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Copyright 2002. Black Box Corporation. All rights reserved.
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746
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February 2002
LE8003A-R2
4-Port BNC Repeater
Installation and User Guide
CUSTOMER
SUPPORT
INFORMATION
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: info@blackbox.com
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BLACK BOX
4-Port BNC Repeater Installation and User Guide
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Black Box
4-Port BNC Repeater
Installation and User Guide
Trademarks
Ethernet is a trademark of Xerox Corporation
UL is a registered trademark of Underwriters Laboratories
All applied-for and registered trademarks are the property of their respective owners.
Important: Black Box’ 4-Port BNC Repeaters contain no user serviceable parts.
Attempted service by unauthorized personnel shall render any and all warranties
null and void. If problems are experienced with a Black Box 4-Port BNC
Repeater, consult Section 5, Troubleshooting, of this User Guide.
2002 Black Box Corporation
84-00071 REV.B
__________________________________________________________________
Contacting Black Box Corporat ion
Please use the mailing address, phone and fax numbers, and Internet address listed below.
Black Box Corporation
1000 Park Drive
Lawrence, PA 15055
Phone (724) 746-5500
Fax (724) 746-0746
email: info@blackbox.com
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FEDERAL COMMUNICATIONS COMMISSION
AND
CANADIAN DEPARTMENT OF COMMUNICATIONS
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency energy and if not
installed and used properly, that is, in strict accordance with the manufacturer’s
instructions, may cause interference to radio communication. It has been tested
and found to comply with the limits for a Class A computing device in accordance
with the specifications in Subpart B of Part 15 of FCC rules, which are designed to
provide reasonable protection against such interference when the equipment is
operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct the
interference.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission
from digital apparatus set out in the Radio Interference Regulation of the Canadian
Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les
limites applicables aux appareils numériques de la classe A prescrites dans le
Règlement sur le brouillage radioélectrique publié par le ministère des
Communications du Canada.
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Normas Oficiales Mexicanas (NOM)
Electrical Safety Statement
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de
que el aparato eléctrico sea operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que
sean recomendados por el fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio
deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no
interfiera su uso. La colocación del aparato eléctrico sobre una cama, sofá,
alfombra o superficie similar puede bloquea la ventilación, no se debe
colocar en libreros o gabinetes que impidan el flujo de aire por los orificios
de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del
tipo descrito en el instructivo de operación, o como se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la
polarización del equipo no sea eliminada.
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13. Los cables de la fuente de poder deben ser guiados de tal manera que no
sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen del
aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las
lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
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TABLE OF CONTENTS PAGE
1.0 SPECIFICATIONS............................................................................................1
1.1 Technical Specifications......................................................................................... 1
1.2 Ordering Information.............................................................................................. 2
2.0 INTRODUCTION............................................................................................. 3
2.1 Inspecting the Package and Product....................................................................... 3
2.2 Product Description............................................................................................... 3
2.2.1 4-Port BNC Repeater Chassis..................................................................... 4
2.3 Features and Benefits.............................................................................................. 5
2.4 Applications............................................................................................................ 6
3.0 INSTALLATION.............................................................................................. 7
3.1 Locating the 4-Port BNC Repeater......................................................................... 7
3.1.1 Table-Top / Shelf Mounting....................................................................... 7
3.2 Connecting Ethernet Media.................................................................................... 7
3.2.1 Connecting ThinNet 10BASE2 (BNC)...................................................... 8
3.2.2 Connecting ThickNet 10BASE5 (AUI) ..................................................... 8
3.2.3 Connecting Mini-transceivers to the AUI port............................................ 8
4.0 OPERATION.....................................................................................................9
4.1 Repeater Functionality............................................................................................ 9
4.2 Powering the 4-Port BNC Repeater........................................................................ 9
4.3 LEDs..................................................................................................................... 10
4.4 Manual Termination Switch ................................................................................ 10
5.0 TROUBLESHOOTING .................................................................................. 11
5.1 Before Calling for Assistance............................................................................... 11
5.2 When Calling for Assistance................................................................................ 11
5.3 Shipping and Packaging Information.................................................................... 11
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1.0 SPECIFICATIONS
1.1 Technical Specifications
Performance
Data Rate: 10 Mbits / sec
Partitioning: Enforced after 32 consecutive collisions.
Reconnect: Occurs after 512 bits of error-free transmission.
Network Standards
Ethernet V 1.0/V2.0 IEEE 802.3: 10BASE2
, 10BASE5
(The 4-Port BNC Repeater is a physical layer standard Ethernet
product, and operates independently of all software)
Maximum Ethernet Segment Lengths
10BASE2 ThinNet (BNC) - 185 m (607 ft), less if heavily tapped
10BASE5 ThickNet drop-cable - 50 m (164 ft)
Connectors (or ports) for 10Mb Ethernet media
4-Port BNC Repeater : For Ethernet media attachment, there are 4 BNC
connectors (no BNC terminators or taps are included) and one AUI (DB15
female with slide lock) connector.
Operating Environment :
Ambient Temperature: 32° to 120° F (0° to 50°C)
Storage Temperature: -5° to 140°F (-20°to 60°C)
Ambient Relative Humidity: 10% to 95% (non-condensing)
Packaging Specifications of the 4-Port BNC Repeater :
Enclosure: High strength steel.
Suitable for wiring closet shelf or desktop mounting.
Dimensions: 9.0 in D x 11.0 in. W x 2.0 in. H
( 23 cm x 28 cm x 5 cm)
Weight: 6 lb. shipping weight ( 2.7 Kg)
Cooling method: Convection
4-Port BNC Re pe ater Power Supply (Internal) :
AC Power Connector: IEC-type, male recessed, rear of chassis
Input Voltage: 90 to 260 vac (auto-ranging)
Input Frequency: 47 t o 63 Hz (auto-ra nging)
Power Consumption: 30 watts max. for the 4-Port BNC Repeater unit
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LED Indicators on Chassis
PWR - Power, Green LED, steady ON indicates there is AC power applied
to the unit.
JAM - Jam, Amber LED, illuminates when jam or jabber condition (illegal
packet size) is detected on any port; affected port is partitioned
temporarily until jabber stops.
ACT - Activit y LED, flashes to indicate there is packet traffic in t he unit.
LED Indicators per port
REC- Receive, Green LED, b links to indicate network activity, data
being received from the port.
COL - Collision, Yellow LED, flashes when a collision is detected
on the port.
PAR - Partition, steady on indicates the port has been partitioned in order
to isolate it (and a fault connected to it) from the rest of the repeater
ports. The other ports should continue to function normally.
MAN PAR - Manual Partition, steady on indicates the port has been manually
partitioned using the adjacent pushbutton switch. This is typically
done as an aid to troubleshooting the BNC cable and connections
attached to the port .
Agency Approvals
UL Listed (UL 1950), cUL, CE, emissions meets FCC Part 15 Class A
115v 60 Hz Power Supply: UL Listed, CSA certified
230v 50 Hz Power Supply: UL Listed, CSA certified, GS approved
1.2 Ordering Information
4-Port BNC Repeater
LE8003A-R2 4-Port BNC Repeater, plus an AUI
connector for backbone connections,
compliant to Ethernet IEEE 802.3,
10BASE2, and 10BASE5 standards.
Auto-ranging internal power supply.
(Note: A “tee” connector is normally required for each BNC port)
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2.0 INTRODUCTION
2.1 Inspecting the Package and Product
Examine the shipping container for obvious damage prior to installing this
product; notify the carrier of any damage which you believe occurred during shipment or
delivery. Inspect the contents of this package for any signs of damage and ensure that the
items listed below are included.
This package should contain:
1 4-Port BNC Repeater
1 AC Power Cord (use with U.S. and other 115 VAC only)
1 Installation and User Guide (this manual)
Remove the items from the shipping container. Be sure to keep the shipping
container should you need to ship the unit at a later date.
In the event there are items missing or damaged, cont act the party from whom you
purchased the product. If the unit needs to be returned, please use the original shipping
container if possible. Refer to Section 5, Troubleshooting, for specific return procedures.
2.2 Product Description
The 4-Port BNC Repeater can expand a 10Mb Ethernet network by
interconnecting up to four individual Ethernet BNC segments, i.e., it operates as a BNC
“hub”. In addition, an AUI port provides a connection for other media types, such as an
AUI drop-cable or another media (such as RJ-45 twisted pair of Fiber) via an appropriate
mini-transceiver attached to the AUI port.
Each 4-Port BNC Repeater unit is a complete operational unit with internal autoranging (for world-wide use) power supply. It is enclosed in a compact, rugged metal
enclosure. The media connecto r s and the status LEDs are all conveniently accessed from the
front. It is easily installed and is suitable for wiring closet shelf or desktop mounting.
The 4-Port BNC Repeater provides full repeater functionality per IEEE 802.3
specifications and is compliant with Ethernet V1.0/2.0 standards.
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2.2.1 4-Port BNC Repeater Chassis
The 4-Port BNC Repeater functions as a BNC “hub” repeater. Its chassis houses
the main repeater circuit board, the port connectors and status LEDs, and the power supply.
The BNC ports are used for attaching on e Ethernet BNC (or ThinNet) segment each, and
provide full IEEE 802.3 repeater functionality supporting a full length segment. The AUI
port is used for attaching an AUI drop-cable to a ThickNet backbone, or for a minitransceiver to enable conn ect ing other media types
Figure 2.2.1: 4-Port BNC Repeater
(Front and Rear Views )
All LEDs for the 4-Port BNC Repeater
unit are front-mounted for easy visual monitoring. The AC power cord port is in the rear.
The internal power supply is auto-ranging to handle any AC power type
worldwide. Power input may range from 90 to 260 vac, with a frequency rating of 47 to 63
Hz. The unit is equipped with a rear mounted IEC-type recessed male AC power connector.
(When shipped for use in areas other than 115 vac, a power cord will not be included). The
unit is convection-cooled for silent operation.
The 4-Port BNC Repeater base unit features Power (PWR), Jabber (JAM) and
ACT (Activity) LED status indicators located in the front of the unit. These common LEDs
provide a visual assessment of the operational condition and aggregate network activity at
the unit, and are in ad dition to the LEDs on each individual BNC port.
Each BNC port requires a “tee” connecto r, an d has Receive, Collision, Partition
and Manual Partition LEDs. The “partition” function (see “Specifications” for details) is
the standard for Ethernet repeaters, i.e. it indicates the port has been partitioned (separated
and no longer connected to the rest of the ports) in order to isolate a fault. Usually, the fault
is somewhere in the attached BNC cable and its tap or connections. A BNC port that is not
properly terminated will also be partitioned.
The “Manual Partition” pushbutton switch on each BNC port provides a way to
separate or segment a BNC port in order to run network tests or to make repairs on the
attached BNC cable and connections. The manual partition over-rides the auto-partition.
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2.3 Features and Benefits
Standards Compliant, for use in 10Mb Ethernet ne tworks
The 4-Port BNC Repeater complies with IEEE802,3 10BASE2 and
10BASE5 standards. Users may expand network distances while retaining
the ability to add users via BNC taps.
Front-mounted ports and status LEDs
Cable connections and status LEDs are all located on the front of the unit for
easy installation and for visual monitoring of operational status over time.
Rugged chassis, withstands the strain of heavy cables
The heavy-duty unit has a metal case. The weight of the unit enables it to be
stable. Even when several bulky BNC cables are attached, it will not tip
over. Rubber feet on the bottom grip the mounting surface without
scratching it for added stability.
Manual Partition switch on each BNC port
The 4-Port BNC Repeater features a pushbutton switch on each BNC port
that enables that port to be isolated. This simplifies installation and repairs.
. When a port is manually partitioned, devices and connections attached
to it may be tested or serviced without the risk of interfering with the
operation of the other ports. Especially for BNC networks where any faulty
connection will bring down the network, this is useful in order to be certain
proper connections have been made before restoring the BNC connection to
the Repeater unit. The manual partition function is similar to but additional
to the auto-partition function that is built in as part of the electronics of the
unit. An LED indicates when the manual partition is enabled.
When BNC networks are expanded and segments need to be
extended or changed, the 4-Port BNC Repeater product is ideal.
World-wide appli c ations
An internal universal power supply allows the 4-Port BNC Repeater to be
used throughout the world.
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2.4 Applications
The 4-Port BNC Repeaters are generally used to extend or interconnect BNC
Ethernet segments. In addition, an AUI port enables a ThickNet backbone or another media
connection via a mini-transceiver. (The BNC taps and terminators, as well as the minitransceivers illustrated below are not supplied with the unit, may be purchased separately).
As many as four repeaters may be connected in series to connect users at the extremities of
5X the standard segment distance while still adhering to the Ethernet "four repeater" rule.
Figure 2.4.1: 4-Port BNC Repeaters combine and extend segments of 10BASE2
networks, and have an AUI port for different media and backbone connections.
The internal auto-ranging power supply of the 4-Port BNC Repeater permits it to
be installed anywhere in the world. In th e workplace or in a wiring closet, the 4-Port BNC
Repeater unit may be conveniently shelf or table-top mounted and plugged into a standard
AC power convenience outlet for a simple installation. For rack-mounting, the 4-Port BNC
Repeater can easily sit on a rack-shelf in a 2U vertical space.
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Fiber Transceiver
TP Transceiver
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3.0 INSTALLATION
This Section discusses location and installation of the 4-Port BNC Repeater.
3.1 Locating the 4-Port BNC Repeater
The location of the 4-Port BNC Repeater is dependent on the physical layout of
the network and the area to be served. The unit should be set-up in a location that will
accommodate easy and equal access to planned network devices and/or segment
connections.
Locate an AC receptacle that is within six feet (2 meters) of the intended 4-Port
BNC Repeater site. The rugged steel case of the 4-Port BNC Repeater will protect it from
accidental damage in a wiring closet or in a workplace setting. Keep an open area around
the unit so that convection cooling can occur while the unit is in operation.
3.1.1 4-Port BNC Repeater Table-Top / Shelf Mounting
The 4-Port BNC Repeater unit has four rubber feet to provide stability while not
scratching finished surfaces. It is typically shelf-mounted, either in a wiring closet or in an
open area. To conserve shelf space, it may be desirable to mount several units on top of
each other. If so, this may be readily done as the 4-Port BNC Repeater steel case is strong.
3.2 Connecting Ethernet Media
The 4-Port BNC Repeater is specifically designed to support connections for up
to four BNC segments. (Note that a fifth BNC segment may optionally be attached using the
AUI port and a BNC mini-transceiver). The AUI port normally provides for attachment of
an AUI drop-cable.
The media types supported along with the corresponding IEEE 802.3 standards
and connector types are as follows:
Media IEEE Standard
Connector
ThinNet 10BASE2 BNC
ThickNet 10BASE5 AUI (female)
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3.2.1 Connecting ThinNet 10BASE2 (BNC)
Connect a ThinNet coax cable to a BNC connector on the fron t of the unit in the
same manner as is done for any standard BNC connection. Use a “tee” connector on each
active port, and also use a “terminat or” if the connection is at the end of the BNC cable.
The 4-port BNC Repeater does not have internal termination.
3.2.2 Connecting ThickNet 10BASE5 (AUI)
Using the steps below as a guid e, attach a new or existing 10B ASE 5 ThickNet drop-
cable directly to the AUI connector on the AUI port.
1. Plug the male end of the cable into the female AUI connector on the unit.
2. Engage the AUI connector slide lock to insure maximum connectivity.
3. Connect the opposite end of the cable into a network AUI port. (This
could be a network backbone transceiver, a hub or fan-out with an AUI
backbone port, or an AUI module in a concentrator.)
The AUI port may also used for connecting to other Ethernet devices using standard
AUI cabling. In this type of situation, it is important to consider the AUI segment length to
the attached device, including any cascading.
3.2.3 Connecting Mini-transceivers to the AUI port
Using the illustration below as a guide, attach a mini-transceiver to the AUI port.
This will enable the AUI port to be converted to another media (such as twisted pair RJ-45,
or fiber, or a fifth BNC port). The 4-port BNC Repeater will supply power to the minitransceiver per Ethernet specifications.
Figure3.2.3 : Installing a Fiber or a TP Mini-transceiver on the AUI port
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Fiber Transceiver
TP Transceiver
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4.0 OPERATION
This section describes the functionality and operation of the 4-Port BNC
Repeater.
4.1 Repeater Functionality
The 4-Port BNC Repeater operates as a “BNC hub”. It is compliant with IEEE
802.3 specifications and supports all applicable IEEE media. The following describes the
basic functionality of the 4-Port BNC Repeaters.
1. Repeater Functi ons: Each port operates in conjunction with the controller
functions of the 4-Port BNC Repeater base unit, functioning together as a fully
compliant Ethernet repeater. Each 4-Port BNC Repeater unit counts as a single
repeater in network topology design..
2. Collisions: When a collision is detected at a port other than the original
receiving port, it generates a jam pattern to the other ports. When a collision
signal is detected at a receiving port, it generates a jam pattern to th e other port.
The sequence of jam signals depends on the sequence and location of collisions.
3. Partitioning and Re-connection: A 4-Port BNC Repeater will automatically
disconnect (partition) any segment (port) when 64 consecutive collisions occur or
after 6.5 ms of continuous transmissions. Network integrity is checked every 800
ms and segment (port) reconnection occurs after a 512-bit packet is transmitted
without error.
The Manual Partition function (MAN PAR PUSHBUTTON SWITCH)
over-rides standard partitioning and re-connection logic. See “Features and
Benefits” and Section 4.4 for discussions and explanations on this topic.
4.2 Powering the 4-Port BNC Repeater
The 4-Port BNC Repeater incorporates an internal universal power supply, and
has a recessed male IEC connector for the AC power cord at the right-rear. A six foot
power cord is supplied with each unit; it works with 115vac power outlets only.
The 4-Port BNC Repeater’s auto-ranging power supply supports installation
environments where the AC voltage is from 90 to 260 volts with a power input frequency
between 47 and 63 Hz, and will consume no more than a maximum of 20 watts. The power
connector is located on the back of the unit. In order to power down the unit, simply
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unplug the power cable from either the wall socket, power strip or the power connector on
the back of the unit.
When connecting various Ethernet media, there is no need to power down the
unit. Individual segments of any media type can be connected or disconnected from ports
without concern for AC power-related problems or damage to the unit.
4.3 LEDs
The 4-Port BNC Repeater is equip ped with three common LEDs located on the
front of the chassis unit. These LEDs indi cat e Power (PWR), Jam (JAM), and Activity
(ACT). Each port has Receive(REC), Collision (COL) Partition (PAR) and Manual
Partition (MAN PAR) LEDs. The LEDs are used to provide visual indication about the
operational condition and traffic activity of the unit and its associated ports. See
Specifications for definition of each LED.
4.4 BNC Port Manual Termination Switch
The 4-Port BNC Repeater features a pushbutton switch on each BNC port that
enables that port to be isolated. This simplifies installation and repairs.
When a port is manually partitioned, devices and connections attached to it may
be tested or serviced without the risk of interfering with the operation of the other ports.
Especially for BNC networks where any
faulty connection will bring down the
network, this is useful in order to be
certain proper connections have been
made before restoring the BNC port
connection to the 4 Port BNC Repeater
unit. The manual partition function is similar to but additional to the auto-partition function
that is built in as part of the electronics of the unit.
An adjacent LED (labeled “MAN PAR”) illuminates to indicate when the manual
partition is enabled.
When BNC networks are expanded and segments need to be extended or changed,
the 4-Port BNC Repeater product is ideal.
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5.0 TROUBLESHOOTING
If problems should develop during installation or operation, follow the
suggestions below prior to calling Technical Support for help. If you are unsure of
any procedure described in this chapter, or if the 4-port BNC Repeater is not
operating as expected, do not attempt to repair or alter the unit. Contact Black Box
for assistance.
5.1 Before Calling for Assistance
1. If you have difficulty installing or operating the 4-port BNC Repeater, refer to
Chapters 3 and 4. Make sure the other components of the network are working.
2. Check the cables and con nectors to make sure that they have been pr operly
connected and have not been crimped or in some way impaired during installation.
3. Check that the AC power cord is p l ugged into a functioning electrical outlet.
Make sure that the AC power cord is properly plugged into the 4-port BNC Repeater. Use
the PWR LED to verify that the unit is receiving proper power.
4. If the problem is isolated to a network device other than the 4-port BNC
Repeater, replace the probl em devi ce with a known good device. Verify whether or not the
problem is corrected. If it is not, go to step 5. If the problem is correct ed, the 4-port BNC
Repeater and its associated cables are OK.
5. If the problem still exists, contact Black Box.
5.2 When Calling for Assistance
If you determine that your 4-port BNC Repeater is malfunctioning, do not attempt to
alter or repair the unit. It co ntains no user-serviceable parts. Co ntact Black Box.
Before you do, make a record of the history of the problem. Black Box will be able to
provide more efficient and accurate assistance with a complete description, including:
• the nature and duration of the problem.
• when the problem occurs.
• the components involved in the problem.
• any particular application that, when used, appears t o create the problem
or make it worse.
5.3 Shipping and Packaging Information
If you need to transport or ship your 4-port BNC Repeater:
• Package it carefully. We recommend that you use the original container.
• If you are shipping the 4-port BNC Repeater for repair, make sure you include
everything that was in the original package. Before you ship it, contact Black
Box to get a Return Materials Authorization (RMA) number.
Mark the RMA number on the package and ship it to:
Black Box Corporation
1000 Park Drive
Lawrence, PA 15055
Phone: (724) 746-5500
Fax: (724) 746-0746
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BLACK BOX
4-Port BNC Repeater Installation and User Guide
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