Black Box Stackable MiniHub Bedienungsanleitung

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: [email protected]

Stackable MiniHub

Ports 12345678

Stack Enable

LINK/TX

PORTS

PWR

COL

POL/TX

UP LINK

Off

IRB1 IRB2 On

PWR

12VDC, 1A

JUNE 2001

LE2801A

LE2801AE

LE2801A-BNC

LE2801AE-BNC

LE2801A-FO

LE2801AE-FO

FEDERAL COMMUNICATIONS COMMISSION

AND INDUSTRY CANADA

RADIO FREQUENCY INTERFERENCE STATEMENT

Class B Digital Device. This equipment has been tested and found to comply with the

limits for a Class B computing device pursuant to Part 15 of the FCC Rules. These

limits are designed to provide reasonable protection against harmful interference

in a residential installation. However, there is no guarantee that interference will not

occur in a particular installation. This equipment generates, uses, and can radiate

radio frequency energy, and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio communications. If this

equipment does cause harmful interference to radio or telephone reception, which

can be determined by turning the equipment off and on, the user is encouraged to

try to correct the interference by one of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that

to which the receiver is connected.

• Consult an experienced radio/TV technician for help.

Caution:

Changes or modifications not expressly approved by the party

responsible for compliance could void the user’s authority to operate the

equipment.

To meet FCC requirements, shielded cables and power cords are required to

connect this device to a personal computer or other Class B certified device.

This digital apparatus does not exceed the Class B limits for radio noise emission from

digital apparatus set out in the Radio Interference Regulation of Industry Canada.

Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites

applicables aux appareils numériques de classe B prescrites dans le Règlement sur le brouillage

radioélectrique publié par Industrie Canada.

FCC AND IC STATEMENTS

STACKABLE MINIHUB

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 parato 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.

NOM STATEMENT, TRADEMARKS

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.

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 equio 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.

TRADEMARKS USED IN THIS MANUAL

Velcro®is a registered trademark of Velcro USA.

Any other trademarks mentioned in this manual are acknowledged to be the property

of the trademark owners.

STACKABLE MINIHUB

Contents

Chapter Page

1. Specifications ............................................................................................... 1

2. Introduction ................................................................................................. 3

2.1 General Overview .................................................................................. 3

2.2 Features and Benefits ........................................................................... 5

2.3 Applications ........................................................................................... 7

3. Installation .................................................................................................... 9

3.1 Before You Install: The Complete Package ......................................... 9

3.2 The Installation Procedure .................................................................. 9

3.3 Stacking the MiniHubs .........................................................................12

3.4 Cascading ............................................................................................ 16

3.5 BNC Connection (LE2801A-BNC, LE2801AE-BNC only) .................17

3.6 Fiberoptic Connection (LE2801A-FO, LE2801AE-FO only)..............17

4. Operation ................................................................................................... 19

4.1 LED Indicators .................................................................................... 19

4.2 Operating Features ............................................................................. 19

5. Troubleshooting ........................................................................................ 20

5.1 Things to Check .................................................................................. 20

5.2 Calling Black Box ................................................................................ 21

5.3 Shipping and Packaging ..................................................................... 21

CHAPTER 1: Specifications

Compliance — FCC Part 15 Class A and B, IC Class/classe B,

VDE Class B

Standard — IEEE 802.3 Ethernet v. 1.0/2.0

Interface — LE2801A, LE2801AE: 10BASE-T; LE2801A-BNC,

LE2801AE-BNC: 10BASE2; LE2801A-FO,

LE2801AE-FO: 10BASE-FL

Data Rate — 10 Mbps

Partitioning — Automatic after 32 consecutive collisions

Reconnection — Occurs after 512 bits of error-free transmission

Maximum

Segment Length — UTP (unshielded 10BASE-T): 100 m (328 ft.);

STP (shielded 10BASE-T): 150 m (492 ft.);

AUI drop cable: 50 m (164 ft,);

10BASE2 ThinNet (BNC): 185 m (607 ft.);

10BASE5: 500 m (1,640 ft.);

10BASE-FL multi-mode fiberoptic: 2 km (6562 ft.)

User Controls — Rear-mounted slide switch for straight-through vs.

crossover (uplink) operation on port 8

Stackable switch to specify which hub is at the base

of the stack

Indicators — (19) Front-mounted recessed LEDs:

(1) Power; (9) Link/TX (1 for each port);

(9) Pol/RX

(1 for each port)

1. Specifications

STACKABLE MINIHUB

Connectors — LE2801A, LE2801AE: (8) front-mounted shielded-

type RJ-45 female; (1) rear-mounted DB15 female

AUI port; LE2801A-BNC, LE2801AE-BNC: same

as LE2801A, plus (1) rear-mounted BNC with

internal termination switch; LE2801A-FO,

LE2801AE-FO: same as LE2801A, plus one rear

fiber ST connector

Leads/Signals

Supported — Pins 1, 2, 3, and 6

Enclosure — High-strength steel

Cooling Method — Convection

Operating

Temperature — 32 to 122˚ F (0 to 50˚ C)

Storage

Temperature — –4 to 140˚ F (–20 to 60˚ C)

Humidity — 10 to 95% noncondensing

Power — From wallmount power supply:

LE2801A, LE2801A-BNC, LE2801A-FO:

Input: 120 VAC, 60 Hz;

LE2801AE, LE2801AE-BNC, LE2801AE-FO:

Input: 230 VAC, 50 Hz;

All models: Output: 12 VDC, 1 amp;

All models: Consumption: 10 watts maximum

Size — 0.8"H x 5"W x 4.4"D (1.9 x 12.7 x 11.2 cm)

Weight — Net: 1.3 lb. (0.6 kg);

Net plus power supply: 2.3 lb. (1.05 kg)

CHAPTER 2: Introduction

2.1 General Overview

The Stackable MiniHub is a workplace hub in a very compact package.

It is simple to install and use in an office or lab environment, requiring no

special rack cabinets or wiring-closet apparatus. It is a standard physical-layer

Ethernet product and operates independently of all software.

Stackable MiniHubs provide a simple and inexpensive solution for

networking a personal multi-system office using 10BASE-T twisted-pair

cabling. They can expand from an eight-port hub up to 40 ports.

Six models are available:

• LE2801A, LE2801AE: Basic model, has eight shielded twisted-pair ports

in the front and an AUI port in the rear. LE2801A has a 120-VAC power

supply, LE2801AE has a 230-VAC power supply.

• LE2801A-BNC, LE2801AE-BNC: Same as LE2801A, but has one

additional BNC port in the rear.

• LE2801A-FO, LE2801AE-FO: Same as LE2801A, but has one additional

fiber-ST port in the rear.

Stackable MiniHubs are also well suited for small-to-medium-size office or

lab environments (two to 40 users) that need an independent Ethernet

network. They operate as self-sufficient units to provide 10BASE-T Ethernet

connectivity for local users and devices. Small independent networks built

using the Stackable MiniHubs are easily expanded by taking advantage of the

MiniHubs’ stacking ability.

The small size of the Stackable MiniHubs make them very useful for

demonstration situations in conference rooms and in exhibitions where a

temporary or expansion network is needed. The MiniHubs are also handy as a

piece of test equipment that can be easily inserted into the network to provide

a test port, and then removed after the testing is done. They take up minimal

space and use minimal power, and are rugged enough to be carried in a coat

pocket for emergencies.

Stackable MiniHubs fit easily into the workplace environment. They can

be table-top- or shelf-mounted, or you can use the included Velcro®strip to

mount MiniHubs on walls or on the back or side of a desk or cabinet. All of

the wiring connectors are in the same plane so that wiring space is neat and

minimal. The external power supply conveniently plugs into any available AC

wall receptacle or power strip.

2. Introduction

STACKABLE MINIHUB

The Stackable MiniHub’s RJ-45 ports support connection of up to eight

workstations or other network devices over full-length 10BASE-T cable

segments. Stackable MiniHubs fully comply with the IEEE 802.3 specification

for repeater functionality: They perform signal amplification, retiming of data

packets, and regeneration of preamble bits for each packet received. They will

also detect collisions, extend collision fragments, and automatically partition

and reconnect individual ports in order to keep problems on one segment

from causing downtime elsewhere on the network.

Stackable MiniHubs have LINK and RX LEDs for each front-panel RJ-45

port, located above the corresponding ports (see the illustration below); one

LED to the left of the LINK LED for (and located above) the rear-panel AUI

port, and one LED for AC power, located at the rear above the external

power-supply connection. This makes observing the operation and status

of the ports easy.

Figure 2-1. Front Panel of the Stackable MiniHub.

The included external wallmount power supply uses AC input power of

120 VAC/60 Hz (A models) or 230 VAC/50 Hz (AE models). Its lightweight

cord carries DC power to the barrel-type power jack on the rear panel (shown

in Figure 2-2) of the MiniHub.

CHAPTER 2: Introduction

Figure 2-2. Rear Panel of the Stackable MiniHub.

2.2 Features and Benefits

•Interconnectability with Existing Ethernet Networks

Your Stackable MiniHub has a manual Up-Link switch that you can use to

cross the pinning of its 8th port. In this setting, you can connect 10BASE-

T cable from an existing Ethernet environment (such as the central hub

for the building) to the MiniHub’s 8th port.

•Interoperability with Other Ethernet Devices

Stackable MiniHubs are completely interoperable with other Ethernet-

compliant network devices. Each is fully compliant with IEEE 802.3

specifications for 10-Mbps CSMA/CD operation. This allows Stackable

MiniHubs to be integrated into any standard Ethernet network.

•Installation Versatility

You can easily install Stackable MiniHubs in almost any office or lab

location. The tiny package is very unobtrusive and is typically mounted

with Velcro.

•Robust Network Operation

Stackable MiniHubs use the “star” network topology and have automatic

per-port partitioning and reconnection. A fault on one segment is isolated

from the rest of the network, avoiding most network downtime.

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