Planex FMS-24K User Manual [en, de]

24 Port 10/100Mbps Switch

FMS-24K

Installation Guide

24-Port Fast Ethernet Switch

Intelligent Fast Ethernet Switch
with 24 10BASE-T / 100BASE-TX (RJ-45) Ports,
and 2 Slots for 100BASE-FX or Gigabit Uplink Modules

i

Compliances

FCC - Class A

This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause interference to
radio communications. It has been tested and found to comply with the limits for a Class A
computing device pursuant to Subpart B 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, in which case the user, at his own expense, will be required to take whatever
measures may be required to correct the interference. You are cautioned that changes or
modifications not expressly approved by the party responsible for compliance could void
your authority to operate the equipment.

You may use unshielded twisted-pair (UTP) for RJ-45 connections - Category 3 or greater
for 10 Mbps connections, Category 5 for 100 Mbps connections, Category 5, 5e, or 6 for
1000 Mbps connections. For fiber optic connections, you may use 50/125 or 62.5/125
micron multimode fiber or 9/125 micron single-mode fiber.

Warnings: 1. Wear an anti-static wrist strap or take other suitable measures to prevent

electrostatic discharge when handling this equipment.

2. When connecting this hub to a power outlet, connect the field ground lead
on the tri-pole power plug to a valid earth ground line to prevent electrical
hazards.

Industry Canada - Class A

This digital apparatus does not exceed the Class A limits for radio noise emissions from
digital apparatus as set out in the interference-causing equipment standard entitled
“Digital Apparatus,” ICES-003 of the Department of Communications.

Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux
appareils numériques de Classe A prescrites dans la norme sur le matériel brouilleur:
“Appareils Numériques,” NMB-003 édictée par le ministère des Communications.

Japan VCCI Class A

ii

CE Mark Declaration of Conformance for EMI and Safety (EEC)

This information technology equipment complies with the requirements of the Council
Directive 89/336/EEC on the Approximation of the laws of the Member States relating to
Electromagnetic Compatibility and 73/23/EEC for electrical equipment used within certain
voltage limits and the Amendment Directive 93/68/EEC. For the evaluation of the
compliance with these Directives, the following standards were applied:

Warning! Do not plug a phone jack connector in the RJ-45 port. This may damage this
device. Les raccordeurs ne sont pas utilisé pour le système téléphonique!

Taiwan BSMI Class A

Australia AS/NZS 3548 (1995) - Class A

RFI Emission: • Limit class A according to EN 55022:1998

• Limit class A for harmonic current emission according to EN 61000-3-2/1995

• Limitation of voltage fluctuation and flicker in low-voltage supply system
according to EN 61000-3-3/1995

Immunity: • Product family standard according to EN 55024:1998

• Electrostatic Discharge according to EN 61000-4-2:1995
(Contact Discharge: ±4 kV, Air Discharge: ±8 kV)

• Radio-frequency electromagnetic field according to EN 61000-4-3:1996
(80 - 1000 MHz with 1 kHz AM 80% Modulation: 3 V/m)

• Electrical fast transient/burst according to EN 61000-4-4:1995 (AC/DC power
supply: ±1 kV, Data/Signal lines: ±0.5 kV)

• Surge immunity test according to EN 61000-4-5:1995
(AC/DC Line to Line: ±1 kV, AC/DC Line to Earth: ±2 kV)

• Immunity to conducted disturbances, Induced by radio-frequency fields:
EN 61000-4-6:1996 (0.15 - 80 MHz with 1 kHz AM 80% Modulation: 3 V/m)

• Power frequency magnetic field immunity test according to
EN 61000-4-8:1993
(1 A/m at frequency 50 Hz)

• Voltage dips, short interruptions and voltage variations immunity test
according to EN 61000-4-11:1994 (>95% Reduction @10 ms, 30%
Reduction @500 ms, >95% Reduction @5000 ms)

LVD: • EN 60950 (A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)

ACN 066 352 010

iii

Safety Compliance

Warning: Fiber Optic Port Safety

Avertissment: Ports pour fibres optiques - sécurité sur le plan optique

Warnhinweis: Faseroptikanschlüsse - Optische Sicherheit

Underwriters Laboratories Compliance Statement

Important! Before making connections, make sure you have the correct cord set. Check

it (read the label on the cable) against the following:

The unit automatically matches the connected input voltage. Therefore, no additional
adjustments are necessary when connecting it to any input voltage within the range
marked on the rear panel.

Wichtige Sicherheitshinweise (Germany)

1. Bitte lesen Sie diese Hinweise sorgfältig durch.

2. Heben Sie diese Anleitung für den späteren Gebrauch auf.

3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine
Flüssigoder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur

When using a fiber optic port, never look at the transmit laser while it is
powered on. Also, never look directly at the fiber TX port and fiber cable
ends when they are powered on.

Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez
jamais directement le port TX (Transmission) à fibres optiques et les
embouts de câbles à fibres optiques tant qu'ils sont sous tension.

Niemals ein Übertragungslaser betrachten, während dieses
eingeschaltet ist. Niemals direkt auf den Faser-TX-Anschluß
und auf die Faserkabelenden schauen, während diese
eingeschaltet sind.

Operating Voltage Cord Set Specifications

120 Volts UL Listed/CSA Certified Cord Set

Minimum 18 AWG

Type SVT or SJT three conductor cord

Maximum length of 15 feet

Parallel blade, grounding type attachment plug rated 15A, 125V

240 Volts (Europe only) Cord Set with H05VV-F cord having three conductors with

minimum diameter of 0.75 mm

2

IEC-320 receptacle

Male plug rated 10A, 250V

CLASS I

LASER DEVICE

DISPOSITIF LASER

DE CLASSE I

LASERGER
DER KLASSE I

ÄT

iv

Reinigung.

4. Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.

5. Das Gerät ist vor Feuchtigkeit zu schützen.

6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen
könnte Beschädigungen hervorrufen.

7. Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung schützt.
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.

8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.

9. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch
nichts auf der Leitung abgestellt werden.

10. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.

11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.

12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät
gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.

13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur
von authorisiertem Servicepersonal geöffnet werden.

14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer
qualifizierten Servicestelle zu überprüfen:

a. Netzkabel oder Netzstecker sind beschädigt.
b. Flüssigkeit ist in das Gerät eingedrungen.
c. Das Gerät war Feuchtigkeit ausgesetzt.
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit

Hilfe dieser Anleitung keine Verbesserung erzielen.
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.

15. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden. Für einen
Nennstrom bis 6A und einem Gerätegewicht größer 3kg ist eine Leitung nicht leichter als
H05VV-F, 3G, 0.75mm

2

einzusetzen.

Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70dB(A) oder
weniger.

Contents

v

Contents

Chapter 1: About the Switch 1-1

Overview 1-1

Switch Architecture 1-1
Management Options 1-2

Description of Hardware 1-2

RJ-45 Ports 1-2
Port Status LEDs 1-3
System Status LEDs 1-4
Optional Media Extender Modules 1-5
Power Supply Receptacle 1-8

Features and Benefits 1-9

Connectivity 1-9
Expandability 1-9
Performance 1-9
Management 1-10

Chapter 2: Network Planning 2-1

Introduction to Switching 2-1
Application Examples 2-2

Collapsed Backbone 2-2
Central Wiring Closet 2-3

Making VLAN Connections 2-4
Connectivity Rules 2-5
Application Notes 2-6

Chapter 3: Installing the Switch 3-1

Selecting a Site 3-1
Equipment Checklist 3-1

Package Contents 3-1

Optional Rack-Mounting Equipment 3-2
Mounting 3-2

Rack Mounting 3-2

Desktop or Shelf Mounting 3-3
Installing an Optional Module into the Switch 3-4
Installing a GBIC Transceiver 3-5
Connecting to the Stack’s Backplane 3-6
Connecting to a Power Source 3-7

Chapter 4: Making Network Connections 4-1

Connecting Network Devices 4-1
Twisted-Pair Devices 4-1

Contents

vi

Cabling Guidelines 4-1
Connecting to PCs, Servers, Hubs and Switches 4-2
Wiring Closet Connections 4-2

Fiber Optic Devices 4-4

Appendix A: Troubleshooting A-1

Diagnosing Switch Indicators A-1
Power and Cooling Problems A-1
Installation A-1
In-Band Access A-1

Appendix B: Cables B-1

Specifications B-1
Twisted-Pair Cable and Pin Assignments B-2

10BASE-T/100BASE-TX Pin Assignments B-2
Straight-Through Wiring B-3

Crossover Wiring B-3
1000BASE-T Pin Assignments B-3
1000BASE-T Cable Requirements B-5

Cable Testing for Existing Category 5 Cable B-5

Adjusting Existing Category 5 Cabling B-5
Console Port Pin Assignments B-5

DB-9 Port Pin Assignments B-6

Console Port to 9-Pin DTE Port on PC B-6

Console to 25-Pin DTE Port on PC B-6

Appendix C: Specifications C-1

Physical Characteristics C-1

Base Unit C-1
Switch Features C-2
Management Features C-3
Standards C-3
Compliances C-4
Slide-in Modules C-4

100BASE-FX Extender Modules C-4

1000BASE-T Extender Module C-4

1000BASE-SX Extender Module C-5

1000BASE-LX Extender Module C-5

1000BASE-X GBIC Module C-5

Combo Module C-6

Stacking Module C-6

Glossary

Contents

vii

Index

Contents

viii

1-1

Chapter 1: About the Switch

Overview

This switch is an intelligent Fast Ethernet switch with 24 10BASE-T / 100BASE-TX
(RJ-45) Ports and 2 Slots for 100BASE-FX or Gigabit Uplink Modules. This switch
can easily tame your network with full support for Spanning Tree Protocol, Multicast
Switching, Virtual LANs, and Layer 2/3/4 CoS services.

Figure 1-1. Front and Rear Panels

Switch Architecture

The FMS-24K employs a wire-speed, non-blocking switching fabric. This permits
simultaneous wire-speed transport of multiple packets at low latency on all ports.
This switch also features full-duplex capability on all ports, which effectively doubles
the bandwidth of each connection.

Auto-negotiation is used to select the optimal transmission speed and
communication mode for each connection. With store-and-forward switching and
flow control, maximum data integrity is always maintained, even under heavy
loading.

This switch includes two slots on the front panel for slide-in 1000BASE-LX,
1000BASE-SX, 1000BASE-T, 100BASE-FX, or 1000BASE-X (GBIC) modules.
Cascade connections between switches can be made using these modules.

The switch also supports a stacking module that can be installed into slot Module 2.
The stacking module allows up to eight units to be linked together and managed
from one unit using one IP address.

Media and Stacking Slots

System Indicators

10/100 Mbps RJ-45 Ports

Port Status Indicators (1-24)

Console Port

Module Status Indicators (25/26)

100-240V~
50/60Hz,2A

Power Socket

Module 2 Module 1

About the Switch

1-2

Management Options

This switch contains a comprehensive array of LEDs for “at-a-glance” monitoring of
network and port status. It also includes a management agent that allows you to
configure or monitor the switch using its embedded management software, or via
SNMP applications. To manage the switch, you can make a direct connection to the
RS-232 console port (out-of-band), or you can manage the switch through a network
connection (in-band) using Telnet, the on-board Web agent, or Windows-based
network management software.

The management agent provides a wide range of advanced performance-enhancing
features. Port-based VLANs provide traffic security and efficient use of network
bandwidth. QoS priority queueing ensures the minimum delay for

moving real-time

multimedia data through the switch. Flow control

eliminates the loss of packets due to
bottlenecks caused by port saturation. Port security is provided to filter unwanted
traffic from the switch.

For a detailed description of the switch’s advanced features, refer to the
Management Guide.

Description of Hardware

RJ-45 Ports

The switch base unit contains 24 10BASE-T/100BASE-TX RJ-45 ports. All of these
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.
(See “10BASE-T/100BASE-TX Pin Assignments” on page B-2.)

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
this feature is also supported by the attached device. If a device connected to one of
these ports does not support auto-negotiation, the correct speed will be sensed by
the port, but the transmission mode will default to half duplex.

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

Description of Hardware

1-3

Port Status LEDs

The base unit also 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 1-2. Port Status LEDs

Port Status LEDs

LED Condition Status

Base Unit Ports

1~24
(Link/Activity)

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 There is no valid link on the port.

Module 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 established a valid 1000 Mbps network

connection. Flashing indicates activity.

Off There is no valid link on the port.

About the Switch

1-4

System Status LEDs

Figure 1-3. System Status LEDs

System Status LEDs

LED Condition Status

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

On Amber The unit’s internal power supply has failed.

Off The unit has no power connected.

Diag On Green The system diagnostic test has completed successfully.

Flashing Green The system diagnostic test is in progress.

On Amber The system diagnostic test has detected a fault.

Link N/A This indicator is not currently implemented.

Duplex N/A This indicator is not currently implemented.

Stack

Flashing Amber An initial state of stacking configuration upon powering on.

Green This switch is acting as the master unit in the stack.

Amber This switch is acting as a slave unit in the stack.

Flashing Green

When the user enters the light unit command in the CLI,
the unit ID of each switch in the stack will be displayed by
port LEDs 1 to 8.

Link

Duplex

M1

M2

PWR

Diag

Stack

Module 1

RPU

Description of Hardware

1-5

Optional Media Extender Modules

Optional 1000BASE-T Module

Figure 1-4. Single-Port 1000BASE-T Module

Using Category 5, 5e, or 6 twisted-pair cable you can connect to another device up
to 100 m (328 ft) away. The 1000BASE-T module operates at 10/100/1000 Mbps. At
1000 Mbps it operates at full duplex and supports auto-negotiation of speed and
flow control. At 10/100 Mbps it supports auto-negotiation of speed, duplex mode
(i.e., half or full duplex), and flow control. Note that you should first test the cable
installation for IEEE 802.3ab compliance. See “1000BASE-T Cable Requirements”
on page B-5.

Optional 1000BASE-SX Module

Figure 1-5. Single-Port 1000BASE-SX Gigabit Module

Using multimode fiber optic cable, the 1000BASE-SX port can be connected to a
remote site up to 550 m (1805 ft) away. The 1000BASE-SX Gigabit module operates
at 1 Gbps, with support for full-duplex mode and flow control.

Optional 1000BASE-LX Module

Figure 1-6. Single-Port 1000BASE-LX Gigabit Module

1000BASE-T RJ45 Module

1000BASE-SX Multimode Module

RX

TX

100BASE-FX Singlemode Module

TX

RX

1000BASE-LX Singlemode Module

RX

TX

About the Switch

1-6

Using single-mode fiber optic cable, the 1000BASE-LX port can be connected to a
remote site up to 5 km (16404 ft) away. The 1000BASE-LX Gigabit module operates
at 1 Gbps, with support for full-duplex mode and flow control.

Optional 100BASE-FX Multimode Module

Figure 1-7. Single-Port 100BASE-FX Multimode Module

Using multimode fiber optic cable, the 100BASE-FX port can be connected to a
remote site up to 2 km (1.24 miles) away. The 100BASE-FX module is fixed to
operate at 100 Mbps full duplex, and supports auto-negotiation for flow control. The
module is fitted with an SC connector.

Optional 100BASE-FX Single-mode Module

Figure 1-8. Single-Port 100BASE-FX Single-mode Module

Using fiber optic cable, the 100BASE-FX port can be connected to a remote site up
to 20 km (12.43 miles) away. The 100BASE-FX module is fixed to operate at
100 Mbps full duplex, and supports auto-negotiation for flow control. The module is
fitted with an SC connector.

Optional 1000BASE-X GBIC Module

Figure 1-9. Single Port 1000BASE-X GBIC Module

100BASE-FX Multimode Module

TX

RX

100BASE-FX Singlemode Module

TX

RX

1000BASE-X GBIC Module

Description of Hardware

1-7

This module supports 5 V 1000BASE-SX, 1000BASE-LX and 1000BASE-LH GBIC
transceivers:

1000BASE-SX GBIC transceivers provide one short-wavelength (850 nm) Gigabit
port that can be used for a high-speed backbone or server connection. This port can
be connected to a site up to 220 m (722 ft) away with 62.5/125 micron multimode
fiber cable, or up to 500 m (1641 ft) with 50/125 micron multimode fiber cable.

1000BASE-LX GBIC transceivers provide one long-wavelength (1300 nm) Gigabit
port that can be used for a high-speed backbone or server connection. This port can
be connected to a site up to 5 km (16404 ft) away with single-mode fiber cable.

1000BASE-LH GBIC transceivers provide one long-wavelength (1550 nm) Gigabit
port that can be used for a long-haul connection to a remote location. This port can
be connected to a site up to 70 km (43.5 miles) away with single-mode fiber cable.

Caution: Install only 5 V GBIC transceivers into the module slots.

Optional Stacking Module

Figure 1-10. Stacking Module

The module provides two 1 Gbps ports via USB Type-A connectors. The right port is
a transmit port and the one on the left a receive port. The module allows up to eight
switches to be linked together using stacking cables (ordered separately). The push
button on the module enables one switch in the stack to be selected as the master.

Combo Module

Figure 1-11. Combo Module

This combo module provides a Gigabit RJ-45 port with a shared Small Form Factor
Pluggable (SFP) transceiver slot. 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

Stacking Module

RX TX

1000BASE Combo Module

About the Switch

1-8

disabled.

To connect a device to an SFP port, do the following:

1. Use your cabling requirements to select an appropriate SFP transceiver type.

2. Insert the SFP transceiver (sold separately) into an SFP slot. The slot’s LED

indicator turns on to confirm that it is correctly installed.

The 1000BASE-T RJ-45 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. (See “10BASE-T/100BASE-TX Pin Assignments” on page B-2.)

Power Supply Receptacle

The power receptacle is located on the rear panel of the switch. The standard power
receptacle is for the AC power cord.

Figure 1-12. Power Supply Receptacle

100-240V~
50/60Hz, 2A

Features and Benefits

1-9

Features and Benefits

Connectivity

• 24 dual-speed ports for 10 or 100 Mbps Ethernet connections

• Auto-negotiation enables each RJ-45 port to automatically select the optimum
communication mode (half or full duplex) for the attached device

• Independent RJ-45 ports with support for automatic MDI/MDI-X

• Unshielded (UTP) cable supported on all RJ-45 ports: Category 3, 4 or 5 for
10 Mbps connections and Category 5 for 100 Mbps connections

• IEEE 802.3 Ethernet and 802.3u Fast Ethernet compliance ensures compatibility
with standards-based hubs, network cards and switches from any vendor

• Provides stacking capability via a module with 1 Gbps stacking bandwidth. Up to 8
units can be stacked.

Expandability

• Optional single-port 1000BASE-SX Gigabit module that can run up to 550 meters
using 50/125 micron multimode fiber cable, and operates at 1 Gbps, full duplex,
with auto-negotiation for flow control

• Optional single-port 1000BASE-LX Gigabit module that can run up to 5 km using
9/125 micron single-mode fiber cable, and operates at 1 Gbps, full duplex, with
auto-negotiation for flow control

• Optional single-port 1000BASE-T Gigabit module that can run up to 100 meters
using 100-ohm Category 5, 5e, or 6 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable, and operates at 1 Gbps, full duplex, with auto negotiation
for flow control

• Optional single-port 100BASE-FX module that can run up to 20 km using 9/125
micron single-mode fiber cable and operates at 100 Mbps, full duplex, with
auto-negotiation for flow control

• Optional single-port 100BASE-TX module that can run a connection up to 100
meters away using 100-ohm Category 5 unshielded twisted-pair (UTP) or shielded
twisted-pair (STP) cable, and operates at 10/100 Mbps, full/half duplex, with auto
negotiation for speed, duplex mode, and flow control

• Optional 2-port 1000BASE-T module, with combined Small Form Factor Pluggable
(SFP) slot

• Optional 1000BASE-X GBIC module

Performance

• Transparent bridging

• Aggregate bandwidth up to 8.8 Gbps

• Switching Table with 8K MAC address entries

• Filtering and forwarding at line speed

About the Switch

1-10

• Desktop or rack-mountable

Features and Benefits

1-11

Management

• “At-a-glance” LEDs for easy troubleshooting

• Management agent:

• Supports Telnet, SNMP and Web-based interface

• Manages switch (or entire stack) in-band or out-of-band

• Spanning Tree Protocol

• Private VLAN function providing port-based security and isolation between
ports

• VLAN support with up to 256 groups, port-based or with 802.1Q VLAN
tagging, and GVRP for automatic VLAN learning

• Quality of Service (QoS) supports four levels of priority and Weighted Round
Robin

• Multicast Switching based on IGMP Snooping

• Port trunking supported for 2, 3 or 4-port groups

About the Switch

1-12

2-1

Chapter 2: Network Planning

Introduction to Switching

A network switch allows simultaneous transmission of multiple packets via
non-crossbar 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 maximum distance
between end stations is limited. For Ethernet, there may be up to four hubs between
any pair of stations; for Fast Ethernet, the maximum is two. This is known as the 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 or Fast Ethernet network to
significantly boost bandwidth while using conventional cabling and network cards.

Network Planning

2-2

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 and Fast 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 cascade the switch to an Ethernet
or Fast Ethernet hub or switch.

Figure 2-1. Collapsed Backbone

Servers

200 Mbps
Full Duplex

Workstations

200 Mbps
Full Duplex

Workstations

20 Mbps
Full Duplex

...

...

...

Module2 Module1

Application Examples

2-3

Central Wiring Closet

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

In the figure below, the 10BASE-T/100BASE-TX ports on the switch are providing
100 Mbps connectivity for up to 24 segments. In addition, the switch is also
connecting servers at 100 Mbps.

Figure 2-2. Central Wiring Closet

Server Farm

10/100 Mbps Segments

...

...

Module2 Module1

Network Planning

2-4

Making VLAN Connections

VLANs can be based on port groups, or each data frame can be explicitly tagged to
identify the VLAN group to which it belongs. When using port-based VLANs, ports
can either be assigned to one specific group or to all groups. Port-based VLANs are
suitable for small networks. A single switch can be easily configured to support
several VLAN groups for various organizational entities (such as Finance and
Marketing).

When you expand port-based VLANs across several switches, you need to make a
separate connection for each VLAN group. This approach is, however, inconsistent
with the Spanning Tree Protocol, which can easily segregate ports that belong to the
same VLAN. When VLANs cross separate switches, it is therefore better to use
VLAN tagging. This allows you to assign multiple VLAN groups to the “trunk” ports
(that is, tagged ports) connecting different switches.

Figure 2-3. Making VLAN Connections

Finance

Marketing

VLAN 3

Untagged Ports

VLAN

unaware

switch

Tagged Port

VLAN
aware
switch

Tagged

Ports

Finance

VLAN 3

R&D

VLAN 2

Testing

R&D

Testing

VLAN 1

VLAN 2

VLAN 4

VLAN 1

Module2 Module1

Connectivity Rules

2-5

Connectivity Rules

When adding hubs (repeaters) to your network, please follow the connectivity rules
listed below for Ethernet, Fast Ethernet, or Gigabit Ethernet. 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.

Maximum Fiber Optic Cable Distance for 1000BASE-SX

Fiber Size Fiber Bandwidth Maximum Cable Length

62.5/125 micron 160 MHz/km 2-220 m (7-722 ft)

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

50/125 micron 400 MHz/km 2-500 m (7-1641 ft)

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

Maximum Fiber Optic Cable Distance for 1000BASE-LX

Fiber Size Fiber Bandwidth Maximum Cable Length

9/125 micron N/A 2 m - 5 km (7 - 16404 ft)

Maximum Cable Distance for 1000BASE-T

Type Connector Maximum Cable Length

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

Maximum Cable Distance for 10/100BASE

Type Cable Type Maximum Cable Length

10BASE-T Twisted Pair, Categories 3, 4, 5 100 m (328 ft)

100BASE-TX Category 5 100-ohm UTP or STP 100 m (328 ft)

100BASE-FX
Multimode

50/125 or 62.5/125 micron core multimode fiber
(MMF)

2 km (1.24 miles)

100BASE-FX
Single-Mode

9/125 micron core single-mode fiber (SMF) 20 km (12.43 miles)

Network Planning

2-6

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. When a switch is connected to a hub or any kind of shared media, you may
want to turn off back pressure flow control to prevent jamming packets from
being propagated thoughout the hub.

3. As a general rule the length of fiber optic cable for a single switched link should
not exceed:

• 1000BASE-SX/LX: 550 m (1805 ft) for multimode fiber or 5 km (16404 ft) for

single-mode fiber.

• 100BASE-FX: 2 km (1.24 miles) for multimode fiber or 20 km (2.43 miles) for

single-mode fiber.

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

3-1

Chapter 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,
transmitters, etc.

• Make sure that a separate grounded power outlet that provides 100 to 240 VAC,
50 to 60 Hz, is within 2.44 m (8 feet) of each device and is powered from an
independent circuit breaker. As with any equipment, using a filter or surge
suppressor is recommended.

Equipment Checklist

After unpacking the 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

• 24-Port Fast Ethernet Switch

• Four adhesive foot pads

• Bracket Mounting Kit containing two brackets and four screws for attaching the
brackets to the switch

• Power Cord—either US, Continental Europe or UK

• RS-232 console cable

• This Installation Guide

• Management Guide

Installing the Switch

3-2

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)

Mounting

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

Installing Optional Modules: Before mounting the switch, be sure you install any
optional modules. If you have purchased optional slide-in 1000BASE-T,
1000BASE-SX, 1000BASE-LX, 100BASE-FX, or 1000BASE-X GBIC media
expansion modules, install these modules now, following the instructions “Installing
an Optional Module into the Switch” on page 3-4.

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 C-1.)

• 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.

To rack-mount devices:

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

Mounting Kit.

100BASE-FXSinglemode Module

TX

RX

L
in

k

M

1

M

2

P

W

R

D

ia

g

S

ta

c
k

R

P

U

D

u
p

le

x

Mounting

3-3

Figure 3-1. Attaching the Brackets

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

Figure 3-2. Installing the Switch in a Rack

3. If installing a single switch only, turn to “Connecting to a Power Source” at the

end of this chapter.

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

any order.

Desktop or Shelf Mounting

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

Figure 3-3. Attaching the Adhesive Feet

100BASE-FXSinglemode Module

TX

RX

Link

Duplex

M1

M2

PWR

Diag

Stack

Module 1

RPU

L

in

k

Duplex

M

1

M

2

P

W

R

D

ia

g

S

ta

ck

R

P

U

Module 1

M

odule

2

Installing the Switch

3-4

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” 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 the one below, in any order.

Installing an Optional Module into the Switch

Figure 3-4. Installing an Optional Module

Caution: DO NOT install slide-in modules with the switch powered on. Be sure you

power off the switch before installing any module.

Note: The stacking module must only be installed in slot Module 2.

To install an optional module into the switch, do the following:

1. Disconnect power to the switch.

2. Remove the blank metal plate (or a previously installed module) from the

appropriate slot by removing the two screws with a flat-head screwdriver.

3. With the module still in the anti-static bag, touch the metal frame of the switch to

prevent damage caused by static electricity discharge. Also, it is recommended
to use an ESD wrist strap during installation.

4. Remove the module from the anti-static shielded bag.

100B

ASE-FX

Sing

lem

od

eM

odule

TX

RX

Module 1

Module 2

Link

Duplex

M1

M2

PWR

Diag

Stack

RPU

Installing a GBIC Transceiver

3-5

5. Holding the module level, guide it into the carrier rails on each side and gently

push it all the way into the slot, ensuring that it firmly engages with the
connector.

Installing a GBIC Transceiver

Figure 3-5. Installing a GBIC Transceiver

You can install a GBIC transceiver as described below:

1. Insert the transceiver with the SC connector facing out toward you. Note that

the transceiver is keyed so that it can only be installed in one orientation.

2. Press in on the transceiver’s side tabs, and gently slide it into the GBIC

interface slot until it clicks into place.

Note: GBIC transceivers are hot-swappable. You do not need to power off the switch

before installing or removing a transceiver.

Caution: Install only 5 V GBIC transceivers into the module slots.

1
00

0
B

A
S

E

-X
G

B
IC

M

o
d

u
le

Module1

L
ink

M

1

M

2

P
W

R

D

iag

S
tack

R

P
U

D

uplex

Installing the Switch

3-6

Connecting to the Stack’s Backplane

Plug one end of the stack cable (ordered separately) in the TX (right) port of the top
unit and the other end to the RX (left) port of the next unit. Repeat this step for each
unit in the stack. Form a simple chain starting at the TX port on the top unit and
ending at the RX port on the bottom unit (stacking up to 8 units). Finally, complete
the stack connections by plugging one end of a stack cable into the TX port on the
bottom unit and the other end into the RX port on the top unit.

Figure 3-6. Connecting to backplane

Select the Master unit in the stack by pressing the push button in on only one of the
stacking modules. Only one switch in the stack can operate as the Master, all other
units operate in slave mode. If more than one switch in the stack is selected as
Master, or if no switches are selected, the stack will not function.

Note: The stacking feature requires that all stacking module ports be connected and

the switches powered on. If one stack link is not connected, or if a switch is
powered off, the stack will not function.

StackingModule

TX

RX

StackingModule

TX

RX

StackingModule

TX

RX

Module 2

Link

M

1

M

2

P

W

R

D

iag

S

ta

ck

R

P

U

D

up

lex

Module 1

Link

M

1

M

2

P

W

R

D

iag

S

ta

ck

R

P

U

D

up

lex

Module 2

Link

M

1

M

2

P

W

R

D

iag

S

ta

ck

R

P

U

D

up

lex

Module 2

L

ink

M

1

M

2

P

W

R

D

iag

S

tack

R

P

U

D

uple

x

Module 2

Link

M

1

M

2

P

W

R

D

iag

S

tack

R

P

U

D

uplex

Module 1

Module 1

Connecting to a Power Source

3-7

Connecting to a Power Source

To connect a device to a power source:

1. Insert the power cable plug directly into the receptacle located at the back of
the device.

Figure 3-7. Power Receptacle

2. Plug the other end of the cable into a grounded, 3-pin socket.

Note: 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 receptacle type in your
country.

3. Check the front-panel LEDs as the device is powered on to be sure the Power
LED is lit. If not, check that the power cable is correctly plugged in.

100-240V~
50/60Hz, 2A

Installing the Switch

3-8

4-1

Chapter 4: Making Network Connections

Connecting Network Devices

The switch may be connected to 10 or 100 Mbps network cards in PCs and servers,
as well as to Ethernet and Fast Ethernet hubs and switches. It may also be
connected to remote devices using the optional fiber optic modules.

Twisted-Pair Devices

Each device requires a shielded or unshielded twisted-pair (STP or UTP) cable with
RJ-45 connectors at both ends. For 1000BASE-T Category 5, 5e, or 6 cable is
required, for 100BASE-TX connections, Category 5 cable is required; for 10BASE-T,
Category 3, 4 or 5 cable can be used.

Cabling Guidelines

A twisted-pair connection between two ports must have a crossover of the transmit
and receive wires to be able to function. This crossover can be implemented in
either of the ports, or in the cable connecting them.

Network card ports in PCs and servers do not contain an internal wiring crossover,
these are known as straight-through (MDI) ports. Therefore, most switch and hub
ports implement a built-in crossover — known as fixed crossover (MDI-X) ports —
so that they can be connected to PCs and servers using standard straight-through
cable. Some switches and hubs also have an MDI port, so that they can connect to
another switch’s/hub’s MDI-X port using straight-through cable. To connect between
two switches/hubs that only have fixed MDI-X ports, the wiring crossover must be
implemented in the cable — known as a crossover cable.

The RJ-45 ports on the switch base unit support automatic MDI/MDI-X operation,
which means that they automatically detect the wiring in the link and configure as
MDI or MDI-X accordingly. So for these ports, you can use standard straight-through
twisted-pair cables to connect to any other network device (PCs, servers, switches,
hubs, or routers). However, note that auto-negotiation must be enabled on these
ports for automatic wiring configuration to function properly.

Making Network Connections

4-2

Connecting to PCs, Servers, Hubs and Switches

Caution: 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.

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

Figure 4-1. Making Twisted-Pair Connections

2. If the device is a PC 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 “Wiring Closet Connections” on the next page.) Otherwise, attach
the other end to an available port on the switch.

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

Note: When connected to a shared collision domain (such as a hub with multiple

workstations), switch ports must be set to half-duplex mode.

4. As each connection is made, the green Link LED (on the switch) corresponding
to each port will light to indicate that the connection is valid.

Wiring Closet Connections

Today, the punch-down block is an integral part of many of the newer equipment
racks. It is actually 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

Twisted-Pair Devices

4-3

modular wall outlet.

3. Label the cables to simplify future troubleshooting.

Figure 4-2. Wiring Closet Connections

Equipment Rack
(side view)

24-Port Fast Ethernet Switch

Patch Panel

Punch-Down Block

Wall

Module2 Module1

Making Network Connections

4-4

Fiber Optic Devices

An optional slide-in 1000BASE-SX, 1000BASE-LX or 100BASE-FX module, or
1000BASE-X transceiver may be used for backbone and long distance connections.
A 1000BASE-SX, 100BASE-LX, or 1000BASE-X transceiver may also be for
connecting to a high-speed server.

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

Warning: 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.

1. Remove and keep the SC 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 SC port on the switch and the other end to
the SC port on the other device. Since SC connectors are keyed, the cable can
be attached in only one orientation.

Figure 4-3. Making SC Port Connections

4. As a connection is made, check the Activity LED on the switch’s front panel for
the corresponding module to be sure that the connection is valid.

SC fiber connector

1

00

B

A

S

E

-F

X

S

ing

le

m

o

d

e

M

o

d

u

le

TX

RX

Module 2

Module 1

Link

M1

M2

PWR

Diag

Stack

RPU

Duplex

A-1

Appendix A: Troubleshooting

Diagnosing Switch Indicators

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, and verify that the fans on
the unit are unobstructed and running prior to shutdown. If you still cannot isolate the
problem, then 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. 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

Troubleshooting Chart

Symptom Action

PWR LED is Off • Internal power supply is disconnected.

• Check connections between the switch, the power cord, the wall outlet.

PWR LED is Amber • Internal power supply has failed.

• Contact your local 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.

Troubleshooting

A-2

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.

Note: 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.

B-1

Appendix B: Cables

Specifications

Cable Types and Specifications

Cable Type Max. Length Connector

10BASE-T Cat. 3, 4, 5 100-ohm UTP 100 m (328 ft) RJ-45

100BASE-TX Cat. 5 100-ohm UTP 100 m (328 ft) RJ-45

100BASE-FX 50/125 or 62.5/125 micron core

multimode fiber (MMF)

2 km (1.24 miles) SC

100BASE-FX 9/125 9 micron core single-mode

fiber (SMF)

20 km (12.43 miles) SC

1000BASE-SX 50/125 or 62.5/125 micron core

MMF

See the following table SC

1000BASE-LX 9/125 micron SMF 5 km (3.12 miles) SC

1000BASE-T Cat. 5, 5e, or 6 100-ohm UTP 100 m (328 ft) RJ-45

1000BASE-SX Fiber Specifications

Fiber Diameter Fiber Bandwidth Maximum Cable Length

62.5/125 micron MMF 160 MHz/km 2-220 m (7-722 ft)

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

50/125 micron MMF 400 MHz/km 2-500 m (7-1641 ft)

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

Cables

B-2

Twisted-Pair Cable and Pin Assignments

Caution: 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.

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

Caution: Each wire pair must be attached to the RJ-45 connectors in a specific

orientation. (See “Cabling Guidelines” on page 4-1 for an explanation.)

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.

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, 4 or 5 cable for 10 Mbps connections or 100-ohm
Category 5 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,
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.

Pin MDI-X Signal Name MDI Signal Name

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

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

3

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

6

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

4,5,7,8

Not used Not used

Note: The “+” and “-” signs represent the polarity of the wires that make
up each wire pair.

1000BASE-T Pin Assignments

B-3

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.)

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.)

1000BASE-T Pin Assignments

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).

Straight-Through RJ-45 Pin Assignments

End 1 End 2

1 (RD+) 1 (TD+)

2 (RD-) 2 (TD-)

3 (TD+) 3 (RD+)

6 (TD-) 6 (RD-)

Crossover RJ-45 Pin Assignments

End 1 End 2

1 (TD+) 3 (RD+)

2 (TD-) 6 (RD-)

3 (RD+) 1 (TD+)

6 (RD-) 2 (TD-)

Pin MDI Signal Name MDI-X Signal Name

1 Transmit Data plus (TD1+) Transmit Data plus (TD2 +)

2 Receive Data minus (RD1-) Receive Data minus (RD2-)

3 Transmit Data plus (TD2+) Transmit Data plus (TD1+)

4 Transmit Data plus (TD3+) Transmit Data plus (TD4+)

Cables

B-4

5 Receive Data minus (RD3-) Receive Data minus (RD4-)

6 Receive Data minus (RD2-) Receive Data minus (RD1-)

7 Transmit Data plus (TD4+) Receive Data minus (RD3+)

8 Receive Data minus (RD4-) Receive Data minus (RD3-)

Pin MDI Signal Name MDI-X Signal Name

1000BASE-T Cable Requirements

B-5

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 6 cable should be used. The Category 5e
and 6 specification includes 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 802.3ab standards.

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.

Adjusting Existing Category 5 Cabling

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 to correct
the problem:

1. Replace any Category 5 patch cables with high-performance Category 5e or 6
cables.

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

3. Reconnect some of the connectors in the link.

Console Port Pin Assignments

The DB-9 serial port on the switch’s front panel is used to connect to the switch for
out-of-band console configuration. The on-board menu-driven configuration program
can be accessed from a terminal or a PC running a terminal emulation program. The
pin assignments used to connect to the serial port are provided in the following

Cables

B-6

tables.

DB-9 Port Pin Assignments

Console Port to 9-Pin DTE Port on PC

Console to 25-Pin DTE Port on PC

EIA

Circuit

CCITT
Signal

Description Switch’s

DB9 DTE

Pin #

PC DB9

DTE

Pin #

PC DB25

DTE

Pin #

BB 104 RxD (Received Data) 2 2 3

BA 103 TxD (Transmitted Data) 3 3 2

AB 102 SG (Signal Ground) 5 5 7

No other pins are used.

Switch’s 9-Pin

Serial Port

Null Modem PC’s 9-Pin

DTE Port

2 RXD <--------- TXD ------------ 3 TXD

3 TXD ----------- RXD ----------> 2 RXD

5 SGND ----------- SGND ---------- 5 SGND

No other pins are used.

Switch’s 9-Pin

Serial Port

Null Modem PC’s 25-Pin

DTE Port

2 RXD <--------- TXD ------------ 2 TXD

3 TXD ----------- RXD ----------> 3 RXD

5 SGND ----------- SGND ---------- 7 SGND

No other pins are used.

C-1

Appendix C: Specifications

Physical Characteristics

Base Unit

Ports

24 10BASE-T/100BASE-TX, with auto-negotiation

Media Slots

2 slots for optional 100BASE-FX, 1000BASE-T, 1000BASE-SX,1000BASE-LX,
2-port 1000BASE-T and 1000BASE-X with SFP slots, and 1000BASE-X GBIC
modules

Network Interface

10BASE-T: RJ-45 (100-ohm, UTP cable; Categories 3, 4, 5)
100BASE-TX:RJ-45 (100-ohm, UTP cable; Category 5)

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

Communication Speed

10 and 100 Mbps

Communication Mode

Full and half duplex

Buffer Architecture

32 Mbyte per system

Aggregate Bandwidth

8.8 Gbps

Switching Database

8K MAC address entries

LEDs

System: PWR, Diag, Stack
Ports:

Link/Activity

Weight

4.06 kg (6 lb 13 oz)

Size

44 x 32.4 x 4.3 cm (17.32 x 12.8 x 1.69 in.)

Specifications

C-2

Temperature

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

Humidity

Operating: 10% to 90%

Power Supply

Internal, auto-ranging transformer: 100 to 240 VAC, 47 to 63 Hz

Power Consumption

60 Watts maximum

Heat Dissipation

205 BTU/hr maximum

Maximum Current

3.0 A @ 110 V

2.0 A @ 240 V

Switch Features

Spanning Tree Protocol

Forwarding Mode

Store-and-forward

Throughput

Wire speed

Flow Control

Full Duplex: IEEE 802.3x
Half Duplex: Back pressure

Broadcast Storm Suppression

Traffic throttled above a critical threshold

VLAN Support

Up to 256 groups; port-based or with 802.1Q VLAN tagging,
GVRP for automatic VLAN learning, private VLANs

Multicast Switching

IGMP Snooping

Quality of Service

Supports four levels of priority and Weighted Round Robin Queueing

Switch Features

C-3

(which can be configured by VLAN tag or port),
Layer 3/4 priority mapping: IP Precedence, IP DSCP

Specifications

C-4

Management Features

In-Band Management

Telnet, or SNMP manager

Out-of-Band Management

RS-232 DB-9 console port

Software Loading

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

MIB Support

MIB II (RFC1213), Bridge MIB (RFC 1493, without Static Table)

Standards

IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet
IEEE 802.1p priority tags
IEEE 802.3ac VLAN tagging
IEEE 802.1D (Bridging)
IEEE 802.1w Rapid Spanning Tree Protocol
IEEE 802.3ad Link Aggregation
IEEE 802.1Q VLAN Bridge Management
IEEE 802.1x RADIUS user authentication
IEEE 802.3x full-duplex flow control
ISO/IEC 8802-3
UDP (RFC 768), IP (RFC 791), TCP (RFC793), TFTP (RFC 783), TELNET
(RFC 783), SNMP (RFC 1157), MIB II (RFC 1213), Traps (RFC 1215), Bridge MIB
(RFC 1493), RMON (RFC 1757), HTML (RFC 1866), HTTP (RFC 2068), RADIUS
(RFC 2618)

Compliances

C-5

Compliances

CE Mark

Emissions

FCC Class A
Industry Canada Class A
EN55022 (CISPR 22) Class A
EN 61000-3-2/3
VCCI Class A
C-Tick - AS/NZS 3548 (1995) Class A

Immunity

EN 61000-4-2/3/4/5/6/8/11

Safety

CSA/NRTL (CSA 22.2.950 & UL 1950)
TUV/GS (EN60950)

Slide-in Modules

100BASE-FX Extender Modules

Ports

1 100BASE-FX, SC connectors

Communication Speed

100 Mbps

Communication Mode

Full duplex

Network Interface

MS-3726-SFC: 9/125 micron single-mode fiber cable
MS-3726-MFC: 50/125 or 62.5/125 micron multimode fiber cable

Standards

IEEE 802.3u Fast Ethernet
ISO/IEC 8802-3

1000BASE-T Extender Module

Ports

1 10000BASE-T, RJ-45 connector

Communication Speed

10/100/1000 Mbps

Specifications

C-6

Communication Mode

Full duplex only at 1000 Mbps
Full and half duplex at 10/100 Mbps

Network Interface

RJ-45 (100-ohm, UTP cable; Category 5, 5e, or 6)

Standards

IEEE 802.3ab Gigabit Ethernet
IEEE 802.3u Fast Ethernet
IEEE 802.3 Ethernet

1000BASE-SX Extender Module

Ports

1 1000BASE-SX SC-type port

Communication Speed

1000 Mbps

Communication Mode

Full duplex

Network Interface

SC connector: 50/125 or 62.5/125 micron multimode fiber cable

Standards

IEEE 802.3z Gigabit Ethernet

1000BASE-LX Extender Module

Ports

1 1000BASE-LX SC-type port

Communication Speed

1000 Mbps

Communication Mode

Full duplex

Network Interface

SC connector, 9/125 micron single-mode fiber

Standards

IEEE 802.3z Gigabit Ethernet

Slide-in Modules

C-7

1000BASE-X GBIC Module

Ports

1 slot for GBIC transceivers

Communication Speed

1000 Mbps

Communication Mode

Full Duplex

Standards

IEEE 802.3z Gigabit Ethernet

Combo Module

Ports

1 Gigabit RJ-45 port, 1 Small Form Factor Pluggable (SFP) transceiver slot

Communication Speed

1000 Mbps

Communication Mode

Full Duplex

Network Interface

SC connector, 9/125 micron single-mode fiber

Standards

LC, MT-RJ, or SG conector, 50/125 or 62.5/125 micron multimode fiber cable
9/125 micron single-mode fiber cable

Stacking Module

Ports

2 USB Type-A ports

Specifications

C-8

Glossary-1

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 802.3u specification for 100 Mbps Fast Ethernet over two strands of 50/125 or

62.5/125 micron core fiber cable.

100BASE-TX

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

1000BASE-LX

IEEE 802.3z specification for Gigabit Ethernet over one strand of 9/125 micron core
fiber cable.

1000BASE-LH

Gigabit Ethernet over two strands of 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 two pairs of Category 5, 5e, or
6 100-ohm UTP cable.

Auto-Negotiation

Signalling method allowing each node to select its optimum operational mode (e.g.,
10, 100, or 1000 Mbps and half or full duplex) 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.

Glossary

Glossary-2

Collision

A condition in which packets transmitted over the cable interfere with each other.
Their interference makes both signals unintelligible.

Collision Domain

Single CSMA/CD LAN segment.

CSMA/CD

Carrier Sense Multiple Access/Collision Detect is the communication method
employed by Ethernet and Fast Ethernet.

End Station

A workstation, server, or other device that does not act as a network interconnection.

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.

Fast Ethernet Switch

Device that provides a full 100 Mbps bandwidth (or either 10 or 100 Mbps bandwidth
with Auto-Negotiation) to each port (LAN segment).

Full Duplex

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

Gigabit Ethernet

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

IEEE 802.3

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

Glossary

Glossary-3

IEEE 802.3ab

Defines CSMA/CD access method and physical layer specifications for
1000BASE-T Gigabit Ethernet.

IEEE 802.3u

Defines CSMA/CD access method and physical layer specifications for
100BASE-TX Fast Ethernet.

IEEE 802.3x

Defines Ethernet frame start/stop requests and timers used for flow control on
full-duplex links.

IEEE 802.3z

Defines CSMA/CD access method and physical layer specifications for 1000BASE
Gigabit Ethernet over fiber cable.

LAN Segment

Separate LAN or collision domain.

LED

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

Link Segment

Length of twisted-pair or fiber cable joining a pair of repeaters or a repeater and a
PC.

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.

Network Diameter

Wire distance between two end stations in the same collision domain.

Glossary

Glossary-4

RJ-45 Connector

A connector for twisted-pair wiring.

Switched Ports

Ports that are on separate collision domains or LAN segments.

Transmission Control Protocol/Internet Protocol (TCP/IP)

Protocol suite that includes TCP as the primary transport protocol, and IP as the
network layer protocol.

UTP

Unshielded twisted-pair cable.

Index-1

Numerics

1000 Mbps connectivity rules 2-5
1000BASE-LX fiber cable lengths 2-5
1000BASE-SX fiber cable lengths 2-5
1000BASE-T

cable lengths 2-5
modules 1-5

100BASE-FX

connections 4-4
fiber cable lengths 2-5
modules 1-6

100BASE-TX

cable lengths 2-5

ports 1-2
10BASE B-2
10BASE-T B-2

cable lengths 2-5

ports 1-2
10BASE-T/100BASE-TX Pin

Assignments B-2

A

address table size C-1
adhesive feet, attaching 3-3
air flow requirements 3-1
application example 2-2

B

brackets, attaching 3-2
buffer size C-1

C

cable lengths 2-5
cleaning fiber terminators 4-4
compliances

EMC C-4

safety C-4
connectivity rules 2-5
console port pin assignments B-5
contents of package 3-1
cooling problems A-1
cord sets, international 3-7
crossover port 4-1

D

desktop mounting 3-3
device connections 4-1

E

electrical interference, avoiding 3-1
equipment checklist 3-1

F

features C-3

management 1-10

switch 1-9
fiber cables 4-4
full-duplex connectivity 2-1

G

Gigabit Ethernet cable lengths 2-5
grounding for racks 3-2

I

indicators, LED 1-3
installation

connecting devices to the switch 4-2

desktop or shelf mounting 3-3

installing a GBIC transceiver 3-5

installing optional modules 3-2

port connections 4-1

, 4-4

power requirements 3-1

problems A-1

rack mounting 3-2

site requirements 3-1

wiring closet connections 4-2

L

laser safety 4-4
LED indicators

Diag 1-4

Duplex 1-4

Link 1-4

Power 1-4

problems A-1

Stack 1-4
location requirements 3-1

Index

Index

Index-2

M

management

agent 1-2
features 1-10

, C-3

out-of-band 1-2
SNMP 1-2
Web-based 1-2

MIB support C-2

, C-3

modules

1000BASE-LX C-5
1000BASE-T 1-5

, C-4

1000BASE-X GBIC 1-6
100BASE-FX 1-6

, C-4

slide-in C-4

mounting the switch

in a rack 3-2
on a desktop or shelf 3-3

multimode fiber optic cables 4-4

N

network

connections 4-1

, 4-4

examples 2-2

O

optional modules

installation 3-2
specifications C-4

out-of-band management 1-2

P

package contents 3-1
pin assignments B-2

console port B-5
port saturation 1-2
ports, connecting to 4-1

, 4-4

power, connecting to 3-7
problems, troubleshooting A-1

Q

QoS 1-2

R

rack mounting 3-2
rear panel receptacles 1-8
RJ-45 ports

connections 4-1
description 1-2
pinouts B-3

rubber foot pads, attaching 3-3

S

SC port connections 4-4
screws for rack mounting 3-2
single-mode fiber optic cables 4-4
site selelction 3-1
SNMP agent 1-2
specifications

1000BASE-X GBIC module C-5

, C-6

compliances C-4
environmental C-1
physical C-1
power C-2

standards

compliance C-4

IEEE C-3
status LEDs 1-3
surge suppressor, using 3-1
switch architecture 1-1
switching, introduction to 2-1

T

Telnet A-2
temperature within a rack 3-2
troubleshooting

in-band access A-1

power and cooling problems A-1

switch indicators A-1
twisted-pair connections 4-1

V

VLANs 1-2

W

Web-based management 1-2