KTI Networks Network Card DH 8T User Manual

Installation Guide  
10Base-T Ethernet Hub  
Model: DH8T  
DOC.980213-DH8T-K  
P/N: 750-0104-001  
 
The information contained in this document is subject to change without prior no-  
tice.  
Copyright Ó KTI. All Rights Reserved.  
TRADEMARKS  
Ethernet is a registered trademark of Xerox Corp. NetWare is a registered trademark  
of Novell Inc.  
WARNING:  
This equipment has been tested and found to comply with the limits for a Class A  
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to  
provide reasonable protection against harmful interference when the equipment is  
operated in a commercial environment. This equipment generates, uses, and can  
radiate radio frequency energy and if not installed and used in accordance with the  
instruction manual may cause harmful interference in which case the user will be  
required to correct the interference at his own expense.  
NOTICE:  
(1)The changes or modifications not expressively approved by the party  
responsible for compliance could void the user’s authority to operate the  
equipment.  
(2)Shielded interface cables and AC power cord, if any, must be used in order to  
comply with the emission limits.  
CISPR A COMPLIANCE:  
This device complies with EMC directive of the European Community and meets or  
exceeds the following technical standard.  
EN 55022 - Limits and Methods of Measurement of Radio Interference Characteris-  
tics of Information Technology Equipment. This device complies with CISPR Class  
A.  
WARNING: This is a Class A product. In a domestic environment this product may  
cause radio interference in which case the user may be required to take adequate  
measures.  
CE NOTICE  
Marking by the symbol CE indicates compliance of this equipment to the EMC  
directive of the European Community. Such marking is indicative that this equip-  
ment meets or exceeds the following technical standards:  
EN 55022: Limits and Methods of Measurement of Radio Interference characteris-  
tics of Information Technology Equipment.  
EN 50082/1:Generic Immunity Standard -Part 1: Domestic Commercial and Light Indus-  
try.  
EN 60555-2: Disturbances in supply systems caused by household appliances and similar  
electrical equipment - Part 2: Harmonics.  
 
10BASE-T ETHERNET HUB  
INSTALLATION GUIDE  
DOC.980214-DH8T-NK  
P/N:750-0104-002  
 
Table of Contents  
Chapter 1 Introduction  
Introduction ............................................................................... 1  
Features .................................................................................... 2  
Chapter 2 Installation  
Installation ................................................................................. 3  
Checking AC Power .................................................................. 3  
Chapter 3 Making Network Connection  
Network Connectors .................................................................. 4  
Connecting to an Ethernet Node ............................................... 5  
Hub to Hub Connection via UTP Cable ...................................... 6  
Chapter 4 Interpreting Hub LEDs  
Locations of the Hub LED Indicators ......................................... 8  
Interpretation ............................................................................. 8  
Appendix  
Specifications.......................................................................... 10  
RJ-45 Jack Pin Assignments .................................................. 10  
UTP Cabling Specifications ...................................................... 11  
 
1. Introduction  
Introduction  
This hub is an Ethernet Hub designed for the 10Base-T environment.  
In terms of topology, twisted-pair Ethernet 10Base-T is defined as a  
star topology rather than a bus. Each port on the hub connects to only  
one 10Base-T device via unshielded twisted-pair (UTP) cable.  
The hub provides eight Twisted-Pair (TP) ports (RJ-45 Jacks) and  
one 12V DC power socket on the rear panel. On the front panel,  
there are ten LED indicators for displaying the port status and the  
hub status. The following figure illustrates the front panel and rear  
panel of the hub:  
1
 
Features  
• Network ports: 8 TP ports  
• Standard: TP ports conform to IEEE 802.3 10Base-T std.  
• Provides an additional RJ-45 jack labeled '8C' on the TP Port #8  
for connecting to another hub. A standard straight-through  
10Base-T UTP cable can be used for the hub-to-hub connection.  
• Each TP port has one Link/Rx LED to indicate the link and  
receiving activity status of the UTP link segment.  
• Each TP port can detect and correct wiring polarity reversal  
automatically.  
• Two LEDs are provided to indicate other activities of the hub:  
Power LED  
Power status  
Collision LED Network collision status  
2
 
2. Installation  
Installation  
You can place the hub in an area that meets the following specifica-  
tions:  
Temperature: 5o to 40oC when operating  
Humidity: 10% to 80% when operating  
Dimension: 195 mm x 129 mm x 28 mm (WxDxH)  
Checking AC Power  
One AC power adapter is contained in the hub package. Before you  
begin the installation, check the AC voltage of your area. The AC  
power adapter which is used to supply the DC power for the hub  
should have the AC voltage matching the commercial power voltage  
at your area.  
The specifications of the AC power adapter are:  
AC input power: AC power voltage of your area  
DC output power: 12 VDC 500mA min.  
DC plug type:  
3
 
3. Making Network Connections  
Network Connectors  
The hub has 8 TP ports which are presented by 8 RJ-45 jacks. The  
jacks labeled 1 through 8 are permanently configured as 10Base-T  
MDI-X jacks and the jack labeled '8C' next the jack labeled '8' is an  
alternative jack which is configured as MDI jack for the TP port #8.  
Both jacks can not be used at the same time.  
The MDI-X jacks can support connections to 10Base-T Ethernet  
nodes or lower level hubs via 10Base-T UTP cables. The MDI jack  
'8C' is used for connecting to an upper level hub.  
A 10Base-T UTP cable can be a Category 3, 4, or 5 unshielded  
twisted-pair cable with an RJ45 plug at each end.  
4
 
Connecting to an Ethernet Node  
To connect the hub to a 10Base-T Ethernet node, follow these steps:  
1. Select an appropriate length of 10Base-T UTP cable for the  
connection.  
2. Connect one end of the UTP cable to the MDI jack on the  
remote device (e.g., a PC equipped with 10Base-T Ethernet  
adapter).  
3. Connect the other end of the UTP cable to an available MDI-X  
jack on the hub. It is better to reserve jack #8 for a connection to  
another hub.  
Make sure that the connector on the cable is wired appropriately for  
the standard 10Base-T node. The 'straight through' connection should  
be made from the node through the cable and connectors to the hub.  
Refer to Appendix 'RJ-45 Jack Pin Assignments' for the information  
of UTP wire pairs.  
Hub to Hub Connection via UTP Cable  
5
 
When the number of 10Base-T nodes in your network exceeds eight,  
you need to connect at least two hubs to integrate all 10Base-T nodes  
into one network. You may connect one hub to another hub by using  
an ordinary UTP cable as the following steps:  
1. Connect one end of the UTP cable to the jack labeled '8C' of  
Hub A.  
2. Connect the other end of the cable to any available MDI-X jack  
of Hub B.  
The maximum length of the UTP cable connecting two hubs is 100  
meters.  
6
 
When connecting more than two hubs via TP ports and UTP cables,  
it is important to minimize the number of hubs in any path of the  
network.  
You may select one hub to serve as a primary hub to which other  
hubs will be connected. This will minimize the number of hubs in any  
path (node to node) on the network. The following figure illustrates  
an example of connection topology:  
7
 
4. Interpreting Hub LEDs  
Locations of the Hub LED Indicators  
The hub provides the following LEDs :  
• One Power status LED  
• One Collision status LED  
• Eight Link and activity status LEDs. One for each TP port  
Interpretations  
Power LED  
The LED indicates the status of the hub's power source. Match the  
activity of the LED with one of the states indicated in the table.  
State Indication Interpretation  
On  
Normal  
The power of the hub is on.  
Off Problem  
No power is being supplied to the hub.  
8
 
Collision LED  
This LED indicates the collision detected by the hub. The LED is  
normally off and it blinks when there are collisions. As the frequency  
of collisions on a network increases, the blink activities (on-time) of  
the LED also increase.  
Link/Rx LED  
Each TP port has one Link/Rx LED to indicate the link status and  
receiving activities of the connection to the attached device.  
State Indication Interpretation  
On  
Normal  
the UTP link is in good condition and no  
receiving activities are present.  
Blink Normal  
Off Normal  
the UTP link is in good condition and  
there receiving activities are present.  
No active device is connected at the  
other end of the UTP link.  
9
 
Appendix  
Specifications  
Temperature: Operating 5o to 40o C  
Storage  
Operating 10% to 80%  
Storage 5% to 90%  
-40o to 70o C  
Humidity:  
Dimension:  
195mm (W) x 129mm (D) x 28mm (H)  
7.7 inch (W) x 5.1 inch (D) x 1.1 inch (H)  
RJ-45 Jack Pin Assignments  
The following illustrations indicate the pin assignments of the RJ-45  
jacks on the hub.  
Jacks '1'-'8'  
Jack '8C'  
Pin Jack Assignment  
Jack Assignment  
1
2
3
4
5
6
7
8
INCOMING DATA 1(+) OUTGOING DATA1(+)  
INCOMING DATA 1(-) OUTGOING DATA 1(-)  
OUTGOING DATA 1(+)INCOMING DATA 1(+)  
(No Connection)  
(No Connection)  
(No Connection)  
(No Connection)  
OUTGOING DATA 1(-) INCOMING DATA 1(-)  
(No Connection)  
(No Connection)  
(No Connection)  
(No Connection)  
10  
 
UTP Cabling Specifications  
The hub's TP ports support standard 10Base-T cable topologies and  
types, including Category 3, 4, or 5 unshielded twisted pair cable. The  
maximum length supported by the Ethernet is 100 meters of UTP  
cable. The cable, quality, distance, and connectors must comply with  
the EIA/TIA 568 'Commercial Building Wiring Standard'.  
The following figure illustrates the cable types used for different con-  
nections:  
11  
 

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