Allied Telesis AT-GS950/8 User manual

613-000380 Rev. C
Gigabit Ethernet
WebSmart Switch
AT-GS950/8
Installation Guide

Copyright ©2007 Allied Telesis, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc.
Allied Telesis is a trademark of Allied Telesis, Inc. Microsoft and Internet Explorer are registered trademarks of Microsoft
Corporation. Netscape Navigator is a registered trademark of Netscape Communications Corporation. All other product names,
company names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective
owners.
Allied Telesis, Inc. reserves the right to make changes in specifications and other information contained in this document without
prior written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesis, Inc. be
liable for any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost profits, arising
out of or related to this manual or the information contained herein, even if Allied Telesis, Inc. has been advised of, known, or
should have known, the possibility of such damages.

3
Electrical Safety and Emissions Standards
This product meets the following standards.
RFI Emissions FCC Class A, EN55022 Class A, EN61000-3-2, EN61000-3-3, VCCI
Class A, C-TICK, CE
Immunity EN55024
Electrical Safety EN60950 (TUV), UL 60950 (CULUS)
U.S. Federal Communications Commission
Radiated Energy
Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15
of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with this instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case
the user will be required to correct the interference at his own expense.
Note: Modifications or changes not expressly approved of by the manufacturer or the FCC, can void your right to operate
this equipment.
Industry Canada
This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
European Union Restriction of the Use of Certain Hazardous Substances
(RoHS) in Electrical and Electronic Equipment
This Allied Telesis RoHS-compliant product conforms to the European Union Restriction of the Use of Certain Hazardous
Substances (RoHS) in Electrical and Electronic Equipment. Allied Telesis ensures RoHS conformance by requiring
supplier Declarations of Conformity, monitoring incoming materials, and maintaining manufacturing process controls.
Warning: In a domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.
Laser Safety EN60825

4
Translated Safety Statements
Important: The indicates that a translation of the safety statement is available in a PDF
document titled “Translated Safety Statements” posted on the Allied Telesis website at
www.alliedtelesis.com and on the documentation CD shipped with this product.

5
Contents
Preface ................................................................................................................................................................................11
Safety Symbols Used in this Document................................................................................................................................12
Where to Find Web-based Guides .......................................................................................................................................13
Contacting Allied Telesis ......................................................................................................................................................14
Online Support ..............................................................................................................................................................14
Email and Telephone Support .......................................................................................................................................14
Warranty........................................................................................................................................................................14
Returning Products........................................................................................................................................................14
For Sales or Corporate Information...............................................................................................................................14
Chapter 1: Overview ..........................................................................................................................................................15
Features ...............................................................................................................................................................................16
Front and Back Panels .........................................................................................................................................................17
Ports .....................................................................................................................................................................................18
Twisted Pair Ports .........................................................................................................................................................18
SFP Ports ......................................................................................................................................................................18
LEDs.....................................................................................................................................................................................19
Power Supply .......................................................................................................................................................................21
Ethernet Switching Basics ....................................................................................................................................................22
MAC Address Table ......................................................................................................................................................22
Duplex Mode .................................................................................................................................................................23
Store and Forward.........................................................................................................................................................23
Back Pressure and Flow Control...................................................................................................................................24
Network Topologies..............................................................................................................................................................25
Power Workgroup Topology ..........................................................................................................................................25
Collapsed Backbone .....................................................................................................................................................25
Chapter 2: Installation .......................................................................................................................................................27
Reviewing Safety Precautions..............................................................................................................................................28
Selecting a Site for the Switch..............................................................................................................................................30
Cabling .................................................................................................................................................................................31
Unpacking the Switch ...........................................................................................................................................................32
Installing the Switch on a Desktop........................................................................................................................................33
Mounting the Switch on a Wall .............................................................................................................................................34
Installing the Switch in a Rack ..............................................................................................................................................36
Installing an Optional SFP Transceiver ................................................................................................................................38
Cabling and Powering On the Switch ...................................................................................................................................40
Connecting the Twisted Pair Cables .............................................................................................................................40
Connecting the Fiber Optic Cables ...............................................................................................................................40
Powering On the Switch ................................................................................................................................................41
Starting a Remote Management Session.............................................................................................................................43
Resetting the Switch.............................................................................................................................................................45
Chapter 3: Troubleshooting ..............................................................................................................................................47
Checking the LEDs...............................................................................................................................................................48
Checking the POWER LED...........................................................................................................................................48
Checking the L/A LED ...................................................................................................................................................48
Appendix A: Technical Specifications .............................................................................................................................49
Physical Specifications .........................................................................................................................................................49
Environmental Specifications................................................................................................................................................49

Contents
6
Power Specifications.............................................................................................................................................................49
Safety and Electromagnetic Emissions Certifications...........................................................................................................49
Connectors and Port Pinouts ................................................................................................................................................50

7
Figure 1. Front and Back Panels .........................................................................................................................................17
Figure 2. System and Port LEDs .........................................................................................................................................19
Figure 3. SFP LEDs.............................................................................................................................................................20
Figure 4. Power Workgroup Topology.................................................................................................................................25
Figure 5. Collapsed Backbone - Hub Topology...................................................................................................................26
Figure 6. Attaching the Rubber Feet ...................................................................................................................................33
Figure 7. Installing the Plastic Anchors and Screws............................................................................................................34
Figure 8. Positioning the Switch (Switch Faces Down) .......................................................................................................35
Figure 9. Attaching the Rack-Mount Bracket (Switch is Flush with Rack)...........................................................................36
Figure 10. Attaching the Rack-Mount Bracket (Switch Extends From Rack) ......................................................................36
Figure 11. Mounting the Switch on a Rack (Switch is Flush with Rack) ..............................................................................37
Figure 12. Mounting the Switch on a Rack (Switch Extends From Rack) ...........................................................................37
Figure 13. Removing the Dust Plugs...................................................................................................................................38
Figure 14. Inserting the SFP Transceiver............................................................................................................................39
Figure 15. Connecting the Twisted Pair Data Cables..........................................................................................................40
Figure 16. Removing the Dust Plug from the SFP Transceiver...........................................................................................41
Figure 17. Connecting the Fiber Optic Cable ......................................................................................................................41
Figure 18. Plugging in the AC Power Cord..........................................................................................................................41
Figure 19. Entering a Switch’s IP Address in the URL Field................................................................................................43
Figure 20. AT-S82 Software Login Page.............................................................................................................................44
Figure 21. AT-S82 Home Page ...........................................................................................................................................44
Figure 22. Resetting the Switch...........................................................................................................................................45
Figure 23. RJ-45 Connector and Port Pin Layout................................................................................................................50
Figures

Figures
8

9
Table 1. Safety Symbols .....................................................................................................................................................12
Table 2. System LED ..........................................................................................................................................................19
Table 3. 10/100/1000Base-T Port LEDs .............................................................................................................................19
Table 4. SFP Port LEDs .....................................................................................................................................................20
Table 5. Twisted Pair Cabling and Distances .....................................................................................................................31
Table 6. MDI Pin Signals (10Base-T or 100Base-TX) ........................................................................................................50
Table 7. MDI-X Pin Signals (10Base-T or 100Base-TX) ....................................................................................................50
Table 8. RJ-45 1000Base-T Connector Pinouts .................................................................................................................51
Tables

Tables
10

11
Preface
This guide contains instructions on how to install the AT-GS950/8 Gigabit
Ethernet WebSmart Switch. This preface contains the following sections:
“Safety Symbols Used in this Document” on page 12
“Where to Find Web-based Guides” on page 13
“Contacting Allied Telesis” on page 14

Preface
12
Safety Symbols Used in this Document
This document uses the safety symbols defined in Table 1.
Table 1. Safety Symbols
Symbol Meaning Description
Caution Performing or omitting a specific action may
result in equipment damage or loss of data.
Warning Performing or omitting a specific action may
result in electrical shock.

AT-GS950/8 Gigabit Ethernet WebSmart Switch Installation Guide
13
Where to Find Web-based Guides
The installation and user guides for all Allied Telesis products are available
in portable document format (PDF) on our web site at
www.alliedtelesis.com. You can view the documents online or download
them onto a local workstation or server.

Preface
14
Contacting Allied Telesis
This section provides Allied Telesis contact information for technical
support as well as sales or corporate information.
Online Support You can request technical support online by accessing the Allied Telesis
Knowledge Base from the following web site:
www.alliedtelesis.com/support. You can use the Knowledge Base to
submit questions to our technical support staff and review answers to
previously asked questions.
Email and
Telephone
Support
For Technical Support via email or telephone, refer to the Allied Telesis
web site: www.alliedtelesis.com. Select your country from the list
displayed on the website. Then select the appropriate menu tab.
Warranty For warranty information, refer to the Allied Telesis web site:
www.alliedtelesis.com/warranty.
Returning
Products
Products for return or repair must first be assigned a Return Materials
Authorization (RMA) number. A product sent to Allied Telesis without a
RMA number will be returned to the sender at the sender’s expense.
To obtain an RMA number, contact the Allied Telesis Technical Support
group at our web site: www.alliedtelesis.com/support/rma. Select your
country from the list displayed on the website. Then select the appropriate
menu tab.
For Sales or
Corporate
Information
You can contact Allied Telesis for sales or corporate information at our
web site: www.alliedtelesis.com. Select your country from the list
displayed on the website. Then select the appropriate menu tab.

15
Chapter 1
Overview
The AT-GS950/8 Gigabit Ethernet WebSmart Switch is a Layer 2 Gigabit
Ethernet switch that is designed to simplify the task of creating or
expanding an Ethernet, Fast Ethernet, or Gigabit Ethernet network.
This chapter contains the follows sections:
“Features” on page 16
“Front and Back Panels” on page 17
“Ports” on page 18
“LEDs” on page 19
“Power Supply” on page 21
“Ethernet Switching Basics” on page 22
“Network Topologies” on page 25

Chapter 1: Overview
16
Features
The AT-GS950/8 Gigabit Ethernet WebSmart Switch includes the
following features:
Eight Auto-Negotiating 10/100/1000Base-T twisted pair ports with
RJ-45 connectors
Two small form-factor pluggable (SFP) ports
LEDs for unit and port status
Auto MDI/MDI-X on the twisted pair ports
IEEE 802.3, IEEE 802.3u compliant, IEEE 802.3z compliant, IEEE
802.3ab compliant
IEEE 802.3x flow control in full-duplex operation (back pressure
supported in half-duplex operation)
Store and forward switching mode
MAC address table capacity of up to 4K addresses with automatic
aging
Web-based configuration using the AT-S82 Management Software

AT-GS950/8 Gigabit Ethernet WebSmart Switch Installation Guide
17
Front and Back Panels
Figure 1 shows the front and back panels of the AT-GS950/8 switch.
Figure 1. Front and Back Panels
912
10/100/1000Base-T
Twisted Pair Ports
SFP Ports
913
100-240VAC
DEFAULT WEB MANAGEMENT PARAMETERS
IP Address: 192.168.1.1
Subnet Mask: 255.255.255.0
Port LEDs
System (Power) LED
Recessed Reset Button
SFP Port LEDs
AC Power Connector

Chapter 1: Overview
18
Ports
The AT-GS950/8 switch features eight twisted pair ports and two SFP
ports. See the following sections for descriptions of the ports.
Twisted Pair
Ports
The twisted pair ports feature 8-pin RJ-45 copper connectors. (For the port
pinouts, refer to “Connectors and Port Pinouts” on page 50.)
The ports are 10Base-T, 100Base-TX, and 1000Base-T compliant and are
capable of 10 megabits per second (Mbps), 100 Mbps, and 1000 Mbps
speeds.
In addition, the twisted pair ports are IEEE 802.3u Auto-Negotiation
compliant. With Auto-Negotiation, the switch automatically matches the
highest possible common speed between each switch port and each end
node. For example, if an end node is capable of only 10 Mbps, the switch
sets the port connected to the end node to 10 Mbps.
Each twisted pair port can operate in either half- or full-duplex mode. The
twisted pair ports are IEEE 802.3u-compliant and Auto-Negotiate the
duplex mode setting.
Note
For the switch to set the duplex mode for each port correctly, the
end nodes that you connect to the switch ports must also use Auto-
Negotiation. Otherwise, a duplex mode mismatch can occur,
affecting network performance. For further information, refer to
“Duplex Mode” on page 23.
Each twisted pair port has a maximum operating distance of 100 m
(328 feet).
For 10 Mbps operation, Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling is required. For 100 or 1000 Mbps
operation, Category 5 and Enhanced Category 5 (5E) 100 ohm shielded
or unshielded twisted pair cabling is required.
The twisted pair ports are auto-MDI. Consequently, they automatically
configure themselves as either MDI or MDI-X. This feature allows you to
use either straight-through or crossover twisted pair cables to connect
devices to the ports.
SFP Ports The two SFP ports can operate in place of their twisted pair port
equivalents to provide fiber optic connectivity. When an SFP is inserted in
the SFP ports (7 or 8) and a fiber optic cable is connected to ports 7/7R or
8/8R, the corresponding twisted pair port is disabled.

AT-GS950/8 Gigabit Ethernet WebSmart Switch Installation Guide
19
LEDs
The LEDs on the front panel display system and port status information.
The system and port LEDs are show in Figure 2 and described in Table 2
and Table 3.
Figure 2. System and Port LEDs
914
System (Power) LED Port LEDs
Table 2. System LED
LED State Description
POWER Off The switch is not receiving power.
On The switch is receiving power.
Table 3. 10/100/1000Base-T Port LEDs
LED State Description
L/A
(LINK/ACT)
Off The port has not established a link with an
end node.
Blinking
Green
The port is transmitting or receiving data.
Green A valid link has been established on the
port.
SPD
(SPEED)
On The port is operating at 1000 Mbps.
Off The port is operating at 10/100 Mbps or no
link is established.
DPX Off Indicates half-duplex mode.
On Indicates full-duplex or no connection.

Chapter 1: Overview
20
The SFP LEDs are shown in Figure 3 and described in Table 4.
Figure 3. SFP LEDs.
930
Table 4. SFP Port LEDs
LED State Description
In Use (port 7) Off The port has not established a link
with an end node.
Blinking
Green
The port is transmitting or receiving
data.
Green A valid link has been established on
the port.
In Use (port 8) Off The port has not established a link
with an end node.
Blinking
Green
The port is transmitting or receiving
data.
Green A valid link has been established on
the port.