Compaq Netelligent 1017A/B User Manual

Netelligent 1017A/B
10Base-T Hub
User Guide

©1997 Compaq Computer Corporation.All rights reserved.
Compaq Registered U.S.Patent and Trademark Office.
Company and product names mentioned herein may be
trademarks and/or registered copyright and trademarks of
their respective companies.

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NOTICE

The information in this publication is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OR

EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING, PERFORMANCE, OR
USE OF THIS MATERIAL.

This publication contains information protected by copyright. No part of this publication may be
photocopied or reproduced in any form without prior written consent from Compaq Computer
Corporation.

The software described in this guide is furnished under a license agreement or non-disclosure agreement.
The software may be used or copied only in accordance with the terms of the agreement.

Product names mentioned herein may be trademarks and/or registered trademarks of their respective
companies.

 1997 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.

iii

Compaq

Registered United States Patent and Trademark Office.

Netelligent is a trademark of Compaq Computer Corporation.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

Second Edition (August 1997)

Part Number 167175-002

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Contents

Chapter 1

Overview

Features.........................................................................................................................1-1

Chapter 2

Hardware Description

Front Panel....................................................................................................................2-2

LED Indicator Panel..............................................................................................2-2

Station Ports...........................................................................................................2-6

Daisy-Chain Switch...............................................................................................2-7

v

Back Panel ....................................................................................................................2-7

Port Connections....................................................................................................2-8

Power Socket.........................................................................................................2-8

Power Switch.........................................................................................................2-9

Chapter 3

Installing the Hub

Site Requirements.........................................................................................................3-1

Connecting the Hub System .........................................................................................3-2

Chapter 4

Configuration

Stand-alone Configuration............................................................................................4-1

Connecting Multiple Hubs............................................................................................4-2

Using the RJ-45 Daisy-Chain Port ........................................................................4-2

Using Crossover Twisted-Pair Cable ....................................................................4-3

Backbone Connection...................................................................................................4-4

Using the BNC Port...............................................................................................4-4

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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vi

Using the AUI Port................................................................................................4-5

Guidelines for Multiple Hub Configurations................................................................4-6

Appendix A

Troubleshooting

Diagnosing Hub Indicators.......................................................................................... A-1

System Diagnostics...................................................................................................... A-2

Installation............................................................................................................A-2

Configuration........................................................................................................ A-2

Hub Integrity ........................................................................................................ A-3

Appendix B

Port and Cable Assignments

Appendix C

Specifications

Appendix D

Regulatory Standards Compliance

Index

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vii

Preface

This user guide is designed for the experienced network installer. It covers the
following information to help in the installation and operation of the Netelligent
1017A/B 10Base-T Hub:

Q

Hardware description and summary of features

Q

Hardware installation and configuration

Q

Troubleshooting tips

Package Checklist

Carefully unpack the contents of the package and verify them against the
checklist given below.

Q

1017A/B 10Base-T Hub

Q

BNC T-type connector

Q

AC power cord

Q

Compaq Netelligent User Guide CD

Q

Compaq Netelligent 10Base-T Hub Quick Install Guide

Q

Warranty registration card

If there are any incorrect, missing, or damaged parts, contact your Compaq
Authorized Reseller. If possible, retain the carton, including the original
packing materials, in case you need to repack the contents and return the hub for
repair.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

Writer: Chris Seiter Project: Preface Comments:

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1-1

Chapter 1

Overview

The Netelligent 1017A/B 10Base-T Hub is a 16-port Ethernet hub which
features an on-board microprocessor designed to monitor network utilization,
collisions, link and port partition status. The hub’s comprehensive LED
indicator panel simplifies installation and network troubleshooting by showing
network utilization and collision levels at the hub ports.

Features

The hub also provides the following features:
Automatic Partitioning and Reconnection – automatically isolates a port in

the event of excessive collisions and reconnects the port when normal operation
resumes

Jabber Lockup Protection –automatically stops transmission of abnormal
Ethernet frames that could cause data loss for the network

Automatic Polarity Detection – recognizes and adjusts 10Base-T ports for
attached cable assemblies which may be wired with incorrect polarity on the
receive pair

16 independent RJ-45 ports – enables network connections using 10Base-T
twisted-pair cable

Cascading – lets you connect the 1017A/B hub to another 1017A/B or
compatible hub using a switch to convert Port 16 to an uplink port

BNC and AUI Port – lets you connect the hub to 10Base2 (BNC) cabling and
10Base5 or fiber optic cabling via a suitable transceiver connected to the AUI

IEEE 802.3 Compliant – conforms to IEEE 802.3 repeater specification, as
well as the 10Base-T, 10Base2 and 10Base5 standards

Flexible Installation – lets you mount the hub on desktop or in a standard 19­inch rack

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2-1

Chapter 2

Hardware Description

The 1017A/B 10Base-T Hub is a highly reliable network concentrator that
complies with IEEE 802.3 specifications. By passing data signals received on
any port to all other ports, without modification, this hub meets the
requirements for both Ethernet and IEEE 802.3 networks.

This chapter describes the main hub components. For easier management and
control of the hub, familiarize yourself with the front panel indicators. Figure
2-1 shows the front panel of the hub where the comprehensive LED indicators,
16 RJ-45 station ports and the uplink switch are located. Figure 2-2 shows the
trunk ports, power connector and power switch on the hub's back panel.

Figure 2-1

Figure 2-2

. Front Panel

. Back Panel

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Hardware Description

2-2

Front Panel

This section describes the 1017A/B hub’s front panel.

LED Indicator Panel

The LED indicator panel includes comprehensive indicators for monitoring
device and network status. The LEDs on the front panel let you easily monitor
the status of each port, plus the overall condition of the hub. The following
sections describe the function of each indicator.

Figure 2-3

. LED Panel

Power

Color: Green
Label: Power
Function: Power indicator

LED Activity Condition Indication

STEADY LIGHT ON Unit is receiving power.

NO LIGHT OFF Power is disconnected; no power received.

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2-3

CPU

Color: Green
Label: CPU
Function: Power indicator

LED Activity Condition Indication

BLINKING LIGHT ON CPU is running.

NO LIGHT OFF CPU is not running.

Utilization

Label (%) Color Function

1% 5% 15% Green

30% 65+% Amber (yellow)

Indicates percentage utilization of LAN

bandwidth.

The Utilization LEDs indicate the percentage of network bandwidth used by
valid data. The hub updates this display every 0.5 seconds.

There are five LEDs that represent 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.

For example, if network utilization reaches 1%, the LED labeled 1% lights.
However, if network utilization rises above 1% (for example, 30%), the LED
labeled 30 and all the other LEDs before it (that is, 1, 5, and 15) light in rapid
succession.

These LEDs monitor the share of valid network frames transmitted by this hub
within a 10Mb/s bandwidth. They provide a quick way to monitor the current
traffic load relative to the network's capacity.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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2-4 Hardware Description

Collision

Label (%) Color Function

1% 3% 5% Green
10% 15+% Amber (yellow)

Indicates the percentage of packet collisions
occurring out of the total packets received by
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 five numbers that
represent collision percentage. When collisions reach a level marked on the
LED display, the corresponding LED lights.

For example, if packet collisions reach 1%, the LED labeled 1% lights.
However, if collisions go beyond 1% (for example, 15%), the LED labeled 15+
and all the other LEDs before it (that is, 1, 3, 5, and 10) also light in rapid
succession.

NOTE: After 32 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
by the partitioned port without collision. This applies to all RJ-45 station ports, as
well as the AUI/BNC backbone ports.

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2-5

Port Status Indicators

There are 18 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 pairs labeled AUI and BNC monitor the AUI and
BNC ports on the back panel. The other 16 pairs are for the RJ-45 ports on the
front panel of the hub.

Partition

LED Activity Condition Indication

STEADY YELLOW

LIGHT

NO LIGHT OFF Port is in good condition.

PARTITION Indicates port partitioning due to a cable error

or other abnormal network condition.

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 transmit data to the segment. However, bad data is not repeated
from the segment. When the problem is corrected or a valid data packet is
received through the port, the port is automatically reconnected. When
partitioning occurs, the port's corresponding Partition LED will be continually
lit (YELLOW 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.

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Hardware Description

2-6

Link

The corresponding Link/Traffic LED lights when a device (for example,
computer, hub or bridge) establishes a valid connection using the RJ-45 port.
However, for the AUI and BNC ports, no link connection is tested. The
Link/Traffic LED for these ports only monitor the traffic condition.

Station Ports

TROUBLESHOOTING I

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-through cables and not crossover or other specialized cables.

f the Link/Traffic LED does not light when a device is

Traffic

Traffic refers to the movement of packets being received by the port. A port's
corresponding Link/Traffic LED flashes (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.

The hub has 16 RJ-45 station ports. Using straight-through twisted-pair cable,
connect your workstation (via the network interface card's port) to any available
station port.

You can easily convert Port 16 into an uplink port by moving the uplink switch
to the MDI position (see “Setting the Uplink
This lets you expand your network by connecting the 1017A/B hub to another
compatible hub using straight-through twisted-pair cable.

Switch

” for related information).

To connect to another hub, you can also run straight-through twisted-pair cabling
from a station port on this hub to a crossover port on another hub. However, if you
must connect to another hub via stations ports at both ends of the cable, use
crossover cabling.

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2-7

Setting the Uplink Switch

The uplink switch is located on the right side of the front panel beside Port 16.
It enables or disables the uplink function of Port 16. When the switch is
enabled, Port 16 functions as an uplink port for connecting to another
compatible hub. When the switch is disabled, Port 16 functions as a normal
station port for connecting to a workstation. To enable the uplink capability,
slide the uplink switch to the right (MDI). To disable the uplink capability, slide
the switch to the left (MDI-X).

Figure 2-4

Back Panel

This section describes the hub's back panel components.

Figure 2-5

. Uplink Switch Setting

. 1017A/B Hub Back Panel

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Hardware Description

2-8

Port Connections

BNC Port (10BASE2)

This hub has a built-in BNC transceiver for a connection using thin coaxial
cable. The BNC port can link up to 30 hubs on a thin coaxial cable segment.
The thin coaxial cable that links the BNC ports may be extended up to 185
meters and have computers or other Ethernet devices attached to it. When
connecting two hubs via BNC ports, there should be at least 0.5 meters (about
two feet) of coaxial cable between the two BNC ports. If the hub is at the end of
an Ethernet cable, plug and lock a 50-ohm (Ω) terminator to the T-type
connector on the BNC port.

: Terminate an open end of any T-type connector that is plugged into a BNC port

NOTE

with a 50-ohm (Ω) terminator. In particular, when a hub using the BNC port connection

is at the end of an Ethernet segment, terminate the open end of the T-type connector

with a 50-ohm (Ω) terminator. Also, if the BNC port is not used, plug a T-type

connector to it and terminate both ends with a 50-ohm

(Ω) terminator.

AUI Port (10BASE5)

The AUI trunk port on the back panel can be used to further expand your
network by connection to -

Q

Thin Ethernet cable (10Base2)

Q

Thick Ethernet cable (10Base5)

Q

Fiber-optic Ethernet cable

Attach an appropriate transceiver directly to the AUI port for thin Ethernet or
fiber-optic connection, or to the backbone itself for thick Ethernet connection.
(Connection to thick Ethernet is normally made by running an AUI drop cable
from the hub to a 10Base5 transceiver attached to the trunk line.)

Power Connector

The power connector accepts AC power from 100~240V at 50~60 Hz. The hub
is equipped with a universal full-range power source.

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2-9

Power Switch

The power switch is located at the right side of the back panel. It is used to
power the hub on and off.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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3-1

Chapter 3

Installing the Hub

This chapter describes how to install the 1017A/B 10Base-T Hub. It describes
specific installation requirements, installation procedures, and basic network
connections.

Site Requirements

Consider the following site requirements before you install the hub.

Q

Verify that the power source meets the following electrical
specifications.

AC Power Frequency

100 to 240V (+/- 10%) 50 to 60Hz (+/- 3Hz)

The hub is equipped with a power supply that automatically detects the
input voltage level.

Q

Leave at least 10 cm. of space at the front and back of the hub for
ventilation. We recommend that you install the hub in a cool, dry area.

Q

If you plan to mount the hub in a rack, be sure you have all the required
screws, brackets and tools you need for proper installation.

Q

Be sure the installation location is either a level surface (for example, a
table or shelf) or a standard, 19-inch equipment rack. A good location is
at the center of all the devices you want to link, close to the trunk
segment, and near a power outlet.

Q

Be sure you connect the hub only to another 1017A/B or compatible
10Base-T hub.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Installing the Hub

3-2

Connecting the Hub System

Follow these steps to connect the hub to your network.

1. Cascade hubs using the uplink port (Port 16).

You can convert RJ-45 port 16 to an uplink port to allow cascading to
other 1017A/B or compatible hubs. The hub’s uplink switch reverses
transmit and receive signals, which lets you use straight-through cable to
cascade hubs instead of crossover cable. To enable the uplink capability,
slide the uplink switch to the right (MDI), and plug one end of a twisted­pair cable to Port 16 and the other end of the cable to any RJ-45 port of a
compatible hub. (However, you must not plug both ends to an uplink
port.) If all your hubs are from Compaq, you can cascade up to five hubs
using this type of connection. Otherwise, limit your cascade to four
hubs.

: Do not plug in a phone jack connector to the RJ-45 port. This may

NOTE

damage the hub. Instead, use only twisted-pair cables with RJ-45 connectors

that conform with FCC standards.

2. Connect the hub to an Ethernet trunk, if necessary.

BNC - Plug the BNC T-type connector into the BNC port of the hub, and
use this port to connect the device to a 10Base2 Thin Ethernet trunk. If the
hub is at the terminal end of a trunk segment, then connect a 50-ohm (Ω)
terminator to the open end of the "T" connector. If the Ethernet BNC
trunk port has no connection, plug in the BNC T-type connector and lock
both ends with a 50-ohm (Ω) terminator.

AUI - Attach an AUI to 10Base5 transceiver to the Thick Ethernet trunk,
and then run an AUI drop cable (with 15-pin D-type connectors on both
ends) between the AUI port of the hub and the transceiver. Note that the
maximum length of an AUI drop cable is 50 meters.

AUI to BNC or fiber-optic - If you plan to use the hub's AUI port for
connecting to 10Base2 or fiber-optic cable, attach an appropriate MAU
converter to the AUI port. (Use an AUI to 10Base2 transceiver for
10Base2 cabling, or AUI to fiber optic transceiver for fiber-optic
cabling.) Connect the transceiver to the corresponding cable.

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3-3

: If your transceiver provides an SQE (Signal Quality Error) test, then it

NOTE

must be disabled.

3. Connect workstations to the hub.

Prepare the workstations you want to network. Be sure they have
properly installed 10Base-T network interface cards, or external 10Base­T transceivers.

Prepare straight-through twisted-pair cables with RJ-45 plugs at both
ends. The length of each cable should not exceed 100 meters.

Connect each computer to an available RJ-45 station port
on the hub using twisted-pair cable. Connect one end of the cable to the
RJ-45 port of the PC's network interface card and the other end to an
available station port on the hub. When inserting an RJ-45 plug, be sure
the tab on the plug clicks into position to ensure that it is properly seated.

Using the hub in a stand-alone configuration, you can network up to 16
workstations.

: You can also connect a workstation to the AUI or BNC ports located on

NOTE

hubs panel if required. However, be sure you use a proper transceiver when

connecting to these ports.

4. Install the power cord and power on the hub.

Plug the power cord into the power socket at the rear of the hub. Then
connect one end of the cord to an electric outlet.

Power on the hub by pressing the power switch to ON. Check the LED

PWR

indicator marked
The hub automatically selects the setting that matches the input voltage

connected. Therefore, no additional adjustments are necessary when
connecting it to any input voltage within the range marked on the back
panel.

: The hub supports a "hot remove" feature which lets you connect or

NOTE

disconnect cables while the hub is powered on without disrupting operation.

on the front panel. It should be on.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Installing the Hub

3-4

5. Verify that all attached devices have a valid connection.

The hub monitors link status for each port. If any device is properly
connected to the hub and transmitting a link beat signal, the
indicator lights for the corresponding port. If valid traffic is being
transmitted by the connected device, the same indicator (now referred to

Traffic

as the

indicator) flashes to indicate network activity.

Link

If the

Link

indicator fails to light (or the

Partition

indicator does light)

when you connect a device to the hub, check the following items:

 Be sure the twisted-pair cable is properly attached to the connected

device and the hub. Verify that the RJ-45 plug snaps into place
when attached.

 See if the twisted-pair cable is functioning properly by using it for

another port and attached device that displays valid indications
when connected to the network.

 Check the length of the twisted-pair cable to be sure it does not

exceed 100 meters.

 Verify that the workstation’s adapter card is functioning properly by

trying it in another computer that has been successfully connected to
the network.

If you still cannot resolve the problem, refer to “Troubleshooting” in
Appendix A.

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4-1

Chapter 4

Configurations

The 1017A/B 10Base-T Hub allows flexibility in configuring your network.
You can use the hub in a stand-alone or multiple hub configuration. The hub’s
RJ-45 uplink port (Port 16) lets you cascade multiple hubs using Category 3, 4
or 5 unshielded twisted-pair cable, or you can connect multiple hubs through a
backbone connection.

You can install the 1017A/B hub in a standard wiring closet or in a workgroup.
The only limitation is that all end-node devices (for example, workstations or
servers) must be within 100 meters of the connected hub.

Stand-alone Configuration

The 1017A/B hub can function as a simple stand-alone configuration as shown
below. Based on IEEE 802.3 standards, the maximum cable distance between
the hub and any workstation is 100 meters.

Figure 4-1

. Stand-Alone Configuration

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Configuring the Hub

4-2

Connecting Multiple Hubs

The following sections describe how to connect multiple hubs using the
1017A/B hub’s RJ-45 uplink port, crossover twisted-pair cable, and a backbone
connection.

Using the RJ-45 Uplink Port

The 1017A/B hub provides an uplink port you can use to connect to another
hub. You can convert Port 16 to an uplink port by sliding the uplink switch to
the right (MDI) position. When the switch is in this position, you cannot use
Port 16 as a station port. Figure 4-2 shows an example configuration.

If you cascade hubs, IEEE 802.3 standards suggest limiting the maximum chain
length to four hubs. However, physical restrictions depend on actual repeater
delay. Therefore, if all your hubs are from Compaq, you can cascade up to five
hubs for a maximum LAN size of 75 nodes (using ports 1~15 on each available
hub). However, you can configure a larger network if you use a star or
hierarchical star configuration as described under “Guidelines for Multiple Hub
Configuration.”

Figure 4-2.

Multiple Hub Configuration Using Uplink Port

Writer:

Chris Seiter

Configuring the Hub

Project:

Comments:

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4-3

: When using the uplink port to connect to another hub, use straight-through

NOTE

(normal) twisted-pair cable. This cable is the same as that used for connecting the

hub to a workstation. For more information, see Appendix B - Cable Pin

Assignments.

Using Crossover Twisted-Pair Cable

With a crossover twisted-pair cable, you can connect the 1017A/B hub to a
compatible hub using any available RJ-45 port. Note that you should not enable
the uplink function when you use a crossover cable to connect Port 16 to a
compatible hub.

Figure 4-3

. Multiple Hub Configuration Using a Crossover Cable

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Configuring the Hub

4-4

Backbone Connection

There are two trunk ports on the back panel to enable AUI and BNC
connections. You can use either type to link to an Ethernet backbone, depending
on the media type required.

Using the BNC Port

The 1017A/B hub can be stacked with other hubs using the BNC port on the
back panel. Through this port, you can connect hubs via thin coaxial cable
(10Base2). A Thin Ethernet segment can run up to 185 meters and connect up to
30 nodes. However, an Ethernet trunk can contain no more than three coaxial
segments (10Base2 or 10Base5) if each segment extends to the maximum
length (allowed for Thin or Thick Ethernet). To further extend the trunk line,
you can use fiber-optic cable.

Figure 4-4

. Cascading Hubs Using the BNC Port

Writer:

Chris Seiter

Configuring the Hub

Project:

Comments:

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4-5

Using the AUI Port

To connect to Thick Ethernet, attach a 10Base5 transceiver to the backbone, and
run an AUI drop cable between the the hub and the transceiver. A Thick
Ethernet segment can run up to 500 meters and connect up to 100 nodes.
However, an Ethernet trunk can contain no more than three coaxial segments
(10Base2 or 10Base5) if each segment extends up to the maximum length
(allowed for Thin or Thick Ethernet). To further extend the trunk line, you can
use fiber-optic cable.

To connect to thin Ethernet or a fiber-optic backbone, attach the appropriate
MAU converter to the AUI port (that is, AUI to 10Base2 or AUI to ST fiber
optic transceiver). Figure 4-5 shows a sample configuration using the AUI port
connection.

Figure 4-5

. Cascading Hubs Using the AUI Port Connection

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Configuring the Hub

4-6

Guidelines for Multiple Hub

Configurations

In a multiple hub configuration, the maximum limit between any two
workstations is five cable segments and four hubs based on IEEE 802.3
recommendations. For example, Figure 4-6 shows that if Workstation A sends a
message to Workstation B, there can only be up to four hubs in the path
between them. However, if all your hubs are from Compaq, the maximum limit
between two workstations is six cable segments and five hubs.

To control the number of hubs in a path, we recommend that you use one hub to
connect to several other hubs. By using a star configuration, you can link more
workstations together in a network than would be possible with a normal uplink
configuration. Also, be sure there is only one path between any two
workstations on the network to avoid corrupting data.

Figure 4-6.

Multiple Hub Configuration

Chris Seiter

Writer:

Project:

Configuring the Hub

Comments:

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A-1

Appendix A

Troubleshooting

Diagnosing Hub Indicators

You can easily monitor the 1017A/B 10Base-T Hub using its comprehensive
panel indicators. These indicators help you identify problems the hub may
encounter. This section describes common problems and possible solutions.

CPU

Symptom:
Cause: Defective CPU
Solution: Have the hub’s CPU replaced. Ask for dealer assistance.

Symptom: Port Partition indicator lights (yellow LED).

indicator displays a steady green light long after power on.

Causes:

a. Hub has partitioned 10Base-T (RJ-45), 10Base2 (BNC), or 10Base5

(AUI) port.
b. Workstation’s network adapter, cable or hub port is defective.
c. If BNC cabling is used, the BNC connector may not be terminated.

Solution:

a. If port partitioning has occurred, the hub automatically enables the

port when the faulty condition disappears.
b. The most common cause of disconnection from a network or port

partitioning is a defective network adapter or cable connection.

Check the corresponding cable connections, or the workstation’s

network adapter for possible defects. Replace the defective cable or

adapter.
c. If a BNC cable connection is used, be sure the open ends of the BNC

seg m e n t a r e p r o p e r l y t e r m i n a t e d with 50-ohm terminators.

: The BNC Partition LED also lights if the BNC port is not used (that is, no BNC

NOTE

cable connected). Ignore the BNC Partition LED if you did not connect a BNC cable.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Appendix A: Troubleshooting

A-2

System Diagnostics

Installation

Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning, test them in an alternate environment
where all the other components are functioning properly.

Cabling

1. Verify that the cabling type is correct. Be sure all cable connectors are

securely seated in the required ports. Straight-through cable should be
used for all standard twisted-pair connections.

2. When cascading two hubs using RJ-45 station ports at both ends of the

cable (that is, not the uplink port), be sure a crossover cable is used. You
should use crossover cable only if the uplink port is not available on
either hub.

3. When using Thin Ethernet cabling, be sure both ends are closed off with

4. Be sure all devices are connected to the network. Equipment may have

External Adapters

1. Be sure the network adapter cards installed in the workstations are in

2. Be sure the media transceivers are functioning properly and the SQE test

Configuration

If problems occur after altering the network configuration, restore the original
connections, and try to track the problem down by implementing the new
changes, one step at a time. Ensure that cable distances, repeater limits, and
other physical aspects of the installation do not exceed recommendations.

50-ohm terminators.

been unintentionally disconnected from the network.

good working condition.

has been disabled for all transceivers attached to the hub’s AUI port.

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A-3

Hub Integrity

As a last resort verify the hub’s integrity with a power-on reset. Turn the power
to the hub off and then on. If the problem still persists and you have completed
all the preceding diagnoses, then contact your Compaq Authorized Reseller for
further assistance.

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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+

B-1

Appendix B

Port and Cable Assignments

Figure B-1

4, 5, 7, 8 Not Used Not Used

Table B-1

. RJ-45 Connector (on the Hub Side)

Pin

1 Input Receive Data + Output Transmit Data +
2 Input Receive Data - Output Transmit Data ­3 Output Transmit Data + Input Receive Data +
6 Output Transmit Data - Input Receive Data -

. RJ-45 Pin Assignments

Assignment

(Port 1 ~ 16)

Assignment

(Daisy-Chain Port)

Schematics for both straight and crossover twisted-pair cable are shown below.

Straight-Through Crossover

(Hub) (Adapter) (Hub) (Hub)
1 IRD+ 1 OTD+ 1 IRD+ 1 IRD+
2 IRD- 2 OTD- 2 IRD- 2 IRD­3 OTD+ 3 IRD+ 3 OTD

3 OTD+

6 OTD- 6 IRD- 6 OTD- 6 OTD-

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Appendix B: Port and Cable Assignments

B-2

AUI Port

The following table shows pin assignments for the AUI port.

Pin Assignment

1 Collision In Shield

2 Collision In +

3 Data Out +

4 Data In Shield

5 Data In +

6 DC Power Common

9 Collision In -

10 Data Out -

11 Data Out Shield

Table B-2

12 Data In -

13 DC Power +

14 Power Shield

7, 8 ,15 No Connection

. AUI Pin Assignments

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C-1

Appendix C

Specifications

Product Specifications

Transmi ssi on Technique Baseband
Access Method CSMA/CD, 10 Mb/s
Standards Confor mance IEEE 802.3 10Base-T, 10Base2, 10Base5
Media Supported Category 3,4,5 twisted-pai r cabl e,

Thin or Thick Ethernet, or

fiber-optic Ethernet (via AUI transceiver)
Interfaces 16 RJ-45 ports, 1 BNC port, 1 AUI por t
Dimensions 43mm x 440mm x 116mm

(1.69"x 17.32" x 4.58")
Power Requirements Full range power input, 100 to 240V,

50/60 Hz, 20 watts max.
Temperature 0°C to 50°C (Standard Operating)
Humidi t y 5% to 95% (Noncondensing)
Certification CE Mark

Emi s s ions FCC Class A, VCCI Class 2, CISPR Class A
Immunity IEC 801-2,3,4, EN60555-2 Class A, EN60555-3
Safety UL, CSA, TÜV/GS

Network Specifications

Topology Tree (Backbone or Star)
Hub-to-Workstation Dist ance 100 meters maximum using twisted-pair cable
Number of Hubs Cascaded 5 (maximum, using all Compaq hubs)

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

Chris Seiter

Appendix C: Specifications

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D-1

Appendix D

Regulatory Standards

Compliance

EMI Warning

FCC Class A Certification
Compaq Computer Corporation
Model Number: 1017A/B

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference

that may cause undesired operation.

WARNING:

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

occur in a particular installation. If this equipment does cause harmful

interference to radio or television reception, which can be determined by

turning the equipment off and on, the user is encouraged to try to correct

the interference by one or more 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 the one

which the receiver is connected to

- Consult the dealer or an experienced radio/TV technician for help

You are cautioned that changes or modifications not expressly approved by the
party responsible for compliance could void your authority to operate the
equipment.

This equipment has been tested and found to comply with the

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

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Appendix D: Regulatory Standards Compliance

D-2

You may use unshielded twisted-pair (UTP) for RJ-45 connections. However,
use only shielded cable to connect I/O devices to this equipment via BNC
connection.

Warning:

• Wear an anti-static wrist strap or take other suitable measures to prevent

electrostatic discharge whenever handling this equipment.

• When connecting this hub to a power outlet, connect the field ground lead

on the tri-pole power plug to a valid earth ground line to prevent electrical
hazards.

The Interference Handbook

You may find the Interference Handbook prepared by the Federal
Communications Commission helpful. This booklet is available from the U.S.
Government Printing Office, Washington, D.C. 20402. Stock No. 004-000­00345-4.You can also view this document on the World Wide Web at the
following address:

www.fcc.gov/Bureaus/Compliance/WWW/tvibook.html

: In order to maintain compliance with the limits of a Class B digital device,

NOTE

Compaq requires that you use a quality interface cable when connecting to this

device. Changes or modifications not expressly approved by Compaq could void the

users authority to operate this equipment. Suggested cable type is:

• Twisted-pair for RJ-45 connections: 10Base-T

• Thin Ethernet (50 ohm) for BNC connections: 10Base2

• Thick Ethernet (D-type) for AUI connections: 10Base5

CE Mark Declaration of Conformance

This is to certify that this product complies with ISO/IEC Guide 22 and
EN45014. It conforms to the following specifications:

EMC: EN55022(1988)/CISPR-22(1985) class A
This product complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC.

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I-1

connection 2-8

Index

A

AUI

AUI/BNC backbone ports 2-4
Automatic partitioning 1-1
Automatic polarity detection 1-1

attaching 3-2
drop cable 2-8, 3-2, 4-5
port 1-1, 2-8, 3-2, 4-5
port connection 4-5

devices 2-8
segment 2-8
trunk 3-2, 4-4, 4-5

F

FCC standards 3-2
Fiber-optic

cabling 1-1, 3-2
connection 2-8
Ethernet cable 2-8

I

B

BNC

connections 4-4
monitor 2-5
port 1-1, 2-5, 2-6, 2-8, 3-2, 3-3,

4-4
port connection 2-8
T-type connector 3-2

C

Cable pin assignments 4-3
Cascading 1-1
Category 3 4-1
Coaxial

cable 2-8
segments 4-4, 4-5

Collision LEDs 2-4
CPU 2-3

E

Electrical specificat io n s 3-1
Ethernet 2-1, 2-8, 4-5
Ethernet

backbone 4-4
BNC trunk port 3-2
cable 2-8

IEEE 802.3

networks 2-1
recomm en dation s 4-6
specifications 2-1
standards 4-1, 4-2

Indicator panel 1-1

J

Jabber lockup protection 1-1
Jack connector 3-2

L

LAN, bandwidth 2-3
LED

display 2-4
indicator 3-3

indicator panel 2-2
Link indicator 3-4
Link/Traffic LED 2-5, 2-6

M

MAU converter 3-2, 4-5
MDI position 2-6
Multiple hub configuration 4-2

Writer:

Chris Seiter

Project:

Compaq Netelligent 1017A/B 10Base-T Hub User Guide

Index

Comments:

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I-2

Index

P

Partition LED 2-5
Power function 2-2

R

RJ-45

connectors 3-2
plug 3-3
port 1-1, 2-1, 2-4, 2-5, 2-6, 3-2,

3-3, 4-3

uplink port 4-1, 4-2

S

SQE test 3-3

T

Thick Ethernet 4-5

cable 2-8
segment 4-5
trunk 3-2

Thin Ethernet cable 2-8

segment 4-4

trunk 3-2
Traffic condition 2-6
Transceiver 1-1, 2-8, 3-2, 3-3, 4-5

BNC 2-8

optic 3-2
T-type connector 2-8
Twisted-pair cable 4-3

U

Utiliz ation LEDs 2-3, 2-4

V

Ventilation 3-1

Writer:

Chris Seiter

Project:

Index

Comments:

©1997 Compaq Computer Corporation.All rights reserved.
Compaq Registered U.S.Patent and Trademark Office.
Company and product names mentioned herein may be
trademarks and/or registered copyright and trademarks of
their respective companies.