Digisol DG-FS4526E, MUSTANG 4000 Series Installation Manual

MUSTANG 4000 SWITCH SERIES

DG-FS4526E

INSTALLATION GUIDE

V1.0

2012-04-12

As our products undergo continuous development the specifications are subject to change without prior notice

I

NSTALLATION

G

UIDE

DG-FS4526E FAST ETHERNET SWITCH

Layer 2 Enhanced Managed Switch
with 24 10/100BASE-TX (RJ-45) Ports,
and 2 Gigabit Combination Ports (RJ-45/SFP)

DG-FS4526E

E042012

R01

– 3 –

ABOUT THIS GUIDE

PURPOSE

This guide details the hardware features of the switch, including the physical and
performance-related characteristics, and how to install the switch.

AUDIENCE

The guide is intended for use by network administrators who are responsible for
installing and setting up network equipment; consequently, it assumes a basic
working knowledge of LANs (Local Area Networks).

CONVENTIONS

The following conventions are used throughout this guide to show information:

RELATED PUBLICATIONS

The following publication gives specific information on how to operate and use
the management functions of the switch:

The Management Guide

Also, as part of the switch’s software, there is an online web-based help that
describes all management related features.

N

OTE

:

Emphasizes important information or calls your attention to

related features or instructions.

C

AUTION

:

Alerts you to a potential hazard that could cause loss of data,

or damage the system or equipment.

W

ARNING

:

Alerts you to a potential hazard that could cause personal

injury.

A

BOUT THIS GUIDE

– 4 –

REVISION HISTORY

This section summarizes the changes in each revision of this guide.

APRIL 2012 REVISION

This is the first revision of this guide.

– 5 –

CONTENTS

ABOUT THIS GUIDE 3

C

ONTENTS 5

T

ABLES 7

F

IGURES 9

1I

NTRODUCTION 11

Overview 11

Description of Hardware 13

2NETWORK PLANNING 31

Introduction to Switching 31

Application Examples 32

Application Notes 36

3INSTALLING THE SWITCH 37

Selecting a Site 37

Ethernet Cabling 38

Equipment Checklist 39

Mounting 40

Installing an Optional SFP Transceiver 44

Connecting to a Power Source 45

Connecting to the Console Port 46

4MAKING NETWORK CONNECTIONS 49

Connecting Network Devices 49

Twisted-Pair Devices 49

Fiber Optic SFP Devices 52

C

ONTENTS

– 6 –

Connectivity Rules 54

Cable Labeling and Connection Records 56

ATROUBLESHOOTING 57

Diagnosing Switch Indicators 57

Power and Cooling Problems 58

Installation 58

In-Band Access 58

BCABLES AND PINOUTS 59

Twisted-Pair Cable and Pin Assignments 59

Fiber Standards 63

CHARDWARE SPECIFICATIONS 65

Physical Characteristics 65

Switch Features 67

Management Features 67

GLOSSARY 69

I

NDEX 75

– 7 –

TABLES

Table 1: Supported SFP Transceivers 13

Table 2: Port Status LEDs 15

Table 3: System Status LEDs 15

Table 4: Serial Cable Wiring 46

Table 5: Maximum 1000BASE-T Gigabit Ethernet Cable Length 54

Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths 54

Table 7: Maximum 1000BASE-LX Gigabit Ethernet Cable Length 55

Table 8: Maximum 1000BASE-LH Gigabit Ethernet Cable Length 55

Table 9: Maximum 100BASE-FX Cable Length 55

Table 10: Maximum Fast Ethernet Cable Lengths 55

Table 11: Maximum Ethernet Cable Length 55

Table 12: Troubleshooting Chart 57

Table 13: 10/100BASE-TX MDI and MDI-X Port Pinouts 60

Table 14: 1000BASE-T MDI and MDI-X Port Pinouts 62

Table 15: Fiber Standards 63

T

ABLES

– 8 –

– 9 –

FIGURES

Figure 1: Front and Rear Panels 11

Figure 2: Port and System Status LEDs 14

Figure 3: Power Supply Inlet 16

Figure 4: Reset Button 16

Figure 5: Console Port 17

Figure 6: Collapsed Backbone 32

Figure 7: Network Aggregation Plan 33

Figure 8: Remote Connections with Fiber Cable 34

Figure 9: Making VLAN Connections 35

Figure 10: RJ-45 Connections 38

Figure 11: Attaching the Brackets 41

Figure 12: Installing the Switch in a Rack 42

Figure 13: Attaching the Adhesive Feet 43

Figure 14: Inserting an SFP Transceiver into a Slot 44

Figure 15: Power Inlet 45

Figure 16: Console Cable 46

Figure 17: Making Twisted-Pair Connections 50

Figure 18: Network Wiring Connections 51

Figure 19: Making Fiber Port Connections 53

Figure 20: RJ-45 Connector Pin Numbers 59

Figure 21: Straight-through Wiring 61

Figure 22: Crossover Wiring 61

F

IGURES

– 10 –

– 11 –

1 INTRODUCTION

OVERVIEW

The DG-FS4526E is a Fast Ethernet Layer 2 switch with 24 10/100BASE-TX
ports, and two Small Form Factor Pluggable (SFP) transceiver slots that operate
in combination with 1000BASE-T ports 25~26 (see "Front and Rear Panels" on

page 11).

This switch provides a broad range of powerful features for Layer 2 switching,
delivering reliability and consistent performance for your network traffic. It
brings order to poorly performing networks by segregating them into separate
broadcast domains with IEEE 802.1Q compliant VLANs, and empowers
multimedia applications with multicast switching and CoS services.

Figure 1: Front and Rear Panels

DG-FS4526E

Port Status Indicators

System Indicators

10/100 Mbps RJ-45 Ports

1000BASE-T/SFP Ports

Reset Button

Grounding Point

Power Inlet

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Overview

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SWITCH ARCHITECTURE

The switch employs a wire-speed, non-blocking switching fabric. This permits
simultaneous wire-speed transport of multiple packets at low latency on all
ports. The switch also features full-duplex capability on all ports, which
effectively doubles the bandwidth of each connection.

This switch uses store-and-forward switching to ensure maximum data integrity.
With store-and-forward switching, the entire packet must be received into a
buffer and checked for validity before being forwarded. This prevents errors
from being propagated throughout the network.

NETWORK MANAGEMENT OPTIONS

With a comprehensive array of LEDs, the switch provides “at a glance”
monitoring of network and port status. The switch can be managed over the
network with a web browser or Telnet application, or via a direct connection to
the console port. The switch includes a built-in network management agent that
allows it to be managed in-band using SNMP or RMON (Groups 1, 2, 3, 9)
protocols. It also has an RJ-45 serial port for out-of-band management. A PC
may be connected to this port for configuration and monitoring out-of-band via
the supplied RJ-45-to-DB-9 serial (RS232) cable.

For a detailed description of the management features, refer to the Management
Guide.

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Description of Hardware

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DESCRIPTION OF HARDWARE

10/100BASE-T PORTS

The switch contains 24 RJ-45 ports that operate at 10 Mbps, or 100 Mbps, half
or full duplex. Because these ports support automatic MDI/MDI-X operation, you
can use straight-through cables for all network connections to PCs or servers, or
to other switches or hubs.

Each of these ports support auto-negotiation, so the optimum transmission
mode (half or full duplex), and data rate (10, or 100 Mbps) can be selected
automatically. If a device connected to one of these ports does not support auto­negotiation, the communication mode of that port can be configured manually.

Each port also supports IEEE 802.3x auto-negotiation of flow control, so the
switch can automatically prevent port buffers from becoming saturated.

SFP TRANSCEIVER SLOTS

The Small Form Factor Pluggable (SFP) transceiver slots are shared with Gigabit
RJ-45 ports 25~26. In the default configuration, if an SFP transceiver
(purchased separately) is installed in a slot and has a valid link on the port, the
associated RJ-45 port is disabled. The switch can also be configured to force the
use of an RJ-45 port or SFP slot, as required.

The following table shows a list of transceiver types which have been tested with
the switch. For an updated list of vendors supplying these transceivers, contact
your local dealer. For information on the recommended standards for fiber optic
cabling, see "Fiber Standards" on page 63.

Table 1: Supported SFP Transceivers

Media Standard Fiber Diameter

(microns)

Wavelength (nm)

Maximum Distance

*

1000BASE-SX 50/125 850 700 m

62.5/125 850 400 m

1000BASE-LX 50/125 1300 550 m

62.5/125 1300 550 m

9/125 1300 10 km

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Description of Hardware

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PORT AND SYSTEM STATUS LEDS

The switch includes a display panel for key system and port indications that
simplify installation and network troubleshooting. The LEDs, which are located
on the front panel for easy viewing, are shown below and described in the
following tables.

Figure 2: Port and System Status LEDs

1000BASE-LH 9/125 1310 35 km

1550 80 km

100BASE-FX 62.5/125 1300 2 km

1000BASE-T 100 m

* Maximum distance may vary for different SFP vendors.

Table 1: Supported SFP Transceivers

Media Standard Fiber Diameter

(microns)

Wavelength (nm)

Maximum Distance

*

Port LEDs

Port 25, 26 LEDs

System LEDs

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Description of Hardware

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Table 2: Port Status LEDs

LED Condition Status

Fast Ethernet Ports (Ports 1-24)

Link/Activity/
Speed

On/Flashing Amber Port has established a valid 10 Mbps network

connection. Flashing indicates activity.

On/Flashing Green Port has established a valid 100 Mbps network

connection. Flashing indicates activity.

Off The link is down.

SFP Gigabit Ethernet Ports (Ports 25-26)

(Link/Activity) On/Flashing Amber Port has established a valid 10/100 Mbps network

connection. Flashing indicates activity.

On/Flashing Green Port has a valid link at 1000 Mbps. Flashing

indicates activity.

Off The link is down.

Table 3: System Status LEDs

LED Condition Status

PWR On Green The unit’s internal power supply is operating

normally.

Off The unit has no power connected.

Diag On Green The system diagnostic test has completed

successfully.

On Amber The system diagnostic test is in progress.

Flashing Amber The system diagnostic test has detected a fault.

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Description of Hardware

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POWER SUPPLY INLET

There is one power inlet on the rear panel of the switch. The standard power
inlet is for the AC power cord.

Figure 3: Power Supply Inlet

GROUNDING POINT

To prevent accidental electrical shock or damage to your switch, it is
recommended that you ground the switch to an earth point by attaching a
grounding wire (not supplied) to the grounding point located next to the power
inlet, with a metal screw. If located in a tall building, grounding points include
metal drain pipes, and other electrostatic conductive devices that lead to the
ground, or if located on the first floor of a building, the ground outside itself.

RESET BUTTON

If you encounter any switch malfunctions, such as a hang or non-recoverable
error, you might want to reset the switch to its default configuration by pressing
and holding the reset button for five seconds. The reset button is located on the
rear panel on the opposing side of the power inlet.

Figure 4: Reset Button

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Description of Hardware

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CONSOLE PORT

This port is used to connect a console device to the access point through a serial
cable. The console device can be a PC or workstation running a VT- 100 terminal
emulator, or a VT-100 terminal. A crossover RJ-45 to DB-9 cable is supplied with
the unit for connecting to the console port.

Figure 5: Console Port

Console Port

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Description of Hardware

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– 31 –

2 NETWORK PLANNING

INTRODUCTION TO SWITCHING

A network switch allows simultaneous transmission of multiple packets via non­crossbar switching. This means that it can partition a network more efficiently
than bridges or routers. The switch has, therefore, been recognized as one of
the most important building blocks for today’s networking technology.

When performance bottlenecks are caused by congestion at the network access
point (such as the network card for a high-volume file server), the device
experiencing congestion (server, power user, or hub) can be attached directly to
a switched port. And, by using full-duplex mode, the bandwidth of the dedicated
segment can be doubled to maximize throughput.

When networks are based on repeater (hub) technology, the distance between
end stations is limited by a maximum hop count. However, a switch turns the
hop count back to zero. So subdividing the network into smaller and more
manageable segments, and linking them to the larger network by means of a
switch, removes this limitation.

A switch can be easily configured in any Ethernet, Fast Ethernet, or Gigabit
Ethernet network to significantly boost bandwidth while using conventional
cabling and network cards.

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Application Examples

– 32 –

APPLICATION EXAMPLES

This switch is not only designed to segment your network, but also to provide a
wide range of options in setting up network connections. Some typical
applications are described below.

COLLAPSED BACKBONE

This switch is an excellent choice for mixed Ethernet, Fast Ethernet, and Gigabit
Ethernet installations where significant growth is expected in the near future.
You can easily build on this basic configuration, adding direct full-duplex
connections to workstations or servers. When the time comes for further
expansion, just connect to another hub or switch using one of the Fast Ethernet
ports, a Gigabit Ethernet port, or a plug-in SFP transceiver on the front panel.

In the figure below, the DG-FS4526E is operating as a collapsed backbone for a
small LAN. It is providing dedicated 10 Mbps full-duplex connections to
workstations, 100 Mbps full-duplex connections to power users, and 1 Gbps full­duplex connections to servers.

Figure 6: Collapsed Backbone

DG-FS4526E

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Application Examples

– 33 –

NETWORK AGGREGATION PLAN

With 26 parallel bridging ports (i.e., 26 distinct collision domains), these
switches can collapse a complex network down into a single efficient bridged
node, increasing overall bandwidth and throughput.

In the figure below, the 10/100BASE-TX ports on the switch are providing 100
Mbps connectivity for up to 24 segments, while the 1000BASE-T ports are
providing connectivity for two Gigabit segments.

Figure 7: Network Aggregation Plan

Server Farm

10/100 Mbps
Segments

...

...

1000 Mbps
Segments

DG-FS4526E

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Application Examples

– 34 –

REMOTE CONNECTIONS WITH FIBER

Fiber optic technology allows for longer cabling than any other media type. A
1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a
1000BASE-LX (SMF) link up to 5 km, a 1000BASE-LH link up to 80 km, and a
100BASE-FX (SMF) link up to 20 km. This allows the switches to serve as a
collapsed backbone, providing direct connectivity for a widespread LAN.

The figure below illustrates the DG-FS4526E connecting multiple segments with
fiber cable.

Figure 8: Remote Connections with Fiber Cable

...

...

Headquarters

1000BASE-LX SMF
(5 kilometers)

Remote Switch

10/100 Mbps Segments

1000BASE-SX MMF
(550 meters)

Remote Switch

Server Farm

DG-FS4526E

DG-FS4526E

DG-FS4526E

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Application Examples

– 35 –

MAKING VLAN CONNECTIONS

This switch supports VLANs which can be used to organize any group of network
nodes into separate broadcast domains. VLANs confine broadcast traffic to the
originating group, and can eliminate broadcast storms in large networks. This
provides a more secure and cleaner network environment.

VLANs can be based on untagged port groups, or traffic can be explicitly tagged
to identify the VLAN group to which it belongs. Untagged VLANs can be used for
small networks attached to a single switch. However, tagged VLANs should be
used for larger networks, and all the VLANs assigned to the inter-switch links.

Figure 9: Making VLAN Connections

N

OTE

:

When connecting to a switch that does not support IEEE 802.1Q

VLAN tags, use untagged ports.

Finance

Marketing

VLAN 3

Untagged Ports

VLAN

unaware

switch

VLAN
aware
switch

Finance

VLAN 3

R&D

VLAN 2

Testing

R&D

Testing

VLAN 1

VLAN 2

VLAN 4

VLAN 1

Tagged Port

Tagged

Ports

DG-FS4526E

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Application Notes

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APPLICATION NOTES

1. Full-duplex operation only applies to point-to-point access (such as when a

switch is attached to a workstation, server, or another switch). When the
switch is connected to a hub, both devices must operate in half-duplex
mode.

2. Avoid using flow control on a port connected to a hub unless it is actually

required to solve a problem. Otherwise back pressure jamming signals may
degrade overall performance for the segment attached to the hub.

3. As a general rule the length of fiber optic cable for a single switched link

should not exceed:

1000BASE-SX: 550 m (1805 ft) for multimode fiber

1000BASE-LX: 10 km (6.2 miles) for single-mode fiber

1000BASE-LH: 80 km (50 miles) for single-mode fiber

However, power budget constraints must also be considered when
calculating the maximum cable length for your specific environment.

– 37 –

3 INSTALLING THE SWITCH

SELECTING A SITE

Switch units can be mounted in a standard 19-inch equipment rack or on a flat
surface. Be sure to follow the guidelines below when choosing a location.

The site should:

be at the center of all the devices you want to link and near a power
outlet.

be able to maintain its temperature within 0 to 50 °C (32 to 122 °F)
and its humidity within 10% to 90%, non-condensing

provide adequate space (approximately two inches) on all sides for
proper air flow

be accessible for installing, cabling and maintaining the devices

allow the status LEDs to be clearly visible

Make sure twisted-pair cable is always routed away from power lines,

fluorescent lighting fixtures and other sources of electrical interference,
such as radios and transmitters.

Make sure that the unit is connected to a separate grounded power outlet

that provides 100 to 240 VAC, 50 to 60 Hz, is within 2 m (6.6 feet) of each
device and is powered from an independent circuit breaker. As with any
equipment, using a filter or surge suppressor is recommended.

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Ethernet Cabling

– 38 –

ETHERNET CABLING

To ensure proper operation when installing the switch into a network, make sure
that the current cables are suitable for 10BASE-T, 100BASE-TX, or 1000BASE-T
operation. Check the following criteria against the current installation of your
network:

Cable type: Unshielded twisted pair (UTP) or shielded twisted pair (STP)

cables with RJ-45 connectors; Category 3 or better for 10BASE-T, Category
5 or better for 100BASE-TX, and Category 5, 5e or 6 for 1000BASE-T.

Protection from radio frequency interference emissions

Electrical surge suppression

Separation of electrical wires (switch related or other) and electromagnetic

fields from data based network wiring

Safe connections with no damaged cables, connectors or shields

Figure 10: RJ-45 Connections

RJ-45 Connector

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Equipment Checklist

– 39 –

EQUIPMENT CHECKLIST

After unpacking this switch, check the contents to be sure you have received all
the components. Then, before beginning the installation, be sure you have all
other necessary installation equipment.

PACKAGE CONTENTS

Managed 26-Port FE Switch (DG-FS4526E)

RJ-45 to DB-9 console cable

Four adhesive foot pads

Grounding screw

Bracket Mounting Kit, containing two brackets and eight screws for

attaching the brackets to the switch

Power Cord

CD with Installation Guide and Management Guide

OPTIONAL RACK-MOUNTING EQUIPMENT

If you plan to rack-mount the switch, be sure to have the following equipment
available:

Four mounting screws for each device you plan to install in a rack—these

are not included

A screwdriver (Phillips or flathead, depending on the type of screws used)

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Mounting

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MOUNTING

The switch can be mounted in a standard 19-inch equipment rack, on a desktop
or shelf, or on a wall. Mounting instructions for each type of site follow.

RACK MOUNTING

Before rack mounting the switch, pay particular attention to the following
factors:

Temperature: Since the temperature within a rack assembly may be higher

than the ambient room temperature, check that the rack-environment
temperature is within the specified operating temperature range. (See

page 65.)

Mechanical Loading: Do not place any equipment on top of a rack-mounted

unit.

Circuit Overloading: Be sure that the supply circuit to the rack assembly is

not overloaded.

Grounding: Rack-mounted equipment should be properly grounded.

Particular attention should be given to supply connections other than direct
connections to the mains.

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Mounting

– 41 –

To rack-mount devices:

1. Attach the brackets to the device using the screws provided in the Bracket

Mounting Kit.

Figure 11: Attaching the Brackets

2. Mount the device in the rack, using four rack-mounting screws (not

provided). Be sure to secure the lower rack-mounting screws first to
prevent the brackets being bent by the weight of the switch.

28

27

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Mounting

– 42 –

Figure 12: Installing the Switch in a Rack

3. If installing a single switch only, turn to "Connecting to a Power Source" on

page 45 at the end of this chapter.

4. If installing multiple switches, mount them in the rack, one below the other.

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Mounting

– 43 –

DESKTOP OR SHELF MOUNTING

To attach the switch to a vertical surface:

1. Attach the four adhesive feet to the bottom of the first switch.

Figure 13: Attaching the Adhesive Feet

2. Set the device on a flat surface near an AC power source, making sure there

are at least two inches of space on all sides for proper air flow.

3. If installing a single switch only, go to "Connecting to a Power Source" on

page 45, at the end of this chapter.

4. If installing multiple switches, attach four adhesive feet to each one. Place

each device squarely on top of each other, in any order.

DG-FS4526E

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Installing an Optional SFP Transceiver

– 44 –

INSTALLING AN OPTIONAL SFP TRANSCEIVER

Figure 14: Inserting an SFP Transceiver into a Slot

The SFP slots support the following optional SFP transceivers:

1000BASE-SX

1000BASE-LX

1000BASE-LH

100BASE- FX

To install an SFP transceiver, do the following:

1. Consider network and cabling requirements to select an appropriate SFP

transceiver type.

2. Insert the transceiver with the optical connector facing outward and the slot

connector facing down. Note that SFP transceivers are keyed so they can
only be installed in one orientation.

3. Slide the SFP transceiver into the slot until it clicks into place.

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Connecting to a Power Source

– 45 –

CONNECTING TO A POWER SOURCE

To connect a switch to a power source:

1. Insert the power cable plug directly into the AC inlet located at the back of

the switch.

Figure 15: Power Inlet

2. Plug the other end of the cable into a grounded, 3-pin, AC power source.

3. Check the front-panel LEDs as the device is powered on to be sure the

Power LED is on green. If not, check that the power cable is correctly
plugged in.

N

OTE

:

SFP transceivers are hot-swappable. The switch does not need to
be powered off before installing or removing a transceiver. However,
always first disconnect the network cable before removing a
transceiver.

N

OTE

:

SFP transceivers are not provided in the switch package.

N

OTE

:

For International use, you may need to change the AC line cord.
You must use a line cord set that has been approved for the socket type
in your country.

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Connecting to the Console Port

– 46 –

CONNECTING TO THE CONSOLE PORT

This port is used to connect a console device to the access point through a serial
cable. The console device can be a PC or workstation running a VT-100 terminal
emulator, or a VT-100 terminal. A crossover RJ-45 to DB-9 cable is supplied with
the unit for connecting to the console port, as illustrated below. The PIN
assignments used to connect to the serial port are described below.

Figure 16: Console Cable

WIRING MAP FOR SERIAL CABLE

Table 4: Serial Cable Wiring

Switch’s 9-Pin
Serial Port

Null Modem PC’s 9-Pin

DTE Port

2 RXD (receive data) <--------------------- 3 TXD (transmit data)

3 TXD (transmit data) ---------------------> 2 RXD (receive data)

5 SGND (signal ground) ----------------------- 5 SGND (signal ground)

No other pins are used.

1

5

6 9

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Connecting to the Console Port

– 47 –

The serial port’s configuration requirements are as follows:

Default Baud rate—115,200 bps

Character Size—8 Characters

Parity—None

Stop bit—One

Data bits—8

Flow control—none

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Connecting to the Console Port

– 48 –

– 49 –

4 MAKING NETWORK CONNECTIONS

CONNECTING NETWORK DEVICES

This switch is designed to be connected to 10, 100, or 1000 Mbps network cards
in PCs and servers, as well as to other switches and hubs. It may also be
connected to remote devices using optional 1000BASE-SX, 1000BASE-LX,
1000BASE-LH, or 100BASE-FX SFP transceivers.

TWISTED-PAIR DEVICES

Each device requires an unshielded twisted-pair (UTP) cable with RJ-45
connectors at both ends. Use Category 5, 5e, or 6 cable for 1000BASE-T
connections, Category 5 or better for 100BASE-TX connections, and Category 3
or better for 10BASE-T connections.

CABLING GUIDELINES

The RJ-45 ports on the switches support automatic MDI/MDI-X pinout
configuration, so you can use standard straight-through twisted-pair cables to
connect to any other network device (PCs, servers, switches, routers, or hubs).

See "Cables and Pinouts" on page 59 for further information on cabling.

C

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:

Do not plug a phone jack connector into an RJ-45 port. This
will damage the switch. Use only twisted-pair cables with RJ-45
connectors that conform to FCC standards.

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Twisted-Pair Devices

– 50 –

CONNECTING TO PCS, SERVERS, HUBS AND SWITCHES

1. Connect one end of a twisted-pair cable segment to the device’s RJ-45

connector.

Figure 17: Making Twisted-Pair Connections

2. If the device is a network card and the switch is in the wiring closet, attach

the other end of the cable segment to a modular wall outlet that is
connected to the wiring closet. (See the section "Network Wiring

Connections" on page 51.) Otherwise, attach the other end to an available

port on the switch.

Make sure each twisted pair cable does not exceed 100 meters (328 ft) in
length.

3. As each connection is made, the Link LED (on the switch) corresponding to

each port will turn on (green or amber) to indicate that the connection is
valid.

N

OTE

:

Avoid using flow control on a port connected to a hub unless it is
actually required to solve a problem. Otherwise back pressure jamming
signals may degrade overall performance for the segment attached to
the hub.

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Twisted-Pair Devices

– 51 –

NETWORK WIRING CONNECTIONS

Today, the punch-down block is an integral part of many of the newer equipment
racks. Actually it is a part of the patch panel. Instructions for making
connections in the wiring closet with this type of equipment follows.

1. Attach one end of a patch cable to an available port on the switch, and the

other end to the patch panel.

2. If not already in place, attach one end of a cable segment to the back of the

patch panel where the punch-down block is located, and the other end to a
modular wall outlet.

3. Label the cables to simplify future troubleshooting. See "Cable Labeling and

Connection Records" on page 56.

Figure 18: Network Wiring Connections

Equipment Rack
(side view)

Switch

Patch Panel

Punch-Down Block

Wall

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Fiber Optic SFP Devices

– 52 –

FIBER OPTIC SFP DEVICES

An optional Gigabit SFP (1000BASE-SX, 1000BASE-LX, 1000BASE-LH, or
100BASE-FX) transceiver can be used for a backbone connection between
switches, or for connecting to a high-speed server.

Each single-mode fiber port requires 9/125 micron single-mode fiber optic cable
with an LC connector at both ends. Each multimode fiber optic port requires 50/
125 or 62.5/125 micron multimode fiber optic cabling with an LC connector at
both ends.

1. Remove and keep the LC port’s rubber plug. When not connected to a fiber

cable, the rubber plug should be replaced to protect the optics.

2. Check that the fiber terminators are clean. You can clean the cable plugs by

wiping them gently with a clean tissue or cotton ball moistened with a little
ethanol. Dirty fiber terminators on fiber optic cables will impair the quality
of the light transmitted through the cable and lead to degraded performance
on the port.

3. Connect one end of the cable to the LC port on the switch and the other end

to the LC port on the other device. Since LC connectors are keyed, the cable
can be attached in only one orientation.

W

ARNING

:

This switch uses lasers to transmit signals over fiber optic
cable. The lasers are compliant with the requirements of a Class 1
Laser Product and are inherently eye safe in normal operation.
However, you should never look directly at a transmit port when it is
powered on.

W

ARNING

:

When selecting a fiber SFP device, considering safety, please
make sure that it can function at a temperature that is not less than the
recommended maximum operational temperature of the product. You
must also use an approved Laser Class 1 SFP transceiver.

C

HAPTER

4

| Making Network Connections

Fiber Optic SFP Devices

– 53 –

Figure 19: Making Fiber Port Connections

4. As a connection is made, check the Link LED on the switch corresponding to

the port to be sure that the connection is valid.

The 1000BASE-SX, 1000BASE-LX, 1000BASE-LH fiber optic ports operate at 1
Gbps, full duplex, with auto-negotiation of flow control. The maximum length for
fiber optic cable operating at Gigabit speed will depend on the fiber type as listed
under "1000 Mbps Gigabit Ethernet Collision Domain" on page 54.

The 100BASE-FX fiber optic ports operate at 100 Mbps, full duplex, with auto­negotiation of flow control. The maximum length for fiber cable operating at 100
Mbps is listed under "100 Mbps Fast Ethernet Collision Domain" on page 55.

C

HAPTER

4

| Making Network Connections

Connectivity Rules

– 54 –

CONNECTIVITY RULES

When adding hubs (repeaters) to your network, please follow the connectivity
rules listed in the manuals for these products. However, note that because
switches break up the path for connected devices into separate collision
domains, you should not include the switch or connected cabling in your
calculations for cascade length involving other devices.

1000BASE-T CABLE REQUIREMENTS

All Category 5 UTP cables that are used for 100BASE-TX connections should also
work for 1000BASE-T, providing that all four wire pairs are connected. However,
it is recommended that for all critical connections, or any new cable installations,
Category 5e (enhanced Category 5) or Category 6 cable should be used. The
Category 5e and 6 specifications include test parameters that are only
recommendations for Category 5. Therefore, the first step in preparing existing
Category 5 cabling for running 1000BASE-T is a simple test of the cable
installation to be sure that it complies with the IEEE 802.3-2005 standards.

1000 MBPS GIGABIT ETHERNET COLLISION DOMAIN

Table 5: Maximum 1000BASE-T Gigabit Ethernet Cable Length

Cable Type Maximum Cable Length Connector

Category 5, 5e, or 6 100-ohm UTP or STP 100 m (328 ft) RJ-45

Table 6: Maximum 1000BASE-SX Gigabit Ethernet Cable Lengths

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

62.5/125 micron
multimode fiber

160 MHz/km 2-220 m (7-722 ft) LC

200 MHz/km 2-275 m (7-902 ft) LC

50/125 micron
multimode fiber

400 MHz/km 2-500 m (7-1641 ft) LC

500 MHz/km 2-550 m (7-1805 ft) LC

C

HAPTER

4

| Making Network Connections

Connectivity Rules

– 55 –

100 MBPS FAST ETHERNET COLLISION DOMAIN

10 MBPS ETHERNET COLLISION DOMAIN

Table 7: Maximum 1000BASE-LX Gigabit Ethernet Cable Length

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

9/125 micron single­mode fiber

N/A 2 m - 5 km (7 ft - 3.2 miles) LC

Table 8: Maximum 1000BASE-LH Gigabit Ethernet Cable Length

Fiber Size Fiber Bandwidth Maximum Cable Length Connector

9/125 micron single­mode fiber

N/A 2 m - 80 km

(7 ft - 50 miles)

LC

Table 9: Maximum 100BASE-FX Cable Length

Type Cable Type Max. Cable Length Connector

100BASE-FX 9/125 micron single-mode

fiber

2 m - 20 km
(7ft - 12.43 miles)

LC

62.5/125 or 50/125
multimode fiber

up to 2 km (1.24 miles) LC

Table 10: Maximum Fast Ethernet Cable Lengths

Type Cable Type Max. Cable Length Connector

100BASE-TX Category 5 or better 100-ohm

UTP or STP

100 m (328 ft) RJ-45

Table 11: Maximum Ethernet Cable Length

Type Cable Type Max. Cable Length Connector

10BASE-T Category 3 or better 100-ohm UTP 100 m (328 ft) RJ-45

C

HAPTER

4

| Making Network Connections

Cable Labeling and Connection Records

– 56 –

CABLE LABELING AND CONNECTION RECORDS

When planning a network installation, it is essential to label the opposing ends of
cables and to record where each cable is connected. Doing so will enable you to
easily locate inter-connected devices, isolate faults and change your topology
without need for unnecessary time consumption.

To best manage the physical implementations of your network, follow these
guidelines:

Clearly label the opposing ends of each cable.

Using your building’s floor plans, draw a map of the location of all network-

connected equipment. For each piece of equipment, identify the devices to
which it is connected.

Note the length of each cable and the maximum cable length supported by

the switch ports.

For ease of understanding, use a location-based key when assigning

prefixes to your cable labeling.

Use sequential numbers for cables that originate from the same equipment.

Differentiate between racks by naming accordingly.

Label each separate piece of equipment.

Display a copy of your equipment map, including keys to all abbreviations at

each equipment rack.

– 57 –

A TROUBLESHOOTING

DIAGNOSING SWITCH INDICATORS

Table 12: Troubleshooting Chart

Symptom Action

Power LED is Off

Check connections between the switch, the power cord and

the wall outlet.

Contact your dealer for assistance.

Diag LED is Flashing
Amber

Power cycle the switch to try and clear the condition.
If the condition does not clear, contact your dealer for

assistance.

Link LED is Off

Verify that the switch and attached device are powered on.
Be sure the cable is plugged into both the switch and

corresponding device.

If the switch is installed in a rack, check the connections to

the punch-down block and patch panel.

Verify that the proper cable type is used and its length does

not exceed specified limits.

Check the adapter on the attached device and cable

connections for possible defects. Replace the defective
adapter or cable if necessary.

A

PPENDIX

A

| Troubleshooting

Power and Cooling Problems

– 58 –

POWER AND COOLING PROBLEMS

If the power indicator does not turn on when the power cord is plugged in, you
may have a problem with the power outlet, power cord, or internal power
supply. However, if the unit powers off after running for a while, check for loose
power connections, power losses or surges at the power outlet. If you still
cannot isolate the problem, the internal power supply may be defective.

INSTALLATION

Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (such as the power cord or network
cabling), test them in an alternate environment where you are sure that all the
other components are functioning properly.

IN-BAND ACCESS

You can access the management agent in the switch from anywhere within the
attached network using Telnet, a web browser, or other network management
software tools. However, you must first configure the switch with a valid IP
address, subnet mask, and default gateway. If you have trouble establishing a
link to the management agent, check to see if you have a valid network
connection. Then verify that you entered the correct IP address. Also, be sure
the port through which you are connecting to the switch has not been disabled.
If it has not been disabled, then check the network cabling that runs between
your remote location and the switch.

N

OTE

:

The management agent accepts up to four simultaneous Telnet
sessions. If the maximum number of sessions already exists, an
additional Telnet connection will not be able to log into the system.

– 59 –

B CABLES AND PINOUTS

TWISTED-PAIR CABLE AND PIN ASSIGNMENTS

For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of
wires. For 1000BASE-T connections the twisted-pair cable must have four pairs
of wires. Each wire pair is identified by two different colors. For example, one
wire might be green and the other, green with white stripes. Also, an RJ-45
connector must be attached to both ends of the cable.

The figure below illustrates how the pins on the RJ-45 connector are numbered.
Be sure to hold the connectors in the same orientation when attaching the wires
to the pins.

Figure 20: RJ-45 Connector Pin Numbers

N

OTE

:

Each wire pair must be attached to the RJ-45 connectors in a
specific orientation.

C

AUTION

:

DO NOT plug a phone jack connector into any RJ-45 port. Use
only twisted-pair cables with RJ-45 connectors that conform with FCC
standards.

8

1

1

8

A

PPENDIX

B

| Cables and Pinouts

Twisted-Pair Cable and Pin Assignments

– 60 –

10BASE-T/100BASE-TX PIN ASSIGNMENTS

Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45
connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or
100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure

that

the length of any twisted-pair connection does not exceed 100 meters (328 feet).

The RJ-45 ports on the switch base unit support automatic MDI/MDI-X
operation, so you can use straight-through cables for all network connections to
PCs or servers, or to other switches or hubs. In straight-through cable, pins 1, 2,
3, and 6, at one end of the cable, are connected straight through to pins 1, 2, 3,
and 6 at the other end of the cable. When using any RJ-45 port on this switch,
you can use either straight-through or crossover cable.

Note: The “+” and “-” signs represent the polarity of the wires that

make up each wire pair.

STRAIGHT-THROUGH WIRING

If the twisted-pair cable is to join two ports and only one of the ports has an
internal crossover (MDI-X), the two pairs of wires must be straight-through.
(When auto-negotiation is enabled for any RJ-45 port on this switch, you can
use either straight-through or crossover cable to connect to any device type.)

You must connect all four wire pairs as shown in the following diagram to
support Gigabit Ethernet.

Table 13: 10/100BASE-TX MDI and MDI-X Port Pinouts

Pin MDI Signal Name MDI-X Signal Name

1 Transmit Data plus (TD+) Receive Data plus (RD+)

2 Transmit Data minus (TD-) Receive Data minus (RD-)

3 Receive Data plus (RD+) Transmit Data plus (TD+)

6 Receive Data minus (RD-) Transmit Data minus (TD-)

4,5,7,8 Not used Not used

A

PPENDIX

B

| Cables and Pinouts

Twisted-Pair Cable and Pin Assignments

– 61 –

Figure 21: Straight-through Wiring

CROSSOVER WIRING

If the twisted-pair cable is to join two ports and either both ports are labeled
with an “X” (MDI-X) or neither port is labeled with an “X” (MDI), a crossover
must be implemented in the wiring. (When auto-negotiation is enabled for any
RJ-45 port on this switch, you can use either straight-through or crossover cable
to connect to any device type.)

You must connect all four wire pairs as shown in the following diagram to
support Gigabit Ethernet.

Figure 22: Crossover Wiring

White/Orange Stripe

Orange

White/Green Stripe

Green

1
2
3
4
5
6
7
8

1
2
3
4
5
6
7
8

EIA/TIA 568B RJ-45 Wiring Standard

10/100BASE-TX Straight-through Cable

End A

End B

Blue

White/Blue Stripe

Brown

White/Brown Stripe

White/Orange Stripe

Orange

White/Green Stripe

1
2
3
4
5
6
7
8

1
2
3
4
5
6
7
8

EIA/TIA 568B RJ-45 Wiring Standard

10/100BASE-TX Crossover Cable

End A

End B

Green

Blue

White/Blue Stripe

Brown

White/Brown Stripe

A

PPENDIX

B

| Cables and Pinouts

Twisted-Pair Cable and Pin Assignments

– 62 –

1000BASE-T PIN ASSIGNMENTS

All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use
straight-through cables for all network connections to PCs or servers, or to other
switches or hubs.

The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These
ports require that all four pairs of wires be connected. Note that for 1000BASE-T
operation, all four pairs of wires are used for both transmit and receive.

Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable for 1000BASE-T connections. Also be sure

that the

length of any twisted-pair connection does not exceed 100 meters (328 feet)

.

CABLE TESTING FOR EXISTING CATEGORY 5 CABLE

Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk
(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified
in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test
parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These
tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional
Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”

Note that when testing your cable installation, be sure to include all patch cables
between switches and end devices.

Table 14: 1000BASE-T MDI and MDI-X Port Pinouts

Pin MDI Signal Name MDI-X Signal Name

1 Bi-directional Pair A Plus (BI_DA+) Bi-directional Pair B Plus (BI_DB+)

2 Bi-directional Pair A Minus (BI_DA-) Bi-directional Pair B Minus (BI_DB-)

3 Bi-directional Pair B Plus (BI_DB+) Bi-directional Pair A Plus (BI_DA+)

4 Bi-directional Pair C Plus (BI_DC+) Bi-directional Pair D Plus (BI_DD+)

5 Bi-directional Pair C Minus (BI_DC-) Bi-directional Pair D Minus (BI_DD-)

6 Bi-directional Pair B Minus (BI_DB-) Bi-directional Pair A Minus (BI_DA-)

7 Bi-directional Pair D Plus (BI_DD+) Bi-directional Pair C Plus (BI_DC+)

8 Bi-directional Pair D Minus (BI_DD-) Bi-directional Pair C Minus (BI_DC-)

A

PPENDIX

B

| Cables and Pinouts

Fiber Standards

– 63 –

ADJUSTING EXISTING CATEGORY 5 CABLING TO RUN 1000BASE-T

If your existing Category 5 installation does not meet one of the test parameters
for 1000BASE-T, there are basically three measures that can be applied to try
and correct the problem:

1. Replace any Category 5 patch cables with high-performance Category 5e or

Category 6 cables.

2. Reduce the number of connectors used in the link.

3. Reconnect some of the connectors in the link.

FIBER STANDARDS

The International Telecommunication Union (ITU-T) has standardized various
fiber types for data networks. These are summarized in the following table.

Table 15: Fiber Standards

ITU-T
Standard

Description Application

G.651 Multimode Fiber

50/125-micron core

Short-reach connections in the 1300­nm or 850-nm band

G.652 Non-Dispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach.
Optimized for operation in the 1310­nm band. but can also be used in the
1550-nm band

G.652.C Low Water Peak Non-

Dispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach.
Optimized for wavelength-division
multiplexing (WDM) transmission
across wavelengths from 1285 to
1625 nm. The zero dispersion
wavelength is in the 1310-nm region.

G.653 Dispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach.
Optimized for operation in the region
from 1500 to 1600-nm.

A

PPENDIX

B

| Cables and Pinouts

Fiber Standards

– 64 –

G.654 1550-nm Loss-Minimized Fiber

Single-mode, 9/125-micron core

Extended long-haul applications.
Optimized for high-power
transmission in the 1500 to 1600-nm
region, with low loss in the 1550-nm
band.

G.655 Non-Zero Dispersion-Shifted

Fiber

Single-mode, 9/125-micron core

Extended long-haul applications.
Optimized for high-power dense
wavelength-division multiplexing
(DWDM) operation in the region from
1500 to 1600-nm.

Table 15: Fiber Standards (Continued)

ITU-T
Standard

Description Application

– 65 –

C HARDWARE SPECIFICATIONS

PHYSICAL CHARACTERISTICS

PORTS

24 10/100BASE-TX ports, with auto-negotiation
2 10/100/1000BASE-T shared with two SFP transceiver slots

NETWORK INTERFACE

Ports 1-24: RJ-45 connector, auto MDI/X

10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better)
100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better)
*Maximum Cable Length - 100 m (328 ft)

Ports 25-26: RJ-45 connector, auto MDI/X

10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better)
100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better)
1000BASE-T: RJ-45 (100-ohm, UTP or STP cable; Category 5, 5e or 6)
*Maximum Cable Length - 100 m (328 ft)

BUFFER ARCHITECTURE

4M bits

AGGREGATE BANDWIDTH

8.8 Gbps

SWITCHING DATABASE

8K MAC address entries

A

PPENDIX

C

| Hardware Specifications

Physical Characteristics

– 66 –

LEDS

System: Power, Diag (Diagnostic),
Port: status (link, speed and activity)

WEIGHT

1.7 kg (3.18 lbs)

SIZE

44.0 x 21.0 x 4.4 cm (17.32 x 8.27 x 1.73 in.)

TEMPERATURE

Operating: 0 to 50 °C (32 to 122 °F)
Storage: -40 to 70 °C (-40 to 158 °F)

HUMIDITY

Operating: 10% to 90% (non-condensing)

AC INPUT

100 to 240 V, 50-60 Hz, 0.3A

POWER SUPPLY

Internal, auto-ranging SMPS: AC 100-240V, 50-60Hz

POWER CONSUMPTION

17 Watts (Maximum power consumption from AC inlet)

MAXIMUM CURRENT

0.3 A @ 100 VAC

0.2 A @ 240 VAC

A

PPENDIX

C

| Hardware Specifications

Switch Features

– 67 –

SWITCH FEATURES

FORWARDING MODE

Store-and-forward

THROUGHPUT

Wire speed

FLOW CONTROL

Full Duplex: IEEE 802.3x
Half Duplex: Back pressure

MANAGEMENT FEATURES

IN-BAND MANAGEMENT

Web, Telnet, SSH, or SNMP manager

OUT-OF-BAND MANAGEMENT

RJ-45 console port

SOFTWARE LOADING

HTTP, HTTPS, TFTP in-band, or XModem out-of-band

A

PPENDIX

C

| Hardware Specifications

Management Features

– 68 –

– 69 –

GLOSSARY

10BASE-T

IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or
5 UTP cable.

100BASE-FX

IEEE 802.3 specification for 100 Mbps Ethernet over two strands of 50/125,

62.5/125 micron, or 9/125 micron core fiber cable.

100BASE-TX

IEEE 802.3u specification for 100 Mbps Ethernet over two pairs of Category 5
UTP cable.

1000BASE-LH

Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron
core fiber cable.

1000BASE-LX

IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125, 62.5/
125 or 9/125 micron core fiber cable.

1000BASE-SX

IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or

62.5/125 micron core fiber cable.

1000BASE-T

IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5, 5e or
6 twisted-pair cable (using all four wire pairs).

G

LOSSARY

– 70 –

AUTO-NEGOTIATION

Signalling method allowing each node to select its optimum operational mode
(e.g., speed and duplex mode) based on the capabilities of the node to which it
is connected.

BANDWIDTH

The difference between the highest and lowest frequencies available for network
signals. Also synonymous with wire speed, the actual speed of the data
transmission along the cable.

COLLISION DOMAIN

Single CSMA/CD LAN segment.

CSMA/CD

CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication
method employed by Ethernet, Fast Ethernet, and Gigabit Ethernet.

END STATION

A workstation, server, or other device that does not forward traffic.

ETHERNET

A network communication system developed and standardized by DEC, Intel,
and Xerox, using baseband transmission, CSMA/CD access, logical bus topology,
and coaxial cable. The successor IEEE 802.3 standard provides for integration
into the OSI model and extends the physical layer and media with repeaters and
implementations that operate on fiber, thin coax and twisted-pair cable.

FAST ETHERNET

A 100 Mbps network communication system based on Ethernet and the CSMA/
CD access method.

FULL DUPLEX

Transmission method that allows two network devices to transmit and receive
concurrently, effectively doubling the bandwidth of that link.

G

LOSSARY

– 71 –

GIGABIT ETHERNET

A 1000 Mbps network communication system based on Ethernet and the CSMA/
CD access method.

IEEE

Institute of Electrical and Electronic Engineers.

IEEE 802.3

Defines carrier sense multiple access with collision detection (CSMA/CD) access
method and physical layer specifications.

IEEE 802.3AB

Defines CSMA/CD access method and physical layer specifications for
1000BASE-T Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3U

Defines CSMA/CD access method and physical layer specifications for 100BASE­TX Fast Ethernet. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3X

Defines Ethernet frame start/stop requests and timers used for flow control on
full-duplex links. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3Z

Defines CSMA/CD access method and physical layer specifications for 1000BASE
Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)

LAN SEGMENT

Separate LAN or collision domain.

LED

Light emitting diode used for monitoring a device or network condition.

G

LOSSARY

– 72 –

LOCAL AREA NETWORK (LAN)

A group of interconnected computer and support devices.

MEDIA ACCESS CONTROL (MAC)

A portion of the networking protocol that governs access to the transmission
medium, facilitating the exchange of data between network nodes.

MIB

An acronym for Management Information Base. It is a set of database objects
that contains information about the device.

RJ-45 CONNECTOR

A connector for twisted-pair wiring.

STP

Shielded Twisted Pair.

SMPS

Switching Mode Power Supply.

SWITCHED PORTS

Ports that are on separate collision domains or LAN segments.

TIA

Telecommunications Industry Association

UTP

Unshielded twisted-pair cable.

G

LOSSARY

– 73 –

VIRTUAL LAN (VLAN)

A Virtual LAN is a collection of network nodes that share the same collision
domain regardless of their physical location or connection point in the network.
A VLAN serves as a logical workgroup with no physical barriers, allowing users to
share information and resources as though located on the same LAN.

G

LOSSARY

– 74 –

– 75 –

INDEX

NUMERICS

10 Mbps connectivity rules 55
100 Mbps connectivity rules 55
1000 Mbps connectivity rules 54
1000BASE-LH fiber cable Lengths 55
1000BASE-LX fiber cable Lengths 55
1000BASE-SX fiber cable Lengths 54
1000BASE-T

pin assignments

62

100BASE-TX, cable lengths 55
10BASE-T, cable lengths 55

A

applications

central wiring closet

35

collapsed backbone 32
remote connections with fiber 35, 36
VLAN connections 35

B

buffer size 65

C

cable

Ethernet cable compatibility

38

fiber standards 63
labeling and connection records 56
lengths 55

connectivity rules

10 Mbps

55

100 Mbps 55

1000 Mbps 54
console port, pin assignments 46
contents of package 39
cooling problems 58
cord sets, international 45

D

desktop mounting 44

E

electrical interference, avoiding 37

equipment checklist 39
Ethernet connectivity rules 55

F

Fast Ethernet connectivity rules 55
features 67
front panel of switch 11
full duplex connectivity 31

G

Gigabit Ethernet cable lengths 54
grounding for racks 40

I

indicators, LED 14
installation

connecting devices to the switch

50

desktop or shelf mounting 44
network wiring connections 51
port connections 49, 52
power requirements 37
problems 58
rack mounting 40
site requirements 37

L

laser safety 52
LC port connections 52
location requirements 37

M

management

agent

12

features 67
SNMP 12

mounting the switch

in a rack

40

on a desktop or shelf 44

I

NDEX

– 76 –

N

network

connections

49, 52

examples 32

P

package contents 39
pin assignments 59

1000BASE-T 62

10BASE-T/100BASE-TX 60

console port 46
ports, connecting to 49, 52
power, connecting to 45

R

rack mounting 40
rear panel of switch 11
RJ-45 port

connections

49

pinouts 62

S

screws for rack mounting 39
SFP transceiver slots 13
site selelction 37
SNMP agent 12
specifications

environmental

66

power 66
status LEDs 14
switch architecture 12

T

Telnet 58
temperature within a rack 40
troubleshooting

in-band access

58

power and cooling problems 58

stack troubleshooting 58
twisted-pair connections 49

V

VLANS, tagging 35

DG-FS4526E

E042012

HW-R01

S

ECTION

|

– 78 –