AT&T StarLAN 10 Installation Manual

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©1990 AT&T

All Rights Reserved

Printed In USA

NOTICE

The information in this document is subject to change without notice.

AT&T assumes no responsibility for any errors that may appear in this document.

TRADEMARK NOTICE

StarGROUP is a trademark of AT&T.

WARNING: RISK OF ELECTRICAL SHOCK. EQUIPMENT MUST

BE PROPERLY GROUNDED.

Your AT&T equipment requires a properly grounded 3-prong AC power receptacle for safe operation. You should have your receptacle checked by a qualified electrician before connecting this equipment.

Do not cut or remove the third (ground) prong from the AT&T power cord. Do not use 2 wire extension cords or adapters to defeat the safety features of your equipment. If you have a 2-prong receptacle, it is very important to have it replaced with a 3-prong receptacle, installed by a qualified electrician.

WARNING

The equipment described here generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the installation manual, may cause interference to radio communications.

The equipment has been tested and found to comply with the Iimijs for a Class A computing device pursuant to Subpart J of Part 15 of FCC

Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment.

Operation of this equipment in a residential area is likely to cause interference to radio communications, in which case the user at his or her own expense will be required to correct this interference.

This digital apparatus does not exceed the Class A limits for radio noise emissions set out in the radio interference regulations of the

Canadian Department of Communications.

Le present appareil numerique n'emet pas de bruits radioelectriques depassant les limites applicables aux appareils numeriques de la classe A prescrites dans Ie Reglement sur Ie brouillage radioelectrique edicte par Ie ministere des Communications du Canada.

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TO ORDER ADDITIONAL COPIES OF THIS DOCUMENT

Contact: Your AT&T Account Team or

AT&T Customer Information Center, Commercial Sales

P.O. Box 19901

Indianapolis, Indiana 46219

In the U.S. call 1-800-432-6600

Outside the U.S. call 1-317-352-8557

Order: Document No. 999-100-722

UPDATES

AT&T can automatically provide you wijh updates to any StarLAN 10

Network document. "you wish to be included on the update list, call the AT&T Customer Information Center (CIC), ask to be placed on standing order, and indicate the documents by document number.

The document updates will be shipped to you as they are stocked by

CIC.

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Contents

About the Hub

Features of the Hub

What's In This Guide?

To Contact AT&T

Before You Install a Hub

Design Considerations

What's Supplied in a Hub Unit Kit?

What Else Do You Need?

Network Configurations

Hub Locations

Sample Network Configwations

19

20

21

Distance Guidelines for Connections to a Hub 30

Hub Placement

Placement Considerations

How to Mount a Hub

Power-Up LED Test

How to Label Hubs

Making Connections to a Hub

General Connection Rules

Connections to a Hub in a Room

Connections to a Hub in a Wiring Closet

47

47

51

57

Hub-ta-Hub Connection Between Wiring Closets 66

31

32

36

41

45

11

1;

14

16

7

9

1

3

Verifying Connections to the Hub 77

Interpreting Hub LEOs

Tr.ilficLED

Collision LED

AUI Jab LED

Link/Jab LEDs

79

82

84

86

88

Hub Pin Assignments

Glossary

91

93

Index 99

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About the Hub

A StarLAN 10 Network is a 10 Mbits/second CSMNCD local area network (LAN) that utilizes unshielded twisted-pair wire, transceiver (AUl) cable, and optical fiber to transmit network signals between hardware devices.

The Hub is a hardware device that enables you to directly connect up to 12 devices (including other Hubs), using twisted-pair wire modular cords (II devices) and transceiver cable

(I device), in a star configuration to form a StarLAN 10 Network.

In addition to connecting StarLAN 10 Network devices to the Hub, you can connect IEEE Standard 802.3 IOBASE5, Ethernet Version

2.0, and IOBASE2 Cheapemet DCE devices such as coaxial, broadband, and optical fiber transceivers, as shown in Figure I.

The Hub was developed with knowledge of and participation in the standard-setting process of IEEE 10BASE-T task force, whose charge is the development of standard specifications for

ANSI/lEEE 802.3 LANs that can use unshielded twisted-pair wire to carry 10 Mbits/sec network signals.

For information on the ANSI/lEEE Standard for Local Area

Networks 802.3, read the Carrier Sense Multiple Access with

Collision Detection (CSMAICD) Manual and Supplement published by the IEEE (Institute of Electrical and Electronics

Engineers, Inc.).

About the Hub 1

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2 About the Hub

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Features of the Hub

The Hub performs the following functions:

• Distributes Network Signals

The Hub allows you to connect up to 12 devices that are capable of transmitting and receiving network signals. Each

Hub has 10 modular IN jacks (labeled' '2" through' 'II' '), a switchable IN/OUT modular jack (labeled "I"), and an

Anachment Unit Interface (AUI) port (labeled "AUI"). All of these connectors are conveniently located on the front of the

Hub, as shown in Figure 2.

The IN jacks are used to connect StarLAN 10 Network hardware devices via modular cords. The switchable IN/OUT jack when set to the OUT position is used to interconnect Hubs via modular cords. The AUI port accepts a DeE

D-type connector to connect Ethernet-compatible devices

(transceivers) either directly or via transceiver (AUI) cable.

• Permits Network Expansion

Hubs can be interconnected using twisted-pair wire modular cords or via an alternate medium (that is, coaxial, broadband, or optical fiber).

• Permits Prewiring for Future Nodes

The Hub's IN jacks can be prewired to wall jacks at locations where nodes will be installed at a later date. This feature also allows nodes to be disconnected from, and reconnected to, wall jacks at any time without affecting the network.

About the Hub 3

AGURE 2 Hub Components

InllIut Switch

InlOut Jack

In Jacks -

AUI Port

IEC Power Connector d rI

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Collision LED

Link/Jab LEOs

Link Integrity

Option Switches

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4 About the Hub

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• Implements the IEEE Standard 802.3 Multiport Repeater

Specification

Regenerates Network Signals

The Hub regenerates network signals by retiming received data frames and regenerating them with the proper amplitude and pulse shape.

Isolates Jab Conditions

The advanced circuitry in the Hub isolates and prevents excessive consecutive collisions (collision storms) and continuous transmissions Gabber) caused by faulty nodes or wiring connections. If a collision storm or jabber condition is detected at a connector on the Hub, that connector is deactivated Gabbed), while the remainder of the network is undisturbed. The jabbed connector is reactivated automatically when the condition that caused the port to be isolated has been corrected. Each port on the Hub has a corresponding LED which is capable of indicating a jab

. condition. For more information onjab conditions, see

"AUI Jab LED" and "Link/Jab LEOs" in the "Interpreting

Hub LEOs" section later in this guide.

Detects and Displays Network Traffic and Collisions

The Hub detects the presence of network traffic and collisions. The Hub's traffic and collision LEOs are useful troubleshooting aids. For more information on traffic and collisions, see "Traffic LED" and "Collision LED" in the

"Interpreting Hub LEOs" section later in this guide.

Verifies Link Integrity

The Hub's Link Integrity feature can verify the integrity of the receive portion of the twisted-pair wire connection between each modular jack on the Hub and the twisted-pair device connected to that jack. This feature can be disabled on an individual jack basis to provide compatibility with devices that do not support Link Integrity. To enable or disable Link Integrity, use the Link Integrity option switch

(as described in the general connection rules in "Making

Connections to a Hub" later in this guide). There is one switch that corresponds to each modular jack (II switches and II modular jacks).

Aboutthe Hub 5

~ Important

The Link Integrity function of devices at both ends of the twisted-pair wire connection must agree. For example. if a jack on the Hub is connected via twisted-pair wire to a device that has Link Integrity enabled. Link Integrity must also be enabled on the Hub for that jack on the Hub. You must disable the Link Integrity on the Hub if the device connected to the modular jack is either not equipped with

Link Integrity or has its Link Integrity disabled.

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6 About the Hub

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What's In This Guide?

This guide explains how to install and troubleshoot the Hub.

It contains the following sections:

• Before You Install a Hub

This section explains what you receive in a Hub Unit Kit and what additional hardware you need in order to insla1l the Hub in your wiring environment.

It also discusses the design of your

StarLAN 10 Network.

• Network Configurations

This section explains the basic StarLAN 10 Network configurations that

are

possible using Hubs. It also provides illustrations of sample Hub configurations. In addition, this section provides a table of maximum distances between the

Hub and compatible components.

• Hub Placement

This section describes environmental. electrical, and space requirements for the Hub.

It also includes a procedure for testing the Hub's LEDs. and step-by-step procedures for mounting and labeling Hubs.

• Making Connections to a Hub

This section describes how to connect Hubs in a room or a wiring closet using a variety of connection media.

• Verifying Connections to the Hub

This section provides a procedure for verifying that the connections to the Hub's AU!

port and modular jacks are good.

• Interpreting Hub LEOs

This section describes how to use the Hub's LEDs to detect and isolate network problems.

• Hub Pin Assignments

This section provides pin assignments for modular jacks and the

AU!

port on the Hub. This information is helpful in troubleshooting networks comprised of equipment that has pin assignments different from those used in AT&T equipment.

About the Hub 7

• Glossary

This section explains technical teons for readers who are unfamiliar with communications wiring environments and local area networlcs.

8 About the Hub

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To Contact AT&T

For Help with Hub Problems

If you have a problem with your Hub. contact your networl< administrator. IT the problem persists. your networl< administrator can call a representative at the original place of purchase. IT you purchased the Hub from AT&T. have your network administrator call the AT&T National System Support Center hotline:

• In the United States and Puerto Rico. dial 1-800-922-0354.

• In Canada. dial 1-800-245-2480.

• In all other countries. call your authorized AT&T dealer.

For Product Information

For information about StarLAN 10 Networl< components and other

AT&T data networking products. call your AT&T Account

Executive or the AT&T Advertising Response Center:

• In the United States and Puerto Rico. dial 1-800-247-1212.

• In Canada. dial 1-800-361-7951.

• In all other countries. call your authorized AT&T dealer.

For Design or Installation Service

The AT&T Customer Programming Services Center provides a full range of services including:

• Detailed review of your networking needs

• Network design

• Installation of the StarLAN 10 Networl< in non-standard and non-AT&T wiring environments

For more information about the AT&T Customer Programming

Services Center. contact your AT&T Account Executive or the

AT&T Advertising Response Center.

For information on installing a StarLAN 10 Networl< in standard

AT&T wiring environments. call a representative at the original place of purchase. IT you purchased the StarLAN 10 Network from

AT&T. contact your AT&T Account Executive.

About the Hub 9

Before You Install a Hub

Before installing a Hub, you should verify the contents of the Hub

Unit Kit and detennine what, if any, additional hardware is required to install the Hub. You also should contact your network administrator for a copy of the network configuration design and for any additional hardware required for the installation.

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Design Considerations

To ensure proper installation of the StarLAN 10 Network, you should have a network configuration design that specifies all of the components to be installed in each room and wiring closet (if applicable). The StarLAN 10 Network Hub Unit Design Form, shown on the next page, is used to identify the hardware devices to be connected to a Hub.

If you don't have a network configuration design, it is important for you to realize that there are maximum distance and delay guidelines associated with a StarLAN 10 Network. Your network must confonn to these distance and delay guidelines.

If you are installing a StarLAN 10 Network that will use the building's existing twisted-pair wiring, you also should have a basic understanding of the wiring environment in which you intend to install components.

For infonnation about StarLAN 10 Network configurations, read the "Network Configurations" section in this guide or refer to the

StarLAN 10 Network Hardware Design Guide.

Before You Install a Hub 11

What's Supplied in a Hub Unit Kit?

The Hub Unit Kit. illustrated in Figure 3. contains the following components: a AHub b A bracket for mounting the Hub on the wall

C Four wall anchor.; for mounting the Hub on wallboard d Four No.8 X I-inch (2.5 centimeter) panhead sheet-metal screws to hold the bracket on the wall e A UL/CSA listed SIT-type power cable for connecting the

Hub's internal power supply to commercial power

If any of the items are missing or damaged. return the kit to the original place of purchase.

14 Before You Install a Hub

FIGURE 3 Hub Unit Kit

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B8for8 You Install a Hub 15

What Else Do You Need?

Based on the network configuration you intend to install. and the type of wiring environment you are working in. you may need one or more of the cords listed in Table I.

TABLE 1 Modular Cords and Cables for Hub Connections

Type

D8W

Lengths Environments

2.5 ft.

(76 em) Hub to Hub, or Hub to wiring closet cross connect

DW8A-DE

DW8A-SE

10 ft.

(3.0 m)

25 ft.

(7.6 m)

50 ft. (15.2 m)

75 ft. (22.8 m)

100 ft. (30.5 m)

150 ft. (45.7 m)

200 ft.

(60.9 m)

10 ft.

(3.0 m)

25 ft.

(7.6 m)

50 ft. (15.2 m)

Hub to node. Hub to

Hub. or Hub to wiring closet cross connect

Hub to 66-type wiring closet cross connect

DP8B-DE

(plenum cord)

AU!

10 ft.

25 ft.

(3.0 m)

(7.6 m)

50 ft. (15.2 m)

75 ft. (22.8 m)

100 ft. (30.5 m)

150 ft. (45.7 m)

200 ft. (60.9 m) transceiver 100 ft. (30.0 m) cable

33 ft.

(10.0 m)

165 ft. (50.0 m)

Hub to node, Hub to

Hub, or Hub to wiring closet cross connect through plenums.

(plenum cord is a fire resistant, low smoke producing cord for use in ceiling/wall locations.)

Hub to Ethernet transceiver

16 Before You Install a Hub

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Your installation also may require one or more of the following:

• 356A Adapter (11O-type wiring closet)-used to connect modular cords to a 25-pair cable.

• 451A Adapter (Hub to node)-used to join two modular cords.

• Fiber Adapter (Hub to Hub)- used to connect modular cord to optical fiber.

• Power strip---used to connect more than one Hub to a single electrical receptacle.

• A UL/CSA listed SIT-type extension cord to connect a Hub to an electrical receptacle that is more than 7 feet away from the

Hub.

• If

you intend to access commercial power via a 220 volt outlet, you must purchase and use a UL/CSA listed 220 volt power cord of the appropriate length, type SIT, 3 conductor, 18 AWG, configured for NEMA6-15.

• Rack mounting bracket--used to mount multiple Hubs, Fiber

Adapters, and Fiber Hubs.

If

you do not have the appropriate hardware for your installation, have your network administrator call your AT&T Account

Executive or the AT&T Advertising Response Center.

Before You Install a Hub 17

Network Configurations

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The Hub is compatible with all StarLAN 10 Network components.

The Hub supports a variety of industry standard IEEE 802.3

IOBASE5, Ethernet, and IOBASE2 Cheapernet DCE devices such as coaxial, broadband, and optical fiber transceivers. The Hub also supports the IOBASE-T standard specifications currently being developed by the IEEE IOBASE-T task force for ANSlIIEEE 802.3

LANs utilizing unshielded twisted-pair wire media at a IOMbit/sec transmission rate.

All StarLAN 10 Networks, regardless of their size, are installed in a star or multiple-star configuration. In a StarLAN 10 Network with more than one Hub, each Hub is considered a peer (there is no hierarchy relative to the distribution of traffic over the network).

However, when you install a StarLAN 10 Network that uses building wire, that building wire typically is installed in a hierarchical fashion (that is, rooms are wired to satellite wiring closets, which are in tum wired to an equipment room). In such cases, it is important to understand that any resulting hierarchical configuration of the StarLAN 10 Network is due to the physical arrangement of the building wire.

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Network Configurations 19

Hub Locations

You can install a Hub in a room or a wiring closet:

• If you are supporting a small networlc (confined to a room) or if there are more devices in the room than available wall jacks, you should install the Hub in the room.

• If you are supporting a larger network (distributed throughout a floor or a building), you should install the Hubs in wiring closets.

When you install a Hub in a room, you directly connect a device to the Hub using a modular cord or a transceiver (AUI) cable.

When you install a Hub in a wiring closet. you connect a device to the Hub using a combination of media: modular cords, building twisted-pair wires. optical fiber, or transceiver (AUI) cable.

Typical room and wiring closet configurations are discussed in the next section, •• Sample Networlc Configurations."

20 Hub Configurations

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Sample Network Configurations

This section contains sample StarLAN 10 Networlc configurations.

Each configuration is subject to maximum distance and delay guidelines that must be observed in order for the network to function properly.

The following sections contain information about maximum distance and delay guidelines:

• For information on maximum distances between various devices connected to a Hub. see the "Distance Guidelines for

Connections to a Hub" section in this guide.

• For information on the maximum distances and delay guidelines for StarLAN 10 Networlcs in general, see the

StarLAN 10 Network Hardware Design Guide.

)

Network Configurations 21

Single Room Configuration

In a room configuration, StarLAN 10 Networlc devices are connected directly to one or more Hubs using modular cords, as shown in Figure 4.

An Ethernet transceiver can also be connected to a Hub via transceiver (AUI) cable.

Hubs should be located in the room wherever it is convenient for routing modular cords and accessing an electrical outlet

FIGURE 4 Single Room Configuration

Hub

22 Hub Configurations

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Wiring Closet Supporting Single or Multiple

Rooms Configuration

In this configuration, one or more Hubs are mounted in a wiring closet The Hubs are connected to twisted-pair wires at the cross connects in the wiring closet, which are in tum connected to wall jacks in one or more rooms. StarLAN 10 Network devices then are connected to the wall jacks using modular cords. Figure 5 illustrates this type of configuration.

FIGURE 5 Wiring Closet to Multiple Rooms Configuration

Room

Wiring Closet

Room

356A

Adapter

I

Cross

Connects

Network Configurations 23

Hub in a Wiring Closet Supporting Hub in a

Room Configuration

This configuration is similar to the previous configuration, except the number of StarLAN 10 Networlc devices to be connected exceeds the number of wall jacks available in the room.

In this case, a Hub is installed in the wiring closet and is connected through a wall jack to another Hub installed in the room. The Hub installed in the room provides connections for up to II other

StarLAN 10 Network devices (including other Hubs). Figure 6 illustrates this type of configuration.

FIGURE 6 Wiring Closet to Hub in a Room COnfiguration

Wiring Closet Room

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•

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24 Hub Configurations

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Multiple Wiring Closet Configuration

In this configuration. Hubs installed in wiring closets (that provide service to different areas or floors of the building) are connected together using building wire and/or optical fiber to create a singIebuilding-wide StarLAN IO Network, as shown in Figure 7.

Optical fiber is an ideal medium for interconnecting Hubs in different wiring closets- offering both increased working distances and network transmissions free of electrical noise generated by other devices in the building. When connecting Hubs via optical fiber, a StarLAN IO Network Fiber Adapter is required for each Hub-to-optical fiber pair, as shown in Figure 8.

Network Configurations 25

FIGURE 7 MUltiple Wiring Closet Configuration

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26 Hub Configurations

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FIGURE 8 Multiple Wiring Closet Configuration Using Optical

Fiber

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Networl< Configurations 27

Building-to-Building Configuration

In this configuration. Hubs installed in wiring closets of different buildings are connected together using optical fiber to fonn a building-to-building StarLAN IO Networlc. This configuration requires a StarLAN IO Networlc Fiber Adapter for each Hub-tooptical fiber pair connection.

Figure 9 illustrates this type of configuration.

28 Hub Configurations

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Network Configurations 29

Distance Guidelines for Connections to a Hub

Regardless of the network configuration you choose, whenever you connect a device to a Hub. certain distance guidelines must be observed. These guidelines vary according to the type of device being connected and the connection medium being used.

Table 2 provides maximum distances for connections between a

Hub and various other devices.

TABLE 2 Wire and Transceiver Cable Distance Guidelines

Medium Connection

Wire

Wire

Wire

Wire

Wire

Hub-to-NAU

Hub-to-Hub

Hub-to-AUI

Adapter

Hub-to-Coax

Adapter

Hub-to-Bridge

Wire Hub-to-Fiber

Adapter

Transceiver Hub-to-

(AUI) Cable Ethernet

Transceiver

Feet

328*

328*

328*

Distance

Meters

100*

100*

100*

328*

328*

49

164

100*

100*

15

50

• Distance includes Hub·lO·Cross CmneCl Field(s)

30 Huli.Configuralions

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Hub Placement

)

You can set a Hub (horirontally) on a level surface (for example. a table top. a fl1ing cabinet, or a desk top) or mount it (verticaIly) on a waIl.

Before placing a Hub in a room or wiring closet. you must determine if the environmental. electrical. and space requirements for the Hub are satisfied.

Hub Placement 31

Placement Considerations

You can place one or more Hubs in rooms or wiring closets that satisfy the conditions described in the following steps:

1 Determine whether the operational environment for the Hub meets the following specifications:

Temperature:

Humidity:

Altitude: o to 50 °C

32 to 122 of

5% to 95% NC o to 10.000 feet o to 3.017 meters

~ Note

Where the operational environment differs significantly from the environment in which the Hub was stored. wait at least two hours before installing the Hub. ...

32 Hub Placement

)

)

2 Be sure there is a commercial power receptacle within a 7-foot

(2.2-meter) cord distance of the Hub. If there is no convenient location within 7 feet (2.2 meters) of a receptacle. use a power strip or grounded extension cord to extend the range of your power cable.

The power requirements for a Hub

are:

Voltage:

Frequency:

Power:

85 to 250 VAC

47 to 63Hz

35W

The power receptacle must be a non-switched. 3-pronged.

grounded receptacle. There

are

no voltage switches on the

Hub. It operates continuously from 85 to 250 VAC.

• WarnIngs

a Do not use a 3-to-2-pronged adapter at the receptacle; use of this type of adapter may result in electrical shock and/or damage to the Hub.

b The detachable power cable shipped with the Hub Unit Kit is rated only 125 VAC. If you intend to access commercial power via a 220 volt outlet. you must purchase and use a

UL/CSA listed 220 volt power cable. type SIT. 3 conductor.

18 AWG. configured forNEMA6-I5 .....

Hub Placement 33

3 Be sure to allocate enough space for

• the Hub. A Hub's dimensions, including the mounting bracket, are:

16.5 inches (42 centimeters) in height

3 inches (8 centimeters) in width

7 inches (18 centimeters) in depth

• the cords that will be connected to the Hub (including the power cable).

• air circulation.

When you mount a Hub on the wall, allow 5 inches (12 centimeters) of clearance between the top of a Hub and any other object.

When you set a Hub on a level surface, allow 5 inches

(12 centimeters) of clearance between the Hub and any object positioned over the Hub. Never place an object directly on top of the Hub.

If you are installing more than one Hub in the same location, it is a good idea to locate Hubs close to one another to simplify administration and troubleshooting tasks, as shown in Figure 10.

If you are mounting multiple StarLAN 10 Network wiring devices within a closet, you may want to consider rack mounting them.

~

Do

Note not stack Hubs on top of each other. Stacking will affect the heat dissipation capabilities of the Hubs.

~

The next section describes a procedure for mounting a Hub on a wall in a room or wiring closet.

If you are not mounting your Hub on the wall, simply follow Steps 6, 7, and 8 of the following procedure.

34 Hub Placement

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FIGURE 10 Collocating Hubs In a Room or Wiring Closet

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Hub Placement 35

How to Mount a Hub

The following procedure describes how to mount a Hub onto wallboard or wood (a stud. heavy wooden paneling. etc.) using the hardware provided in the Hub Unit Kit.

If you are mounting a Hub on a wall other than the types mentioned above (for example. a masonry wall). you may need additional mounting hardware.

To mount a Hub. the only tools you need are a flat-blade screwdriver and a drill with a 3/16-inch bit (when mounting onto wallboard) or a liS-inch bit (when mounting onto wood).

If you are not mounting your Hub on a wall (that is. it will sit on a level surface). skip ahead to Step 6 of this procedure.

To mount a Hub. follow these steps:

1 Slide the mounting bracket out of the Hub. as shown in

Figure II.

FIGURE 11 Removing the Bracket from the Hub

•

36 Hub Placement

)

)

2 Position the bracket on the wall, and carefully mark the location for each screw with a pencil. The bracket can be mounted with either end up.

3 Mount the bracket, as shown in Figure 12.

• If you are mounting the bracket onto wallboard between studs: a Drill four holes for the wall anchors, using a 3/16-inch bit.

b Insert the wall anchors and lightly tap them into place until they are flush with the wall.

e Position the mounting bracket on the wall so that the four holes in the bracket line up with the anchors you have inserted.

d Insert the sheet-metal screws through the holes in the mounting bracket and into the wall anchors.

e Screw the mounting bracket onto the wall.

• If you are mounting the bracket onto wood: a Drill four holes for the sheet-metal screws, using a 1/8inch bit.

b Position the mounting bracket on the wall so that the four holes in the bracket line up with the holes you have drilled.

e Insert the sheet-metal screws through the holes in the mounting bracket and into the drilled holes.

d Screw the mounting bracket onto the wall.

Hub Placement 37

FIGURE 12 MountIng the Bracket

0

0

OJ OJ

(Wall anchors for wallboard mounting only)

6-

--' OJ e -- OJ

4 Place the Hub finnly against the wall so that the mounting bracket fits into the slots on the back of the Hub.

38 Hub Placement

)

)

5 Slide the Hub down on the bracket, as shown in Figure 13, until it locks into place.

FIGURE 13 Placing the Hub on the Bracket

I

I

I

I

I

I II

--

III II 11

.., 0 II

I v

-.,.

n

I

I

U

I

I

I

I

I

I

~

III 0 J

I ill ~ 11

.......... II

.....

I

I

I

Hub Placement 39

6 Connect the power cable to the 3-prong lEC power connector on the front of the Hub, as shown in Figure 14.

FIGURE 14 COnnecting the Power cable

7 Insert the other end of the power cable into a grounded outlet on the wall, a power strip, or a grounded extension cord.

~ Warning

Do not use a 3-to-2-pronged adapter at the outlet; use of this type of adapter may result in electrical shock and/or damage to the Hub.....

8 Repeat Steps 1 through 8 for each Hub to be mounted (Steps 6 through 8 for freestanding Hubs).

Once the Hubs are properly placed in the room or wiring closet, you should perform the power-up LED test in the next section.

40 Hub Placement

)

Power-Up LED Test

Once the Hub is mounted, you should verify that its LEDs are functioning properly by using the procedure in this section. Figure

15 illustrates all of the LEDs on the Hub.

FIGURE 15 Hub LEOs

[

~

..

..

..

..

..

·

·

-

.

·

'I

._1

"".

.!.L

~

..

..

-,

-,

-

"

•

..

..

..

..

-

.

-

.

-.

· -

.

"~

l,

-

Traffic LEO

Collision LEO link/Jab LEOs

AUI Jab LEO

Hub Placement 41

Procedure

To verify that the Hub's LEDs are functioning properly, follow these steps:

1 Remove the power cable from the Hub.

2 Plug the power cable back into the Hub and observe the LED activity on the Hub:

a

For approximately two seconds after power is initially applied, the following LED activity should occur.

LED LED Slale

Traffic OFF

Collision ON

Link/Jab ON RED

AUIJab ON b After two seconds, the LEDs should return to their normal states.

LED LED Slale

Traffic ON

Collision OFF

Link/Jab OFF

(ON AMBER if Link

Integrity is disabled)

AUIJab OFF

~ Note

If you are running this test with any of the twisted-pair wire jacks connected, the status of the Link/Jab LED may vary.

Therefore, it is recommended that you disconnect all jacks before performing the power-up LED test ....

42 Hub Placemenl

)

)

If all LEOs followed the described sequence, then the Hub's

LEOs are operating properly.

If there is a deviation from the described sequence, proceed as follows depending on the deviation:

• If all LEOs remained OFF, determine whether the power source is functioning by plugging another device into the receptacle. Then do one of the following:

If the receptacle is not providing power, plug the

Hub into another receptacle known to have power.

If the receptacle is providing power and all of the

Hub's LEOs remain OFF, check the connection between the Hub and the power receptacle by following these steps: a Unplug the Hub from the receptacle.

b Oisconnect the female connector on the power cable from the IEC Power Connector on the front of the Hub.

eRe-insert the female connector into the IEC

Power Connector.

d Plug the Hub into the receptacle.

If all of the LEOs remain OFF. either the Hub or the power cable is not operating properly.

Contact a representative at the original place of purchase or a Service Technician.

Hub Placement 43

• If there are any other deviations from the power-up sequence in Step 2b. return the Hub to the original place of purchase.

If you purchased your Hub from

AT&T:

In the United States and Puerto Rico. call the toll-free AT&T National System Support Center hotline at 1-800-922-0354.

In Canada, call the toll-free AT&T Canada, Inc.

hotline at 1-800-387-0913.

In all other countries, call your authorized AT&T dealer.

Now that you've completed the power-up test successfully, proceed to the next section, "How to Label Hubs."

•

44 Hub Placement

)

)

How to Label Hubs

You should label all Hubs in a StarLAN 10 Network to simplify the tasks of administration and troubleshooting.

The Hub to which all other Hubs in a room or wiring closet are connected is called a primary Hub. All Hubs connected to a primary Hub within the same room or wiring closet are called secondary Hubs.

~ Note

The StarLAN 10 Network Hub Unit Design Form, included in the

"Before You Install a Hub" section of this guide, should be maintained to identify the destination of each connection to the

Hub.....

To label one or more Hubs in a room or a wiring closet, follow these steps:

1 Label the primary Hub (to which all other Hubs in the room or wiring closet will be connected) as "Hub I."

2 Label all secondary Hubs in the room or wiring closet as "Hub

2" with extensions in sequential order. For example, the first secondary Hub should be labeled "Hub 2-1 " the second secondary Hub should be labeled "Hub 2-2," etc., as shown in

Figure 16.

Hub Placement 45

FIGURE 16 labeling Hubs

Hub 2-3 Hub 2-1 Hub 2-2

!

""'r "!'"

..

..

..

..

..

~

•

•

•

0

..

""'i

•

•

•

•

•

..

..

•

0

..

•

• ..

•

•

•

•

•

•

•

0

~ ~

" -

~

Hub 1

'i

•

••

••

•

••

0

~

" -

PRIMARY

HUB

SECONOARY

HUBS

46 Hub Placement

Making Connections to a Hub

)

Each Hub has II modular (RJ45) jacks and one AUt port. The jacks labeled' '2" through' 'II " are permanently configured as IN jacks, and the jack labeled' 'I " is a switchable IN/OUT jack.

This section describes how to make connections to a Hub in a room or a wiring closet to form a StarLAN 10 Network. Before making any connections to a Hub or any other StarLAN 10 Network device, you should read the "General Connection Rules" section that follows.

Once you have completed making connections to the Hub, test the network traffic movement through the Hub by following the procedure in "Verifying Connections to the Hub" later in this guide.

General Connection Rules

The following connection rules apply to all StarLAN 10 Network configurations:

• When you connect a transceiver (AUI) cable to a Hub's AUI port, you must connect the DCE D-type male connector of the transceiver cable to the DTE D-type female connector on the

Hub.

• When connecting two devices together using twisted-pair wire, you must connect the OUT jack of one device to the IN jack of the other device.

Certain StarLAN 10 Network hardware devices (such as the

Hub, the Coax Adapter, the Fiber Hub, and the Fiber Adapter) have switchable IN/OUT jacks. When connecting a modular cord to an IN/OUT jack, you must check the position of the

IN/OUT switch to verify that the IN to OUT connection rule is obeyed.

Making Connections to a Hub 47

To set the IN/OUT switch on a mounted Hub to the OUT position, push the switch up, as shown in Figure IS.

FIGURE 17 setting the IN/OUT Switch on a Hub

"",,""'

~=~

~ ....

T

• The Link Integrity option switches are set to enable by default, as shown in Figure 18. When connecting using twisted-pair wire, you must make sure that the Hub's Link Integrity function is set appropriately.

Certain devices do not support Link Integrity. If you connect the Hub to a device that does not support Link Integrity, you must make sure that the Link Integrity function is disabled for that jack on the Hub. If you connect the Hub to a device that supports Link Integrity, and the device has the Link Integrity function enabled, you must make sure that the function is enabled for that jack on the Hub.

48 Making Connections to a Hub

I

•

FIGURE 18 Link Integrity Option Switch

Enabled link

Integrity Option

Switch

)

)

If the Link/Iab LED is ON GREEN, the receive portion of the link between the Hub and the connected device is good.

If it is

OFF, there is a problem with the connection.

Making Connections to a Hub 49

• When you are connecting more than two Hubs in the same room, select a Hub to serve as the primary Hub for this room

(the Hub to which all other Hubs in the room will be connected), as shown in Figure 19. This will minimize the number of Hubs in anyone path (end-to-end connection) on the networlc.

RGURE 19 Connecting More Than Two Hubs In a Room

~

I

!

~

/f1 A1 Ai

~ o

UT :

J ack

..

..

..

..

..

OUT :

Jack

D

..

..

..

..

..

..

D

OUT :

Jack

..

..

..

..

D

~ ~

~

~

~

~ ..

~ PRIMARY

HUB

....

....

......

D

]]-IN Jacks

~

' - -

SECONOARY

HUBS

)

"

~.,

/

•

50 Making Connections to a Hub

Connections to a Hub in a Room

A Hub installed in a room can support connections to the following:

• StarLAN 10 Network nodes located in the room (using modular cords)

• an Ethernet transceiver in the room (using transceiver cable)

• other Hubs in that room (using modular cords)

• a Hub in a wiring closet (using modular cords)

The procedures in this section describe connections between a Hub in a room and a StarLAN 10 Network node, an Ethernet transceiver, and another Hub located in the same room.

For information on connecting a Hub in a room to a Hub in a wiring closet, see "Hub-to-Hub Connection (Wiring Ooset to Room)" later in this section.

)

Making Connections to a Hub 51

Node-to-Hub Connection (Room)

To connect a StarLAN 10 Network node to a these steps:

Hub in a room, follow

1 Select the appropriate length DW8A-DE modular cord for the connection.

2 Connect one end of the modular cord to the OUT jack on the hardware device (for example, a PC NAU) you are connecting to the Hub as shown in Figure 20.

3 Route the free end of the modular cord to the area where the

Hub is located.

4 Connect the free end of the modular cord to

Hub.

an IN jack on the

~ Note

If possible, reserve the switchabIe IN/OUT jack on the Hub for a connection to another Hub. ....

5 Make sure that the Link Integrity setting for the modular jack on the Hub agrees with that of the node.

)

•

•

52 Making Connections to a Hub

FIGURE 20 Node-Io-Hub Connection (Room)

..

..

..

..

..

..

~

..

..

..

..

O·

I

OWBA-OE ~~'''''' rn

C)

=

OUT Jack --

"'-....

II

==

Ethernet Transceiver-to-Hub Connection (Room)

To connect an Ethernet transceiver to a Hub in a room, follow these steps:

1 Select the appropriate length transceiver (AUI) cable for the connection.

2 Be sure the SQE (Signal Quality Error) test function on the transceiver is disabled.

For information on how to disable the

SQE test function, see the transceiver documentation.

~ Note

If you enable the SQE test function, a high number of collisions will occur....

Making Connections to a Hub 53

3 Connect the female end of the transceiver cable to the the Ethemettransceiver as shown in Figure 21.

port on

4 Route the free end of the transceiver cable to the area where the

Hub is located.

5 Connect the male end of the transceiver cable to the A VI on the Hub.

port

FIGURE 21 Ethernet Transcelver-to-Hub Connection (Room)

i

:

• Transceiver

..

Cable

•

:

••

~H+----

~~

II!

AU I Port c:

::J.

" " Ethernet

Transceiver

Coaxial

Cable

)

•

54 Making Connections to a Hub

Hub-to-Hub Connection (Room)

To connect one Hub (Hub A) to a second Hub (Hub B) in the same room, follow these steps:

1 Set the IN/OUT switch on Hub B to the OUT position as shown in Figure 17.

2 Make sure that the Link Integrity settings for the modular jacks on both Hubs agree.

3 Select the appropriate length of modular cord (DW8A-DE or

D8W) for the Hub-to-Hub connection.

4 Connect one end of the modular cord to the IN/OUT jack of

Hub B as shown in Figure 22.

5 Route the free end of the modular cord to the area where Hub A is located.

6 Connect the free end of the modular cord to an IN jack on

HubA.

~ Note

Remember, when connecting two or more Hubs in the same room, it is important to minimize the number of Hubs in anyone path

(end-to-end connection) on the network. For information on how you might minimize the number of Hubs in a path, read the

"General Connection Rules" section earlier in this guide.....

Making Connections to a Hub 55

FIGURE 22 Hub-la-Hub Connection (Room)

Hub A

TIl

"--H,,I-INJack

•

••

:

•

PRIMARY

•• •

D

~L

HUB

Hub B

~=-

~ll

' - + - < " 1 - OUT Jack

•

:

••

•

•

SECONDARY

•

•

•

D

HUB

~

)

)

56 Making Connections to a Hub

Connections to a Hub in a Wiring Closet

A Hub installed in a wiring closet can support connections to the following:

• wall jacks in rooms (using building twisted-pair wire)

• a Hub located in a room (using building twisted-pair wire)

• an Ethernet transceiver (using transceiver cable)

• Hubs installed in the same wiring closet (using modular cords)

• a Hub located in another wiring closet (using building twistedpair wire or optical fiber)

• a Hub located in a wiring closet in another building (using optical fiber)

This section contains the procedures for connecting a Hub in a wiring closet to a room wall jack and to a Hub in a room.

The procedures for connecting devices (an Ethernet transceiver or multiple Hubs) to a Hub within that wiring closet are the same as for connecting them in a room. The following sections contain information on connecting devices:

• For information on connecting an Ethernet transceiver to a Hub in a wiring closet, read the "Ethernet Transceiver-to-Hub

Connection (Room)" section earlier in this guide.

• For information on connecting a Hub to another Hub in the same wiring closet, read the "Hub-to-Hub Connection (Room)" section earlier in this guide.

Instructions for making Hub-to-Hub connections between wiring closets will be provided later in this guide.

~

If

Note you are not familiar with wiring closet connections or do not feel comfortable attempting such connections, it is recommended that you retain the services of an AT&T technician or other similarly qualified professional. For installation service information, read the "To Contact AT&T" section in the beginning of this guide.....

Making Connections to a Hub 57

Before making any of these wiring closet connections, you must know what type of wiring closet hardware and associated wiring is being used in the building. To determine what type of wiring is in the building, read the next section, "Identifying the Building's

Wiring Environment."

After you have determined the type of wiring environment the building has, turn to the appropriate procedure to connect each you are installing.

Hub

Identifying the BUilding's Wiring Environment

Each StarLAN 10 Network hardware device you connect using the building twisted-pair wire requires two pairs of wires: one pair to transmit network signals and one pair to receive network signals.

In a 4-pair cable or a 25-pair cable with 4-pair groups, pairs 2 and 3 are used.

Your wiring closet will contain one of the two possible types of cross connects: llO-type cross connects or 66-type cross connects

(shown in Figure 23).

)

•

)

)

58 Making Connections to a Hub

FIGURE 23 IdentifyIng Cross COnnects

110-type 66-type

If your wiring closet is equipped with I IO-type cross connects, it is called a "Premises Distribution System" (PDS).

If your wiring closet is equipped with 66-type cross connects, it is either a tip/ring wiring environment or a lA-Key wiring environment, depending on the type of telephone equipment in your building.

If your building is a tip/ring wiring environment, you can identify the unused pairs (the twisted-pair used to complete the connection between the Hub and a wall jack or another cross connect) on the

66-type cross connect by the color codes in Table 3.

Making Connections to a Hub 59

TABLE 3 Color and Function of Pairs In a 25-Palr Cable

(Tip/Ring Environment)

DW8A·SE Cord

Color

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

25-Palr Station Cable

Group Color

!

W-BL

BL-W

WOO

O-W

W-G

G-W

W-BR

BR-W

2

3

W-S

SoW

R-BL

BL-R

R-O

O-R

R-G

G-R

Tip

Ring

OD!

002

ID!

ID2

Power

Power

R-BR

BR-R

Tip

Ring

R-S

S-R

OD!

002

BK-BL ID!

BL-BK ID2

BK-O

O-BK

Power

Power

Function'

Tip

Ring

OD!

002

ID!

ID2

Power

Power

• 00 stands for Out Data. 001 and 002 are the transmit pair. ID stands for In

Data.

lOt and ID2 are the receive pair.

)

60 Making Connections to a Hub

)

)

TABLE 3 Color and Function of Pairs In a 25-Palr Cable

(Tip/Ring Environment) (continued)

DW8A·SE Cord

Color

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

25·Palr Station Cable

Group Color

4

Function·

BK-G Tip

G-BK Ring

BK-BR OD!

BR-BK OD2

BK-S 101

S-BK

Y-BL

BL-Y

102

Power

Power

5

Y-O

O-Y

Y-G

G-Y

Y-BR

BR-Y

Y-S

Soy

Tip

Ring

OD!

002

101

102

Power

Power

6 V-BL

BL-V

V-O

O-V

V-G

G-V

V-BR

BR-V

V-S

S-V

Tip

Ring

OD!

002

101

102

Power

Power

Spare

Spare

• 00 stands for Out Data. 001 and 002 are the transmit pair. ID stands for In

Data. IDl and 102 are the receive pair.

Making Connections to a Hub 61

If your building is a lA-Key wiring envirorunent, you can identify the unused pairs (the twisted-pair used to complete the connection between the Hub and a wall jack or another cross connect) on the

66-type cross connect by the color codes in Table 4.

~ Note

Pairs 23, 24, and 25 are used in conjunction with a 149B Adapter; all other types of connections (that is, PC/lA-Key Adapter and

Armiger Adapter) use pairs 16, 17,21 and 22....

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

Color

WoO

O-W

W-G

G-W

WoO

O-W

W-G

G-W

TABLE 4 Color and Function of Pairs In a 25-Palr cable

(1 A-Key Environment)

DW8A-SE Cord 25-Palr Station Cable

Pair Color Function·

23,24 V-G

G-V

OD!

OD2

V-BR 101

BR-V 102

24,25 V-BR OD!

BR-V OD2

V-S

S-V

101

102

23,25 V-G

G-V

V-S

S-V

OD!

OD2

101

102

16,17 Y-BL OD1

BL-Y OD2

Y-O

O-Y

101

102

21,22 V-BL OD!

BL-V 002

V-O

O-V

101

102

• 00 stands for Out Data 001 and OD2 are the ttansmit pair. ID stands for In

Data. IOl and ID2 are the receive pair.

)

)

62 Making Connections to a Hub

Hub-to-Wall Jack Connection (Wiring Closet)

You can connect a Hub in a 66-type or ItO-type wiring closet to room wall jacks.

To connect a modular wall jack in a room to a Hub in a wiring closet, you must connect the appropriate cross connects in the closet to one of the Hub's IN jacks:

• If this closet contains ItO-type wiring, use a DW8A-DE modular cord to connect the IN jack of the Hub to a 356A

Adapter that, in tum, is connected to the appropriate pairs of wires on the wiring block in the purple field.

Then connect the same wire pairs on the purple field to the wire pairs on the blue field that lead to the room's wall jack with either a 2-pair or 3-pair patch cord (see Figure 24).

FIGURE 24 Hub to 11o-type Cross Connect

IN Jack

~

••

0

••

•

•

•

•

•

•

•

DW8A·DE

3S6A 2S·palr

/ Adapter Station

Cable

/

4-pair Cord or

2S-pair

Station Cable

•

~I __

To Room's

Wall Jack

Purple Field Blue Field

Making Connections to a Hub 63

• If this closet contains 66-type wiring, use a DW8A-SE modular cord to connect the IN jack of the Hub to the appropriate wire pairs on the cross connect leading to the room's wall jack (see

Figure 25).

To connect the DW8A-SE modular cord to the wire pairs on the cross connect, you punch down the appropriate leads of the

DW8A-SE cord to the selected pairs on the cross-connect block. To determine which unused pairs

are

appropriate for use in your wiring environment, see Table 3 or Table 4.

FIGURE 25 Hub to 66-type Cross Connect

To Room's

Wali Jack

I

25-pair/

Station

Cable

)

)

64 Making Connections to a Hub

Hub-to-Hub Connection (Wiring Closet to

Room)

To connect a Hub in a wiring closet to a Hub in a room, you must first connect the Hub in the wiring closet to a wall jack in the room as described in the previous section.

After you have made that connection, connect the Hub in the room to the wall jack using modular cord, as described in the following steps:

1 Set the IN/OUT switch on the Hub in the room to the OUT position, as shown in Figure 17.

2 Make sure that the Link Integrity settings for the modular jacks on both Hubs agree.

3 Select the appropriate length DW8A-DE modular cord to connect the Hub to the wall jack.

4 Connect one end of the modular cord to the IN/OUT jack of the

Hub.

S Route the free end of the modular cord to the wall jack.

6 Connect the free end of the modular cord to the wall jack.

Making Connections to a Hub 65

Hub-to-Hub Connection Between

Wiring Closets

The two procedures in this section describe how to connect Hubs in wiring closets using twisted-pair wire and optical fiber, respectively.

Each procedure assumes that a twisted-pair wire or optical fiber path already exists between the two target wiring closets. You can take advantage of this existing path to connect a Hub in one closet to a Hub in a second closet.

Closet-to-Closet Hub Connection Using

Twisted-Pair Wire

To connect a Hub in wiring closet A to a Hub in wiring closet B using existing twisted-pair wire, follow these steps:

1 Connect one of the Hub's IN jacks in wiring closet A to the appropriate cross connects for your wiring environment.

• If this closet contains IIG-type wiring, use a DW8A-DE modular cord to connect the IN jack of the Hub to a 356A

Adapter that, in tum, is connected to the appropriate pairs of wires on the wiring block in the purple field.

•

)

66 Making Connections to a Hub

Then connect the same wire pairs on the purple field to the wire pairs on the gray/white field leading to wiring closet B with either a 2-pair or 3-pair patch cord (see Figure 26).

FIGURE 26 Hub to 11D-type Cross Connect

IN Jack

~

,

•

•

••

•

••

••

• DWBA-DE a

To Wiring

Block B

25-pair

Station

~

Cable

GraylWhile Field Purple Field

Making Connections to a Hub 67

• If this closet contains 66-type wiring, use a DW8A-SE modular cord to connect the IN jack of the Hub to the appropriate wire pairs on the cross connect that

are

connected to wiring closet B (see Figure 27).

To connect the DW8A-SE modular cord to the wire pairs on the cross connect, you punch down the appropriate lcads of the DW8A-SE cord to the selected pairs on the crossconnect block. To determine which unused pairs are appropriate for use in your wiring environment, see Table 3 or Table 4.

FIGURE 27 Hub to 66-type Cross Connect

To Wiring

Closet 8

I

25-pair~

Station

Cable

DWBA-SE

\ r ; ; ; " " . /

~i

IN Jack

)

68 Making Connections to a Hub

2 Set the IN/OUT switch on the Hub in wiring closet B to the

OUT position, as shown in Figure 17.

3 Make sure that the Link Integrity settings for the modular jacks on both Hubs agree.

4 Connect the IN/OUT jack of the Hub in wiring closet B to the wire pairs on the cross connect that lead to the Hub in wiring closet A, as shown in Figure 28 (for a II Ootype wiring closet) or

Figure 29 (for a 66-type wiring closet).

FIGURE 28 110-type Cross Connect to Hub

OUT Jack ~II

~

~

~

~

~

~

~

~

~

~

~ o

DW8A·DE

2S-pair

Station

Cable

--------~-

From

Wiring

Closet A

GraylWhile Fieid Purple Field

Making Connections to a Hub 69

FIGURE 29 66-type Cross Connect to Hub

From Wiring

Closet A

I

25-pair/

Station

Cable

DWBA-SE

\

~

•

D

_ ...0..."

_.C:..

n

1O,. ...WlIlIll

(

)

)

70 Making Connections to a Hub

Closet-to-Closet Hub Connection Using

Optical Fiber

To connect a Hub in one wiring closet to a Hub in another wiring closet using optical fiber, you must use two StarLAN 10 Networlc

Fiber Adapters. The Fiber Adapter accepts a modular cord from the Hub and two optical fiber connections (transmit and receive).

Both ends of the optical fiber have this same type of connection.

For additional information about the Fiber Adapter, see the

StarLAN 10 Network Fiber Adapter Installation Guide.

To connect a Hub in wiring closet A to a Hub in wiring closet B using optical fiber, follow these steps:

1 Set the IN/OUT switch on the Fiber Adapter in wiring closet A to the OUT position.

2 Make sure that the Link Integrity setting of the Hub in wiring closet A matches that of the Fiber Adapter.

Making Connections to a Hub 71

3 Connect an IN jack of the Hub in wiring closet A to the

IN/OUT jack on the Fiber Adapter using a modular cord with a maximum length of 15 meters, as shown in Figure 30.

FIGURE 30 COnnecting a Hub to a Fiber Adapter (Closet A)

..

..

..

..

~

..

..

..

..

..

..

0

Wiring

Closet A

OUT

JacZ

Fiber

I

R

XlLink

LEO

FY1

~~

8

"""IN

Jack

\ i'

~

RX

~ ~I

""'-

Connec

TX

C onnecto r tor rt

/1e-

Wiring

Closet 8

?

..

..

..

..

..

..

..

~

..

....

0

~

4 Select two optical fibers that run from wiring closet A to wiring closet B.

5 Connect one optical fiber in wiring closet A to the Rx (receive) connector on the Fiber Adapter in wiring closet A. Then connect the other optical fiber in wiring closet A to the Tx

(transmit) connector on the Fiber Adapter in wiring closet A.

(See Figure 31.)

6 Go to wiring closet B.

)

72 Making Connections to a Hub

7 Connect the optical fiber from the Tx (transmit) connector in wiring closet A to the Rx (receive) connector on the Fiber

Adapter in wiring closet B. The Fiber Rx/Link LED (green) on the Fiber Adapter will tum ON when the correct optical fiber is connected.

If the Fiber Rx/Link LED on the Fiber Adapter does not light, disconnect that fiber and connect the other optical fiber to the

Rx (receive) connector.

If the Fiber Rx/Link LED on the Fiber Adapter still does not light, refer to the StarlAN 10 Network Fiber Adapter

1nslallatlon Guide for troubleshooting procedures.

8 If the Fiber Rx/Link LED lights, connect the remaining fiber to the Tx (transmit) connector on the Fiber Adapter.

9 Set the IN/OUT switch on the Fiber Adapter in wiring closet B to the IN position.

10 Set the IN/OUT switch on the Hub in wiring closet B to the

OUT position, as shown in Figure 17.

11 Make sure that the Link Integrity setting of the Hub in wiring closet B matches that of the Fiber Adapter.

Making Connections to a Hub 73

12 Connect the IN/OUT jack of the Hub in wiring closet B to the

IN/OUT jack on the Fiber Adapter in wiring closet B using a modular cord.

13 If desired, enable the Link Integrity Pass Thru switch on both

Fiber Adapters in rooms A and B.

The Pass Thru function sends link failure indications received at a Fiber Adapter through to a Hub. Thus, the Link/Jab LED on the Hub in closet

B can indicate link failures on the modular cord connection in closet B, the optical fiber connection between closets, or the modular cord connection in closet A. The Pass Thru function is only supported on Fiber Adapters that have Wire Link Integrity enabled. For more information, see the Fiber Adapter

Installation Guide.

When you have properly connected the Hubs and Fiber

Adapters, the Hub-to-Hub connection using modular cord and optical fiber will look like Figure 31.

FIGURE 31 Closet-to-Closet Connection Using Optical Fiber

~

Wiring

Closet A

Wiring

Closet B

0

..

..

..

..

..

~

..

..

..

..

..

F=

.-

\

~

' ' -

I"--IN

\

Jack

OUT

Jack_

0

..

..

..

..

..

..

..

~

..

..

..

~

)

74 Making Connections to a Hub

Hub-to-Hub Connection Between Buildings

The StarLAN 10 Network allows you to share infonnation between buildings. To do this, you connect a Hub in a wiring closet

(typically the closet in the basement, called the "equipment room ") in one building to a Hub located in a wiring closet of another building using Fiber Adapters and optical fiber as the medium.

The optical fibers used to connect Fiber Adapters can be up to 6560 feet (2 kilometers) long. The use of optical fiber as a connection medium between Hubs allows you to create a single StarLAN 10

Network that services users in multiple buildings. When designing a multiple-building StarLAN 10 Network, you must adhere to delay and distance guidelines.

Each connection to optical fiber requires a StarLAN 10 Network

Fiber Adapter. The Fiber Adapter accepts a modul¥ cord from the

Hub and two optical fiber connections (transmit and receive) from the optical fiber cross connect Both closets must have this type of connection.

For additional infonnation on the Fiber Adapter, see the StarLAN

10 Network Fiber Adapter 1nstallation Guide.

To connect a Hub in building A to a Hub in building B, follow the procedure "Closet-to-Closet Hub Connection Using Optical Fiber" earlier in this guide.

Making Connections to a Hub 75

Verifying Connections to the Hub

After you have completed making proper connections to the Hub's

AU1 port and the modular jacks, you should verify that these connections are good by performing the procedure in this section:

~ Note

Before performing this procedure, make the proper connections to the Hub's AUI port and its modular jacks. Verify that the connected devices are powered on and that Link Integrity is configured properly on the Hub and the connected twisted-pair devices....

Procedure

To verify connections to the Hub, follow these steps:

1 Plug in the Hub and turn on the devices connected to it.

2 Load the network software on the Hub.

aU of the computers connected to

3 After the network software has been loaded, verify connectivity through the Hub by attempting to establish communications between any two computers connected to it:

• If you are using AT&T StarGROlJPTM software, you can run the NETSTAT Program to test connectivity. For information on running the NETSTAT Program, see the guides packaged with the StarGROUP software.

• lfyou are not using AT&T StarGROUP software, see the documentation supplied with your software for a method of checking network connectivity.

Ver~ying Connections to the Hub 77

4 If the connectivity test perfonned in Step 3 is not successful, verify the relationship between the Hub's AU! port/modular jacks and the connected devices. Verify that the OUT to IN connection rule is obeyed (for more infonnation, see the section entitled' 'General Connection Rules" earlier in this guide).

If the relationship is correct, the Hub is probably not the source of the problem. Contact your system administrator for further assistance.

)

)

78 Making Connections to a Hub

Interpreting Hub LEOs

Your Hub has LEOs which verify connections to twisted-pair wire devices (linkIjab LEOs) and indicate the presence of the following:

• network traffic (traffic LEO).

• network collisions (collision LEO).

• collision stonns (link/jab LEOs).

• continuous transmissions-also known as jabber (link/jab

LEOs).

You can use these LEOs to isolate defective building wiring.

modular cords. cord connections. power transfonners. and nodes.

Of the 14 LEOs shown in Figure 32. two LEOs (traffic and collision) indicate activity related to the Hub (not specific to any one connection). Included in the remaining 12 LEOs are the AUI jab LEO and the link/jab LEOs. The AU! jab LEO is associated with the AUI port. and the II link/jab LEOs are associated with each of the II modular jacks (one LEO per jack/port).

Interpreting Hub LEOs 79

FIGURE 32 Hub LEOs

~

..

..

..

H

..

f-' f- • f- •

0

" -.

J,~

..

..

..

f-•

~

_1

II

'11'1 f-f- •

I!!-

..

..

..

..

f-f-• f- • f-.

I-f-

Traffic LED

Collision LED

Link/Jab LEOs

AUI Jab LED

~

80 Interpreting Hub LEOs

)

To better understand how traffic and collision LEDs reflect network activity, it is important for you to know how network signals travel through Hubs. A network signal enters the Hub through any port and is transmitted out through all other Hub ports

(see Figure 33).

FIGURE 33 Traffic Traveling Through Hubs

To a connected device

..

..

•

......

>---~

I

D

D

I

I [)

..

..

..

..

I [)

I ()

I D

I [}

..

I D

• I

Co

--.-----i-O

~

•

Network signals initiated from this node

The following sections describe the functions of the Hub's LEDs and explain how to interpret their various states.

Interpreting Hub LEOs 81

Traffic LED

The green LED located on the top right of the Hub (see Figure 34) indicates network traffic.

Under normal operating conditions. the traffic LED is ON when there is no traffic (and power is being supplied to the Hub) and blinks OFF to indicate the presence of traffic from a connected node or another Hub.

The traffic LED is useful as a troubleshooting aid, as indicated in the next section, •'Traffic LED Indications.••

FIGURE 34 Traffic LED

Traffic LED

~y

~ ....

~

)

)

)

82 Interpreting Hub LEDs

Traffic LED Indications

Table 5 lists the possible states of the traffic LED. Match the activity of the traffic LED on the Hub with one of the states indicated in the table.

TABLE 5 Traffic LED

State

Blink

Indication

Normal

On

Off

Normal

Problem

Interpretation

Traffic received from any device connected to the

Hub

No traffic, power on

No power. (See "Note")

~ Note

If the traffic LED is off, return the Hub to the original place of purchase.

if you purchased the Hub from AT&T in the United

States or Puerto Rico, call the toll-free AT&T National System

Support Center hotline at I -800-922-0354.

In Canada, call the toll-free AT&T Canada. Inc. hotline at 1-800-387-0913.

In all other countries, call your authorized AT&T dealer. ...

Interpreting Hub LEOs 83

Collision LED

The amber LED located on the top right of the Hub (see Figure 35) indicates collisions. This LED normally is OFF and blinks ON to indicate the presence of collisions.

A collision occurs when two nodes anempt to transmit on the network at the same time. When a collision occurs, both nodes recognize the collision, stop transmitting, wait a random amount of time, and attempt to retransmit Collisions are normal occurrences on CSMA/CD networks; the more heavily used a StarLAN 10

Network is, the more often collisions will occur.

FIGURE 35 Collision LED

....

g

(

Collision LED

~

)

)

84 Interpreting Hub LEOs

)

As the frequency of collisions on a networlc increases. the activity

(on-time) of the LED also increases.

If the collision LED becomes very active. you may want to make use of other networlc troubleshooting tools. such as the AT&T StaR3ROup™ Software

Networlc Manager or the NETSTAT command, to determine whether the networlc has reached capacity and may need to be separated into two networlcs connected by a bridge.

While the collision LED blinks to indicate normal networlc collisions. it also may be useful in troubleshooting certain problems related to networlc wiring. If the collision LED blinks when only one node connected to the Hub is active. there may be a wiring problem associated with that jack or port.

Typical wiring problems indicated by excessive activity of the collision LED include the following:

• a defective twisted-pair wire connected to a Hub jack or cross connect

• a defective connector

• a poor grade or wrong type of cable

• a twisted-pair wire that exceeds recommended length

• a twisted-pair wire that passes through or is bundled with an excessive source of high intensity noise

• a bridged tap

• a Medium Attachment Unit (MAU) connected to the AUI port without the SQE test function disabled

If none of these problems exist, the problem may be related to that jack or port on the Hub.

Interpreting Hub LEDs 85

AUI Jab LED

The red LED located near the AU!

port on the Hub (see Figure 36) indicates a jab condition. The AU! Jab LED is OFF under normal operating conditions and ON to indicate that ajab condition exists at the AU!

port.

FIGURE 36 AUI Jab LED

~

~

..

..

..

..

..

..

- "

- 0

--

- 0

B

..

--

- 0

_ 0

..

..

..

..

"

•

_ 0

0

..

n

,

~

' -

T

AUI

J ab LED

)

)

86 Interpreting Hub LEOs

)

A jab condition exists when either of the following events is detected at the AUI port:

• The transmission of network signals exceeds the maximum allowable transmission time.

• Successive collisions are detected on a given connector (A UI port) without an intervening successful transmission or reception.

A jab condition may be caused by a faulty node or wiring connection. A typical faulty wiring condition would be a missing terminator on the coax segment attached to the AUI port.

When a jab condition is detected at the AUI port, the Hub automatically deactivates the AUI port's ability to receive incoming data. The jab condition is indicated at the AUI port by the ON state of the AUI jab LED. The hardware device (and consequently all devices connected to that hardware device) associated with the AUI port is temporarily disconnected from the network. The modular jacks and their associated devices are undisturbed and continue functioning nOlmally.

When the cause of the jab condition has been corrected and a normal data packet is transmitted to or received from that AUI port without a collision, the AUI port is automatically reactivated and the LED is turned OFF.

Interpreting Hub LEOs 87

Link/Jab LEOs

Link/Jab LEDs are multicolored (red, green, amber).

A Link/Jab

LED is located near each modular jack on the Hub (see Figure 37).

The Link/Jab LED indicates the presence of jab at the Hub's modular jacks (this function overrides the Link/Jab LED's Link

Integrity indications). In the absence of jab, the Link/Jab LED indicates whether the Link Integrity is enabled. When Link

Integrity is enabled, the Link/Jab LED verifies the integrity of the receive portion of the twisted-pair wire connection.

FIGURE 37 Link/Jab LEOs

..

..

..

..

11-

..

--

- -

T

..

-..

--

--

--

--

--

..

..

. . --

..

-

-,

-,

.

..,--f--Link/Jab LEOs

)

)

88 Interpreting Hub LEOs

Under nonnal operating conditions, the Link/Jab LED will remain either ON GREEN (if Link Integrity is enabled and the link is good) or ON AMBER (if Link Integrity is disabled). The Link/Jab

LED is OFF when its corresponding jack: is not in use.

Use Table 6 to interpret the status of a Link/Jab LED that is connected to a device. Complete descriptions of jab and Link

) Integrity states appear following the table.

)

TABLE 6 States of the link/Jab LED at Connected Jacks

LED State

ON RED

Description

A jab condition exists at the modular jack:. This function overrides the Link/Jab LEOs Link

Integrity Indications.

ON GREEN Link: Integrity is enabled and the receive portion of the link is good.

OFF Link Integrity is enabled and one of the following conditions exist:

• a problem exists with the connection to the twisted-pair wire device

• if the connected device is a Fiber Adapter with Link Integrity Pass Thru enabled, a problem may also exist in the connections between the fiber side of the adapter and the end device in the path.

• the connected device is powered OFF

• the Hub is not receiving power

• the LED is malfunctioning

To test the LED, disconnect the twisted-pair wire jacks and perfonn the procedure in the the section entitled "Power-Up LED Test" earlier in this guide.

ON AMBER Link Integrity is disabled.

Interpreting Hub LEOs 89

Jab Indications

The Link/Jab LED will remain ON RED when ajab condition exists at a modular jack. A jab condition exists when either of the following events is detected at a modular jack:

• The number of successive collisions exceeds the maximum allowable number of successive collisions.

• The duration of a collision exceeds the maximum allowable duration for a collision.

A jab condition may be caused by a faulty node or wiring condition

(for example, an electrical short in a piece of twisted-pair wire).

When jab is detected at one of the ports, the Hub automatically deactivates this port. The twisted-pair wire device connected to the port is disconnected temporarily from network. The remaining devices connected to other ports on the Hub are undisturbed and continue to function normally.

When the cause of the jab has been corrected and a normal data packet is transmitted to the port, the port is automatically reactivated and the Link/Jab LED returns to its previous state.

Communication is automatically re-established between the twisted-pair wire device connected to the port and the rest of the network.

)

)

90 Interpreting Hub LEOs

)

Link Integrity Indications

In the absence of jab and with Link Integrity enabled, the Link/Jab

LED can provide the following indications:

• If the LED remains ON GREEN, the receive portion of the twisted-pair wire connection is good. Check the LED on the connected device to verify the integrity of the transmit portion.

• If the LED remains OFF, either a problem with the twisted-pair wire connection is indicated, or, if the Hub is connected to a

Fiber Adapter with Link Integrity Pass Thru enabled, a problem may also exist in the connections between the fiber side of the adapter and the end device in the path.

Verify that both the Hub and the connected device are powered on and that the Link Integrity option switch has been set correctly on both devices.

If the connected device is a Fiber

Adapter, disable Pass Thru on the Adapter and check the Hub

LED again.

If the LED is now ON GREEN, the problem is on the fiber side of the adapter.

If the problem needs to be isolated further, check for an incomplete or incorrect twisted-pair wire connection between the devices (such as a loose modular cord or an OUT-OUT connection).

If necessary, use a continuity tester or a time domain reflectometer

(TOR) to test the twisted-pair wire for breaks or shorts.

If a valid twisted-pair wire connection exists, one of the two devices may be defective.

In the absence of jab and with Link Integrity disabled. the Link/Jab

LED should remain ON AMBER. This indicates that the Hub is receiving power. Note that this does not necessarily indicate a valid twisted-pair wire connection.

Interpreting Hub LEOs 91

Hub Pin Assignments

The following illustrations indicate the pin assignments for modular jacks and the AU! port on the Hub. You may find this information helpful in troubleshooting networks comprised of equipment that has pin assignments different from those used in

AT&T equipment.

FIGURE 38 RJ45 Connector

Pin OUT Jack Assignments

1 OUTGOING DATA 1 (+)

4

5

2 OUTGOING DATA 2 (-)

3 INCOMING DATA 1 (+)

(No Connection)

(No Connection)

6

INCOMING DATA 2 (-)

) 7 (No Connection)

8 (No Connection)

IN Jack Assignments

INCOMING DATA 1 (+)

INCOMING DATA 2 (-)

OUTGOING DATA 1 (+)

(No Connection)

(No Connection)

OUTGOING DATA 2 (-)

(No Connection)

(No Connection)

Hub Pin Assignments 93

FIGURE 39 OTE O·type Connector

O

8 7 6 5 4 3 2 1 0 o 0 0 0 0 0 0

15 14 13 12 11 10 9

Pin

3

10

11

5

12

4

7

15

9

I

8

2

6

13

14

Shell

Circuit

CI-A

CI-B

CI-S

V c

VP

VS

PG

DO-A

DO-B

DO-S

DI-A

DI-B

DI-S

CO-A

CO-B

CO-S

Use

Data Out Circuit A

Data Out Circuit B

Data Out Circuit Shield

Data In Circuit A

Data In Circuit B

Data In Circuit Shield

Control Out Circuit A

Control Out Circuit B

Control Out Circuit Shield

Control In Circuit A

Control In Circuit B

Control In Circuit Shield

Voltage Common"

Voltage Plus"

Voltage Shield

Protective Ground (Conductive Shell)

• Voltage Common and Voltage Plus use a single twisted-pair in the AUl cable.

)

94 Interpreting Hub LEDs

Glossary

)

)

This section explains technical tenns for readers unfamiliar with communications wiring environments and local area networks.

lA-Key system

IOBASE2

IOBASES

IOBASE-T

66-type wiring environment nO-type wiring environment

The AT&T wiring system for the 6-button telephones called "lA-Key sets."

An IEEE Standard 802.3 for local area networks. Complying networks must be capable of carrying infonnation at a rate of 10

Mbitslsecond over distances up to 606 feet

(185 meters) of thin coaxial cable.

An IEEE Standard 802.3 for local area networks. Complying networks must be capable of carrying infonnation at a rate of 10

Mbitslsecond over distances up to 1640 feet

(500 meters) of thick coaxial cable.

A draft standard of the ANSI/lEEE Standard

802.3 for LANs compatible with Ethernet networks on unshielded twisted-pair wire.

An older AT&T wiring system. now being replaced by the 110-type. in which a special tool must be used to attach to the cross connect the twisted-pairs from telephones. nodes. and other communications devices.

Also called "Premises Distribution

System" (PDS). The AT&T wiring system in which the telephones. nodes, and other communications devices can be easily added and rearranged with modular wiring components and patch cords.

Glossary 95

802.3

adapter A device that supports the interconnection of different sizes or types of plugs.

Attachment Unit The interface between the Medium

Interface (A VI) Attachment Unit and a node within a local area network.

bridged tap A cable (or cord) connected to another cable

(or cord) at a point other than its end. Such a tap causes impairment of network signal transmissions.

coaxial cable

An IEEE standard for local area networks based on bus configuration and Carrier Sense

Multiple Access with Collision Detection

(CSMNCD) (includes !BASE5. IOBASE2.

and IOBASE5).

collision collision storm conductor configuration

A cable with at least one transmission line consisting oftwo conductors. an inner conductor and an outer conductor. insulated from one another by a dielectric. Coaxial cable carries higher frequencies than twisted-pair cable and offers a broader bandwidth.

It is commonly used to transmit video signals. but can also be used for certain high speed data applications.

A condition that occurs when two nodes attempt to transmit on the network at the same time. When a collision occurs. both nodes recognize the collision. stop transmission. wait for a random time interval.

and then attempt to retransmit.

An excessive amount of consecutive collisions on a port indicating a potential problem with the wiring connection or a faulty node.

A medium such as copper wire that can carry electrical current.

The layout of nodes and components in the network.

)

)

)

96 Glossary

) cross connect A panel on which the leads of station cable are mounted so that an AT&T technician, other wiring craftsperson, or the system administrator can make electrical connections between the communications devices wired to the cables.

DCE Data communication equipment.

DTE Data terminal equipment.

equipment room An enclosed space where voice and data common equipment circuit administration is performed.

Ethernet

Ethernet transceiver

A 10 Mbits/second Carrier Sense Multiple

Access with Collision Detection (CSMNCD) local area network on coaxial cable.

A device used in an Ethernet local area network to couple data terminal equipment to the transmission medium.

Fiber Adapter A hardware device used to convert StarLAN

10 Network signals between electrical signals transmitted on twisted-pair wire medium and light pulses transmitted on optical fiber medium.

Hub A device used to provide connectivity between data terminal equipment in a

StarLAN 10 Network. Each Hub provides connections for up to 12 hardware devices:

11 modular jacks (10 dedicated IN jacks and

1 switchable IN/OUT jack) and an AUt port.

jab jabber

A condition where a port is disconnected from the network as a result of the detection of jabber or a collision storm on that port.

A condition where the transmission of network signals exceeds the maximum allowable transmission time. Jabber may be caused by a faulty node or wiring connection.

LED Light emitting diode.

Glossary 97

Link Integrity function local area network (LAN)

Medium

Attachment

Unit (MAU) megabit (Mbit) modular cord

Network Access

Unit (NAU) node optical fiber plenum cord port primary Hub

A generated signal that verifies continuity between twisted-pair wire devices.

A data communications network consisting of host computers or other equipment interconnected to terminal devices, such as personal computers, often via twisted-pair wire or coaxial cable. Typically, the network is limited to a single premise.

A device used in a data station to couple the data terminal equipment to the transmission medium.

One million bilS.

A cord containing four twisted pairs of wires, with a modular plug on one or both ends.

A plug-in expansion board that enables

StarLAN 10 Network nodes to send and receive data through the network.

A Network Access Unit or an AT&T

Information Systems Network (ISN) StarLAN

Interface Module (SLIM).

A transmission medium consisting of a core of glass surrounded by strengthening material and a protective jacket. Signals are transmitted as light pulses and introduced into the optical fiber by a laser or light emitting diode.

Communications cord with fire-retardant insulation, generally used in suspended ceilings and other places where air circulates back to the building's air-conditioning system.

On a network device, an outlet where other devices may be connected. For example, the

AU! port and modular jacks on the StarLAN

10 Network Hub.

The Hub to which all other Hubs in a room or wiring closet are connected. If a room or a wiring closet has only one Hub, it also is considered a primary Hub.

98 Glossary

)

)

) secondary Hub tip/ring system

Any Hub whose OUT jack is connected to an

IN jack of a primary Hub in the same room or wiring closet.

The AT&T wiring environment that designates tip and ring as the functions of two conductors within each wire group of a 25pair station cable.

transceiver cable A cable used to connect two hardware devices: one having aD-type DCE connector and the other having aD-type DTE connector. Also called" AU! cable." twisted-pair wire Two insulated copper wires twisted together.

The twists are varied in length to reduce the potential for signal interference between pairs.

In cables greater than 25 pairs, the twisted-pairs are grouped and bound together in a common cable sheath. Twisted-pair cable is the most common of transmission media.

wall jack Also called "connecting block," "modular wall outlet," or "information outlet. "A receptacle used with a modular plug to make electrical contact between circuits and communications devices. such as telephones and nodes.

wiring block wiring closet wiring environment

The part of the I !O-type cross connect that terminates twisted pair wiring and can be used with either jumper wires or patch cords to establish circuit connections.

A room, closet, or cabinet where station cable is terminated on cross connect blocks and where the building communications system can be administered.

Any building communications wiring system. See also nO-type wiring environment and 66-type wiring environment.

Glossary 99

Index

A

Adapters description. 17 definition, 96

AT&T for design or installation, 9 for help, 9 for product inIonnation.

9 hotline, 9

Attachment Unit Interface.

AUI,3,96

See AU!

AU! Adapter modular cord length, 30

AUI cable.

See Transceiver cable

AU! Jab LED, 86

AUI pan, 3, 47

B

Bracket for rnounting. 36

Bridge tap, 85

Broadband, 1

Broadband Hub cormections, 3

Building-to-building configuration, 28 connection, 75

)

C

Cable

25-pair,62 transceiver, 1

Closet connecting nodes, 66 specifications, 34

Coaxial cable, 96

Coaxial Hub connections, 3

Collision, 96

Collision LED, 84

Collision SlOnn, 5, 96

Conductor, 96

Configuration defInition, 96 hierarchy, 19

Hub,I9 star, 1

Connecting a Huh in a room LO a wiring closet. 65 a Hub in a wiring closet to a Hub in another wiring closet, a Hub

66 in one building to a Hub in another building. 75 fonn, 11 multiple Hubs, 50, 55 rules, 47 verification, 77

Cords.

See Modular cord

Cross connect, 85, 97

CSMAICD,I o

D8W cord, 16, 55

Design considerations, 11

Distance guidelines. 30

Distances for cord length. 33

DP8B-DE cord, 16

DW8A-DE cord, 16, 52, 55, 63, 65, 66

DW8A·SE cord, 16, 62, 64, 68

E

Equipment room, 19,97

Ethernet. 97

Ethernet transceiver cable length, 30 defmition, 97

Extension cord, 17, 33

F

Fiber Adapter, 17,25,28,30,71

Index 101

H

Hardware device. 1

Hotline, 9

Hub configurations, 19 connecting rules. 47 defmition,97 dimensions. 34 functions, I, 3 ki~ 11, 14 labeling, 45

LEOs, 79 locations, 20 modular cord length, 30 mounting.

31 operating environment, 32 placement, 31

Hub connections between buildings, 75 broadband, 3 coaxial. 3 general rules. 47 optical fiber, 3, 66, 71, 75 twisted-pair wiring, 3 verifying, 77

I

Identifying a wiring environment, 58

IEEE Standard 802.3, I

IN jack connection, 47, 63, 66, jab,79

72 jabber, 5 prewiring.

3

INIOUT jack connection, 47

Installation connections, 47 design fonn. 11 labeling, 45 mounting, 36

J lab, 87,97 lab condition, 5, 87, 90

Jab condition isolation. 5, 87.90

labber, 5, 79, 97

K

IG~ 7, 11, 14

L

Labeling Hubs, 45

LAN,I,98

LEOs

AU! lab, 86 collision, 84

Link/lab, 88 testing, 41 traffic, g2

Light Emitting Diodes.

Link Integrity, 5, 88

See LEOS

LinklJab LED, 88

Local area network.

See LAN

M

Media,

Megabi~

I

98

Modular cord connections, 47 defmition.98

lengths, 16 table, 16

Modular wall jack, 3, 23

Mounting

Hubs,36 requirements.

31

Multiple wiring closets, 25

N

NAU, 98

Network configurations. 20

Network design, 11

Network signals, 1,5,81

Network traffic, 81

Node defmition,98 modular cord length, 30 o lA-Key system definition, 95 wiring environment, 59

IIG-type cross connect, 58

IlO-type wiring environment. 95

Optical fiber configmation, 25, 28 defmition,98

Hub connections, 3, 66,71,75 transceiver, 1

)

)

102 Index

p

Placement considerations, 32

Plenum cord, 16, 98

Power cable, 40

Power requirements, 33

Power snip. 17

Prewiring, 3

Primll1)' Hub definition, 98 labeling, 45

R

Requirements. 31

Room configuration, 22 connections.

51 specifications, 34

S

Secondll1)' Hubs deflOition, 99 labeling, 45

66-type cross connec~ 58

66.type

wiring envirorunent, 95

Star configuration, 1

StarLAN 10 Network, I

Switchable INIOUT jack, 47

T

IOBASE2, I, 95

IOBASE5, I, 95

10BASE-T, 1,95

Testing LEOs, 41

TiplRing definition, 99 wiring envirorunent,

Tools for mounting, 36

59

Traffic, 81

Traffic LED, 82

Transceiver, 97

Transceiver cable, I, 16,30,99

Twisted-pair wire, 1,3,99

V

Verifying connections, 77

)

W

Wall jack, 3, 99

Wiring block, 63,99

Wiring closet configuration, connections.

57

23 definition, 99 hierarchy, 19

See also Closet

Wiring environment definition, 99

1I0-type,95

66-type, 95

Index 103