Allied Telesis AT-9424T/SP Series Installation guide

Allied Telesis
Brand
Allied Telesis
Model
AT-9424T/SP Series
Category
Network switches
Type
Installation guide
613-000357 Rev. B
AT-9400 Series
Layer 2+ Gigabit
Ethernet Switches
AT-9408LC/SP
AT-9424T/GB
AT-9424T/SP
AT-9424Ts
AT-9424Ts/XP
AT-9448Ts
AT-9448T/SP
AT-9448Ts/XP
◆
Installation Guide
Copyright © 2006 Allied Telesyn, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesyn, 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 Telesyn, 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 Telesyn, 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 Telesyn, 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
EMC (Immunity) EN55024
Electrical Safety EN60950 (TUV), UL 60950 (
C
UL
US
)
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.
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: Appendix B contains translated safety statements for installing this equipment. When
you see the , go to Appendix B for the translated safety statement in your language.
Wichtig: Anhang B enthält übersetzte Sicherheitshinweise für die Installation dieses Geräts. Wenn
Sie sehen, schlagen Sie in Anhang B den übersetzten Sicherheitshinweis in Ihrer Sprache nach.
Importante: El Apéndice B contiene mensajes de seguridad traducidos para la instalación de este
equipo. Cuando vea el símbolo , vaya al Apéndice B para ver el mensaje de seguridad traducido
a su idioma.
Important : L'annexe B contient les instructions de sécurité relatives à l'installation de cet
équipement. Lorsque vous voyez le symbole , reportez-vous à l'annexe B pour consulter la
traduction de ces instructions dans votre langue.
Importante: l’Appendice B contiene avvisi di sicurezza tradotti per l’installazione di questa
apparecchiatura. Il simbolo , indica di consultare l’Appendice B per l’avviso di sicurezza nella
propria lingua.
Важно: Приложение B содержит переведенную инструкцию по безопасности при установке
данного устройства. Если Вы встретите , перейдите к Приложению B для получения
переведенной инструкции по безопасности.
5
Table of Contents
Preface ..................................................................................................................................................................................................................... 7
Safety Symbols Used in this Document .............................................................................................................8
Where to Find Web-based Guides .....................................................................................................................9
Contacting Allied Telesyn ................................................................................................................................10
Online Support............................................................................................................................................10
Email and Telephone Support....................................................................................................................10
Warranty Registration.................................................................................................................................10
Returning Products.....................................................................................................................................10
Sales or Corporate Information ..................................................................................................................10
Management Software Updates .................................................................................................................10
Chapter 1
Overview ...............................................................................................................................................................................................................11
Description .......................................................................................................................................................12
AT-9408LC/SP Switch................................................................................................................................12
AT-9424T/GB Switch..................................................................................................................................13
AT-9424T/SP Switch ..................................................................................................................................14
AT-9424Ts Switch ......................................................................................................................................15
AT-9424Ts/XP Switch ................................................................................................................................16
AT-9448Ts Switch ......................................................................................................................................17
AT-9448T/SP Switch ..................................................................................................................................18
AT-9448Ts/XP Switch ................................................................................................................................19
10/100/1000Base-T Twisted Pair Ports ...........................................................................................................20
Connector Type ..........................................................................................................................................20
Speed .........................................................................................................................................................20
Duplex Mode ..............................................................................................................................................20
Maximum Distance .....................................................................................................................................21
Cable Type .................................................................................................................................................21
Auto-MDI/MDI-X .........................................................................................................................................21
Port Pinouts ................................................................................................................................................21
Fiber Optic Ports ..............................................................................................................................................22
Connector Type ..........................................................................................................................................22
Speed .........................................................................................................................................................22
Maximum Distance and Cabling.................................................................................................................22
GBIC Transceiver Slots ...................................................................................................................................23
SFP Transceiver Slots .....................................................................................................................................24
XFP Transceiver Slots .....................................................................................................................................25
Redundant Twisted Pair Ports .........................................................................................................................26
Compact Flash Card Slot .................................................................................................................................28
Port LEDs .........................................................................................................................................................29
10/100/1000Base-T Twisted Pair Port LEDs..............................................................................................29
Fiber Optic Port and Transceiver Slot LEDs...............................................................................................30
System LEDs ...................................................................................................................................................31
Expansion Slot and STACK LEDs ...................................................................................................................32
Terminal Port ...................................................................................................................................................33
Table of Contents
6
AT-RPS3204 Redundant Power Supply ..........................................................................................................34
AC Power Connector ........................................................................................................................................35
Chapter 2
Installation .......................................................................................................................................................................................................... 37
Reviewing Safety Precautions ..........................................................................................................................38
Selecting a Site ................................................................................................................................................40
Planning the Installation ...................................................................................................................................41
Twisted Pair Cabling...................................................................................................................................41
Fiber Optic Cabling .....................................................................................................................................42
Optional Transceiver Cabling .....................................................................................................................42
Unpacking the Switch .......................................................................................................................................43
Installing the Power Cord Retaining Clip (AC Switches Only) ..........................................................................44
Installing the Switch in a Rack ..........................................................................................................................46
Installing an Optional Transceiver ....................................................................................................................48
Installing a GBIC Transceiver .....................................................................................................................48
Installing an SFP Transceiver.....................................................................................................................49
Installing an XFP Transceiver.....................................................................................................................51
Cabling the Switch ............................................................................................................................................53
Applying AC Power ..........................................................................................................................................54
Starting a Local Management Session .............................................................................................................56
Warranty Registration .......................................................................................................................................58
Chapter 3
Troubleshooting ............................................................................................................................................................................................. 59
Power LED is Off ..............................................................................................................................................60
Twisted Pair Port Link LED is Off .....................................................................................................................61
Fiber Optic Port Link LED is Off .......................................................................................................................62
Transceiver is Installed but the Status is “Not Present” ...................................................................................63
System Fault LED is Blinking ...........................................................................................................................64
System Fault LED is Steadily On .....................................................................................................................65
Cannot Establish a Local (Out-of-Band) Management Session .......................................................................66
Switch Functions Intermittently .........................................................................................................................67
Appendix A
Technical Specifications ........................................................................................................................................................................... 69
Physical Specifications .....................................................................................................................................69
Environmental Specifications ...........................................................................................................................69
Power Specifications ........................................................................................................................................70
Certifications .....................................................................................................................................................70
RJ-45 Twisted Pair Port Pinouts ......................................................................................................................71
AT-9408LC/SP Switch 1000Base-SX Port Specifications ................................................................................73
RJ-45 Style Serial Terminal Port Pinouts .........................................................................................................74
RPS 21-pin D-combo Port and Connector Pinouts ..........................................................................................74
Appendix B
Translated Safety Statements ................................................................................................................................................................ 77
7
Preface
This guide contains the installation instructions for the AT-9400 Layer 2+
Gigabit Ethernet Series switches. This preface contains the following
sections:
“Safety Symbols Used in this Document” on page 8
“Where to Find Web-based Guides” on page 9
“Contacting Allied Telesyn” on page 10
Note
For a list of features, refer to Appendix C, “Features and Standards,”
in the latest version of the AT-S63 Management Software Menus
Interface User’s Guide, available from the Allied Telesyn web site.
Preface
8
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-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
9
Where to Find Web-based Guides
The installation and user guides for all Allied Telesyn products are
available in portable document format (PDF) on our web site at
www.alliedtelesyn.com. You can view the documents online or download
them onto a local workstation or server.
Preface
10
Contacting Allied Telesyn
This section provides Allied Telesyn contact information for technical
support as well as sales and corporate information.
Online Support You can request technical support online by accessing the Allied Telesyn
Knowledge Base: http://kb.alliedtelesyn.com. 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 Support &
Services section of the Allied Telesyn web site at
www.alliedtelesyn.com.
Warranty
Registration
For warranty information or to register your product, go to the Allied
Telesyn web site at www.alliedtelesyn.com.
Returning
Products
Products for return or repair must first be assigned a return materials
authorization (RMA) number. A product sent to Allied Telesyn without an
RMA number will be returned to the sender at the sender’s expense.
To obtain an RMA number, contact Allied Telesyn Technical Support
through our web site at www.alliedtelesyn.com.
Sales or
Corporate
Information
You can contact Allied Telesyn for sales or corporate information through
our web site at www.alliedtelesyn.com.
Management
Software Updates
New releases of management software for our managed products are
available from the following Internet sites:
Allied Telesyn web site: www.alliedtelesyn.com
Allied Telesyn FTP server: ftp://ftp.alliedtelesyn.com
To download new software from the Allied Telesyn FTP server from your
workstation’s command prompt, you must have FTP client software and
must log in to the server. Enter “anonymous” for the user name and your
email address for the password.
11
Chapter 1
Overview
The AT-9400 Series switches are managed, Layer 2+ Gigabit Ethernet
switches that offer a wide range of features and capabilities for Ethernet,
Fast Ethernet, and Gigabit Ethernet networks. The models in the AT-9400
Series are:
AT-9408LC/SP
AT-9424T/GB
AT-9424T/SP
AT-9424Ts
AT-9424Ts/XP
AT-9448Ts
AT-9448T/SP
AT-9448Ts/XP
This chapter contains the following sections:
“Description” on page 12
“10/100/1000Base-T Twisted Pair Ports” on page 20
“Fiber Optic Ports” on page 22
“GBIC Transceiver Slots” on page 23
“SFP Transceiver Slots” on page 24
“XFP Transceiver Slots” on page 25
“Redundant Twisted Pair Ports” on page 26
“Compact Flash Card Slot” on page 28
“Port LEDs” on page 29
“System LEDs” on page 31
“Expansion Slot and STACK LEDs” on page 32
“Terminal Port” on page 33
“AT-RPS3204 Redundant Power Supply” on page 34
“AC Power Connector” on page 35
Chapter 1: Overview
12
Description
The following sections describe the AT-9400 Series switches.
AT-9408LC/SP
Switch
The AT-9408LC/SP switch features:
Eight 1000Base-SX fiber optic ports with LC-duplex connectors
Four small form-factor pluggable (SFP) transceiver slots
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, SFP transceiver slots, and system
Redundant power supply (RPS) connector
Compact flash card slot
Figure 1 shows the front and back panels of the AT-9408LC/SP switch.
Figure 1 AT-9408LC/SP Switch - Front and Back Panels
100-240VAC
~
RPS INPUT
462
AT-9408LC/SP
Gigabit Ethernet Switch
COMPACT FLASH
FAU LT
MASTER
RPS
POWER
EJECT
STATU S
TERMINAL
PORT
12345678
9101112
PORT ACTIVITY
CLASS 1
LASER PRODUCT
SFP SFP SFP SFP
L/AL/AL/AL/AL/AL/AL/AL/AL/AL/AL/AL/A
LINK / ACT
L/A
461
System LEDs
Compact Flash
Card Slot
RJ-45 Style
Serial
Terminal Port
1000Base-SX Fiber Optic Ports
AC Power Connector
RPS Connector
SFP Transceiver Slots
Port LED (one per port)
AT-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
13
AT-9424T/GB
Switch
The AT-9424T/GB has the following features:
24 10/100/1000Base-T ports
Two gigabit interface connector (GBIC) transceiver slots
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, transceiver slots, and system
Redundant power supply connector
Figure 2 shows the front and back panels of the AT-9424T/GB switch.
Figure 2 AT-9424T/GB Switch - Front and Back Panels
AC Power
Connector
RPS Connector
10/100/1000Base-T Ports
GBIC Transceiver Slots
Port and Transceiver
FAULT
RPS
MASTER
POWER
GBIC
23
GBIC
24
CLASS 1
LASER PRODUCT
STATUS
TERMINAL
PORT
1 3 57911
2468 10 12
13 15 17 19 21 23R
14 16 18 20 22 24R
AT-9424T/GB
Gigabit Ethernet Switch
1 3 5791113 15 17 19 21 23R
2468 10 12 14 16 18 20 22 24R
23 24
L/A
D/C
D/C
L/A
D/C
L/A
1000 LINK / ACT
HDX /
COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
L/A
1000 LINK / ACT
GBIC
RJ-45 Style Serial
Terminal Port
System
LEDs
Slot LEDs
RPS INPUT
100-240VAC~
Chapter 1: Overview
14
AT-9424T/SP
Switch
The AT-9424T/SP switch has the following features:
24 10/100/1000Base-T ports
Two Gigabit Ethernet small form-factor pluggable (SFP) transceiver
slots
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, transceiver slots, and system
Redundant power supply connector
Figure 3 shows the front and back panels of the AT-9424T/SP switch.
Figure 3 AT-9424T/SP Switch - Front and Back Panels
10/100/1000Base-T Ports
Port and SFP
RJ-45 Style Serial
Terminal Port
SFP Transceiver Slots
FAULT
RPS
MASTER
POWER
CLASS 1
LASER PRODUCT
STATUS
TERMINAL
PORT
1 3 57911
2468 10 12
13 15 17 19 21 23R
14 16 18 20 22 24R
AT-9424T/SP
Gigabit Ethernet Switch
1 3 5791113 15 17 19 21 23R
2468 10 12 14 16 18 20 22 24R
23 24
L/A
D/C
D/C
L/A
D/C
L/A
1000 LINK / ACT
HDX /
COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
L/A
1000 LINK / ACT
SFP
SFP
24
SFP
23
AC Power
Connector
RPS Connector
Slot LEDs
System
LEDs
RPS INPUT
100-240VAC~
AT-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
15
AT-9424Ts
Switch
The AT-9424Ts switch features:
24 10/100/1000Base-T ports
Four Gigabit Ethernet small form-factor pluggable (SFP) transceiver
slots
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, transceiver slots, and system
Redundant power supply connector
Compact flash card slot
Figure 4 shows the front and back panels of the AT-9424Ts switch.
Figure 4 AT-9424Ts Switch - Front and Back Panels
10/100/1000Base-T Ports
Port and SFP
RJ-45 Style Serial
Terminal Port
SFP Transceiver Slots
AC Power
Connector
RPS Connector
Slot LEDs
System
LEDs
1 3 57911 13 15 17 19 21R 23R
2468 10 12 14 16 18 20 22R 24R
CLASS 1
LASER PRODUCT
AT-9424Ts
Gigabit Ethernet Switch
1 3 5791113 15 17 19 21R 23R
2468 10 12 14 16 18 20 22R 24R
EJECT
TERMINAL
PORT
COMPACT FLASH
FAU LT
RPS
MASTER
POWER
STATUS
SFP
21 22 23 24
L/A
D/C
D/C
L/AL/A
D/C
L/A
1000 LINK /
ACT
HDX /
COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
STACK
PRES
MSTR
21
22
23
24
SFP
L/A
1
2
L/A
RPS INPUT
100-240VAC~
Expansion Slot
Chapter 1: Overview
16
AT-9424Ts/XP
Switch
The AT-9424Ts/XP switch features:
24 10/100/1000Base-T ports
Four Gigabit Ethernet small form-factor pluggable (SFP) transceiver
slots
Two 10 Gigabit Ethernet small form factor pluggable (XFP) transceiver
slots
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, transceiver slots, and system
Redundant power supply connector
Compact flash card slot
Figure 5 shows the front and back panels of the AT-9424Ts/XP switch.
Figure 5 AT-9424Ts/XP Switch - Front and Back Panels
10/100/1000Base-T Ports
Port and SFP
RJ-45 Style Serial
Terminal Port
SFP Slots
AC Power
Connector
RPS Connector
Slot LEDs
System
LEDs
1 3 57911 13 15 17 19 21R 23R
2468 10 12 14 16 18 20 22R 24R
CLASS 1
LASER PRODUCT
AT-9424Ts/XP
Gigabit Ethernet Switch
1 3 5791113 15 17 19 21R 23R
2468 10 12 14 16 18 20 22R 24R
EJECT
TERMINAL
PORT
COMPACT FLASH
FAU LT
RPS
MASTER
POWER
STATUS
SFP
21 22 23 24
L/A
D/C
D/C
L/AL/A
D/C
L/A
1000 LINK /
ACT
HDX /
COL
FDX
10/100 LINK / ACT
PORT ACTIVITY
STACK
PRES
MSTR
21
22
23
24
SFP
L/A
1
2
L/A
L/A
25 26
XFP
XFP
XFP Slots
RPS INPUT
100-240VAC~
Expansion Slot
AT-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
17
AT-9448Ts
Switch
The AT-9448Ts switch has the following features:
48 10/100/1000Base-T ports
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, transceiver slots, and system
Redundant power supply connector
Compact flash card slot
Expansion slot
Figure 6 shows the front and back panels of the AT-9448Ts switch.
Figure 6 AT-9448Ts Switch - Front and Back Panels
Port
LEDs
AC Power
Connector
RPS Connector
10/100/1000Base-T Ports
RJ-45 Style Serial
Terminal Port
System LEDs
RPS INPUT
100-240VAC~
Expansion Slot
Compact Flash
Card Slot
AT-9448Ts
STAT US
FAULT
MASTER
RPS
POWER
COMPACT FLASH
TERMINAL PORT
EJECT
151 3 5791113 17 3331 473519 21 23 25 27 29 37 394143 45
1000 LINK / ACT
10/100 LINK / ACT
FDX
HDX / COL
D/C
L/A
L/A D/C
STACK
PRES
L/A
L/A
34
4836 38 40 42 44 46
3216
2468 10 12 14 22 24 26 2830
18
20
1
2
MSTR
Chapter 1: Overview
18
AT-9448T/SP
Switch
The AT-9448T/SP switch features:
48 10/100/1000Base-T ports
Four Gigabit Ethernet SFP transceiver slots
An RJ-45 style serial terminal port for local (out-of-band) management.
Status LEDs for the ports, transceiver slots, and system
Redundant power supply (RPS) connector
Compact flash card slot
Figure 7 shows the front and back panels of the AT-9448T/SP switch.
Figure 7 AT-9448T/SP Switch - Front and Back Panels
AC Power
Connector
RPS Connector
10/100/1000Base-T Ports
SFP Transceiver
RJ-45 Style Serial
Terminal Port
Slots and LEDs
System LEDs
RPS INPUT
100-240VAC~
AT-9448T/SP
COMPACT FLASH
TERMINAL PORT
EJECT
45
48
151 3 5791113 17 3331 47R3519 21 23 25 27 29 37 394143 45R
1000 LINK / ACT
10/100 LINK / ACT
FDX
HDX / COL
D/C
L/A
L/A D/C
CLASS 1
LASER PRODUCT
L/A
SFP
LINK / ACT
34
48R36 38 40 42 44 46R
3216
2468 10 12 14 22 24 26 2830
18
20
L/A
STATUS
FLT
MSTR
RPS
PWR
47
46
L/A
SFP
L/A
SFP
L/A
SFP
Compact Flash
Card Slot
Port
LEDs
AT-9400 Series Layer 2+ Gigabit Ethernet Switches Installation Guide
19
AT-9448Ts/XP
Switch
The AT-9448Ts/XP switches features:
48 10/100/1000Base-T ports
Two 10 Gigabit Ethernet small form factor pluggable (XFP) transceiver
slots
An RJ-45 style serial terminal port for local (out-of-band) management
Status LEDs for the ports, transceiver slots, and system
Redundant power supply connector
Compact flash card slot
Expansion slot
Figure 8 shows the front and back panels of the AT-9448Ts/XP switch.
Figure 8 AT-9448Ts/XP Switch - Front and Back Panels
Port
LEDs
AC Power
Connector
RPS Connector
10/100/1000Base-T Ports
XFP Transceiver
RJ-45 Style Serial
Terminal Port
Slots and LEDs
System LEDs
AT-9448Ts/XP
STAT US
FAULT
MASTER
RPS
POWER
COMPACT FLASH
TERMINAL PORT
EJECT
49 50
151 3 5791113 17 3331 473519 21 23 25 27 29 37 394143 45
1000 LINK / ACT
10/100 LINK / ACT
FDX
HDX / COL
D/C
L/A
L/A D/C
CLASS 1
LASER PRODUCT
L/A
XFP XFP
LINK / ACT
STACK
PRES
L/A
L/A
34
4836 38 40 42 44 46
3216
2468 10 12 14 22 24 26 2830
18
20
1
2
MSTR
RPS INPUT
100-240VAC~
Expansion Slot
Compact Flash
Card Slot
Chapter 1: Overview
20
10/100/1000Base-T Twisted Pair Ports
This section describes the twisted pair ports on the AT-9424T/GB,
AT-9424T/SP, AT-9448Ts, AT-9448T/SP, and AT-9448Ts/XP switches.
Connector Type The ports have 8-pin RJ-45 connectors. The ports use four pins when
operating at 10 or 100 Mbps and all eight pins when operating at 1000
Mbps. For pin assignments, refer to “RJ-45 Twisted Pair Port Pinouts” on
page 71.
Speed The ports can operate at 10, 100, or 1000 Mbps. The speed can be set
automatically through Auto-Negotiation, which is the default setting, or you
can set the speed manually through the AT-S63 management software.
Note
A port must be set to Auto -Negotiation to operate at 1000 Mbps.
You cannot manually set the speed of a twisted pair port to 1000
Mbps.
Duplex Mode A twisted pair port can operate in either half- or full-duplex mode. (Full-
duplex mode is the only mode available when a port is operating at 1000
Mbps.) The twisted pair ports are IEEE 802.3u-compliant and Auto-
Negotiate the duplex mode setting.
You can disable Auto-Negotiation on one or all of the switch ports so that
you can set the duplex mode manually through the AT-S63 management
software.
Note
In order for a switch port to successfully Auto-Negotiate its duplex
mode with a 10 or 100 Mbps end node, the end node should also be
configured for Auto-Negotiation. Otherwise, a duplex mode
mismatch can occur. A switch port using Auto-Negotiation defaults
to half-duplex if it detects that the end node is not using Auto-
Negotiation. This results in a mismatch if the end node is operating
at a fixed duplex mode of full-duplex.
To avoid this problem when connecting an end node with a fixed
duplex mode of full-duplex to a switch port, use the AT-S63
management software to disable Auto-Negotiation on the port and
set the port speed and duplex mode manually.
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Allied Telesis AT-9424T/SP Series Installation guide

Allied Telesis
Brand
Allied Telesis
Model
AT-9424T/SP Series
Category
Network switches
Type
Installation guide
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