(E-TBT-HB-0804)
33022.B
For assistance in installing, using, or
maintaining the TRANSITION Networks
LANMaster T8 8-Port Ethernet™
Repeater Hub, contact TRANSITION
Networks Technical Support
at:
(800) 260-1312
or contact your local distributor.
LANMaster™ T8
8-Port Ethernet™ Hub
LANMASTER T8 8-PORT HUB
SPECIFICATIONS
Standards
IEEE 802.3
Physical
Dimensions
137 mm x 137 mm x 25 mm
Power
Power Supply Adapter
AC Input (47-63 hertz):
PN
Requirement Location
3532 120 volts, 60 hertz, 28 watts USA/Canada/Mexico
3535 230 volts, 50 hertz, 28 watts Europe
3534 100 volts, 50-60 hertz, 28 watts Japan
3533 240 volts, 50 hertz, 28 watts United Kingdom
3536 240 volts, 50 hertz, 28 watts Australia
DC Output:
12 volts at 800 mA maximum.
Environment
Temperature: 0-50°C (32° to 122° F )
Humidity 10-90%, non condensing
Altitude 0-10,000 feet
Warranty
Lifetime
21
20
CAUTION: RJ connectors are NOT INTENDED FOR
CONNECTION TO THE PUBLIC TELEPHONE
NETWORK. Failure to observe this caution could result
in damage to the public telephone network.
Compliance Information
UL Listed
C-UL Listed (Canada)
CISPR/EN55022 Class A
FCC Regulations
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 to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user
will be required to correct the interference at the user’s own expense.
Canadian Regulations
This digital apparatus does not exceed the Class A limits for radio noise for
digital apparatus set out on the radio interference regulations of the Canadian
Department of Communications.
European Regulations
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.
Copyright Restrictions
© 1997 TRANSITION Networks.
All rights reserved. No part of this work may be reproduced or used in any
form or by any means – graphic, electronic, or mechanical – without written
permission from TRANSITION Networks.
Trademark Notice
All registered trademarks and trademarks are the property of their respective
owners.
Der Anschluss dieses Gerätes an ein öffentlickes
Telekommunikationsnetz in den EG-Mitgliedstaaten verstösst gegen die
jeweligen einzelstaatlichen Gesetze zur Anwendung der Richtlinie
91/263/EWG zur Angleichung der Rechtsvorschriften der
Mitgliedstaaten über Telekommunikationsendeinrichtungen
einschliesslich der gegenseitigen Anerkennung ihrer Konformität.
10BASE-2 Cable Specifications
The physical characteristics of the 10BASE-2 cable must meet or exceed IEEE 802.3
10BASE-2 specifications.
Cable Characteristics:
Cable type: Stranded Coaxial RG58 (ThinNet)
Impedance: 50 Ω @ 10 MHz
Mutual Capacitance: 24 pF/ft ±20% @ 10 MHz
Maximum Cable Length
: 185 meters (610 feet)
Maximum number network connections:30
Minimum distance between connections: 0.5 meters (1.6 feet)
Terminate 10BASE-2 cable at one end using a 50 ohm terminator and at the
other end using a 50 ohm terminator grounded to earth ground.
10BASE-T Cable and Connector Specifications
The physical characteristics of the 10BASE-T cable must meet or exceed IEEE
802.3 10BASE-T specifications.
10BASE-T Cable Characteristics:
Category 3 wire or better is required; category 5 wire is recommended. Either
shielded twisted pair (STP) or unshielded twisted pair (UTP) can be used. DO
NOT USE FLAT OR SILVER SATIN WIRE.
Category 3:
Gauge 24 to 22 AWG
Attenuation 28 dB/1000’ @ 10 MHz
Differential Characteristic Impedance 100 Ω ±10% @ 10 MHz
Category 5:
Gauge 24 to 22 AWG
Attenuation 20 dB/1000’ @ 10 MHz
Differential Characteristic Impedance 100 Ω ±10% @ 10 MHz
Maximum Cable Length: 100 meters (330 feet)
10BASE-T Connector Characteristics:
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. 10BASE-T cable for unlike devices (such as
hub to terminal device) must be configured as straight through; 10BASE-T
cable for like devices (such as hub to hub or terminal device to terminal
device) must be configured as crossover.
Straight Through Cable
Twisted
Pair #1
Twisted
Pair #2
Connectors for unlike devices
1
2
3
6
1
Twisted
Pair #1
2
3
Twisted
Pair #2
6
Connectors for like devices
Crossover Cable
1
2
3
6
1
2
3
6
Table of Contents
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
The LANMaster T8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Networking the LANMaster T8 . . . . . . . . . . . . . . . . . . . . . . .2
Connectors, Switch, Indicators, . . . . . . . . . . . . . . . . . . . . . .3
2 SITE CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 4
3 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
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
4 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Monitoring Power LED . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Monitoring Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
5 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Technical Support Contact . . . . . . . . . . . . . . . . . . . . . . . . .16
WARRANTY STATEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ETHERNET CABLE SPECIFICATIONS. . . . . . . . . . . . . . . . . . 19
LANMASTER T8 8-PORT HUB SPECIFICATIONS . . . . . . . 21
i
19
ETHERNET CABLE SPECIFICATIONS
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. 6 Power Return 11 Logic Ref
2 Collision+ 7 N/C 12 Receive
3 Transmit+ 8 Logic Ref. 13 Power
4 Logic Ref. 9 Collision-- 14 Logic Ref.
5 Receive+ 10Transmit- 15 N/C
10BaseFL Cable and Connector Specifications
The physical characteristics of the 10BaseFL cable must meet or exceed IEEE
802.3 10BaseFL specifications.
10BaseFL Cable Characteristics:
Fiber Optic Cable Recommended: 62.5/125 µm multimode fiber
Optional: 100/140 µm multimode fiber
85/125 µm multimode fiber
50/125 µm multimode fiber
Fiber Optic Transmitter Power: Average power: -15.0 dBm
Peak power:-12.0 dBm ±1dBm
Fiber Optic Receiver Sensitivity: 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)
10BASE-5 Cable and Connector Specifications
The physical characteristics of the 10BASE-5 cable must meet or exceed IEEE
802.3 10BASE-5 specifications.
10BASE-5 Cable Characteristics:
Cable type: RG8 Solid Coaxial (ThickNet)
Impedance: 50 Ω @ 10 MHz
Capacitance: 26pF/ft
Maximum Cable Length: 500 meters (1650 feet)
Maximum number network connections: 100
Minimum distance between connections: 2.5 meters (8.2 feet)
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.
Maximum number of terminal devices on Ethernet network: 1024
18
1
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.
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.
Features:
• Eight fixed RJ-45 twisted-pair connectors at front provide
terminal device connections
• Optional RJ-45 uplink port connector at front eliminates need
for crossover cable between hubs
• 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 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.
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”.
TN’s 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.
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.
If not, and the product is covered by warranty, then:
• 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.
• 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.
• 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.
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:
• 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.
• 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.
X – 1 2 3 4 5 6 7 8
LANMaster T8 Front
1 2 3 4
Act
5 6 7 8
LANMaster T8 Back
Link Status
AUI BNC
2
17
Networking the LANMaster T8
The LANMaster T8
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.
Additionally,
LANMaster T8
hubs can be
cascaded using
twisted-pair
10BASE-T cable
and the X
(crossover) uplink
RJ-45 connector.
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).
Warranty Statement
A. Five Year Warranty
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.
TN’s 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 1.800.LAN.WANS or 612.941.7600
Fax 612.941.2322
E-mail techsupport@transition.com
Internet http://www.transition.com
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 NONINFRINGEMENT, AND ANY WARRANTY BASED UPON PRIOR WRITTEN OR ORAL
REPRESENTATIONS REGARDING SUCH PRODUCTS MADE BY TN, ITS EMPLOYEES,
AGENTS, OR REPRESENTATIVES.
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.
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.
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.
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
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
16
3
Connectors and Indicators
CONNECTORS
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.
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.
LED INDICATORS
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.
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.
NOTE: Failure to observe the above warning will immediately void the
warranty.
Fault Isolation
If two network devices fail to communicate through the LANMaster T8,
consider the following:
• Are the LEDs described in the previous section functioning
properly?
• Do network devices have Link Integrity enabled?
• Do network devices communicate when the LANMaster T8 is
not installed between them?
• 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?
• Is the thinnet cable unbroken and properly connected?
• Are network interface cards properly configured?
Technical Support Contact
For assistance in fault isolation and in maintaining the LANMaster T8,
contact:
Technical Support (800) 260-1312
or your local distributor.
Straight-through RJ-45 Connectors
X – 1 2 3 4 5 6 7 8
Crossover RJ-45 (X) Connector
Power Adapter Connector
LED Indicators
1 2 3 4
Act
5 6 7 8
Link Status
AUI Connector
AUI BNC
BNC Connector
Act
1 2 3 4
5 6 7 8
Link Status
4
15
4. OPERATION
The LANMaster T8 requires no intervention beyond occasionally
monitoring the Power and Status LEDs.
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.
2. SITE CONSIDERATIONS
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.
Additionally:
• The twisted pair cables should not run in the same conduit with
power line cables.
• 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.
And:
• Since the LANMaster T8 is an Ethernet repeater, the entire
installation should comply with the IEEE Ethernet 802.3
specification
1 2 3 4
Act
5 6 7 8
Link Status
AUI BNC
Act
1 2 3 4
5 6 7 8
Link Status
14
5
Powering the LANMaster T8
To power ON the LANMaster T8:
1. Verify that the LANMaster T8 power supply adapter is the
correct one for the site installation.
2. At LANMaster T8 back, locate the power receptacle.
3. Connect the LANMaster T8 power connector end of the
power supply adapter to LANMaster T8 power receptacle.
4. Plug external power connector end (male) of the power
supply adapter into correct voltage AC wall socket.
5. At LANMaster T8 front, verify that Act(ivity) LED is
illuminated.
3. INSTALLATION
To install the LANMaster T8:
• Unpack the LANMaster T8
• Install LANMaster T8 at site
• Install Network Cable
• Power the LANMaster T8.
Direction is provided in the pages that follow.
Unpacking the LANMaster T8
The LANMaster T8 packing contents should include the following:
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
6
13
Installing LANMaster T8 at Site
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.
2. Install four (4) rubber feet (included with packing material):
• Separate rubber feet.
• Remove protective paper from
adhesive surface of rubber foot.
• Position and secure each rubber
foot as shown.
3. Return LANMaster T8 to upright
position.
To install the LANMaster T8 mounting bracket under shelf or on wall:
1. Using mounting bracket as a guide, with
pencil or other marking device, mark screw
installation locations on wall or under shelf.
2. Using Phillips screwdriver, install two (2)
screws (included with packing material) at
installation locations marked on wall or under
shelf.
3. Using Phillips
screwdriver, install two
(2) screws (included
with packing material)
through mounting
bracket securely into
LANMaster T8 chassis.
4. Carefully install
mounting
bracket, with
attached
LANMaster T8 chassis, to installed mounting screws,
aligning mounting bracket so that mounting screws
are secured at narrow end of bracket mounting
Installing Thicknet 10BASE-5 Cable
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.
CONNECTING TO 10BASE-5 USING AUI DROP CABLE
To connect to 10BASE-5 cable using AUI drop cable:
1. Locate or build IEEE 802.3 compliant AUI drop cable.
2. Connect AUI drop cable
male connector to female
AUI (DTE) connector on
LANMaster T8.
3. Connect AUI drop cable
female connector to the AUI
port on a 10BASE-5 cable
transceiver or media
attachment unit (MAU).
4. Verify that 10BASE-5
segment is terminated at both ends using 50-ohm terminators.
CONNECTING TO NETWORK USING TRANSCEIVER
NOTE: Refer to transceiver documentation for detailed specifications.
To connect to network using transceiver:
1. Locate IEEE 802.3 compliant transceiver with male AUI
connector and with required network media connector.
2. Connect transceiver male AUI connector to the female AUI
connector on LANMaster T8.
3. Referring to transceiver documentation, connect transceiver
network media connector to the network media.
TO FIBER, COAX,
OR TWISTED PAIR
50 ohm terminator
2
1
2
X – 1 2 3 4 5 6 7 8
3
12
7
Installing Network Cable
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.
The “X” port provided on the LANMaster T8 changes a physical
straight through cable configuration to a logical crossover cable
configuration for hub to hub connections.
Therefore, ensure that all 10BASE-T cable to be installed is straightthrough:
Straight Through Cable
at RJ-45 Plug
Hub . . . . . . . . . . . . . . . .PC, transceiver, NIC, printer
RJ-45 Male . . . . . . . . . . . . . . .RJ-45 Male
1 . . . . . . . . . . . . . . . . . . .1
2 . . . . . . . . . . . . . . . . . .2
3 . . . . . . . . . . . . . . . . . .3
6 . . . . . . . . . . . . . . . . . . .6
Installing Thinnet 10BASE-2 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 Tconnector and a 50-ohm segment terminator for making the cable
connection.
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.
2. Install the mating T-connector to the female BNC connector on
the LANMaster T8.
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.
5. Verify that the 10BASE-2 segment coax cable segment is
terminated properly at both ends.
In a coax thinnet
installation, the first and
last device in the daisychain must be
terminated with a 50
ohm terminator.
Additionally, the
10BASE-2 segment must
be grounded to “earth
ground” at one end.
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.
18234
5
6
7
RJ-45 PLUG
8
RJ-45 JACK
1
50 ohm terminator
earth ground
50 ohm terminator
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.
8
11
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 10BASE2 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.
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.
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.
10BASE-5 Requirements
Thicknet 10BASE-5 cable is the original Ethernet.
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.
NOTE: Hub-to-hub
LANMaster T8
connections MUST
be from any port 1-8
on one LANMaster
T8 hub to the X port
on the other
LANMaster T8 hub.
wall plate
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
X – 1 2 3 4 5 6 7 8
10
9
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
repeaters and network devices.)
To verify the network configuration by assigning
segment numbers to cable connections:
1. Determine the two terminals in the
network which are separated by the
greatest number of segments.
2. Assign a segment path between the
terminals by labeling the cable
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.
4. Verify than no more than three of the
segments are 10BASE-2 or 10BASE-5
with multiple stations attached.
X – 1 2 3 4 5 6 7 8
4
4
4
3
X – 1 2 3 4 5 6 7 8
4
4
4
4
X – 1 2 3 4 5 6 7 8
2
X – 1 2 3 4 5 6 7 8
1
3
3
4
X – 1 2 3 4 5 6 7 8
5
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