Page 1
FS750 Series
FAST ETHERNET WEB-SMART SWITCHES
AT-FS750/20
AT-FS750/28
AT-FS750/28PS
AT-FS750/52
Installation Guide
613-002095 Rev. B
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Copyright 2015 Allied Telesis, Inc.
All rights reserved. No part of this publication may be reproduced without prior written permission from 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.
Page 3
Electrical Safety and Emissions
Note
Note
Standards
This section contains the following:
“US Federal Communications Commission”
“Industry Canada”
“Emissions, Immunity and Electrical Safety Standards” on page 4
“Translated Safety Statements” on page 4
US Federal Communications Commission
Radiated Energy
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.
Modifications or changes not expressly approved of by the manufacturer or the FCC, can void
your right to operate this equipment.
Industry Canada
Radiated Energy
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.
3
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Emissions, Immunity and Electrical Safety Standards
Warning
Warning
RFI Emissions FCC Class A, EN55022 Class A, CISPR 22 Class A, VCCI Class A, C-TICK
In a domestic environment this product may cause radio interference in which case the user
may be required to take adequate measures. E70
EMC (Immunity) EN55024, EN61000-3-2, EN61000-3-3
Electrical Safety EN60950-1 (TUV), UL 60950-1 (
Laser Safety: EN60825 L7
CULUS
)
Translated Safety Statements
Important: The indicates that translations of the safety statement are available in the PDF
document “Translated Safety Statements” posted on the Allied Telesis website at
alliedtelesis.com/support.
4
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Contents
Symbol Conventions .................................................................................................................................... 8
Contacting Allied Telesis.............................................................................................................................. 9
Chapter 1: Overview ...................................................................................................................................... 11
Features..................................................................................................................................................... 12
Twisted-Pair Ports ............................................................................................................................... 12
SFP Slots............................................................................................................................................. 12
LEDs.................................................................................................................................................... 13
Installation Options .............................................................................................................................. 13
MAC Address Table ............................................................................................................................ 13
Switch Front Panels ................................................................................................................................... 14
AT-FS750/20 Model ............................................................................................................................ 14
AT-FS750/28 Model ............................................................................................................................ 14
AT-FS750/28PS Model........................................................................................................................ 14
AT-FS750/52 Model ............................................................................................................................ 15
Management Software ............................................................................................................................... 16
Twisted-Pair Ports...................................................................................................................................... 17
Combo Ports .............................................................................................................................................. 18
LEDs .......................................................................................................................................................... 19
Power LED .......................................................................................................................................... 19
10/100Base-T Port LEDs..................................................................................................................... 19
10/100/1000 Base-T Port LEDs........................................................................................................... 19
SFP LEDs............................................................................................................................................ 20
SYS LED (AT-FS750/28PS)................................................................................................................ 20
POE MAX LED (AT-FS750/28PS)....................................................................................................... 21
Port POE LED (AT-FS750/28PS)........................................................................................................ 21
Reset Button .............................................................................................................................................. 22
Power Supply ............................................................................................................................................. 23
Chapter 2: Installation ................................................................................................................................... 25
Reviewing Safety Precautions ................................................................................................................... 26
Selecting a Site for the Switch ................................................................................................................... 30
Cable Specifications................................................................................................................................... 31
Unpacking the Switch................................................................................................................................. 32
Installing the Switch on a Desktop or Table ............................................................................................... 33
Installing the Switch in an Equipment Rack ............................................................................................... 34
Installing the Switch on a Wall ................................................................................................................... 36
Installing SFP Transceivers ....................................................................................................................... 38
Cabling the Switch ..................................................................................................................................... 40
Powering On the Switch............................................................................................................................. 41
Chapter 3: Troubleshooting ......................................................................................................................... 43
Appendix A: Technical Specifications ........................................................................................................ 45
Physical Specifications............................................................................................................................... 45
Dimensions.....................................................................................................................
Weight ................................................................................................................................................. 45
..................... 45
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Contents
Environmental Specifications ..................................................................................................................... 46
Power Specifications ..................................................................................................................................46
Safety and Electromagnetic Emissions Certifications ................................................................................46
Connectors and Port Pinouts...................................................................................................................... 48
6
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Preface
This manual is the installation guide for the FS750 Series Fast Ethernet
switches. The switches included in this series are:
AT-FS750/20
AT-FS750/28
AT-FS750/28PS
AT-FS750/52
This preface includes the following sections:
“Symbol Conventions” on page 8
“Contacting Allied Telesis” on page 9
7
Page 8
Symbol Conventions
Note
Caution
Warning
Warning
This document uses the following conventions:
Notes provide additional information.
Cautions inform you that performing or omitting a specific action
may result in equipment damage or loss of data.
Warnings inform you that performing or omitting a specific action
may result in bodily injury.
Warnings inform you that an eye and skin hazard exists due to the
presence of a Class 1 laser device.
8
Page 9
Contacting Allied Telesis
If you need assistance with this product, you may contact Allied Telesis
technical support by going to the Support & Services section of the Allied
Telesis web site at alliedtelesis.com/support. You can find links for the
following services on this page:
24/7 Online Support — Enter our interactive support center to
search for answers to your product questions in our knowledge
database, check support tickets, learn about Return Merchandise
Authorizations (RMAs), and contact Allied Telesis technical
experts.
USA and EMEA phone support - Select the phone number that
best fits your location and customer type.
Hardware warranty information - Learn about Allied Telesis
warranties and register your product online.
Replacement Services — Submit an RMA request via our
interactive support center.
FS750 Series Fast Ethernet Switches Installation Guide
Documentation - View the most recent installation guides, user
guides, software release notes, white papers and data sheets for
your product.
Software Updates - Download the latest software releases for your
product.
For sales or corporate contact information, go to alliedtelesis.com/
purchase and select your region.
9
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10
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Chapter 1
Overview
This chapter provides descriptions of the AT-FS750/20, AT-FS750/28,
AT-FS750/28PS, and AT-FS750/52 switches and contains the following
sections:
“Features” on page 12
“Switch Front Panels” on page 14
“Management Software” on page 16
“Twisted-Pair Ports” on page 17
“Combo Ports” on page 18
“LEDs” on page 19
“Reset Button” on page 22
“Power Supply” on page 23
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Chapter 1: Overview
Note
Note
Features
Here are the hardware features of the FS750 Series Fast Ethernet
switches.
Twisted-Pair
Ports
The FS750 Series Fast Ethernet switcheses have 16, 24, or 48 10/100
Mbps ports and four 10/100/1000Mbps ports.
Here are the basic features of 10/100 Mbps ports and 10/100/1000Mbps
ports:
IEEE802.3 compliant for 10Base-T ports
IEEE802.3u compliant for 100Base-TX ports
IEEE802.3ab compliant for 1000Base-T ports
IEEE 802.3u Auto-Negotiation compliant on 10/100Mbps ports
Auto-MDI/MDIX on 10/100Mbps ports
100 meters (328 feet) maximum operating distance
IEEE 802.3x Flow Control in full-duplex operation
Back Pressure Flow Control in half-duplex operation
RJ-45 connectors
Two SFP slots for combo ports
SFP Slots The FS750 series switches support both 100Base-FX and
1000Base-SX/LX on the SFP slots.
The SFP slots are paired with twisted pair ports on the switch to form
combo ports. For more information, see “Combo Ports” on page 18.
You must purchase SFP transceivers separately. For a list of
supported transceivers, contact your Allied Telesis distributor or
reseller.
See the product data sheets for the specific ATI SFP modules
supported by the FS750 Series Fast Ethernet switches.
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LEDs The following lists the switch LEDs:
Note
Speed and link/activity LEDs for the 10/100Base-T ports
LEDs that indicate 10/100M or 1000M speed and link/activity for
the 10/100/1000Base-T ports
Power LED
SYS LED (available only for the AT-FS750/28PS model)
POE MAX LED (available only for the AT-FS750/28PS model)
Port POE LEDs (available only for the AT-FS750/28PS model)
FS750 Series Fast Ethernet Switches Installation Guide
Installation
Options
MAC Address
Table
The FS750 Series Fast Ethernet switches can be installed in the following
ways:
Rack mounted in a 19-inch equipment rack
Mounted on a desk or tabletop
Rack mounting hardware is included in the shipping package.
Here are the basic features of the MAC address table:
Storage capacity up to 8KB MAC address entries for the
AT-FS750/20, AT-FS750/28, AT-FS750/28PS switches
Storage capacity up to 16KB MAC address entries for the
AT-FS750/52 switch
Automatic learning and aging
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Chapter 1: Overview
10/100/1000Base-T
Twisted-Pair Ports
Port LEDs
SFP Slots
10/100Base-T
Twisted-Pair Ports
10/100Base-T
Twisted-Pair Ports
Port LEDs SFP Slots
10/100/1000Base-T
Twisted-Pair Ports
10/100Base-T
Twisted-Pair Ports
Port LEDs
SFP Slots
10/100/1000Base-T
Twisted-Pair Ports
Mode
LEDs
Switch Front Panels
This section shows the design of the front panel for each model.
AT-FS750/20
Model
AT-FS750/28
Model
Figure 1 illustrates the front panel of the AT-FS750/20 switch.
Figure 1. AT-FS750/20 Switch Front Panel
Figure 2 illustrates the front panel of the AT-FS750/28 switch.
AT-FS750/28PS
Model
14
Figure 2. AT-FS750/28 Switch Front Panel
Figure 3 illustrates the front panel of the AT-FS750/28PS switch.
Figure 3. AT-FS750/28PS Switch Front Panel
Page 15
FS750 Series Fast Ethernet Switches Installation Guide
AT-GS924M
10/100Base-T
Twisted-Pair Ports
SFP Slots
10/100/1000Base-T
Twisted-Pair Ports
Port LEDs
AT-FS750/52
Model
Figure 4 illustrates the front panel of the AT-FS750/52 switch.
Figure 4. AT-FS750/52 Switch Front Panel
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Chapter 1: Overview
Management Software
The FS750 Series Fast Ethernet switches are shipped with the WebSmart
management software pre-installed. The software provides a web-browser
interface for in-band, over-the-network management.
In the unlikely event that the management software becomes corrupted or
damaged on the switch, you can download the software from the Allied
Telesis corporate web site and reinstall it on the switch. For instructions on
how to install new management software, see the FS750 Series Fast
Ethernet Switches Web User’s Guide.
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Twisted-Pair Ports
Note
FS750 Series Fast Ethernet Switches Installation Guide
The AT-FS750/20, AT-FS750/28, AT-FS750/28PS, and AT-FS750/52
Fast Ethernet Switches feature 16, 24, 24, and 48 twisted-pair ports,
respectively. These ports are 10Base-T and 100Base-TX compliant. You
can set the port speeds and duplex modes either automatically with IEEE
802.3u Auto-Negotiation or manually with the WebSmart management
software.
The twisted-pair ports feature 8-pin RJ-45 connectors. For the port
pinouts, see “Connectors and Port Pinouts” on page 48.
The ports have a maximum operating distance of 100 m (328 feet). For 10
Mbps operation, the ports require Category 3 or better 100 ohm shielded
or unshielded twisted-pair cabling. For 100 Mbps operation, the ports
require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or
unshielded twisted-pair cabling.
The ports feature auto-MDI, which automatically configures the ports as
MDI or MDI-X. This feature allows you to use straight-through twisted-pair
cables, regardless of the wiring configurations of the ports on the end
nodes.
A switch port connected to an end node that is not using
Auto-Negotiation should not use Auto-Negotiation to set the speed
and duplex mode, because a duplex-mode mismatch may occur. In
this case, disable Auto-Negotiation and set the port’s speed and
duplex mode manually.
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Chapter 1: Overview
Combo Ports
The FS750 Series Fast Ethernet switches have two pairs of combo ports.
Each combo port consists of one 10/100/1000Base-T twisted-pair port and
one slot for an optional 100Base-FX or 1000Base-SX/LX SFP transceiver.
The twisted-pair ports are identified with the letter “R” for “Redundant” on
the front face plates of the units. The combo ports and SFP slots are listed
in Table 1.
Table 1. Combo Ports
Switch Twisted-Pair Port SFP Slot
19R 19
AT-FS750/20
20R 20
27R 27
AT-FS750/28
28R 28
25R 25
AT-FS750/28PS
26R 26
51R 51
AT-FS750/52
52R 52
The combo ports have the guidelines listed here:
Only one port in a pair, either the twisted-pair port or a
corresponding SFP module, can be active at a time.
The twisted-pair port is the active port when its SFP slot is empty,
or when an SFP module is installed, but has not established a link
to an end node.
The twisted-pair port automatically changes to the redundant
status mode when an SFP module establishes a link with an end
node.
A twisted-pair port automatically transitions back to the active
status when the link is lost on the SFP module.
In nearly all cases, a twisted-pair port and an SFP module share
the same configuration settings, including port settings, VLAN
assignments, access control lists, and spanning tree.
18
An exception to the shared settings is port speed. If you disable
Auto-Negotiation on a twisted-pair port and set the speed and
duplex mode manually, the speed reverts to Auto-Negotiation
when an SFP module establishes a link with an end node.
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LEDs
Note
Note
FS750 Series Fast Ethernet Switches Installation Guide
The FS750 Series Fast Ethernet switcheses are equipped with LEDs to
indicate the switch status.
Power LED Table 2 describes the power LED.
Table 2. Power LED
LED State Description
PWR Off The switch is not receiving power.
Green The input AC power is within the normal
operating range.
10/100Base-T
Port LEDs
Table 3 describes the Link/Activity and speed LEDs for the 10/100Base-T
ports.
To see the Link/Activity and speed status for the AT-FS750/28PS
model, you must select the L/A option by toggling the MODE button.
LED State Description
L/A Off The port has not established a link with a
Table 3. 10/100Base-T Port LEDs
network device.
Steady
Green
Blinking
Green
Steady
Amber
Blinking
Amber
The port has established a link to a network
device and can operate at 100 Mbps.
The port is transmitting or receiving network
packets and operating at 100 Mbps.
The port has established a link to a network
device and can operate at 10 Mbps.
The port is transmitting or receiving network
packets and operating at 10 Mbps.
10/100/1000
Base-T Port
LEDs
Table 4 describes the Link/Activity and speed LEDs for the
10/100/1000Base-T ports.
To see the Link/Activity and speed status for the AT-FS750/28PS
model, you must select the L/A option by toggling the MODE button.
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Chapter 1: Overview
Table 4. 10/100/1000Base-T Port LEDs
LED State Description
L/A Off The port has not established a link with a
network device.
Blinking
Green
Steady
Green
Blinking
Amber
Steady
Amber
The port is transmitting or receiving network
packets and operating at 1000 Mbps.
The port has established a link to a network
device and can operate at 1000 Mbps.
The port is transmitting or receiving network
packets and operating at 10 or 100 Mbps.
The port has established a link to a network
device and can operate at 10 or 100 Mbps.
SFP LEDs Table 5 describes the LEDs for SFP ports.
LED State Description
Table 5. SFP Port LEDs
SYS LED
(AT-FS750/28PS)
SFP per
Port
Off The port has not established a link with a
network device.
Steady
Green
Blinking
Green
Steady
Amber
Steady
Amber
The port has established a link to a network
device and can operate at 1000Mbps.
The port is transmitting or receiving network
packets and operating at 1000Mbps.
The port is transmitting or receiving network
packets and operating at 100Mbps.
The port is transmitting or receiving network
packets and operating at 100Mbps.
Table 6 describes the SYS LED. This LED is available only for the
AT-FS750/28PS switch.
Table 6. SYS LED
LED State Description
SYS Off The system is not receiving power.
20
Red The system is not ready for its operation.
Green The system is up and operating normally.
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FS750 Series Fast Ethernet Switches Installation Guide
Note
POE MAX LED
(AT-FS750/28PS)
Port POE LED
(AT-FS750/28PS)
Table 7 describes the POE MAX LED. This LED is available only for the
AT-FS750/28PS switch.
Table 7. POE MAX LED
LED State Description
POE MAX Off The switch has spare power for a new PD.
Red The total PoE output power for all ports on
the switch exceeds the maximum PoE power
that the switch can deliver.
Table 8 describes the PoE LEDs for ports. The PoE LEDs are available
only for the AT-FS750/28PS switch.
To see the port PoE status, you must select the POE option by
toggling the MODE button.
Table 8. Port POE LEDs
LED State Description
POE Off PoE power is not being supplied.
Green PoE power is being supplied to the PD
normally.
Amber The total PoE output power for this port
exceeds the maximum power budget for the
switch.
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Chapter 1: Overview
Caution
Reset Button
To reset your switch, press the RESET button on the front panel.
Pressing the reset button initiates a system reboot of the switch and
reloads the current configuration file.
The switch does not forward network traffic during the reset process.
E87
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Power Supply
Note
FS750 Series Fast Ethernet Switches Installation Guide
Each switch has an internal power supply with a single AC power supply
socket on the back panel. To power the switch on or off, connect or
disconnect the power cord provided with the switch. A power cord is
supplied with the switch.
For the power requirements, see the “Power Specifications” on
page 46.
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Chapter 1: Overview
24
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Chapter 2
Installation
This chapter contains the following sections:
“Reviewing Safety Precautions” on page 26
“Selecting a Site for the Switch” on page 30
“Cable Specifications” on page 31
“Unpacking the Switch” on page 32
“Installing the Switch on a Desktop or Table” on page 33
“Installing the Switch in an Equipment Rack” on page 34
“Installing the Switch on a Wall” on page 36
“Installing SFP Transceivers” on page 38
“Cabling the Switch” on page 40
“Powering On the Switch” on page 41
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Chapter 2: Installation
Note
Warning
Warning
Warning
Warning
Warning
Warning
Reviewing Safety Precautions
Please review the following safety precautions before you begin to install
the chassis or any of its components.
Important: The indicates that translations of the safety statement
are available in the PDF document “Translated Safety Statements”
posted on the Allied Telesis website at alliedtelesis.com/support.
Class 1 Laser product. L1
Do not stare into the laser beam. L2
Do not look directly at the fiber optic cable ends or inspect the cable
ends with an optical lens. L6
Laser Safety: EN60825. L7
To prevent electric shock, do not remove the cover. No
user-serviceable parts inside. This unit contains hazardous voltages
and should only be opened by a trained and qualified technician. To
avoid the possibility of electric shock, disconnect electric power to
the product before connecting or disconnecting the cables. E1
26
Do not work on equipment or cables during periods of lightning
activity. E2
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FS750 Series Fast Ethernet Switches Installation Guide
Warning
Warning
Note
Caution
Note
Note
Warning
Power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord. E3
Class I Equipment. This equipment must be earthed. The power
plug must be connected to a properly wired earth ground socket
outlet. An improperly wired socket outlet could place hazardous
voltages on accessible metal parts. E4
Pluggable Equipment. The socket outlet shall be installed near the
equipment and shall be easily accessible. E5
Air vents must not be blocked and must have free access to the
room ambient air for cooling. E6
All Countries: Install product in accordance with local and National
Electrical Codes. E8
Circuit Overloading: Consideration should be given to the
connection of the equipment to the supply circuit and the effect that
overloading of circuits might have on over current protection and
supply wiring. Appropriate consideration of equipment nameplate
ratings should be used when addressing this concern. E21
Mounting of the equipment in the rack should be such that a
hazardous condition is not created due to uneven mechanical
loading. E25
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Chapter 2: Installation
Note
Caution
Warning
Warning
Warning
Warning
Warning
If installed in a closed or multi-unit rack assembly, the operating
ambient temperature of the rack environment may be greater than
the room ambient temperature. Therefore, consideration should be
given to installing the equipment in an environment compatible with
the manufacturer’s maximum rated ambient temperature (Tmra).
E35
Installation of the equipment in a rack should be such that the
amount of air flow required for safe operation of the equipment is not
compromised. E36
Reliable earthing of rack-mounted equipment should be maintained.
Particular attention should be given to supply connections other than
direct connections to the branch circuits (e.g., use of power strips).
E37
When you remove an SFP module from this product, the case
o
temperature of the SFP may exceed 70
C (158o F). Exercise
caution when handling with unprotected hands. E43
Operating Temperature. This product is designed for a maximum
ambient temperature of 50 degrees C. E57
In a domestic environment this product may cause radio
interference in which case the user may be required to take
adequate measures. E84
An SFP transceiver can be damaged by static electricity. Be sure to
observe all standard electrostatic discharge (ESD) precautions,
such as wearing an antistatic wrist strap, to avoid damaging the
transceiver. E86
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FS750 Series Fast Ethernet Switches Installation Guide
Caution
The switch does not forward network traffic during the reset process.
E87
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Chapter 2: Installation
Selecting a Site for the Switch
Observe the following requirements when choosing a site for your switch:
If you plan to install the switch in an equipment rack, verify that the
rack is safely secured and will not tip over. Devices in a rack
should be installed starting at the bottom, with the heavier devices
near the bottom of the rack.
If you are installing the switch on a table, verify that the table is
level and secure.
The power outlet for the switch should be located near the unit and
should be easily accessible.
The site should provide for easy access to the ports on the front of
the switch. This will make it easier for you to connect and
disconnect cables, as well as view the switch’s LEDs.
Air flow around the unit and through its vents on the side and rear
should not be restricted so that the switch can maintain adequate
cooling.
Do not place objects on top of the switch.
Do not expose the switch to moisture or water.
Ensure that the site is a dust-free environment.
You should use dedicated power circuits or power conditioners to
supply reliable electrical power to the network devices.
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Cable Specifications
Note
Table 9 contains the cable specifications for the twisted-pair ports.
FS750 Series Fast Ethernet Switches Installation Guide
Table 9. Twisted-Pair Cabling and Distances
Speed Type of Cable
Maximum
Operating
Distance
10 Mbps Standard TIA/EIA 568-B-compliant
Category 3 or better shielded or
unshielded cabling with 100 ohm
impedance and a frequency of 16
MHz.
100 Mbps Standard TIA/EIA 568-A-compliant
Category 5 or TIA/EIA
568-B-compliant Enhanced Category
5 (Cat 5e) shielded or unshielded
cabling with 100 ohm impedance and
a frequency of 100 MHz.
1000 Mbps Standard TIA/EIA 568-A-compliant
Category 5 or TIA/EIA
568-B-compliant Enhanced Category
5 (Cat 5e) shielded or unshielded
cabling with 100 ohm impedance and
a frequency of 100 MHz.
The twisted-pair ports on the switch feature auto-MDI when
operating at 10, 100, or 1000 Mbps. A port is configured as MDI or
MDI-X when it is connected to an end node. Consequently, you can
use a straight-through twisted-pair cable when connecting any type
of network device to a port on the switch.
100 m (328 ft)
100 m (328 ft)
100 m (328 ft)
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Chapter 2: Installation
Note
Unpacking the Switch
To unpack the switch, perform the following procedure:
1. Remove all of the components from the shipping package.
2. Place the switch on a level, secure surface.
3. In addition to the switch, verify that the shipping container includes the
Store the packaging material in a safe location. You must use the
original shipping material if you need to return the unit to Allied
Telesis.
following items shown in Table 10.
Table 10. Packing List
Two equipment rack or
wall brackets
Eight bracket screws
Four wall screws
Four rubber feet
(for desktop installation)
One regional AC power
cord
AT-FS750/20 and
AT-FS750/28
AT-FS750/28PS and
AT-FS750/52
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Installing the Switch on a Desktop or Table
You may install the switches on a desktop or table, or in a standard
19-inch equipment rack. To install the switch in a rack, see “Installing the
Switch in an Equipment Rack” on page 34.
To place the switch on a desktop or table, perform the following procedure:
1. Remove all equipment from the package and store the packaging
material in a safe place.
2. Turn the switch over and place it on a table.
3. Attach the four rubber feet to the bottom of the switch as shown in
Figure 5.
FS750 Series Fast Ethernet Switches Installation Guide
Figure 5. Attaching the Rubber Feet
4. Place the switch on a flat, secure surface (such as a desk or table)
leaving ample space around the unit for ventilation.
5. Go to “Installing SFP Transceivers” on page 38 or “Cabling the Switch”
on page 40.
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Chapter 2: Installation
Installing the Switch in an Equipment Rack
To install the switch in a standard 19-inch equipment rack, perform the
following procedure:
1. If the rubber feet are attached to the bottom of the switch, remove
them using a flat-head screwdriver.
2. Attach the two rack mount brackets to the sides of the switch using the
bracket screws that come with the unit. See Figure 6.
34
Figure 6. Attaching the Rack-Mount Brackets to the Switch
Page 35
FS750 Series Fast Ethernet Switches Installation Guide
3. Mount the switch in a standard 19-inch equipment rack using four
equipment rack screws (not provided with the switch) as shown in
Figure 7.
Figure 7. Mounting the Switch in an Equipment Rack
4. Go to “Installing SFP Transceivers” on page 38 or “Cabling the Switch”
on page 40.
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Chapter 2: Installation
Installing the Switch on a Wall
To install the switch on a wall, perform the following procedure:
1. Turn the switch over and place it on a table.
2. If the rubber feet are attached to the bottom of the switch, remove
them using a flat-head screwdriver.
3. Orient the brackets against the sides of the switch as shown in Figure
8, and secure them to the unit with the eight brackets screws included
with the switch.
Figure 8. Attaching the Brackets to Install the Switch on a Wall
4. Have another person hold the switch at the wall location where the
switch is to be installed, while you use a pencil or pen to mark the wall
with the locations of the four holes in the brackets. The switch should
be oriented such that its front faceplate is facing up and is level to the
floor. See Figure 9 on page 36.
Figure 9. Marking the Screw Hole Locations
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FS750 Series Fast Ethernet Switches Installation Guide
5. Install the four plastic anchors included with the switch into the wall, at
the locations marked in the previous step. The anchors require 0.635
mm (0.25 in.) holes.
6. While another person holds the switch at the wall location, secure it to
the wall using the four wall mounting screws. See Figure 10 on page
37.
Figure 10. Securing the Switch to the Wall
7. Go to “Installing SFP Transceivers” on page 38 or “Cabling the Switch”
on page 40.
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Chapter 2: Installation
Note
Note
Warning
Installing SFP Transceivers
To install an SFP transceiver, perform the following procedure:
The transceiver can be hot-swapped; you do not need to power off
the switch to install a transceiver. However, you should always
remove the cables before removing the transceiver.
You should always install the transceiver before connecting the
fiber-optic cables to it.
1. Remove the transceiver from its shipping container and store the
packaging material in a safe location.
An SFP transceiver can be damaged by static electricity. Be sure to
observe all standard electrostatic discharge (ESD) precautions,
such as wearing an anti-static wrist strap, to avoid damaging the
transceiver. E86
2. Position the SFP transceiver with the label facing up.
3. Slide the transceiver into the SFP slot until it clicks into place. See
Figure 11.
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Figure 11. Inserting the SFP
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FS750 Series Fast Ethernet Switches Installation Guide
Caution
Note
SFP Transceiver
Handle
4. Verify that the handle on the transceiver is in the upright position, as
shown in Figure 12. This secures the transceiver and prevents it from
being dislodged from the slot.
Figure 12. SFP Handle in Upright Position
5. Repeat steps 2 through 5 to install an additional SFP transceiver.
When you remove an SFP module from this product, the case
temperature of the SFP may exceed 70 C (158 F). Exercise caution
when handling with unprotected hands. E43
Unnecessary removal and insertion of an SFP can lead to premature
failure.
For information on the cable specifications of the SFP, consult the
documentation shipped with the SFP.
6. Go to “Cabling the Switch” on page 40.
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Chapter 2: Installation
Cabling the Switch
Observe the following guidelines when connecting twisted-pair and
fiber-optic cables to the ports on the switch:
The connector on the cable should fit snugly into the port on the
switch. The tab on the connector should lock the connector into
place.
Because the twisted-pair ports have auto-MDI/MDI-X, you may use
straight-through twisted-pair cable to connect any type of network
device to the switch.
If your network topology contains a loop where two or more
network devices can communicate with each other over more than
one network path, do not connect the network cables that form the
loop until after you activate a spanning tree protocol on the switch.
Data loops can adversely affect network performance.
If you are creating a port trunk, do not connect the cables of the
trunk to the switch until after you have created the trunk in the
switch’s management software and the management software of
the switch at the other end of the trunk cables. Otherwise, a
network loop will result which can adversely affect network
performance.
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Powering On the Switch
Warning
Note
To power on the switch, perform the following procedure:
1. Plug the power cord into the AC power connector on the back of the
switch, as shown in Figure 13.
FS750 Series Fast Ethernet Switches Installation Guide
Figure 13. Plugging in the AC Power Cord
2. Plug the other end of the power cord into a wall outlet.
Power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord. E3
Pluggable Equipment. The socket outlet shall be installed near the
equipment and shall be easily accessible. E5
3. Verify that the POWER LED is green. If the LED is OFF, see Chapter
3, “Troubleshooting” on page 43.
4. If your switch is an AT-FS750/28PS model, verify the SYS LED is
green.
The switch is now powered on and ready for network operations. For
information on how to manage the switch, see the FS750 Series Web
Management User’s Guide.
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Chapter 2: Installation
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Chapter 3
Note
Troubleshooting
This chapter contains information on how to troubleshoot the switch if a
problem occurs.
For further assistance, please contact Allied Telesis Technical
Support at alliedtelesis.com/support.
Problem 1: The POWER LED on the front of the switch is off.
Solutions: The unit is not receiving power. Try the following:
Verify that the power cord is securely connected to the power
source and to the AC connector on the back panel of the switch.
Verify that the power outlet has power by connecting another
device to it.
Try connecting the unit to another power source.
Try a different power cord.
Verify that the voltage from the power source is within the required
levels for your region.
Problem 2: A twisted-pair port on the switch is connected to a network
device, but the port’s Link Activity LED is off.
Solutions: The port is unable to establish a link to a network device. Try
the following:
Verify that the network device connected to the twisted-pair port is
powered on and is operating properly.
Verify that the twisted-pair cable is securely connected to the port
on the switch channel and to the port on the remote network
device.
Verify that the port is connected to the correct twisted-pair cable.
This is to eliminate the possibility that the port is connected to the
wrong network device, such as a powered-off device.
Try connecting another network device to the twisted-pair port with
a different cable. If the twisted-pair port is able to establish a link,
then the problem is with the cable or the other network device.
Verify that the twisted-pair cable does not exceed 100 meters (328
feet).
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Chapter 3: Troubleshooting
Verify that you are using the appropriate category of twisted-pair
cable: Category 3 or better for 10 Mbps operation and Category 5
and Category 5E for 100 Mbps operation.
Problem 3: The Link Activity LED for an SFP transceiver is off.
Solutions: The fiber-optic port on the transceiver is unable to establish a
link to a network device. Try the following:
Verify that the network device connected to the fiber-optic port is
operating properly.
Verify that the fiber-optic cable is securely connected to the port on
the switch channel and to the port on the remote network device.
Check that the SFP module is fully inserted in the slot.
Verify that the operating specifications of the fiber-optic ports on
the SFP transceiver and the remote network device are
compatible.
Verify that the correct type of fiber-optic cabling is being used.
Verify that the port is connected to the correct fiber-optic cable.
This is to eliminate the possibility that the port is connected to the
wrong remote network device, such as a powered-off device.
Try connecting another network device to the fiber-optic port using
a different cable. If the port is able to establish a link, then the
problem is with the cable or with the other network device.
Use the switch’s management software to verify that the port is
enabled.
If the remote network device is a management device, use its
management firmware to determine whether its port is enabled.
Test the attenuation on the fiber-optic cable with a fiber-optic tester
to determine whether the optical signal is too weak (sensitivity) or
too strong (maximum input power).
Problem 4: Network performance between a twisted-pair port on the
switch and a network device is slow.
Solution: There might be a duplex-mode mismatch between the port and
the network device. This occurs when a twisted-pair port using AutoNegotiation is connected to a device with a fixed duplex mode of full
duplex. If this is the cause of the problem, adjust the duplex mode of the
port on the network device or on the switch so that both ports are using the
same duplex mode.
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Appendix A
Technical Specifications
This appendix contains the following specifications:
“Physical Specifications”
“Environmental Specifications” on page 46
“Power Specifications” on page 46
“Safety and Electromagnetic Emissions Certifications” on page 46
“Connectors and Port Pinouts” on page 48
Physical Specifications
Dimensions Table 11 shows the chassis dimensions per model.
Table 11. Chassis Dimensions
Model W x D x H mm (in)
AT-FS750/20 330 mm x 180 mm x 44 mm
(13 in x 7.1 in x 1.7 in)
AT-FS750/28 330 mm x 180 mm x 44 mm
(13 in x 7.1 in x 1.7 in)
AT-FS750/28PS
and AT-FS750/52
440 mm x 250 mm x 44 mm
(17.3 in x 9.8 in x 1.7 in)
Weight Table 12 shows the chassis weight per model.
Table 12. Chassis Weight
Model kg (lbs)
AT-FS750/20 1.4 kg (3.1 lbs)
AT-FS750/28 2.0 kg (4.4 lbs)
AT-FS750/28PS 3.2 kg (7.2 lbs)
AT-FS750/52 2.7 kg (6 lbs)
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Appendix A: Technical Specifications
Environmental Specifications
Table 13 shows the environmental specifications.
Operating Temperature 0° C to 40° C (32° F to 104° F)
Storage Temperature -20° C to 70° C (-4° F to 158° F)
Operating Humidity 5% to 90% non-condensing
Storage Humidity 5% to 95% non-condensing
Power Specifications
Table 14 shows the power specifications.
Table 13. Environmental Specifications
Table 14. Power Specifications
Rated input voltage 100 to 240 VAC
Raged input frequency 50/60 Hz
Rated input currency 0.7A
Safety and Electromagnetic Emissions Certifications
Table 15 shows the safety and electromagnetic emissions certifications.
Table 15. Safety and Electromagnetic Emissions Certifications
RFI Emissions FCC Part 15 Class A
CISPR 22 Class A
EN55022:2006/A:2007 Class A
Immunity EN55024
Electrical Safety UL60950-1 (cULus),
EN60950-1 (TUV),
RCM, CE Mark
46
Environmental Compliance EU-RoHS compliant, WEEE
China RoHS compliant
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FS750 Series Fast Ethernet Switches Installation Guide
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Appendix A: Technical Specifications
Connectors and Port Pinouts
This section lists the connectors and connector pinouts.
Figure 14 illustrates the pin layout for an RJ-45 connector and port.
Figure 14. RJ-45 Connector and Port Pin Layout
Table 16 lists the RJ-45 pin signals when a twisted-pair port is operating in
the MDI configuration.
Table 16. MDI Pin Signals (10Base-T or 100Base-TX)
Pin Signal
1TX+
2TX-
3RX+
6RX-
Table 17 lists the RJ-45 port pin signals when a twisted-pair port is
operating in the MDI-X configuration.
Table 17. MDI-X Pin Signals (10Base-T or 100Base-TX)
Pin Signal
1RX+
2RX-
3TX+
6TX-
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FS750 Series Fast Ethernet Switches Installation Guide
Table 18 lists the RJ-45 connector pins and their signals when a
1000Base-T port is operating at 1000 Mbps.
Table 18. RJ-45 1000Base-T Connector Pinouts
Pin Pair Signal
1 1 TX and RX+
2 1 TX and RX-
3 2 TX and RX+
4 3 TX and RX+
5 3 TX and RX-
6 2 TX and RX-
7 4 TX and RX+
8 4 TX and RX-
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Appendix A: Technical Specifications
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