Black Box Stackable MiniHub User manual

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 [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
Stackable MiniHub
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
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

1
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

2
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)

3
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

4
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.

5
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.

•Simple Network Diagnosis and Maintenance with LEDs
Stackable MiniHubs are equipped with a full complement of LEDs to
show the status of basic network activity. LINK LEDs for each port offer
a very simple way to verify operational connections for each 10BASE-T
segment.
•Low-Cost Standalone 10BASE-T Connectivity
Operating your Stackable MiniHub in a standalone environment as a self-
sufficient device is a very low-cost method of providing small workgroups
access to a variety of Ethernet networking services such as file sharing,
email, printer sharing, and other computer information.
•High-Quality Construction
Stackable MiniHubs have rugged steel enclosures and are compliant with
rigid Class B emission standards, making them suitable for commercial
and home offices.
6
STACKABLE MINIHUB

7
CHAPTER 2: Introduction
Figure 2-3. Connecting to an Existing Network.
2.3 Applications
Expanding from one to multiple ports at an existing site is easy, and
requires no modification to typical building wiring. Simply plug the
existing networked device’s network-cable segment into one of the Stackable
MiniHub’s front-mounted RJ-45ports. With the MiniHub’s rear-mounted Up-
Link switch set to “=
x
=”, run 10BASE-T cable from the existing network outlet
to the MiniHub’s 8th port. Then plug the DC power cord of the MiniHub’s
external power supply into the MiniHub’s power jack, plug in the power
supply’s transformer, and there you are: In minutes, you have added eight
new ports for other networked devices (see the illustration below).

8
STACKABLE MINIHUB
Stackable MiniHubs may also be used standalone to network a local multi-user
system, as shown below. Up to 8 RJ-45 user ports are available where only
10BASE-T wiring is used, and full-length Ethernet segments are supported
on all segments. In this application, set the Up-Link switch to the straight-
through or “===” position, so that the MiniHub’s 8th port is a user port, not
an up-link to another hub.
Figure 2-4. Using the Stackable MiniHub as a Standalone Hub.

9
CHAPTER 3: Installation
3.1 Before You Install: Inspecting the Complete Package
Examine the shipping container for obvious damage before installing the
MiniHub; notify the carrier of any damage which you believe occurred during
shipment ar delivery. Inspect the contents of this package for any signs of
damage and make sure that you received these items:
• (1) Stackable MiniHub
• (1) External 120-VAC 60-Hz power supply
• (1) Velcro tape section, approximately 3 inches (7.6 cm) in length
• (2) Brackets for optional screw-mounting
• (1) 2-inch (5.1-cm) ribbon cable (stacking cable)
• (1) Copy of this manual
Remove the Stackable MiniHub from the shipping container. Keep the
container in case you need to ship the unit later.
If any items are missing or damaged, contact Black Box. If you need to
return the unit, see Sections 5.2 and 5.3.
3.2 The Installation Procedure
Installing a Stackable MiniHub is very simple. First, keeping in mind that it
must be within 6 feet (1.8 m) of an AC outlet, decide how and where you’re
going to mount the MiniHub.
3.2.1 M OUNTING THE M INI H UB
Tabletop- or Shelf-Mounting
Stackable MiniHubs are easily mounted on a tabletop or shelf, and have four
rubber feet to provide stability without scratching finished surfaces. A piece of
Velcro may be used to add additional stability if desired. When properly
installed, the top-mounted LED status indicators will be in plain view and easy
to read.
The rugged steel case of the Stackable Hub will protect it from accidental
damage in an office or lab. Keep an open area around the unit so that
convection cooling can occur while the unit is operating.
3. Installation

10
STACKABLE MINIHUB
Wall (or Vertical-Surface) Mounting
The Stackable MiniHub comes with a piece of Velcro mounting tape. You can
use this to mount a Stackable Hub in a vertical position. Stick one side of the
Velcro to the bottom of the hub between the rubber feet. Stick the other side
of the Velcro to the desired vertical mounting location. This permits the
compact Stackable Hub to be mounted on a wall surface, on the side of a
server cabinet, on the back of a desk, or in similar convenient locations in
the workplace where the associated cables are out of the way.
As an alternative to Velcro for vertical-surface mounting, you can use the
included small brackets to mount the MiniHub with screws, as shown below.
You can use the metal screws in each side of the Stackable MiniHub’s case to
attach the brackets. With the brackets, you can mount the MiniHub in almost
any desired position.
3.2.2 P OWERING U P THE H UB
Once you’ve mounted the Stackable MiniHub, plug the included external
power supply’s DC power cord into the matching power jack on the Stackable
MiniHub’s rear panel. Plug the power supply’s transformer into an AC
receptacle that is six feet (2 meters) or less away. The green “PWR” LED
should light up. Now you are ready to begin attaching Ethernet cable
segments.
3.2.3 C ONNECTING T WISTED -P AIR S EGMENTS TO THE F RONT -P ANEL P ORTS
1. Insert the male plug on one end of a standard 10BASE-T cable into one
of the RJ-45 female ports on the front panel of the Stackable MiniHub.
(Even though the MiniHub’s connectors are shielded, they will accept,
and operate properly with, either unshielded or shielded RJ-45 twisted-
pair wiring plugs.)
2. Connect the other end of each network segment to a workstation or user
device. If the MiniHub is getting AC power, it will light the “LINK” LED
corresponding to each MiniHub port that has a powered-up and
functional device attached to it.

11
CHAPTER 3: Installation
3.2.4 U SING THE 8 TH P ORT AND THE U P -L INK S WITCH
For the 8th RJ-45 port only, use the Up-Link crossover switch (also on the rear
panel) to select either a normal 10BASE-T connection to a user device (switch
in the “===” position) or a special network-uplink connection to another hub
or concentrator (switch in the “=
x
=” position). A special cross-pinned cable
for uplinks is not needed with Stackable MiniHubs, because with the Up-Link
switch in the “=
x
=” position the pinning is crossed inside the MiniHub.
Insert the male plug on one end of a standard 10BASE-T cable into the 8th
RJ-45 female port on the Stackable MiniHub. Connect the other end of the
network segment to a workstation or user device if the Up-Link switch is in
the “===” position, or to a network hub or concentrator if the Up-Link switch
is in the “=
x
=” position.
Even when the rear port is physically uplinked (cable runs from the port
to a larger network), you can logically isolate the users and devices on the
Stackable MiniHub by moving the Up-Link switch to the “===” position. In
this situation, the uplink segment is inoperative and full bandwidth is
available locally.

12
STACKABLE MINIHUB
3.3 Stacking the MiniHubs
When you need increased network capacity, you can easily stack up to five
Stackable MiniHubs to form a single logical repeater of up to 40 RJ-45 ports.
Figure 3-1. Stacking the MiniHubs.
NOTE
Secure the units with the stacking/mounting brackets before making the
following electrical connections. You cannot install the brackets while
the connector cables are in place.
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A

13
CHAPTER 3: Installation
Follow these steps when stacking:
1. Switch the Stack Enable switch of the bottom Stackable MiniHub to the
“OFF” position (left).
2. Switch all other units to the “ON” position (right).
3. Using the IRB ribbon cable, connect one end to either Inter-Repeater-
Bus connector (IRB1 or IRB2) of the bottom Stackable MiniHub.
Connect the other end of the cable to the corresponding IRB connector
of the top Stackable MiniHub (i.e, the IRB cable connects from IRB1 to
IRB1, or from IRB2 to IRB2).
4. If you will add more Stackable MiniHubs, connect another IRB cable
from the unused IRB connector of the existing stack’s top unit to the
corresponding IRB connector of the Stackable MiniHub you will add.
Make sure that the Stack Enable Switch of the added unit is set to the
“ON” position. You can stack up to five Stackable MiniHubs in this way.
5. Each unit of the stack must be powered by its own external power supply.
Make sure that the PWR LED of each unit is lit to verify “Power On.” If
one unit of the stack is powered off, the rest of the stack will still function
properly.

14
STACKABLE MINIHUB
Figure 3-2. Two Stacked MiniHubs—16 RJ-45 Ports.
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Figure 3-3. Three Stacked MiniHubs—24 RJ-45 Ports.

15
CHAPTER 3: Installation
Figure 3-4. Four Stacked MiniHubs—32 RJ-45 Ports.
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Stackable MiniHub
Ports 12345678
Stack Enable
LINK/TX
8
7
6
5
4
3
2
1
PORTS
PWR
COL
POL/TX
UP LINK
Off
IRB1 IRB2 On
PWR
12VDC, 1A
Figure 3-5. Five Stacked MiniHubs—40 RJ-45 Ports.