Black Box LE2650A User manual

CUSTOMER
SUPPORT
INFORMATION
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Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
JUNE 2001
LE2650A
LE2650AE
Personal MiniHub
10BASE-T
12V #AUI
PARALLELPARALLEL
RX
LINK
PORT
Personal MiniHub
1234
PORT 5
PWR
RX
LINK
UP LINK

1
PERSONAL MINIHUB
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE STATEMENT
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 J 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 Industry Canada.
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 édicté par Industrie Canada.
TRADEMARKS
UL®is a registered trademark of Underwriters Laboratories, Incorporated.
Velcro®is a registered trademark of Velcro USA, Inc.
Any other trademarks mentioned in this manual are acknowledged to be the property
of the trademark owners.

2
PERSONAL MINIHUB
Contents
Chapter Page
1. Specifications ..................................................................................................3
2. Introduction....................................................................................................4
2.1 Inspecting the Package and Product ...................................................4
2.2 Description ............................................................................................4
2.3 Features and Benefits............................................................................7
2.4 Applications...........................................................................................8
3. Installation.....................................................................................................10
3.1 Table-Top or Shelf Mounting ............................................................12
3.2 Wall (or Vertical Surface) Mounting .................................................12
3.3 Twisted Pair Segment Connection.....................................................14
3.4 Up-Link Option on Port #5 (Up-Link Switch)..................................15
4. Operation ......................................................................................................17
5. Troubleshooting ...........................................................................................18
5.1 Before Calling for Assistance..............................................................18
5.2 When Calling for Assistance...............................................................19
5.3 Return Material Authorization (RMA) Procedure ...........................19
5.4 Shipping and Packaging Information................................................20

3
CHAPTER 1: Specifications
1. Specifications
Network Standards — Ethernet
V2.0, IEEE 802.3: 10BASE-T
(the Hub is a physical-layer
standard Ethernet product and
operates independently of all
software)
Operating Environment — Ambient
Temperature: 32 to 122° F (0 to
50° C); Storage Temperature: -4
to 140° F (-20 to 60° C)
Power — LE2650A: 115 VAC,
60 Hz power supply,, UL®listed,
CSA certified; LE2650AE:
230 VAC, 50 Hz power supply,
UL®listed, CSA certified, TUV
and GS approved
Size — 0.8"H x 3.3"W x 4.8"D
(2 x 8.4 x 12.2 cm)
Weight — Hub: 0.8 lb. (0.4 kg);
Power supply: 1 lb. (0.5 kg)
Standards — IEEE 802.3 Ethernet
Connectors — (5) RJ-45 female:
(4) station ports, (1) switch-
selectable uplink/station port
Indicators — (11) LEDs: (5) LINK,
(5) RX, (1) PWR
Switches — (1) uplink switch on side
of unit
Performance — Data Rate: 10 Mbps,
Partitioning: Enforced after 32
consecutive collisions;
Reconnect: Occurs after 512
bits error-free transmission
Maximum Ethernet Segment
Lengths — UTP (Unshielded
10BASE-T): 328 ft. (100 m);
STP (Shielded 10BASE-T):
492 ft. (150 m)

4
PERSONAL MINIHUB
2. Introduction
2.2 Description
The Personal MiniHub is a five-port
10BASE-T workplace hub in a very
compact package. It can expand
a “power user’s” existing single
network port to provide up to three
extra ports in the immediate office
or lab area. It is simple to install and
use in an office or lab environment,
requiring no special rack cabinets
or wiring-closet apparatus. The
MiniHub is a standard physical-layer
Ethernet product and operates
independently of all software.
The Personal MiniHub is also well-
suited for small-to-medium sized
office or lab environments (two
to four persons) that need an
independent Ethernet network.
Small independent networks built
using the Hub are easily expanded
by cascading hubs of equal or
greater capacity. See Section 3.4 for
more about the Up-Link switched-
port feature.
2.1 Inspecting the Package and
Product
Examine the shipping container for
obvious damage before installing
this product; notify the carrier of any
damage that you believe occurred
during shipment or delivery. Inspect
the contents of this package for any
signs of damage and make sure that
the items listed below are included:
• Personal MiniHub
• External power supply, either
115 VAC, 60 Hz (LE2650A) or
230 VAC, 50 Hz (LE2650AE)
• (1) Velcro®tape section,
approximately 3 inches long
• (2) Rackmount brackets and
screws
• This User’s Guide
Remove the Personal MiniHub
from the shipping container. Be sure
to keep the shipping container in
case you need to ship the unit at a
later date.
If any items are missing or
damaged, contact Black Box.

5
CHAPTER 2: Introduction
The Personal MiniHub’s small
size makes it very useful for demon-
stration situations in conference
rooms and in exhibitions where
a temporary network or network
expansion is needed. The Personal
MiniHub takes up minimal space
and uses minimal power, and is
rugged enough to be carried in a
coat pocket.
The Personal MiniHub fits easily
into the workplace environment. It
ican be mounted on a tabletop or
shelf, or, with the included Velcro®
strip, on a wall surface, or on the
back or side of a desk or cabinet. All
of the wiring connectors are in the
same place, so that wiring space is
neat and minimal. The external
power supply conveniently plugs
into an available AC wall receptacle
or power strip.
10BASE-T
12V #AUI
PARALLELPARALLEL
RX
LINK
PORT
Personal MiniHub
1234
PORT 5
PWR
RX
LINK
UP LINK
Fig. 2-1. Personal MiniHub.

Fig. 2-3. Top View—Personal MiniHub.
6
PERSONAL MINIHUB
1234
Fig. 2-2. RJ-45 10BASE-T Ports.
10BASE-T
12V #AUI
PARALLELPARALLEL
Personal MiniHub
1234
1RX
LINK
PORT
PORT 5
PWR
RX
LINK
UP LINK
The Personal MiniHub includes
Link and RX LEDs for each RJ-45
port, and one LED for power,
located near the external power
supply. Since each LED is near the
port it monitors, it is easy to
associate the status LED for each of
the ports with the appropriate port.

7
The external power supply that
comes with the Personal MiniHub is
one of two types: one version for AC
input power of 115 VAC, 60 Hz, and
one version for 230 VAC, 50 Hz. The
115-VAC version has a small trans-
former integral with a convenience
power outlet plug, and a lightweight
DC power cord to the applicable
power jack on the hub. The 230-VAC
version has a small transformer
integral with an IEC-type power plug
for a user-supplied AC power cord
with a convenience power outlet
plug. It also includes a lightweight
DC power cord to connect to the
power jack on the Personal
MiniHub unit.
2.3 Features and Benefits
• Interconnect to an existing
Ethernet network—The
Personal MiniHub provides an
Up-Link switch for port #5 to
be used to connect it into an
existing Ethernet environment
(such as the central hub for the
building or area) via 10BASE-T
wiring.
• Interoperable with other
Ethernet devices—The
Personal MiniHub is completely
interoperable with other
Ethernet-compliant network
devices. Each is fully compliant
with IEEE 802.3 specifications
for 10 Mbps CSMA/CD opera-
tion. This allows the Hub to be
integrated within any standard
Ethernet network and to operate
with all standard software.
• Installation versatility—The
Personal MiniHub is simple
and easy to install in almost any
office or lab location. The tiny
package is very unobtrusive.
• Robust Network Operations—
The Personal MiniHub uses the
“star” network topology and has
automatic per-port partitioning
and reconnection. A fault on
one segment is isolated from the
rest of the network, avoiding
most network downtime.
CHAPTER 2: Introduction

8
PERSONAL MINIHUB
• LEDs simplify network
installation and maintenance—
The Personal MiniHub is
equipped with a full comple-
ment of LEDs to provide status
about basic network activity. Five
Link LEDs offer a very simple
way for operational connections
to be verified at the end of each
10BASE-T segment.
• Low-cost, standalone 10BASE-T
connectivity—Operating in a
standalone environment as a
self-sufficient device, the
Personal MiniHub offers 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.
2.4 Applications
Expanding from one to four ports at
an existing site is easy, and requires
no modification to typical building
wiring. The installer simply plugs the
existing networked device’s network
cable segment into one of the
MiniHub’s front RJ-45 ports. The
Up-Link port #5 (with switch set to
X) connects via 10BASE-T cabling
to the existing network outlet. Then,
power is connected to the Hub by
plugging in its external power supply
unit to an AC power receptacle, and
plugging the DC power plug into the
jack on the back/rear of the unit. In
minutes, three new ports are
available for other networked
devices.
10BASE-T
12V #AUI
PARALLELPARALLEL
Personal MiniHub
1234
1RX
LINK
PORT
PORT 5
PWR
RX
LINK
UP LINK
Fig. 2-4. Attaching to a Backbone.
PCs
Laser Printer

9
Up to five RJ-45 user ports are
available where only 10BASE-T
wiring is used, and full-length
Ethernet segments are supported on
all five segments. In this application,
the “Up-Link” switch is in the
straight-through or = position, so
that port #5 on the back of the unit
is a user port (not an up-link to
another hub).
The Personal MiniHub may also
be used as a standalone to network a
local personal multi-user system such
as shown in Fig. 2-5.
Fig. 2-5. Hub Used in a Standalone Network.
10BASE-T
12V #AUI
PARALLELPARALLEL
Personal MiniHub
1234
1RX
LINK
PORT
PORT 5
PWR
RX
LINK
UP LINK
User Port
PC
PCs
Laser Writer
CHAPTER 2: Introduction