Accton Technology SuperSmart EtherHub-16se User manual

Installation Manual
SuperSmart
EtherHub-16se

Installation Manual
SuperSmart
EtherHub-16se
Advanced
16-Port 10BASE-T
Smart Ethernet Hub

Copyright (c) 1995 by Accton Technology Corporation. All rights reserved.
No part of this document may be copied or reproduced in any form or by any means without the prior written
consent of Accton Technology Corporation.
Accton makes no warranties with respect to this documentation and disclaims any implied warranties of
merchantability, quality, or fitness for any particular purpose. The information in this document is subject to change
without notice. Accton reserves the right to make revisions to this publication without obligation to notify any person
or entity of any such changes.
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No. 1 Creation Road III,
Science-based Industrial Park
Hsinchu 300, Taiwan, R.O.C.
Phone: [phone]
FAX: [phone]
BBS: 886-35-770-654
Internet: [email protected]
:8&-HDGTXDUWHUV
1962 Zanker Road
San Jose, CA 95112
Phone: [phone]
FAX: [phone]
BBS: 408-452-8828
FAST FAX: [phone]
Accton, EtherHub and SwitcHub are trademarks or registered trademarks of Accton Technology Corporation. Other
trademarks or brand names mentioned herein are trademarks or registered trademarks of their respective
companies.
E0895-R01
150483-101

FCC Warning
FCC Warning i
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. Its
operation in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his
own expense.
A shielded transceiver cable is required to be used in order to ensure
compliance with FCC Part 15; it is the responsibility of the user to
provide such cable.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
Canadian Standards Association (CSA) Statement
This digital apparatus does not exceed the Class A limits for
radio noise emissions from digital apparatus as set out in the
radio interference regulations of the Canadian Department of
Communciations.

Sicherheitshinweise
Sicherheitshinweise iii
1. Die Steckdose mußsich in der Nähe des Gerätes befinden und leicht
zugänglich sein.
2. Zum Reinigen den Stecker aus der Steckdose ziehen. Beim Reinigen
keine Flüssigreiniger oder Sprays verwenden, sondern ein
angefeuchtetes Tuch.
3. Das ...... gerät nicht in Naßräume oder in der Nähe von Wasser
benutzen, wie z.B. Badezimmer, Schwimmbad, Spülbecken usw. . Das
Eindringen von Wasser kann zur Zerstörung des Gerätes führen.
4. Das ...... gerät nicht auf einer unstabilen Unterlage, wie z.B.
Rollwagen, Gestell usw., aufstellen. Es könnte herunterfallen und
Verletzungen oder Beschädigungen von Mensch und Gerät
verursachen.
5. Die Belüftungsöffnungen nicht blockieren oder auf falscher Ober-
fläche, wie Bett, Sofa usw., stellen. Durch die Blockierung kann es zur
Zerstörung des Gerätes durch Überhitzung kommen.
6. Versuchen Sie niemals dieses Gerät selbst zu warten, da beim Öffnen
oder Abnehmen des Gehäuses die Gefahr eines elektrischen Schlages
besteht.
7. Keine Gegenstände auf das Anschlußkabel stellen, damit es nicht
durch scharfe Kanten zerstört werden kann.
8. Keinerlei Gegenstände durch die Öffungen in das Gerät stecken, da es
dadurch sonst zu Kurzschlüssen kommen kann.
9. Bei Störungen des Gerätes den Wartungsdienst verständigen.
10. Bei Reperaturen dürfen nur Orginalersatzteile oder Bauteile mit
gleichen Eigenschaften verwendet werden. Andere Bauteile können
Feuer, elektrischen Schlag oder andere Gefahren verursachen.
11. Nach Beendigung von Wartungsarbeiten oder Reperaturen durch den
Kundendienst sollte die Sicherheitsprüfung durchgeführt werden.
12. Bei längerem Stillstand des Gerätes, ist diese von der Versorgungs-
spannung zu trennen. Dies verhindert eine Beschädigung des Gerätes
durch eine Überspannung in der Zuleitung.
Der arbeitsplatzbezogene Lärmschutzpegel nach DIN 45 635 ist kleiner
70dB (A).

About this Guide v
About this Guide
This is an installation guide for Accton’s SuperSmart Ethernet
Hub. It covers the following topics:
ì Hardware description and summary of features
ì Hardware installation procedure
ì System setup and configuration
Package Checklist
Carefully unpack the contents of the package and verify them
against the checklist given below.
æEtherHub-16se (Model No. EH2051)
æOne AC power cord
æ0.5 meter FlexBus 1500cable
æFour rubber feet
æBNC T-type connector and two 50-ohm (Ω) terminators
(for models with the BNC transceiver module only)
Please inform your dealer immediately should there be any
wrong, missing, or damaged parts. If possible, retain the carton,
including the original packing materials. Use them again to
repack the unit in case there is a need to return it for repair.
To qualify for product updates and product warranty
registration, fill in the Owner Registration Card and return it
to Accton Technology Corporation.

Contents
vii
Chapter 1: Introduction 1-1
Overview 1-1
Features of the SuperSmart Hub 1-2
Chapter 2: Hardware Description 2-1
Front Panel Display 2-1
SmartWatchLED Panel 2-1
PWR/CPU 2-2
Isolated 2-2
Utilization 2-2
Collision 2-3
Segment LED Indicators 2-4
Port Status Indicators 2-4
Partition 2-5
Link/Traffic 2-5
Diagnostic Test LED Indicators 2-6
Configure Button 2-7
Station Ports 2-8
Daisy-Chain Switch 2-8
Rear Panel Displays 2-9
Port Connections 2-9
FlexBus 1500™ 2-9
ALT Port 2-10
BNC Module (10BASE2) 2-10
Power Socket 2-10
Power Switch 2-10
Chapter 3: Hardware Installation 3-1
Before You Begin 3-1
Hardware Installation 3-2
Stacking Hubs without a Rack 3-3
Mounting Hubs on a Rack 3-4
Connecting the Hub System 3-5

SuperSmart User’s Guide
viii Contents
Chapter 4: Setup and Configuration 4-1
System Setup 4-1
Diagnostic Tests 4-1
Upon Power On 4-1
During Normal Operation 4-1
Multi-Segment Architecture 4-2
Hot Remove Function 4-2
Using the Configure Button 4-3
Selections Available 4-5
Appendix A: Product Specifications A-1
Features A-1
Physical Characteristics A-1
Standards Compliance A-2
Appendix B: Product Support Services B-1
Product Registration B-1
Problem Report B-1
Hardware Repair Service B-1
Software Update and Upgrade Service B-2
Bulletin Board Service (BBS) B-2
Interactive Fast Fax (U.S.A. office) B-3
Technical Support B-3
Limited Warranty B-4
Customer Remedies B-4
Return Process B-5
Ordering Information B-6
Glossary
Index

List of Figures
ix
Figure 2.1 SmartWatch LED Panel 2-1
Figure 2.2 Daisy-Chain Switch Setting 2-8
Figure 2.3 The SuperSmart Rear Panel 2-9
Figure 3.1 Stacking Hubs without a Rack 3-3
Figure 3.2 Mounting Hubs Using a Mounting Rack 3-4

1-1
Chapter 1: Introduction
Overview
The SuperSmart (EtherHub-16se) hub is a powerful and
innovative LAN network enhancement product. This hub
supports a multi-segment bus architecture that enhances traffic
flow and network bandwidth utilization. It offers the network
manager a wide range of flexible configuration options,
allowing you to effectively increase your network’s bandwidth.
The SuperSmart hub can be used in a stand-alone configuration
to form a simple LAN networking 2 to 16 computers using the
RJ-45 ports. Further network expansion can be achieved using
the trunk port connection (optional ALT PORT for BNC, AUI or
fiber-optic interface), or the RJ-45 daisy-chain port. Workstations
are connected to the SuperSmart station ports using twisted-pair
cable.
SuperSmart is a 16-port intelligent 10BASE-T hub. It includes -
• 16 RJ-45 station ports for networking computers to the network
using twisted-pair cable
• 1 optional port for installing an AUI, BNC or fiber-optic
module, which permits connection to thick or thin Ethernet
or 10BASE-F cable
• 2 FlexBus1500 ports for connecting to compatible hubs
via a FlexBus 1500 cable
• RJ-45 port 16 which can be converted to a daisy-chain port
() using the daisy-chain switch
• Comprehensive LED indicators on the front panel to provide
easy and quick configuration and monitoring of the unit
Alternative Interface Module -
• BNC (EH1551), default module preinstalled in EH2051
• AUI (EH1552)
• Fiber Optic (EH1553)

SuperSmart User’s Guide
1-2 Introduction
Features of the SuperSmart Hub
• One optional port (BNC, AUI or fiber-optic) for connecting
to any Ethernet media via slide-in alternative module
transceiver
• Supports daisy chaining by using a daisy-chain switch to
convert port 16 to a daisy-chain port
• Automatic polarity detection and correction permits
automatic recovery due to wiring errors
• Automatically partitions any bad port to protect the network
• Flexible installation for desktop, wall-mount, or rack
installation (standard 19” size)
• Provides multi-segment architecture allowing the network to
be split into three segments
• Includes a SmartWatchcomprehensive LED indicator
panel for reporting network activity, unit configuration, and
facilitating problem diagnosis
• Two FlexBus 1500 interconnection ports (BUS IN/OUT) for
a bundled cable containing 3 separate Ethernet segments
• Provides front panel configuration using a Configure
button
• Stacked hubs can be distributed up to 100-meters in a single
segment configuration

2-1
Chapter 2:
Hardware Description
This chapter describes the hardware features of the SuperSmart hub.
Before connecting any network device to the hub, please read this
chapter carefully. For easier management and control of the hub,
familiarize yourself with the front panel indicators and
Configure button.
Front Panel Display
SmartWatchLED Panel
The SmartWatch LED panel includes comprehensive indicators
for monitoring the device and network status. A quick glance at
the front panel tells you if the unit’s power in ON, or if a
problem exists on the network. The following sections describe
the function of each indicator.
Figure 2.1 SmartWatch LED Panel

SuperSmart User’s Guide
2-2 Hardware Description
PWR/CPU
Color: Green
Label: PWR/CPU
Function: Power indicator
LED Activity Condition Indication
STEADY LIGHT ON Unit is receiving power; CPU is running.
BLINKING LIGHT ON Unit is receiving power; CPU is running.
NO LIGHT OFF Power is disconnected; no power received.
Isolated
Color: Green
Label: Isolated
Function: Indicates the hub is isolated from Ethernet segment
of the FlexBus 1500 backplane.
LED Activity Condition Indication
STEADY LIGHT ON Hub is isolated from all segments.
NO LIGHT OFF Hub is attached to one of the 3 segments of
the FlexBus 1500.
Utilization
Label (%) Color Function
1% 5% 15% Green Indicates percentage utilization of LAN
30% Amber (yellow) bandwidth.
65+% Red
The Utilization LEDs indicate the percentage of network
bandwidth used by valid data. The hub updates this display
every 0.5 seconds.
There are 5 LEDs representing the percentage of network
utilization. The corresponding LEDs light to show that the
percentage utilization of LAN bandwidth has reached this level.
When active, these LEDs look like a stereo’s equalizer display.

SuperSmart User’s Guide
Hardware Description 2-3
For example, if network utilization reaches 1%, the LED
labeled 1% will light. However, if network utilization rises
above 1% (e.g., 30%), the LED labeled 30 and all the other
LEDs before it (i.e., 1, 5, and 15) will light in rapid succession.
These LEDs monitor the share of valid network frames
transmitted by this hub within a 10Mbps bandwidth. They
provide a quick way to monitor the current traffic load relative
to the network’s capacity.
Collision
Label (%) Color Function
1% 3% 5% Green Indicates the percentage of packet collisions
10% Amber (yellow) occurring out of the total packets received by
15+% Red the hub.
Collisions occur when two or more devices connected to a hub
attempt to transmit data simultaneously on the network. When
a collision occurs, devices pause and then re-transmit after a
pseudo-random wait period. Because wait periods differ among
devices, successive collisions become increasingly improbable.
The Collision LEDs assist the network manager in monitoring the
percentage of packet collisions occurring relative to the total
packets received by the hub. Similar to Utilization LEDs, the
Collision LEDs have 5 numbers representing collision
percentage. When collisions reach a level marked on the LED
display, the corresponding LED lights up.
For example, if packet collisions reach 1%, the LED labeled
1% will light up. However, if collisions go beyond 1% (e.g.,
15%), the LED labeled 15+ and all the other LEDs before it
(i.e., 1, 3, 5, and 10) will also light up in rapid succession.

SuperSmart User’s Guide
2-4 Hardware Description
FWhen more than 31 consecutive collisions occur on the cable segment
connected to a port, that port is automatically partitioned by the hub. The
hub automatically reconnects this port when a data packet longer than
512 bits (normal) is transmitted or received by the partitioned port without
collision. This applies to all RJ-45 station ports and the ALT PORT.
Segment LED Indicators
Color: Green
Label:
Function: Indicates which segment is attached to the hub.
There are 3 Ethernet segments embedded in the FlexBus 1500
ports located on the back plane of the SuperSmart hub. The unit
can be attached to any one of the three Ethernet segments. The 3-
segment LED indicator displays a combination of ON/OFF lights
to show which segment the unit is connected to. The table below
shows the possible LED display combination of the segment
indicators marked "1 2 3" and their corresponding meaning.
Segment Description
123
ON OFF OFF Hub is connected to Segment 1 (Default)
OFF ON OFF Hub is connected to Segment 2
OFF OFF ON Hub is connected to Segment 3
FThe SuperSmart hub can be completely isolated except for the
management channel (which is reflected via the Isolated LED).
Port Status Indicators
There are 17 pairs of port status LED indicators. Each pair consists
of a Partition LED (top row) and Link/Traffic LED (bottom row).
Each pair (or column) has a label referring to the port number the
LEDs monitor. For example, the port status LED pair labeled ALT
monitors the optional port found at the rear panel (labeled ALT
PORT). The other 16 pairs are for the RJ-45 ports on the front
panel of the hub.

SuperSmart User’s Guide
Hardware Description 2-5
Partition
LED Activity Condition Indication
STEADY RED LIGHT PARTITION Indicates port partitioning due to an
abnormal network condition.
NO LIGHT OFF Port is in good condition.
FThe Partition LEDs are also used as diagnostic LEDs. Please refer
to the section on
Diagnostic Test LED Indicators later in this chapter
for more information.
Partition
A port is temporarily partitioned when a line error or too many
collisions are detected on the attached segment. While it is
automatically partitioned, the port continues to receive data
from the segment. However, data is not transmitted onto the
segment. When the problem is corrected or a valid data packet
is received through the port, the port is automatically recon-
nected. When partitioning occurs, the port’s corresponding
Partition LED will be continually lit (RED light). Otherwise,
this LED should be OFF (unlit).
Link/Traffic
LED Activity Condition Indication
STEADY GREEN LIGHT ON Indicates a valid link has been established on this
port.
BLINKING GREEN LIGHT ON Indicates the port is receiving packets; blinking is
proportional to the traffic passing through the port.
NO LIGHT OFF No valid link has been established on this port.
Link
The corresponding Link/Traffic LED should light up when a
device (e.g., computer, hub or bridge) establishes a valid
connection using the RJ-45 port. However, for the ALT port,
no link connection is tested. The Link/Traffic LED for ALT
only monitors the traffic condition.

SuperSmart User’s Guide
2-6 Hardware Description
TROUBLESHOOTING If the Link/Traffic LED does not light up when a device is connected to
its corresponding port, check that both the hub and connected device
are powered on. For devices connected to the hub using a twisted-pair
cable, check that the cable length does not exceed 100 meters. You
should have standard, straight cables and not cross-over or other
specialized cables.
Traffic
Traffic refers to the movement of packets being received by the
port. A port’s corresponding Link/Traffic LED will blink (ON)
in proportion to the rate of traffic passing through the port.
Through this LED, the network manager can easily view the
activity on a port.
Diagnostic Test LED Indicators
The RJ-45 Partition LEDs not only monitor the partition or
disabling of an RJ-45 port, they also monitor diagnostic test results.
LED Activity Condition Indication
BLINKING RED LIGHT ON The corresponding hardware component failed the
diagnostic test.
NO LIGHT OFF The corresponding hardware component
successfully passed the diagnostic test.
After power on, the hub automatically performs a diagnostic test.
Seven hardware components are tested for SuperSmart hub. During
this test, Partition LEDs indicate the success/failure of each test. The
following table shows what each Partition LED monitors.
Partition LED Indicator Test function/component
1 CPU
2 ROM
3 RAM
4 Serial communication controller
5 Hub control 1
6 Hub control 2
7 Timer

SuperSmart User’s Guide
Hardware Description 2-7
The system tests each component one at a time. The unit will
complete the test cycle even if a problem is detected on any of
the components. If no lights are ON, this means that all the hub
components passed the diagnostics. If any problems were
detected, the corresponding LED will blink after test
completion to indicate which component failed the test.
Configure Button
On the left front panel is a button labeled Configure. Use this
button for the following configuration functions:
• Segment Setting
• Demo (LED display demonstration)
• Diagnostics
• Reset
Move from one function to the next by using a "long press"on
the button. LED indicators will light up depending on the
selected system function. Make necessary choices within the
current function using a "short press". Then, use a "long press"
to effect your choice and move on to the next function. See
Using the Configure Button in Chapter 4 for related information.
F"Long press" in this User’s Guide means pressing the Configure button for
more than 2 seconds and then releasing it. "Short press" means pressing
the Configure button and immediately releasing it. Also, if the button is not
pressed within 10 seconds, the system returns to normal operation.

SuperSmart User’s Guide
2-8 Hardware Description
Station Ports
The unit has sixteen RJ-45 station ports. Using twisted-pair
cable, connect your workstation (via the network interface
card’s port) to any available RJ-45 port.
Port 16 can be converted into a daisy-chain port by enabling the
Daisy-Chain switch (see the following Daisy-Chain Switch section
for related information). Hence, this port can also be used to
connect the unit to another compatible unit using twisted-pair
cable.
Daisy-Chain Switch
This switch is located on the right side of the front panel beside
Port 16. It is used to enable/disable the daisy-chain function of
said port. When the switch is enabled, Port 16 can be used as a
daisy-chain port to link the unit to another compatible hub.
When the switch is disabled, Port 16 can only be used as a
station port. To enable daisy chaining, slide the switch to the
right ( ). To disable daisy chaining, slide it to the left ( ).
Enable Port 16 for
daisy chaining Disable Port 16 for daisy chaining
Figure 2.2 Daisy-Chain Switch Setting

SuperSmart User’s Guide
Hardware Description 2-9
Rear Panel Displays
This section describes significant features of the unit’s rear panel.
Connectors
IN OUT
FlexBus 1500
ON
OFF
ALT PORT
This device complies with Part 15 of the FCC
Operation is subject to the following two
(1) This device may not cause harmful
(2) This device must accept any interference
including interference that may cause
100-250 VAC
50 -60Hz 1A
POWER
SOCKET
POWER
SWITCH
Alternative Port
Figure 2.3 The SuperSmart Rear Panel
Port Connections
FlexBus 1500™
The unit has two FlexBus 1500 connectors labeled BUS IN and
BUS OUT for connecting the hub to a compatible hub. The
FlexBus 1500 cable that comes with this package is used
specifically for these ports.
BUS IN
Using a FlexBus 1500 cable, connect this port to the BUS OUT
port of a SuperSmart hub.
BUS OUT
Using a FlexBus 1500 cable, connect this port to the BUS IN
port of a SuperSmart hub.
FThe unit also supports "hot remove" for the FlexBus 1500 cable. This
allows you to unplug the FlexBus 1500 cable while the unit is powered on.