Allied Telesis AT-8550SP User Manual
AT-8500 Series
Layer 2+ Fast
Ethernet Switches
AT-8516F/SC
AT-8524M
AT-8524POE
AT-8550GB
AT-8550SP
Installation Guide
613-000818 Rev. B
Copyright © 2008 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.
Electrical Safety and Emissions Standards
This product meets the following standards.
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.
RFI Emissions FCC Class A, EN55022 Class A, EN61000-3-2, EN61000-3-3, VCCI
Class A, C-TICK, CE
Warning: In a domestic environment this product may cause radio interference in
which case the user may be required to take adequate measures.
Immunity EN55024
Electrical Safety EN60950 (TUV), UL 60950 (
CULUS
)
Laser Safety EN60825
3
Translated Safety Statements
Important: The indicates that a translation of the safety statement is available in a PDF
document titled “Translated Safety Statements” (613-000405) posted on the Allied Telesis website at
www.alliedtelesis.com.
4
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
Returning Products........................................................................................................................................................14
For Sales or Corporate Information...............................................................................................................................14
Warranty........................................................................................................................................................................14
Management Software Updates ....................................................................................................................................14
Chapter 1: Overview ..........................................................................................................................................................15
Model Configurations............................................................................................................................................................16
Model Descriptions ...............................................................................................................................................................17
AT-8516F/SC ................................................................................................................................................................17
AT-8524M......................................................................................................................................................................18
AT-8524POE .................................................................................................................................................................19
AT-8550GB ...................................................................................................................................................................20
AT-8550SP....................................................................................................................................................................21
Port Descriptions ..................................................................................................................................................................22
10/100Base-TX Twisted Pair Ports ...............................................................................................................................22
10/100/1000Base-T Twisted Pair Ports.........................................................................................................................24
100Base-FX Fiber Optic Ports ......................................................................................................................................25
Power Over Ethernet ............................................................................................................
Power Budgeting ...........................................................................................................................................................27
Implementation..............................................................................................................................................................28
GBIC and SFP Slots.............................................................................................................................................................29
Module Expansion Slots .......................................................................................................................................................30
LEDs.....................................................................................................................................................................................31
Twisted Pair Port LEDs and the LED Mode Select Button............................................................................................31
Fiber Optic Port LEDs ...................................................................................................................................................34
GBIC and SFP Expansion Slot LEDs............................................................................................................................35
System LEDs.................................................................................................................................................................36
RS-232 Terminal Port...........................................................................................................................................................37
Power Options and Connectors............................................................................................................................................38
RPS Connector .............................................................................................................................................................38
AC Power Connector.....................................................................................................................................................39
DC Power Connector ....................................................................................................................................................39
A Few Basics about Ethernet Switching...............................................................................................................................40
MAC Address Table ......................................................................................................................................................40
Duplex Mode .................................................................................................................................................................40
Store and Forward.........................................................................................................................................................41
Back Pressure and Flow Control...................................................................................................................................41
Network Topologies..............................................................................................................................................................43
Power Workgroup Topology ..........................................................................................................................................43
Collapsed Backbone Topology......................................................................................................................................43
Mixed Topology .............................................................................................................................................................44
................................................27
Chapter 2: Installation .......................................................................................................................................................47
Reviewing Safety Precautions..............................................................................................................................................48
5
Contents
Selecting a Site for the Switch ..............................................................................................................................................51
Planning the Installation........................................................................................................................................................52
Unpacking the Switch ...........................................................................................................................................................54
Installing the Switch in a Rack ..............................................................................................................................................55
Installing an Optional Expansion or Stacking Module...........................................................................................................58
Installing an Optional GBIC...................................................................................................................................................60
Installing an Optional SFP Transceiver.................................................................................................................................62
Cabling the Switch ................................................................................................................................................................64
Cabling Twisted Pair Ports ............................................................................................................................................64
Cabling Fiber Optic Ports...............................................................................................................................................65
Cabling Expansion Modules ..........................................................................................................................................67
Powering on an AC Powered Switch ....................................................................................................................................68
Wiring and Powering on an DC Powered Unit ......................................................................................................................70
Starting a Local Management Session .................................................................................................................................73
Warranty Registration ...........................................................................................................................................................75
Chapter 3: Troubleshooting ..............................................................................................................................................77
PWR LED is Off ....................................................................................................................................................................77
Twisted Pair Port Link LED is Off..........................................................................................................................................77
Fiber Optic Port Link LED is Off............................................................................................................................................78
PoE Device is Not Receiving Power .....................................................................................................................................79
Fault LED is On Continuously...............................................................................................................................................79
Cannot Establish a Local Management Session ..................................................................................................................80
Appendix A: Technical Specifications .............................................................................................................................81
Physical Specifications .........................................................................................................................................................81
Environmental Specifications...................................................................................................
Power Specifications.............................................................................................................................................................82
Safety and Electromagnetic Emissions Certifications...........................................................................................................82
RJ-45 Twisted Pair Port Pinouts...........................................................................................................................................83
AT-8516F/SC Fiber Optic Port Specifications.......................................................................................................................85
RS-232 Terminal Port Pinouts ..............................................................................................................................................86
RPS Connector Port Pinouts ................................................................................................................................................87
Dual SC Type Connector......................................................................................................................................................90
.............................................81
6
Figures
Figure 1. AT-8516F/SC Switch Front and Back Panels 9
Figure 2. AT-8524M Switch Front and Back Panels 10
Figure 3. AT-8524POE Switch Front and Back Panels 11
Figure 4. AT-8550GB Switch Front and Back Panels 12
Figure 5. AT-8550SP Switch Front and Back Panels 13
Figure 6. GBIC Module 21
Figure 7. SFP Transceiver 21
Figure 8. AT-RPS3004 Redundant Power Supply Unit 30
Figure 9. Power Workgroup Topology 35
Figure 10. Collapsed Backbone Topology 36
Figure 11. Mixed Topology 37
Figure 12. Rack Mount Bracket Positions 47
Figure 13. Removing the Feet 48
Figure 14. Removing the Expansion Slot Faceplate 50
Figure 15. Installing a Module 51
Figure 16. Securing the Module in the Expansion Slot 51
Figure 17. Optical Bore and Ferrule of GBIC Module 53
Figure 18. Installing a GBIC Module 53
Figure 19. Connecting the Twisted Pair Data Cables 56
Figure 20. Removing the Dust Covers from the Fiber Optic Ports 57
Figure 21. Attaching a Fiber Optic Cable 58
Figure 22. Dual SC Port 58
Figure 23. Connecting the AC Power Cord 60
Figure 24. Connecting the RPS DC Cable 61
Figure 25. Positive, Ground, and Negative Terminals 62
Figure 26. Stripped Wire 63
Figure 27. Connecting the Stripped Wire 63
Figure 28. Connecting an RS-232 Cable to the RS-232 Terminal Port on an AT-8524M Switch 65
Figure 29. RJ-45 Connector and Port Pin Layout 75
Figure 30. RPS 16-pin Molex Connector Pin Layout 79
Figure 31. AT-8524POE RPS Connector Pin Layout 80
Figure 32. Dual SC Connector 82
7
Figures
Figure 1. AT-8516F/SC Switch Front and Back Panels.......................................................................................................17
Figure 2. AT-8524M Switch Front and Back Panels ............................................................................................................18
Figure 3. AT-8524POE Switch Front and Back Panels .......................................................................................................19
Figure 4. AT-8550GB Switch Front and Back Panels..........................................................................................................20
Figure 5. AT-8550SP Switch Front and Back Panels ..........................................................................................................21
Figure 6. GBIC Module ........................................................................................................................................................29
Figure 7. SFP Transceiver...................................................................................................................................................29
Figure 8. AT-RPS3004 Redundant Power Supply Unit .......................................................................................................38
Figure 9. Power Workgroup Topology .................................................................................................................................43
Figure 10. Collapsed Backbone Topology...........................................................................................................................44
Figure 11. Mixed Topology ..................................................................................................................................................45
Figure 12. Rack Mount Bracket Positions............................................................................................................................55
Figure 13. Removing the Feet .............................................................................................................................................56
Figure 14. Removing the Expansion Slot Faceplate ............................................................................................................58
Figure 15. Installing a Module..............................................................................................................................................59
Figure 16. Securing the Module in the Expansion Slot ........................................................................................................59
Figure 17. Optical Bore and Ferrule of GBIC Module ..........................................................................................................61
Figure 18. Installing a GBIC Module....................................................................................................................................61
Figure 19. Connecting the Twisted Pair Data Cables ..........................................................................................................64
Figure 20. Removing the Dust Covers from the Fiber Optic Ports.......................................................................................65
Figure 21. Attaching a Fiber Optic Cable.............................................................................................................................66
Figure 22. Dual SC Port.......................................................................................................................................................66
Figure 23. Connecting the AC Power Cord..........................................................................................................................68
Figure 24. Connecting the RPS DC Cable...........................................................................................................................69
Figure 25. Positive, Ground, and Negative Terminals .........................................................................................................70
Figure 26. Stripped Wire......................................................................................................................................................71
Figure 27. Connecting the Stripped Wire.......................................................................................
Figure 28. Connecting an RS-232 Cable to the RS-232 Terminal Port on an AT-8524M Switch ........................................73
Figure 29. RJ-45 Connector and Port Pin Layout ................................................................................................................83
Figure 30. RPS 16-pin Molex Connector Pin Layout ...........................................................................................................87
Figure 31. AT-8524POE RPS Connector Pin Layout ..........................................................................................................88
Figure 32. Dual SC Connector.............................................................................................................................................90
......................................71
8
Tables
Table 1. Safety Symbols .....................................................................................................................................................12
Table 2. Model Configurations ............................................................................................................................................16
Table 3. IEEE 802.3af Class vs. Power Levels ..................................................................................................................28
Table 4. LEDs for the 10/100Base-TX Twisted Pair Ports on the AT-8524M, AT-8550GB, and AT-8550SP Switches ..... 31
Table 5. LEDs for Ports 49R and 50R on the AT-8550GB and AT-8550SP Switches .......................................................32
Table 6. LEDs for the 10/100Base-TX Twisted Pair Ports on the AT-8524POE Switch .....................................................33
Table 7. LEDs for the Fiber Optic Ports on the AT-8516F/SC Switch ................................................................................35
Table 8. LEDs for the Optional GBIC and SFP Ports on an AT-8550GB and AT-8550SP Switches .................................35
Table 9. System LEDs ........................................................................................................................................................36
Table 10. Twisted Pair Cabling and Distances ...................................................................................................................52
Table 11. Fiber Optic Cabling and Distances .....................................................................................................................53
Table 12. 10/100Base-TX Port MDI/MDI-X Pin Signals ....................................................................................................83
Table 13. 10/100Base-T Port MDI/MDI-X Pin Signals with PoE .........................................................................................83
Table 14. MDI and MDI-X Pin Signals (1000Base-T) .........................................................................................................84
Table 15. RS-232 Terminal Port Pin Signals ......................................................................................................................86
Table 16. Pin Definitions of the 16-pin RPS Connector ......................................................................................................87
Table 17. Pin Definitions for the RPS Connector on the AT-8524POE Switch ...................................................................88
9
Tables
10
Preface
This guide provides the hardware installation instructions for you
managed, Layer 2+ AT-8500 Series Fast Ethernet 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
11
Preface
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.
12
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.
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
13
Preface
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
Returning
Products
For Sales or
Corporate
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.
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.
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.
Information
Warranty The AT-8500 Series Layer 2+ Fast Ethernet Switches have a Lifetime
Warranty (two years fan and PSU). Go to www.alliedtelesis.com/
warranty for the specific terms and conditions of the warranty and for
warranty registration.
Management
Software Updates
14
New releases of management software for our managed products are
available from either of the following Internet sites:
r Allied Telesis web site: www.alliedtelesis.com
r Allied Telesis FTP server: ftp://ftp.alliedtelesis.com
If you prefer to download new software from the Allied Telesis FTP server
from your workstation’s command prompt, you will need FTP client
software and you must log in to the server. Enter “anonymous” for the user
name and your email address for the password.
Chapter 1
Overview
The AT-8500 Series switches are managed, Layer 2+ Fast Ethernet
switches. These switches are designed to simplify the task of creating or
expanding an Ethernet or Fast Ethernet network. This chapter contains the
following sections:
“Model Configurations” on page 16
“Model Descriptions” on page 17
“Port Descriptions” on page 22
“Power Over Ethernet” on page 27
“GBIC and SFP Slots” on page 29
“Module Expansion Slots” on page 30
“LEDs” on page 31
“RS-232 Terminal Port” on page 37
“Power Options and Connectors” on page 38
“A Few Basics about Ethernet Switching” on page 40
“Network Topologies” on page 43
15
Chapter 1: Overview
Model Configurations
Table 2 lists the basic model configurations.
AT-8516F/SC 16 100Base-FX ports with dual SC connectors plus
AT-8524M 24 10/100Base-TX ports plus two expansion slots for
AT-8524POE 24 10/100Base-TX ports with Power Over Ethernet
Table 2. Model Configurations
Model Configuration
two expansion slots for optional fiber optic and
twisted pair port expansion modules.
optional fiber optic and twisted pair port expansion
modules.
technology, plus two expansion slots for optional
fiber optic and twisted pair port expansion modules.
AT-8550GB 48 10/100Base-TX ports, two 10/100/1000Base-T
ports, and two expansion slots for optional GBIC
modules.
AT-8550SP 48 10/100Base-TX ports, two 10/100/1000Base-T
ports, and two expansion slots for optional SFP
modules.
16
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
FAULT
RPS
MASTER
PWR
STATUS
1817
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
D/C
L/A
LINK / ACTIVITY
HALF DUP/
COL
FULL DUP
L/A
D/C
PORT ACTIVITY
AT-8516F/SC
100Base-FX Fast Ethernet Switch
RS-232 TERMINAL PORT
1TX RX
9TX RX
2TX RX
10TX RX
3TX RX
11TX RX
4TX RX
12TX RX
5TX RX
13TX RX
6TX RX
14TX RX
7TX RX
15TX RX
8TX RX
16TX RX
RS-232
Module Expansion Slots
100Base-FX Ports
Terminal Port
System LEDs
Port LEDs
RPS Connector
AC Power Connector
Model Descriptions
AT-8516F/SC The AT-8516F/SC switch has 16 100Base-FX fiber optic ports with dual
SC connectors. The ports operate at 100 Mbps, half- or full-duplex mode,
and have a maximum operating distance of 2 kilometers (1.24 miles) or
412 meters (1,360 feet), depending on the duplex mode, using 50/125 or
62.5/125 micron (core/cladding) multimode fiber optic cable.
Figure 1 illustrates the front panel of the AT-8516F/SC switch.
100-240VAC
~
RPS INPUT
Figure 1. AT-8516F/SC Switch Front and Back Panels
17
Chapter 1: Overview
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 10 12 14 16 18 20 22 24
LINK
MODE
LINK
MODE
COL
100
FULL
ACT
FAULT
RPS
MASTER
PWR
MODE
1357 911
2
4
6
8
10 12
13 15 17
19 21 23
14
16
18 20 22 24
STATUS
2625
AT-8524M
Fast Ethernet Switch
10/100Base-TX Ports
Port Status
LED Mode
Select Button
System
LEDs
LEDs
Module Expansion Slots
RS-232
Terminal Port
AC Power Connector
RPS Connector
AT-8524M The AT-8524M switch has 24 10/100Base-TX twisted pair ports and two
module expansion slots. The twisted pair ports feature RJ-45 connectors
and have a maximum operating distance of 100 meters (328 feet) using
Category 3 or better 100 ohm twisted pair cable for 10Base-T operation
and Category 5 or 5E 100 ohm twisted pair cable for 100Base-TX
operation.
The expansion slots are compatible with 100Base and 1000Base fiber
optic and twisted pair port expansion modules and the AT-STACKM
stacking module.
Figure 2 shows the front and back panels of the AT-8524M switch.
~
100-240VAC
Figure 2. AT-8524M Switch Front and Back Panels
RPS INPUT
18
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
10/100Base-TX Ports
100-240VAC
~
RPS INPUT
RPS INPUT VDC A Max
48V
12V
3.3V
8.5A
3A
15A
with PoE
Module Expansion Slots
Port Status
LEDs
LED Mode
Select Button
System
LEDs
RS-232
Terminal Port
AC Power Connector
RPS Connector
AT-8524POE The AT-8524POE switch has 24 10/100Base-TX ports with Power over
Ethernet (PoE) capability. (For a description of this feature, refer to “Power
Over Ethernet” on page 27.) The ports feature RJ-45 connectors and have
a maximum operating distance of 100 meters (328 feet) using twisted pair
cable. The ports, when not using PoE, can use Category 3 or better 100
ohm twisted pair cable for 10Base-T operation and Category 5 or 5E 100
ohm twisted pair cable for 100Base-TX operation. For ports using PoE,
Category 5 or 5E 100 ohm twisted pair cable is required for both 10 and
100 Mbps operation.
The switch also features two expansion slots that are compatible with
100Base and 1000Base fiber optic and twisted pair port expansion
modules and the AT-STACKM stacking module.
Figure 3 shows the front and back panels of the AT-8524POE switch.
AT-8524POE
1357 911
25
26
2
4
8
6
10 12
13 15 17
14
16
19 21 23
18 20 22 24
10 LINK ACT
100 LINK ACT
FDX
HDX
COL
PD ON MAX CURRENTPD ERR
1 3 5 7 9 11 13 15 17 19 21 23
2 4 6 8 10 12 14 16 18 20 22 24
MODE
Fast Ethernet Switch
PoE
STATUS
FAULT
MASTER
RPS
PWR
Figure 3. AT-8524POE Switch Front and Back Panels
19
Chapter 1: Overview
Note
COL
SPD
FDX
ACT
FLT
RPS
MSTR
PWR
STATUS
AT-8550GB
Fast Ethernet Switch
LINK
LINK
LINK
MAIN PORTS
13579
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
MODELINK 49R
49
50
GBIC
UPLINK PORTS
CLASS 1
LASER PRODUCT
MODE
MODELINK 50R
10/100Base-TX Ports
Port LEDs
10/100/1000Base-T Ports
GBIC Slots
100-240VAC
~
RPS INPUT
RS-232
Terminal Port
AC Power Connector
RPS Connector
LED Mode
Select Button
System
LEDs
AT-8550GB The AT-8550GB switch has 48 10/100Base-TX twisted pair ports, capable
of operating at either 10 or 100 Mbps, with RJ-45 connectors. These ports
have a maximum operating distance of 100 meters (328 feet) using
Category 3 or better 100 ohm twisted pair cable for 10Base-T operation
and Category 5 or 5E 100 ohm twisted pair cable for 100Base-TX
operation.
The switch has two 10/100/1000Base-T twisted pair ports, labelled Ports
49R and 50R. They have RJ-45 connectors, require Category 5 or 5E 100
ohm twisted pair cable, and have a maximum operating distance of 100
meters (328 feet).
The switch also has two slots for two Gigabit Interface Converters
(GBICs). You can use the GBICs to add 1000Base-X fiber optic ports to
the switch to extend the distance of your network. For a list of GBICs
supported by the switch, contact your Allied Telesis sales representative
or refer to the Allied Telesis web site: www.alliedtelesis.com.
The twisted pair ports 49R and 50R change to a redundant status
when GBICs are installed and establish links with their end nodes. A
link on a GBIC port always takes precedence over that of the
corresponding 10/100/1000Base-T twisted pair port.
Figure 4 shows the front and back panels of the AT-8550GB switch.
Figure 4. AT-8550GB Switch Front and Back Panels
20
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
Note
COL
SPD
FDX
ACT
FLT
RPS
MSTR
PWR
STATUS
AT-8550SP
Fast Ethernet Switch
LINK
LINK
LINK
MAIN PORTS
13579
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
MODELINK 49R
49
50
SFP
UPLINK PORTS
CLASS 1
LASER PRODUCT
MODE
MODELINK 50R
Port LEDs
SFP Slots
RS-232
Terminal Port
AC Power Connector
RPS Connector
10/100Base-TX Ports
LED Mode
Select Button
System
LEDs
10/100/1000Base-T Ports
AT-8550SP The AT-8550SP switch has 48 10/100Base-TX twisted pair ports with
RJ-45 connectors. The ports have a maximum operating distance of 100
meters (328 feet) using Category 3 or better 100 ohm twisted pair cable for
10Base-T operation and Category 5 or 5E 100 ohm twisted pair cable for
100Base-TX operation.
The switch also features two 10/100/1000Base-T twisted pair ports,
labelled Ports 49R and 50R. They have RJ-45 connectors, require
Category 5 or 5E 100 ohm twisted pair cable, and have a maximum
operating distance of 100 meters (328 feet).
There are also two slots for two Small Form-factor Pluggable (SFP)
transceivers. You can use the slots to add 1000Base-X fiber optic ports to
the switch. For a list of supported SFP transceivers, contact your Allied
Telesis sales representative or refer to the Allied Telesis web site:
www.alliedtelesis.com.
The twisted pair ports 49R and 50R change to a redundant status
when SFP transceivers are installed and establish links with their
end nodes. A link on an SFP port always takes precedence over that
of the corresponding 10/100/1000Base-T twisted pair port.
100-240VAC
Figure 5 shows the front and back panels of the AT-8550GB switch.
~
Figure 5. AT-8550SP Switch Front and Back Panels
RPS INPUT
21
Chapter 1: Overview
Note
Port Descriptions
This section provides information on the following port types found on the
AT-8500 Series switches:
“10/100Base-TX Twisted Pair Ports,” next
“10/100/1000Base-T Twisted Pair Ports” on page 24
“100Base-FX Fiber Optic Ports” on page 25
10/100Base-TX
Twisted Pair
Ports
This section applies to the AT-8524M, AT-8524POE, AT-8550GB, and
AT-8550SP switches.
Type of Connector
The 10/100Base-TX twisted pair ports feature 8-pin RJ-45 connectors.
Only four of the pins are used when a port is operating at 10 or 100 Mbps
Speed
The twisted pair ports are 10/100Base-TX compliant and are capable of
10 megabits per second (Mbps) or 100 Mbps speeds. You can set the port
speed manually or, because the ports are IEEE 802.3u Auto-Negotiation
compliant, you can let the switch set each port’s speed automatically. 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.
Auto-Negotiation is activated as the default on all twisted pair ports
on the switch. To deactivate Auto-Negotiation and set the speeds
manually, refer to the AT-S62 Management Software User’s Guides.
Duplex Mode
Each twisted pair port on the switch can operate in either half- or fullduplex mode. The twisted pair ports are IEEE 802.3u-compliant and will
Auto-Negotiate the duplex mode setting.
If desired, you can disable Auto-Negotiation on one or all of the switch
ports so that you can set the duplex mode manually through the switch’s
management software.
22
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
Note
Note
In order for a switch port to successfully Auto-Negotiate its duplex
mode with an end node, the end node should also be using AutoNegotiation. Otherwise, a duplex mode mismatch can occur. A
switch port using Auto-Negotiation will default to half-duplex if it
detects that the end node is not using Auto-Negotiation. This will
result in a mismatch if the end node is operating at a fixed duplex
mode of full-duplex.
To avoid this problem, when you connect an end node with a fixed
duplex mode of full-duplex to a switch port, you should use the
AT-S62 management software to disable Auto-Negotiation on the
port and set the port speed and duplex mode manually.
Maximum Distance
Each twisted pair port has a maximum operating distance of 100 meters
(328 feet).
Type of Cabling
For 10 Mbps operation, Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling is required. For 100 Mbps operation,
Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or unshielded
twisted pair cabling is required.
Auto-MDI/MDI-X
The twisted pair ports are auto-MDI/MDI-X. They automatically configure
themselves as either MDI or MDI-X, depending on the configuration of the
port on the end node. This feature allows you to use either straight-through
or crossover twisted pair cables to connect devices to the ports.
The auto-MDI/MDI-X feature on a port is available only when the
port is set to Auto-Negotiation. If you disable Auto-Negotiation and
set a port’s speed and duplex mode manually, the port defaults to
MDI-X. For instructions on configuring a port, refer to the AT-S62
Management Software User’s Guides.
Port Pinouts
For the port pinouts for the AT-8524M, AT-8550GB, and AT-8550SP
switches, refer to Table 12 on page 83. For the port pinouts for the
AT-8524POE switch, refer to Table 13 on page 83.
23
Chapter 1: Overview
Note
Note
10/100/
1000Base-T
Twisted Pair
Ports
This section applies to Port 49R and Port 50R on the AT-8550GB and
AT-8550SP switches.
Type of Connector
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.
Speed
The ports can operate at 10, 100, or 1000 Mbps. The speed is set
automatically through Auto-Negotiation or you can set the speed to 10 or
100 Mbps manually through the management software.
Ports 49R and 50R can operate at 1000 Mbps only when set to
Auto-Negotiation. You cannot manually set these ports to 1000
Mbps.
Duplex Mode
The ports can operate in either half- or full-duplex mode. The ports are
IEEE 802.3u compliant and will Auto-Negotiate the duplex mode. If
needed, Auto-Negotiation can be disabled so that you can set the duplex
mode manually through the management software.
In order for a 10/100/1000Base-T port to successfully AutoNegotiate its duplex mode with an end node, the end node should
also be using Auto-Negotiation. Otherwise, a duplex mode
mismatch can occur. A port, using Auto-Negotiation, will default to
half-duplex if it detects that the end node is not using AutoNegotiation. This will result in a mismatch if the end node is
operating at a fixed duplex mode of full-duplex.
To avoid this problem, when you connect an end node with a fixed
duplex mode of full-duplex to a 10/100/1000Base-T port, you should
use the AT-S62 management software to disable Auto-Negotiation
on the port and set the port speed and duplex mode manually.
Maximum Distance
The ports have a maximum operating distance of 100 meters (328 feet).
Type of Cable
24
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
Note
For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling. For 100 or 1000 Mbps operation, the ports
require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or
unshielded twisted pair cabling.
Auto-MDI/MDI-X
The ports are auto-MDI/MDI-X. They automatically configure themselves
as either MDI or MDI-X. This feature allows you to use a straight-through
twisted pair cable to connect any type of device to a port.
The auto-MDI/MDI-X feature on a 10/100/1000Base-T port is
functional only when the port is set to Auto-Negotiation. If you
disable Auto-Negotiation and set the port’s speed and duplex mode
manually, the port defaults to MDI-X. For instructions on configuring
a port, refer to the AT-S62 Management Software User’s Guides.
100Base-FX
Fiber Optic Ports
Port Pinouts
For the pinouts of these ports when operating at 10 or 100 Mbps, refer to
Table 12 on page 83. For port pinouts when the ports are operating at
1000 Mbps, refer to Table 14 on page 84.
This section applies to the AT-8516F/SC switch.
Type of Connector
The fiber optic ports on the AT-8516F/SC switch have dual SC connectors.
Speed
The fiber optic ports have a fixed operating speed of 100 megabits per
second (Mbps). The speed cannot be changed.
Duplex Mode
The fiber optic ports can operate in either half- or full-duplex mode. You
can set the duplex mode manually or allow the switch to set it
automatically through Auto-Negotiation.
Maximum Distance
Each fiber optic port has a maximum operating distance of two kilometers
(1.25 miles) when operating in full-duplex mode and 412 meters (1,360
feet) when operating in half-duplex mode.
25
Chapter 1: Overview
Note
Type of Cable
The fiber optic ports can use either 50/125 or 62.5/125 micron multimode
fiber optic cable.
Do not use single-mode fiber optic cable with these ports.
26
Power Over Ethernet
The following discussion applies only to the AT-8524POE switch.
The twisted pair ports on the AT-8524POE switch feature Power over
Ethernet (PoE). PoE is a mechanism for supplying power to network
devices over the same twisted pair cables used to carry network traffic.
This feature can simplify network installation and maintenance by allowing
you to use the switch as a central power source for other network devices.
A device that receives its power over an Ethernet cable is called a
powered device. Examples of such devices can be wireless access points,
IP telephones, web cams, and even other Ethernet switches. A powered
device connected to a port on the switch will receive both network traffic
and power over the same twisted pair cable.
There are several advantages that the PoE feature of the AT-8524POE
switch adds to the installation and maintenance of your network. First,
because the switch acts as the central power source for your powered
devices, adding an uninterruptible power source (UPS) to the switch
increases the protection not just to the switch itself from possible power
source problems but also to all of the powered devices connected to it.
This can increase the reliability of your network by minimizing the impact
to network operations from a power failure.
AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
PoE can also simplify the installation of your network. A frequent issue in
selecting a location for a network device is whether there is a power
source nearby. This often limits equipment placement or requires the
added cost and time of having additional electrical sources installed. With
PoE, you can install PoE-compatible network equipment wherever they
are needed without having to worry about whether they are near a power
source.
The switch automatically determines whether or not a device connected to
a port is a powered device. A powered device has a signature resistor or
signature capacitor that the switch can detect over the Ethernet cabling. If
the resistor or capacitor is present, the switch assumes that the device is a
powered device.
Power Budgeting The AT-8524POE Layer 2+ Fast Ethernet Switch provides a maximum of
15.4 W of power per port on all 24 ports for a total power consumption of
370 W, while at the same time furnishing standard 10/100 Mbps Ethernet
functionality.
The AT-8524POE smart power management functionality supports any
combination of Ethernet ports (1-24) that supply power for IEEE 802.3af
Class 0, 1, 2, or 3 powered devices up to a maximum of 370 watts, as
27
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