant repeater  
100BASE-TX Class  
or Class  
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  
II  
cascading to another 100BASE-TX Class  
repeater  
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  
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  
50-pin shielded stacking cable  
ο
ο
ο
AC power cord  
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 the Kingston name and logo are not on the front panel  
of your unit, it’s not a genuine Kingston product.  
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, Collision-  
Handling, 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  
II  
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.  
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 sub-  
standard links from generating streams of false carrier and interfering with  
other links.  
KNE24TX/RS User’s Guide - Rev. A01  
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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  
100BASE-TX UTP Ports  
Fiber Module Detection LED  
Utilization LEDs  
1
2
3
4
5
6
7
8
9
10  
11  
23  
12  
100BASE-TX  
II  
Class Repeater  
UTIL%  
Stackable 100BASE-TX  
Fast Ethernet Hub  
1
1
2
2
5
5
0
6
0
Link  
5
/
Act  
6
/
Partition  
F
X
1
2
3
4
7
8
9
1
0
1
1
1
2
P
W
R
C
O
L
L
KNE24TX/RS  
F
X
/
O
N
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
2
2
3
2
4
24  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
24  
Power LED  
Link / Activity / Partition LEDs  
Uplink Ports  
Collision LED  
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.  
2.  
Make sure the power is turned on for both the PC and Fast EtheRx  
Hub. The power LED should be lit.  
Verify the network drivers have been loaded on the PC. Some adapters require  
the drivers to be loaded to establish a proper link.  
3.  
4.  
Make sure the cable is wired properly and connected on both ends.  
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 (  
), may be used.  
or  
KNE24TX/RS User’s Guide - Rev. A01  
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8
Hardware Installation  
Use the MDI-X port  
when connecting to  
Use the MDI port  
when connecting to  
a hub or other MDI-X  
device.  
a
network card or  
other MDI device.  
8
8
8
8
Using a Straight-Through Cable  
Using a Crossover Cable  
Use the MDI-X port  
when connecting to  
a hub or other MDI-X  
device.  
Use the MDI port  
when connecting to  
a
network card or  
other MDI device.  
8
8
8
8
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  
II  
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:  
Port  
Connector  
Port  
Config  
For Connection to  
Another Hub Port (MDI-X)  
For Connection to a Network  
Adapter or Router (MDI)  
MDI-X  
MDI  
Use Crossover cable  
Use Straight-through cable  
Use Crossover cable  
Use Straight-through cable  
Table 1. Port Configurations  
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KNE24TX/RS User’s Guide - Rev. A01  
 
Hardware Installation  
9
Rear Panel  
OUT  
IN  
PWR  
PWR  
PWR  
100FX Fiber Module  
100FX Fiber Module  
100FX Fiber Module  
Stckable Module  
Stckable Module  
Stackable Module  
100-240VAC  
100-240VAC  
100-240VAC  
/
/
/
50-60Hz 2.0A Max  
50-60Hz 2.0A Max  
50-60Hz 2.0A Max  
OUT  
IN  
OUT  
IN  
100BASE-FX Fiber Optic  
Power  
Switch  
Stacking Ports  
AC Power  
Connector  
Plug-in Module  
(optional)  
Dual Fan Units  
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  
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10  
Hardware Installation  
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  
OUT  
Stack  
up to  
6 hubs  
maximum  
IN  
PWR  
100FX Fiber Module  
100FX Fiber Module  
100FX Fiber Module  
Staable Module  
Staable Module  
Stackable Module  
100-240VAC  
100-240VAC  
100-240VAC  
/
/
/
50-60Hz 2.0A Max  
50-60Hz 2.0A Max  
50-60Hz 2.0A Max  
Stckable Module  
Stckable Module  
Stackable Module  
100-240VAC / 50-6  
100-240VAC / 50-6  
100-240VAC / 50-6  
OUT  
IN  
PWR  
PWR  
OUT  
IN  
OUT  
IN  
OUT  
IN  
PWR  
PWR  
PWR  
100FX Fiber Module  
100FX Fiber Module  
100FX Fiber Module  
Staable Module  
Staable Module  
Stackable Module  
100-240VAC  
100-240VAC  
100-240VAC  
/
/
/
50-60Hz 2.0A Max  
50-60Hz 2.0A Max  
50-60Hz 2.0A Max  
OUT  
IN  
OUT  
IN  
OUT  
IN  
Fig. 3. Stacking Additional Hubs  
Kingston Technology Company  
KNE24TX/RS User’s Guide - Rev. A01  
 
Hardware Installation  
11  
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  
RX  
TX  
TX  
100odule  
100odule  
Fig. 4. Model KNE100FX/RSC  
with SC connectors  
Fig. 5. Model KNE100FX/RST  
with ST connectors  
KNE24TX/RS User’s Guide - Rev. A01  
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12  
Appendices  
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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.  
1
2
3
4
5
6
7
8
9
10  
11  
12  
100BASE-TX  
II  
Class Repeater  
UTIL%  
Stackable 100BASE-TX  
Fast Ethernet Hub  
1
1
2
2
5
5
0
6
0
Link  
5
/
Act  
6
/
Partition  
FX  
1
2
3
4
7
8
9
10 11 12  
PWR  
COLL  
KNE24TX/RS  
FX/ON  
13 14 15 16  
17 18 19 20  
21 22 23 24  
24  
13  
14  
15  
16  
17  
18  
19  
20  
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.  
1
2
3
4
5
6
7
8
Modular  
Connector  
Fig. A-1 RJ-45 Connector Pin Numbers  
Pin Number  
MDI-X  
MDI  
1
2
Receive Data +  
Receive Data -  
Transmit Data +  
Not Used  
Transmit Data +  
Transmit Data -  
Receive Data +  
Not Used  
3
4,5  
6
Transmit Data -  
Not Used  
Receive Data -  
Not Used  
7,8  
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:  
4-Pair 100UTP CAT 5  
(only 2 pairs used)  
Max. Cable Length:  
Hub to Workstation  
Hub to Hub  
100M (328ft)  
5M (16.4ft)  
8-Pin RJ-45 CAT 5 only  
8-Pin RJ-45 CAT 5 only  
Star  
Modular Plug:  
Patch Panel:  
Network Topology:  
Table B-1. Network Cable Guidelines  
UTP Cable Wiring  
100BASE-TX unshielded twisted-pair cables can be wired as "Straight-  
Through" 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"  
Cable Wiring  
Crossover”  
Cable Wiring  
Pin Number  
Pin Number  
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  
1 (TRX +)  
2 (TRX -)  
3 (RCV +)  
6 (RCV -)  
4, 5, 7, 8  
3 (RCV +)  
6 (RCV -)  
1 (TRX +)  
2 (TRX -)  
Not Used  
Table B-2. Straight-Through Wiring  
Table B-3. Cross Over Wiring  
Kingston Technology Company  
KNE24TX/RS User’s Guide - Rev. A01  
 
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 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 3 Pair 1 Pair 4  
Pair 2 Pair 1  
Pair 4  
1 2 3 4 5 6 7 8  
1 2 3 4 5 6 7 8  
T568A  
T568B  
Fig. B-1. 4-Pair T568A Wiring  
Fig. B-2. 4-Pair T568B 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  
Pin 3  
Pin 4  
Pin 5  
Pin 6  
Pin 7  
Pin 8  
Pair 3  
Pair 2  
Pair 1  
Pair 1  
Pair 2  
Pair 4  
Pair 4  
Orange  
Black  
Red  
Green/White  
White/Orange  
Blue/White  
Pin 2  
Pin 3  
Pin 4  
Pin 5  
Pin 6  
Pin 7  
Pin 8  
Pair 2  
Pair 3  
Pair 1  
Pair 1  
Pair 3  
Pair 4  
Pair 4  
Yellow  
Blue  
Orange/White  
White/Green  
Blue/White  
Red  
Green  
Yellow  
Brown  
White  
White/Blue  
Green  
Orange  
Brown  
White  
White/Blue  
Orange/White  
White/Brown  
Brown/White  
Green/White  
White/Brown  
Brown/White  
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  
baseband networks  
Media Interface:  
KNE8TX/RS  
KNE12TX/RS  
8 UTP ports for 100BASE-TX connections  
12 UTP ports for 100BASE-TX connections  
8 or 12 LEDs for Link (Green) & Activity (flashing  
green)  
Diagnostic LEDs:  
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)  
RJ-45, Female  
Connector Type:  
Cable Grade:  
Category 5 or better  
Cable Type:  
UTP 26 to 22 AWG  
Stacking Cable:  
Additional Stacking:  
Max. segment length:  
50-pin shielded cable  
Up to 6 hubs maximum  
100m (328 ft)  
Environmental:  
Operating Temp.  
Storage Temp.  
0°C to 45°C (32°F to 113°F)  
-20°C to 60°C (-4°F to 140°F)  
10% to 90% non-condensing  
Relative Humidity  
Electrical:  
Input Voltage:  
100-240VAC, 50/60Hz Auto-sense, internal power  
supply  
Output Voltage:  
Power Consumption:  
KNE8TX/RS  
5VDC / 8A  
15 Watts maximum  
21 Watts maximum  
KNE12TX/RS  
Physical:  
Dimension  
(H x L x D):  
Weight:  
1.70” x 17.32” x 10”  
(43.2mm x 440mm x 254mm)  
KNE8TX/RS  
KNE12TX/RS  
8.10 lbs (3.69 kg)  
8.18 lbs (3.71 kg)  
Certification  
EMI Standards:  
EMC Standards:  
Low Voltage Directive:  
Safety Standards:  
FCC Class A, CE CISPR A  
EN55022, IEC801-2, IEC801-3, IEC801-4  
EN60950  
UL, CSA, TUV  
Optional Accessories:  
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  
baseband networks  
Media Interface:  
Diagnostic LEDs:  
24 UTP ports for 100BASE-TX connections  
24 LEDs for Link (Green), Activity (flashing Green),  
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)  
Port 24 supports crossover and straight-thru cable  
RJ-45, Female  
Uplink Port:  
Connector Type:  
Cable Type:  
UTP 26 to 22 AWG  
Cable Grade:  
Category 5 or better  
Stacking Cable:  
Additional stacking:  
Max. segment length:  
Inter-repeater link:  
No. of repeaters:  
Cable Length:  
50-pin shielded cable  
Up to 6 hubs maximum  
100m (328 ft)  
Two (2) Class II repeaters maximum  
5 meters (16.4 feet)  
Environmental:  
Operating Temp.  
Storage Temp.  
Relative Humidity  
0°C to 45°C (32°F to 113°F)  
-20°C to 60°C (-4°F to 140°F)  
10% to 90% non-condensing  
Electrical:  
Input Voltage:  
100VAC - 240VAC, 50/60Hz  
Auto-sensing, internal power supply  
5VDC / 8A  
Output Voltage:  
Power Consumption:  
27W maximum  
Physical:  
Dimension  
(H x L x D):  
Weight:  
1.70” x 17.32” x 10”  
(43.2mm x 440mm x 254mm)  
9.25 lbs. (4.2 kg)  
Certification:  
EMI Standards:  
FCC Class A, CE CISPR A, C-Tick  
EN55022, IEC801-2, IEC801-3, IEC801-4  
EN60950  
EMC Standards:  
Low Volt Directive:  
Safety Standards:  
UL, cUL, TUV  
Optional Accessories:  
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  
I
II  
100BASE-TX Fast Ethernet  
Class  
vs. Class  
Repeaters  
There are currently two classes of Fast Ethernet repeaters, defined as Class  
Class II  
I
and  
.
Class  
I
: in a maximum length segment topology, only one Class  
I
repeater may exist between any two nodes within a single  
collision domain.  
Class II : in a maximum length segment topology, two Class II  
repeaters may exist between any two nodes within a single collision  
domain.  
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 UTP or 150 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 E-  
1 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  
interference characteristics.”  
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)”  
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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