Transition Networks Switch 33022B User Manual

LANMASTER T8 8-PORT HUB  
SPECIFICATIONS  
Standards  
IEEE 802.3  
Physical  
Dimensions  
137 mm x 137 mm x 25 mm  
LANMaster™ T8  
Power  
8-Port Ethernet™ Hub  
Power Supply Adapter  
(E-TBT-HB-0804)  
AC Input (47-63 hertz):  
PN  
Requirement  
120 volts, 60 hertz, 28 watts  
230 volts, 50 hertz, 28 watts  
100 volts, 50-60 hertz, 28 watts Japan  
240 volts, 50 hertz, 28 watts  
240 volts, 50 hertz, 28 watts  
Location  
USA/Canada/Mexico  
Europe  
33022.B  
3532  
3535  
3534  
3533  
3536  
United Kingdom  
Australia  
DC Output:  
12 volts at 800 mA maximum.  
For assistance in installing, using, or  
maintaining the TRANSITION Networks  
LANMaster T8 8-Port Ethernet™  
Repeater Hub, contact TRANSITION  
Networks Technical Support at:  
Environment  
Temperature:  
0-50°C (32° to 122° F )  
Humidity  
Altitude  
10-90%, non condensing  
0-10,000 feet  
(800) 260-1312  
Warranty  
Lifetime  
or contact your local distributor.  
 
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ETHERNET CABLE SPECIFICATIONS  
Maximum number of terminal devices on Ethernet network:  
1024  
Table of Contents  
10BASE-5 Cable and Connector Specifications  
The physical characteristics of the 10BASE-5 cable must meet or exceed IEEE  
802.3 10BASE-5 specifications.  
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1  
The LANMaster T8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1  
Networking the LANMaster T8 . . . . . . . . . . . . . . . . . . . . . . .2  
Connectors, Switch, Indicators, . . . . . . . . . . . . . . . . . . . . . .3  
10BASE-5 Cable Characteristics:  
Cable type:  
Impedance:  
Capacitance:  
RG8 Solid Coaxial (ThickNet)  
50 @ 10 MHz  
26pF/ft  
Maximum Cable Length:  
Maximum number network connections: 100  
500 meters (1650 feet)  
2 SITE CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 4  
Minimum distance between connections: 2.5 meters (8.2 feet)  
3 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
Terminate 10BASE-5 cable at one end using a 50 ohm terminator and at the  
other end using a 50 ohm terminator grounded to earth ground.  
Unpacking the LANMaster T8 . . . . . . . . . . . . . . . . . . . . . . . .5  
Installing LANMaster T8 at Site . . . . . . . . . . . . . . . . . . . . . . .6  
Installing Network Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . .7  
10BASE-T Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7  
10BASE-2 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8  
10BASE-5 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8  
10-Mb/s Network Configuration Guidelines . . . . . . . . . . . . . . .9  
Installing Twisted-Pair 10BASE-T Cable . . . . . . . . . . . . . . . . . .11  
Installing Thinnet 10BASE-2 Cable . . . . . . . . . . . . . . . . . . . . .12  
Installing Thicknet 10BASE-5 Cable . . . . . . . . . . . . . . . . . . . .13  
Powering the LANMaster T8 . . . . . . . . . . . . . . . . . . . . . . . .14  
AUI Cable and Connector Specifications  
The cable is a special 4-pair individually shielded with an overall braided  
shield.  
Maximum AUI Cable Length:  
50 meters (165 feet)  
AUI Connector Characteristics:  
AUI Port:  
Male DB-15 with locking posts.  
AUI Connection: Cable shell must be grounded.  
Connector Legend: 1 Logic Ref.  
2 Collision+  
6 Power Return 11 Logic Ref  
7 N/C  
12 Receive  
13 Power  
14 Logic Ref.  
15 N/C  
3 Transmit+  
8 Logic Ref.  
9 Collision--  
10 Transmit-  
4 Logic Ref.  
4 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
Monitoring Power LED . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
Monitoring Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . .15  
5 Receive+  
10BaseFL Cable and Connector Specifications  
The physical characteristics of the 10BaseFL cable must meet or exceed IEEE  
802.3 10BaseFL specifications.  
5 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 16  
Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16  
Technical Support Contact . . . . . . . . . . . . . . . . . . . . . . . . .16  
10BaseFL Cable Characteristics:  
Fiber Optic Cable Recommended:  
Optional:  
62.5/125 µm multimode fiber  
100/140 µm multimode fiber  
85/125 µm multimode fiber  
50/125 µm multimode fiber  
WARRANTY STATEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 17  
ETHERNET CABLE SPECIFICATIONS. . . . . . . . . . . . . . . . . . 19  
LANMASTER T8 8-PORT HUB SPECIFICATIONS . . . . . . . 21  
Fiber Optic Transmitter Power:  
Fiber Optic Receiver Sensitivity:  
Average power: -15.0 dBm  
Peak power:-12.0 dBm ±1dBm  
Average sensitivity: -27.4 dBm  
Bit error rate:  
10-10  
Maximum Cable Length:  
2000 meters (6500 feet)  
10BaseFL Connector Characteristics:  
ST type connectors (SMA type available upon request)  
 
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The sole purpose of this remedy shall be provided the customer with the replacement or  
repair of non-conforming goods in the manner described in this Warranty statement. This  
exclusive remedy shall not be deemed to have failed of its essential purpose so long as TN is  
willing and able to repair or replace the defective item(s) or refund the purchase price.  
1. INTRODUCTION  
This guide is intended for the system or network administrator  
responsible for installing and monitoring a TRANSITION Networks  
LANMaster™ T8 8-Port Ethernet™ Repeater Hub. A working  
knowledge of local area network (LAN) operations, including  
familiarity with communications protocols used on interconnected  
LANs, is assumed.  
TN reserves the right to inspect products claimed to be defective under warranty either at the  
customer’s location or at TN’s plant. TN assumes no liability for liability charges incidental  
to the adjustment, service, repairing, removal or replacement of the product, or other costs,  
or the expense of repairs made outside of its factory, except when made with TN’s prior  
written consent. Additionally, Transition Networks reserves the right to charge for all testing  
and shipping incurred, if after testing, a return is classified as “No Problem Found”.  
TNs total liability in connection with the products and their installation to all persons and  
from all causes in the aggregate, whether in contract, tort, or strict liability, shall not exceed  
the amount paid to TN for the product directly related to the alleged damage. However, in  
no event shall TN have any liability to a customer or any third party for products  
manufactures according to the customer’s specifications.  
The LANMaster T8  
The TRANSITION Networks LANMaster T8 8-Port Ethernet Repeater  
Hub is a 10 Mb/s network device that connects 10BASE-T and  
10BASE-2 OR 10BASE-5 Ethernet segments into a single Ethernet  
network.  
C. Return Procedure  
The customer must follow this procedure for the return of defective items:  
1. Locate the serial number(s) of the item(s) to be returned.  
2. Determine the date the item(s) was received.  
3. Contact Transition Networks Technical Support to determine if the problem can be  
corrected on site.  
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If not, and the product is covered by warranty, then:  
LANMaster T8 Front  
Call the distributor directly or contact TN.  
Request a Return Material Authorization (RMA).  
Ship the item, prepaid in original packaging to Transition Networks at the above  
address.  
1
2
3
4
Act  
Include the RMA number on the outside of the carton and/or on the Packing List.  
Include a copy of the RMA form.  
Include a copy of the original invoice or packing list (if possible) to expedite  
processing.  
5
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AUI  
BNC  
Link Status  
LANMaster T8 Back  
The item(s) may be shipped by the customer or the distributor.  
Transition Networks will repair or replace the unit, at TN’s discretion, and cover the  
cost of the return freight to the distributor or to the customer, whichever requested  
the RMA number.  
Features:  
Eight fixed RJ-45 twisted-pair connectors at front provide  
terminal device connections  
If the item(s) was received more than five years ago, or if the item(s) is no longer covered by  
warranty for other reasons, then:  
Optional RJ-45 uplink port connector at front eliminates need  
for crossover cable between hubs  
Call the distributor or contact TN.  
Request a Material Repair Authorization number (MRA).  
Ship the item(s), prepaid, in the original packaging to Transition Networks at the  
above address.  
Include the MRA number on the outside of the carton add/or on the Packing List.  
Include a copy of the MRA form.  
Include a copy of the original invoice or packing list (if possible) to expedite processing.  
Only the customer (end-user) may send the items(s) to TN.  
TN will contact the customer after the item(s) have been received, inspected, and a  
cost estimate of the repair determined.  
BNC and AUI connectors at back provide optional connection  
to EITHER 10BASE-2 OR 10BASE-5  
LED indicators at front provide continuous LANMaster T8  
network traffic data  
The repair charges may be billed, with customer’s approval, though the distributor, or  
on a prepaid or C.O.D. basis directly to the customer. The charges will include the  
cost of shipping.  
The return authorization numbers are valid only for 90 days from the date issued.  
 
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Warranty Statement  
A. Five Year Warranty  
Networking the LANMaster T8  
Transition Networks, Inc. (TN) warrants, for a period of five years, that TN products (with  
the exception of power supplies and fans that TN warrants for two years) will be free from  
defects in materials and workmanship, and will be in conformity with TN’s specifications.  
The LANMaster T8  
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Repeater Hub can be  
installed in an Ethernet  
network by connecting  
10BASE-T cable between  
RJ-45 connectors at the  
front of the LANMaster  
T8 and various network  
terminal devices.  
TNs warranty on products manufactured by or assembled for TN in accordance with a  
customer’s specifications, is a five-year warranty that the goods conform to such  
specifications.  
The warranty is invalidated if the goods have been subject to alterations, misuse, accident,  
Acts of God (e.g., damage by floods, lightning strikes, Etc.), tampering, improper  
maintenance, improper installation, or abuse. If the user is unsure about the proper means  
of installing or using the equipment, contact TN’s free Technical Support or Network  
Design Services, which can be reached by:  
Telephone  
Fax  
E-mail  
1.800.LAN.WANS or 612.941.7600  
612.941.2322  
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Additionally,  
LANMaster T8  
hubs can be  
Internet  
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THE ABOVE WARRANTY IS EXCLUSIVE AND EXTENDS ONLY TO PRODUCTS  
ASSEMBLED BY TRANSITION NETWORKS, INC. TO THE EXTENT PERMITTED BY LAW,  
TN DOES NOT MAKE AND DISCLAIMS ALL OTHER WARRANTIES, EXCEPT TITLE,  
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY OF  
DESCRIPTION, MERCHANTIBILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-  
INFRINGEMENT, AND ANY WARRANTY BASED UPON PRIOR WRITTEN OR ORAL  
REPRESENTATIONS REGARDING SUCH PRODUCTS MADE BY TN, ITS EMPLOYEES,  
AGENTS, OR REPRESENTATIVES.  
cascaded using  
twisted-pair  
10BASE-T cable  
and the X  
(crossover) uplink  
RJ-45 connector.  
B. Limitations and Exclusions  
If the customer believes any goods sold by TN are defective and within the warranty period,  
the following general procedure will be followed:  
1. Locate the serial number and delivery date of the item(s).  
2. Notify TN within the warranty period.  
3. TN will promptly issue a return authorization form for the goods.  
4. Upon receiving the form, the customer will promptly return the item(s) at customers  
own expense, shipped prepaid, to the distributor from which it was purchased, or  
directly to TN.  
And, the BNC connector on the LANMaster T8 back can be connected  
to 10BASE-2 or the AUI connector on the LANMaster T8 back can be  
connected to to 10BASE-5 (or, through a media converter installed on  
the AUI connector, to 10BASE-T, 10BASE-5, or 10BASE-FL).  
TN will only accept goods for return if the following conditions have been met:  
1. A return form is obtained from TN.  
2. The freight charges have been prepaid by the customer.  
3. Goods are re-packed in their original packaging.  
If under warranty TN shall, at its option, (1) repair the goods free of charge (2) replace the  
goods free of charge, or (3) accept the return of the item(s) and credit the current price to  
the reseller (within 90 days of purchase), or (4) if the goods are not under warranty, will  
repair the item(s) at a minimum charge of USD $200 (two hundred U.S. dollars) per item.  
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THIS IS THE EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY. IN NO EVENT  
SHALL TRANSITION NETWORKS BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR  
CONSEQUENTIAL DAMAGES OF ANY KIND, WHETHER FOR BREACH OF ANY  
CONDITION OF SALE, FOR NEGLIGENCE, ON THE BASIS OF STRICT LIABILITY,  
CONTRACT, OR OTHERWISE AND IRRESPECTIVE OF WHETHER TN IS INFORMED BY  
CUSTOMER OF THE POSSIBILITY OF SUCH DAMAGES IN ADVANCE OF THIS SALE.  
 
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Connectors and Indicators  
CONNECTORS  
5. MAINTENANCE  
WARNING: DO NOT, UNDER ANY CIRCUMSTANCES, open  
and attempt to repair the LANMaster T8. Failure to observe this  
warning could result in personal injury or death from electrical  
shock.  
Straight-through RJ-45 Connectors  
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Crossover RJ-45 (X) Connector  
NOTE: Failure to observe the above warning will immediately void the  
warranty.  
Eight (8) straight-through RJ-45 connectors, labeled 1-8, and one (1)  
crossover RJ-45 connector, labeled X, are located on the front of the  
LANMaster T8.  
Fault Isolation  
Power Adapter Connector  
If two network devices fail to communicate through the LANMaster T8,  
consider the following:  
LED Indicators  
Are the LEDs described in the previous section functioning  
properly?  
1
2
3
4
Act  
5
6
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8
AUI  
BNC  
Link Status  
Do network devices have Link Integrity enabled?  
BNC Connector  
Do network devices communicate when the LANMaster T8 is  
not installed between them?  
AUI Connector  
One (1) AUI connector, one (1) BNC connector, and one (1) AC  
power supply adapter connector are located on the back of the  
LANMaster T8.  
Is flat or “silver satin” wire used in site internal wiring?  
Are internal wiring patch cords, punch down blocks, and wall  
jacks properly pinned or configured?  
LED INDICATORS  
Is the thinnet cable unbroken and properly connected?  
Are network interface cards properly configured?  
Steady green Act(ivity) LED  
indicates connection of the  
LANMaster T8 to external AC  
1 2 3 4  
powerr. Blinking green  
Act(ivity) LED indicate  
network traffic.  
Act  
Technical Support Contact  
For assistance in fault isolation and in maintaining the LANMaster T8,  
contact:  
5 6 7 8  
Link Status  
Steady green Link Status  
LEDs indicate (for each port)  
the integrity of the network  
link at the RJ-45 connector.  
Blinking green Link/Receive  
LEDs indicate (for each port)  
reception of valid data.  
Technical Support  
(800) 260-1312  
or your local distributor.  
 
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4. OPERATION  
2. SITE CONSIDERATIONS  
The LANMaster T8 requires no intervention beyond occasionally  
monitoring the Power and Status LEDs.  
The site for the LANMaster T8 must provide:  
AC power outlet for each LANMaster T8  
Adequate ventilation  
Standard environmental conditions  
Isolation from electrical noise, including radio transmitters and  
broadband amplifiers, motors, high power electrical lines, or  
fluorescent light fixtures.  
1
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4
Act  
5
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AUI  
BNC  
Link Status  
Additionally:  
The twisted pair cables should not run in the same conduit with  
power line cables.  
1 2 3 4  
Act  
Phone lines should be separated from data cables.  
Flat or “silver satin” cables should not be used.  
RJ-45 connected cables should be configured as crossover or  
straight through according to installation requirements.  
5 6 7 8  
And:  
Link Status  
Since the LANMaster T8 is an Ethernet repeater, the entire  
installation should comply with the IEEE Ethernet 802.3  
specification  
Monitoring Status LEDs  
Steady green Act(ivity) LED indicates connection of the LANMaster T8  
to external AC powerr. Blinking green Act(ivity) LED indicate network  
traffic.  
Steady green Link Status LEDs indicate (for each port) the integrity of  
the network link at the RJ-45 connector. Blinking green Link/Receive  
LEDs indicate (for each port) reception of valid data.  
 
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Powering the LANMaster T8  
To power ON the LANMaster T8:  
3. INSTALLATION  
To install the LANMaster T8:  
1. Verify that the LANMaster T8 power supply adapter is the  
correct one for the site installation.  
Unpack the LANMaster T8  
Install LANMaster T8 at site  
Install Network Cable  
2. At LANMaster T8 back, locate the power receptacle.  
Power the LANMaster T8.  
3. Connect the LANMaster T8 power connector end of the  
power supply adapter to LANMaster T8 power receptacle.  
Direction is provided in the pages that follow.  
4. Plug external power connector end (male) of the power  
supply adapter into correct voltage AC wall socket.  
Unpacking the LANMaster T8  
The LANMaster T8 packing contents should include the following:  
5. At LANMaster T8 front, verify that Act(ivity) LED is  
illuminated.  
Item  
Part Number  
LANMaster T8 Hub  
E-TBT-HB-0804  
(includes mounting brackets and screws,  
BNC T-connector and terminator, and  
adhesive-backed rubber feet)  
Power Supply Adapter 3532, 3533, 3534, 3535, or 3536  
(depending upon power configuration  
in country where installed)  
User’s Guide  
33022  
 
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Installing Thicknet 10BASE-5 Cable  
Installing LANMaster T8 at Site  
The LANMaster T8 provides a female AUI connector at the back for  
network connection to 10BASE-5 through an AUI drop cable or to  
10BASE-2, 10BASE-T, or 10BASE-FL through a transceiver.  
NOTE: Mounting brackets, screws, and rubber feet are provided.  
To install the LANMaster T8 on table or other flat surface:  
1. Carefully turn LANMaster T8 to side.  
CONNECTING TO 10BASE-5 USING AUI DROP CABLE  
To connect to 10BASE-5 cable using AUI drop cable:  
2. Install four (4) rubber feet (included with packing material):  
• Separate rubber feet.  
1. Locate or build IEEE 802.3 compliant AUI drop cable.  
• Remove protective paper from  
adhesive surface of rubber foot.  
• Position and secure each rubber  
foot as shown.  
2. Connect AUI drop cable  
male connector to female  
AUI (DTE) connector on  
LANMaster T8.  
3. Return LANMaster T8 to upright  
position.  
3. Connect AUI drop cable  
female connector to the AUI  
port on a 10BASE-5 cable  
transceiver or media  
To install the LANMaster T8 mounting bracket under shelf or on wall:  
2
1. Using mounting bracket as a guide, with  
attachment unit (MAU).  
pencil or other marking device, mark screw  
installation locations on wall or under shelf.  
50 ohm terminator  
4. Verify that 10BASE-5  
segment is terminated at both ends using 50-ohm terminators.  
1
2. Using Phillips screwdriver, install two (2)  
CONNECTING TO NETWORK USING TRANSCEIVER  
NOTE: Refer to transceiver documentation for detailed specifications.  
To connect to network using transceiver:  
screws (included with packing material) at  
installation locations marked on wall or under  
shelf.  
2
3. Using Phillips  
1. Locate IEEE 802.3 compliant transceiver with male AUI  
connector and with required network media connector.  
screwdriver, install two  
(2) screws (included  
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2. Connect transceiver male AUI connector to the female AUI  
connector on LANMaster T8.  
with packing material)  
through mounting  
bracket securely into  
LANMaster T8 chassis.  
3
3. Referring to transceiver documentation, connect transceiver  
network media connector to the network media.  
4. Carefully install  
mounting  
bracket, with  
attached  
TO FIBER, COAX,  
OR TWISTED PAIR  
LANMaster T8 chassis, to installed mounting screws,  
aligning mounting bracket so that mounting screws  
are secured at narrow end of bracket mounting  
 
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Installing Thinnet 10BASE-2 Cable  
Installing Network Cable  
The LANMaster T8 has a female BNC MDI connector installed at the  
back for connection to 10BASE-2 cable and comes with a mating T-  
connector and a 50-ohm segment terminator for making the cable  
connection.  
10BASE-T Requirements  
STRAIGHT-THROUGH/CROSSOVER CABLE/CONNECTOR  
NOTE: The 10BASE-T cable and RJ-45 jacks for hub to terminal device  
connections must be configured as straight through. The 10BASE-T  
cable and RJ-45 jacks for hub to hub connections must be configured  
as crossover.  
To connect to 10BASE-2 network cable:  
1. Locate or build IEEE 802.3 compliant 10BASE-2 cable with  
male BNC connectors installed at both ends.  
The “Xport provided on the LANMaster T8 changes a physical  
straight through cable configuration to a logical crossover cable  
configuration for hub to hub connections.  
2. Install the mating T-connector to the female BNC connector on  
the LANMaster T8.  
Therefore, ensure that all 10BASE-T cable to be installed is straight-  
through:  
3. Install 10BASE-2 cable to one side of the T-connector.  
4. Install 10BASE-2 cable to other side of the T-connector  
OR, if the LANMaster T8 is the last network device in the daisy  
chain, install a 50-ohm terminator.  
1 2 3 4  
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5. Verify that the 10BASE-2 segment coax cable segment is  
terminated properly at both ends.  
RJ-45 PLUG  
8
In a coax thinnet  
50 ohm terminator  
1
RJ-45 JACK  
installation, the first and  
last device in the daisy-  
chain must be  
terminated with a 50  
earth ground  
ohm terminator.  
Additionally, the  
Straight Through Cable  
10BASE-2 segment must  
be grounded to “earth  
ground” at one end.  
at RJ-45 Plug  
Hub . . . . . . . . . . . . . . . .PC, transceiver, NIC, printer  
RJ-45 Male . . . . . . . . . . . . . . .RJ-45 Male  
1 . . . . . . . . . . . . . . . . . . .1  
2
3
. . . . . . . . . . . . . . . . . .2  
. . . . . . . . . . . . . . . . . .3  
The two active pairs in a  
10BASE-T network are pins 1 & 2  
and pins 3 & 6. Use only  
dedicated wire pairs (such as  
blue/white & white/blue,  
orange/white & white/orange) for  
the active pins.  
6 . . . . . . . . . . . . . . . . . . .6  
50 ohm terminator  
 
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NOTE: The IEEE 802.3 standard states that the shield of a coax trunk  
cable shall make electrical contact with an earth reference once and  
only once per segment. Failure to provide an earth ground to a 10BASE-  
2 or 10BASE-5 segment may allow ambient RF energy to couple onto  
the cable shield, resulting in intermittent network failure. More than one  
ground per segment may allow a potential difference between the two  
grounds to cause current to flow, damaging components. And, since  
Ethernet senses collisions on 10BASE-2 and 10BASE-5 cable by  
monitoring the shield voltage level, more than one ground could cause  
false collisions that result in repeater ports partitioning and network  
traffic beyond the partition ceasing.  
Installing Twisted-Pair 10BASE-T Cable  
To connect 10BASE-T Cable to LANMaster T8 RJ-45 connectors:  
1. Locate or build 10BASE-T cables that are:  
802.3 compliant (See page 20.)  
with straight through connector/cable configuration (See  
page 7.)  
with male RJ-45 plug connectors at both ends.  
2. Connect male RJ-45 plug connector at one end of 10BASE-T  
cable to LANMaster T8 RJ-45 jack connector.  
3. Connect male RJ-45 plug connector at other end of 10BASE-T  
cable to DTE terminal RJ-45 jack connector or to RJ-45 jack  
connector on other hub.  
10BASE-2 Requirements  
Thinnet 10BASE-2 cable “daisy-chains” network devices.  
With a maximum segment length of 185 meters and a minimum  
segment length of 0.5 meters, the coaxial cable must have a 50 ohm  
characteristic impedance. Standard BNC connectors and "T's" provide  
access to the media, typically connected directly to the back of network  
interface cards, eliminating the need for an external transceiver.  
wall plate  
NOTE: Hub-to-hub  
LANMaster T8  
Only 30 transceivers can be installed onto a 10BASE-2 Ethernet  
segment, spaced at least 0.5 meters apart. The first and last device in the  
daisy-chain must be terminated with a 50 ohm terminator, grounded to  
“earth ground” at one end.  
X
1
2
3
4
5
6
7
8
connections MUST  
be from any port 1-8  
on one LANMaster  
T8 hub to the X port  
on the other  
10BASE-5 Requirements  
Thicknet 10BASE-5 cable is the original Ethernet.  
LANMaster T8 hub.  
X
1
2
3
4
5
6
7
8
With a maximum segment length of 500 meters and a minimum  
segment length of 1.5 meters,the coaxial cable must have a 50 ohm  
characteristic impedance.  
As many as 100 transceiver can be installed onto a 10BASE-5 Ethernet  
segment, spaced at least 2.5 meters apart. There must be a type N 50  
ohm terminator installed at each end of a thick coaxial cable segment.  
X
1
2
3
4
5
6
7
8
X
1
2
3
4
5
6
7
8
 
8
11  
LA
N
Master™
T
8  
8-Port
E
t
hernet™
R
e
peater Hub  
10-Mb/s Baseband Network Configuration Guidelines  
Ethernet 802.3 specifications define network configuration guidelines for the 10-Mb/s baseband network:  
10BASE-T, 10BASE-2, and 10BASE-5 cable  
segments can be installed as a single Ethernet  
collision domain if the cable segments are  
connected using repeaters.  
When connecting LANMaster T8 repeater hubs,  
the transmission path between any two Data  
Terminating Equipment (DTE) network devices  
can consist of no more than five segments. (A  
segment is the independent network cable  
connection between repeaters or between  
4
4
repeaters and network devices.)  
4
4
4
To verify the network configuration by assigning  
segment numbers to cable connections:  
4
3
4
1. Determine the two terminals in the  
network which are separated by the  
greatest number of segments.  
X
1
2
3
4
5
6
7
8
X
1
2
3
4
5
6
7
8
X
1
2
3
4
5
6
7
8
2. Assign a segment path between the  
terminals by labeling the cable  
3
4
4
3
connected to one of the terminals  
“segment 1” and the segment connected  
to the other terminal “segment n” (n =  
total number of segments 5).  
3. To verify that no segment paths contain  
more than n segments, assign segment  
paths and numbers to all other terminals.  
2
4
X
1
2
3
4
5
6
7
8
X
1
2
3
4
5
6
7
8
4. Verify than no more than three of the  
segments are 10BASE-2 or 10BASE-5  
with multiple stations attached.  
1
5
 
10  
9
LA
N
Master™
T
8  
8-Port
E
t
hernet™
R
e
peater Hub  

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