Allied Telesis AT-GS980M-52 operation manual

GS980M Series

Gigabit Ethernet Switches

AlliedWare Plus™
AT-GS980M/52
AT-GS980M/52PS

Installation Guide

613-002638 Rev. B

Copyright  2019 Allied Telesis, Inc.

All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc.
Allied Telesis, VCStack, and the Allied Telesis logo are trademarks of Allied Telesis, Incorporated. 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

Laser Safety EN60825

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.

Warning: In a domestic environment this product may cause radio interference in which case
the user may be required to take adequate measures.

EMC EN 55024

EN 55032 Class A
EN 61000-3-2
EN 61000-3-3
FCC Part 15 (CFR 47) Class A
VCCI Class A
CISPR 22 Class A
ICES-003

Environmental Compliance RoHS

WEEE

Electrical Safety EN 60950-1 (second edition)

CAN/CSA-C22.2 No. 60950-1-07 (second edition)
UL 60950-1 (second edition)
cULus Mark
TUV-T-Mark

Regulatory Compliance RCM

CE

3

Translated Safety Statements

Important: Safety statements that have the  symbol are translated into multiple languages in the
Translated Safety Statements document at www.alliedtelesis.com/library.

Remarque: Les consignes de sécurité portant le symb ole  sont traduites dans plusieurs langues
dans le document Translated Safety Statements, disponible à l'adresse www.alliedtelesis.com/
library

4

Contents

Preface ...............................................................................................................................................................................11

Document Conventions .......................................................................................................................................................12

Contacting Allied Telesis .....................................................................................................................................................13

Chapter 1: Overview ........................................................................................................................................................ 15

Front and Rear Panels ........................................................................................................................................................16

Management Panel .............................................................................................................................................................18

Features ..............................................................................................................................................................................19

GS980M Models...........................................................................................................................................................19

10/100/1000Mbps Twisted Pair Ports ..........................................................................................................................19

100Mbps or 1Gbps SFP Transceiver Ports..................................................................................................................19

Power Over Ethernet....................................................................................................................................................20

LEDs.............................................................................................................................................................................20

Installation Options.......................................................................................................................................................20

Management Software and Interfaces .........................................................................................................................20

Console Port.................................................................................................................................................................20

USB Port ........................................................ ................................. ... ... ........................ ...............................................21

Management Methods..................................................................................................................................................21

Power Conservation.....................................................................................................................................................21

MAC Address Table ...................................................................... ...............................................................................21

10/100/1000Mbps Twisted Pair Ports..................................................................................................................................22

Connector Type.............................................. .................................... ..........................................................................22

Speed...........................................................................................................................................................................22

Duplex Mode................................................................................................................................................................22

Maximum Distance.......................................................................................................................................................22

Cable Requirements.....................................................................................................................................................22

Automatic MDIX Detection ...........................................................................................................................................23

LEDs.............................................................................................................................................................................23

Power Over Ethernet on the AT-GS980M/52PS Switch......................................................................................................26

PoE Standards.............................................................................................................................................................26

Powered Device Classes .............................................................................................................................................26

Power Budget...............................................................................................................................................................27

Port Priorities................................................................................................................................................................27

Wiring Implementation..................................................................................................................................................28

SFP Transceiver Ports.........................................................................................................................................................29

SFP Transceivers.........................................................................................................................................................29

LEDs.............................................................................................................................................................................29

Fault and Power LEDs.........................................................................................................................................................31

eco-friendly Button...............................................................................................................................................................32

USB Port..............................................................................................................................................................................33

USB Port LED ................................................................................................................... ...........................................33

Console Port........................................................................................................................................................................34

Power Supply and Fan ........................................................................................................................................................35

Specifying Ports in the Command Line Interface.................................................................................................................36

Chapter 2: Beginning the Installation ............................................................................................................................37

Reviewing Safety Precautions.............................................................................................................................................38

Installation Options..............................................................................................................................................................42

Choosing a Site for the Switch ............................................................................................................................................43

Unpacking the Switch..........................................................................................................................................................44

5

Contents

Chapter 3: Installing the Switch on a Table or Desktop ...............................................................................................47

Chapter 4: Installing the Switch in an Equipment Rack ...............................................................................................51

Beginning the Installation.................................................................................................................................................... 52

Required Items..................................................................................................... ....................................................... 52

Switch Orientations in the Equipment Rack.................................................................................................................52

Removing the Bumper Feet................................................................................................................................................ 54

Installing the Switch............................................................................................................................................................55

Chapter 5: Installing the Switch on a Wall .....................................................................................................................57

Switch Orientations on a Wall............................................................................................................................................. 58

Installation Guidelines......................................................................................................................................................... 59

Tools and Material.......................................................................................................................................................59

Plywood Base.....................................................................................................................................................................61

Installing a Plywood Base................................................................................................................................................... 63

Installing the Switch on a Plywood Base ............................................................................................................................ 64

Installing the Switch on a Concrete Wall............................................................................................................................. 66

Chapter 6: Cabling the Networking Por ts an d Powering On the Switch ....................................................................69

Cabling Twisted Pair Ports..................................................................................................................................................70

Guidelines to Handling SFP Transceivers.......................................................................................................................... 71

Installing SFP Transceivers................................................................................................................................................ 72

Powering On the Switch......................................................................................................................................................76

Starting a Local Management Session............................................................................................................................... 79

Verifying the Switch with AlliedWare Plus Commands....................................................................................................... 81

Chapter 7: Troubleshooting

Appendix A: Technical Specifications ...........................................................................................................................87

Physical Specifications .......................................................................................................................................................88

Environmental Specifications.............................................................................................................................................. 89

Power Specifications........................................................................................................................................................... 90

Certificates.......................................................................................................................................................................... 91

RJ-45 Twisted Pair Port Pinouts......................................................................................................................................... 92

RJ-45 Style Serial Console Port Pinouts............................................................................................................................ 94

............................................................................................................................................83

6

Figures

Figure 1: Front Panels of the GS980M Series Switches......................................................................................................16

Figure 2: Back Panels ..........................................................................................................................................................17

Figure 3: Management Panel ...............................................................................................................................................18

Figure 4: LEDs for the Twisted Pair Ports on the AT-GS980M/52 Switch............................................................................23

Figure 5: LEDs for the Twisted Pair Ports on the AT-GS980M/52PS Switch.......................................................................24

Figure 6: SFP Transceiver Port LEDs..................................................................................................................................29

Figure 7: Fault and Power LEDs...........................................................................................................................................31

Figure 8: eco-friendly Button ................................................................................................................................................32

Figure 9: USB Port and LED ................................................................................................................................................33

Figure 10: PORT Parameter in the Command Line Interface...............................................................................................36

Figure 11: Installation Options..............................................................................................................................................42

Figure 12: GS980M Switch Shipping Box.............................................................................................................................44

Figure 13: Accessory Kit Items.............................................................................................................................................45

Figure 14: Parts of the Bumper Feet....................................................................................................................................47

Figure 15: Inset the Rivet Housing into the Bumper Foot.....................................................................................................48

Figure 16: Place the Bumper Foot on a Base Corner Hole..................................................................................................48

Figure 17: Inserting the Rivet into the Bumper Foot.............................................................................................................49

Figure 18: Bracket Holes on the Switch................................................................................................................................52

Figure 19: GS980M Switch Orientations in an Equipment Rack.......................................................................................... 53

Figure 20: Removing the Bumper Feet.................................................................................................................................54

Figure 21: Example of Attaching the Brackets to the Switch................................................................................................55

Figure 22: Installing the Switch in an Equipment Rack.........................................................................................................56

Figure 23: Positioning the Switch on a Wall .........................................................................................................................58

Figure 24: Switch on a Wall with a Plywood Base................................................................................................................61

Figure 25: Steps to Installing the Switch with a Plywood Base ............................................................................................62

Figure 26: Bracket Positions for Installing Switch on a Wall.................................................................................................64

Figure 27: Securing the Switch to the Plywood Base.............................................................................

Figure 28: Marking the Locations of the Bracket Holes on a Concrete Wall ................................................... .....................67

Figure 29: Installing the Switch on a Concrete Wall.............................................................................................................68

Figure 30: Removing the Dust Plug from an SFP Port.........................................................................................................72

Figure 31: Installing an SFP Transceiver..............................................................................................................................73

Figure 32: Removing the Dust Cover from an SFP Transceiver ..........................................................................................74

Figure 33: Positioning the SFP Handle in the Upright Position ............................................................................................74

Figure 34: Connecting a Fiber Optic Cable to an SFP Transceiver......................................................................................75

Figure 35: Installing the Power Cord Retaining Clip.............................................................................................................76

Figure 36: Connecting the AC Power Cord ..........................................................................................................................77

Figure 37: Lowering the Power Cord Retaining Clip.............................................................................................................77

Figure 38: Connecting the Power Cord to an AC Power Source..........................................................................................78

Figure 39: Connecting the Management Cable to the Console RS-232 Port....................................................... ................79

Figure 40: User Exec Mode Prompt.....................................................................................................................................80

Figure 41: Pin Layout for the RJ-45 Twisted Pair Ports (Front View)...................................................................................92

..............................65

7

Figures

8

Tables

Table 1: Basic Features .......................................................................................................................................................19

Table 2: LEDS for the Twisted Pair Ports on the AT-GS980M/52 Switch ...........................................................................23

Table 3: LEDs for the Twisted Pair Ports on the AT-GS980M/52PS Switch .......................................................................25

Table 4: IEEE Powered Device Classes ..............................................................................................................................26

Table 5: LEDS for the SFP Transceiver Ports .....................................................................................................................29

Table 6: Fault and Power LEDS ..........................................................................................................................................31

Table 7: USB LED ...............................................................................................................................................................33

Table 8: PORT Parameter Format .......................................................................................................................................36

Table 9: Product Dimensions ...............................................................................................................................................88

Table 10: Product Weights ..................................................................................................................................................88

Table 11: Ventilation Requirements .....................................................................................................................................88

Table 12: Environmental Specifications ...............................................................................................................................89

Table 13: Maximum Power Consumptions ..........................................................................................................................90

Table 14: Input Voltages ......................................................................................................................................................90

Table 15: Heat Dissipations .................................................................................................................................................90

Table 16: Product Certificates .............................................................................................................................................91

Table 17: Pin Signals on the RJ-45 Twisted Pair Ports at 10 or 100Mbps ....... .................................... ..............................92

Table 18: Pin Signals on the RJ-45 Twisted Pair Ports at 1Gbps ....................................................................................... 92

Table 19: Pin Signals of the RJ-45 Style Serial Console Port .............................................................................................94

9

Tables

10

Preface

This guide contains the installation instructions for the GS980M Series of
Gigabit Ethernet switches. This preface contains the following sections:

 “Document Conventions” on page 12
 “Contacting Allied Telesis” on page 13

11

Preface

Note

Caution

Warning

Document Conventions

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.

12

Contacting Allied Telesis

If you need assistance with this product, you can contact Allied Telesis
technical support by going to the Support & Services section of the Allied
Telesis web site at www.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, to check support tickets, to learn about RMAs, and to
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 a Return Merchandise

Authorization (RMA) request via our interactive support center.

GS980M Series Installation Guide

 Documentation — View the most recent installation and user

guides, software release notes, white papers, and data sheets for
your products.

 Software Downloads — Download the latest software releases for

your managed products.

For sales or corporate information, go to www.alliedtelesis.com/contact
and select your region.

13

Preface

14

Chapter 1

Overview

This chapter contains the following sections:

 “Front and Rear Panels” on page 16
 “Management Panel” on page 18
 “Features” on page 19
 “10/100/1000Mbps Twisted Pair Ports” on page 22
 “Power Over Ethernet on the AT-GS980M/52PS Switch” on page 26
 “SFP Transceiver Ports” on page 29
 “Fault and Power LEDs” on page 31
 “eco-friendly Button” on page 32
 “USB Port” on page 33
 “Console Port” on page 34
 “Power Supply and Fan” on page 35
 “Specifying Ports in the Command Line Interface” on page 36

15

Chapter 1: Overview

AT-GS980M/52PS Switch

48 10/100/1000Mbps Twisted

Pair Ports

Management

Panel

AT-GS980M/52 Switch

Four 100Mbps or

1Gbps SFP

Transceiver Ports

48 10/100/1000Mbps Twisted

Pair Ports with PoE and PoE+

Management

Panel

Four 100Mbps or

1Gbps SFP

Transceiver Ports

Front and Rear Panels

The front panels of the GS980M Gigabit Ethernet Switches are shown in
Figure 1.

16

Figure 1. Front Panels of the GS980M Series Switches

The rear panels are shown in Figure 2 on page 17.

GS980M Series Installation Guide

AC Power

Supply Connector

AT-GS980M/52PS Switch

AT-GS980M/52 Switch

AC Power

Supply Connector

Figure 2. Back Panels

17

Chapter 1: Overview

USB Port

eco-friendly

Button

Console Management

Port

System LEDs

Management Panel

Figure 3 identifies the components on the management panel.

Figure 3. Management Panel

18

Features

The following sections review the hardware features of the Gigabit
Ethernet switches in the GS980M Series.

GS980M Models Table 1 lists the basic features.

Table 1. Basic Features

GS980M Series Installation Guide

10/100/1000

Model

AT-GS980M/52 48 4 No ­AT-GS980M/52PS 48 4 Yes 740W

10/100/1000Mbps

Twisted Pair

Ports

Mbps Twisted

Pair Ports

The switches come with one pre-installed power supply. It is not field­replaceable.

The forty eight twisted pair ports on the AT-GS980M/52 and AT-GS980M/
52PS Switches have these features:

 10/100/1000Mbps operation
 100 meters (328 feet) maximum operating distance per port
 Half or full-duplex mode
 Auto-Negotiation for speed and duplex mode
 Port Link/Activity (L/A) LEDs
 Automatic MDIX detection at 10 or 100Mbps.

100Mbps or
1Gbps SFP

Transceiver

Ports

PoE and PoE+

PoE Power

Budget

100Mbps or

1Gbps SFP

Transceiver Ports

The SFP transceiver ports support the following types of transceivers:

 100Mbps (100Base-FX) or 1Gbps (1000SX/LX) single-mode or

multi-mode fiber optic transceivers

 Single-port, BiDi fiber optic transceivers
 AT-SPTX 1Gbps (1000Base-TX) transceiver with RJ-45 connector

for twisted pair cable

SFP transceivers must be purchased separately. For a list of supported
transceivers, refer to the product data sheet on the Allied Telesis web site.

19

Chapter 1: Overview

Power Over

Ethernet

LEDs Here are the port LEDs:

Here are the basic features of PoE and PoE+ on the twisted pair ports on
the AT-GS980M/52PS Switch:

 Supported on all forty eight twisted pair ports
 Supports PoE (15.4 watts maximum) and PoE+ (30 watts

maximum) powered devices

 740W power budget
 Supports powered device classes 0 to 4
 Mode A wiring
 IEEE802.3af and IEEE802.3at compliant

 The SFP transceiver ports have link/activity LEDs.
 The twisted pair ports on the AT-GS980M/52 Switch have speed/

activity and duplex mode LEDs.

 The twisted pair ports on the AT-GS980M/52PS Switch have

speed/activity and PoE status LEDs.

 The management panel has system LEDs for the power supply

and USB slot.

You can use the eco-friendly button to turn off the LEDs to conserve
electricity.

Installation

Options

Management

Software and

Interfaces

Here are the installation options:

 Desk or tabletop
 Standard 19-inch equipment rack
 Wood or concrete wall

Here are the management software and interfaces:

 AlliedWare Plus Management Software
 Command line interface
 Web browser interface

Console Port The port is used for local management of the switch. A management cable

is provided with the device. The port settings are provided in “Console
Port” on page 34.

20

USB Port Here are the features and functions of the USB port:

 USB 2.0 compatible
 Store switch configuration files on flash drives.
 Restore configuration files from flash drive to switches whose

settings have been lost or corrupted, or to configure replacement
units.

 Update the AlliedWare Plus Management Software.

GS980M Series Installation Guide

Management

Methods

Power

Conservation

MAC Address

Table

Here are the methods for managing the switches:

 Local management through the Console port
 Remote Telnet or Secure Shell management
 Remote HTTP or HTTPS web browser management
 SNMPv1, v2c, and v3

The switches have the following power conservation features:

 eco-friendly button for turning off the Ethernet port LEDs to

conserve electricity.

 High efficiency power supply

Here are the basic features of the MAC address table:

 Storage capacity of 16K MAC address entries
 Automatic learning and aging

21

Chapter 1: Overview

Note

Note

10/100/1000Mbps Twisted Pair Ports

The following sections describe the twisted pair ports on the AT-GS980M/
52 and AT-GS980M/52PS Switches.

Connector Type The twisted pair ports have 8-pin RJ-45 connectors. The ports use four

pins at 10 or 100Mbps and all eight pins at 1000Mbps. The pin
assignments are listed in “RJ-45 Twisted Pair Port Pinouts” on page 92.

Speed The ports can operate at 10, 100, or 1000Mbps. The switch can set the

speeds automatically through Auto-Negotiation, the default setting, or you
can manually configure them with the AlliedWare Plus Operating System.

Twisted-pair ports have to be set to Auto-Negotiation to operate at
1000Mbps.

Duplex Mode The twisted-pair ports on the switches can operate in either half- or full-

duplex mode at 10 or 100Mbps. Ports operating at 1000Mbps can only
operate in full-duplex mode. The twisted-pair ports are IEEE 802.3u­compliant and use Auto-Negotiate to set the duplex mode setting.

You can disable Auto-Negotiation on the ports and set the duplex mode
manually.

Switch ports that are connected to 10 or 100Mbps end nodes that
are not using Auto-Negotiation should not use Auto-Negotiation to
set their speed and duplex mode settings, because duplex mode
mismatches might occur. You should disable Auto-Negotiation and
set the speed and duplex mode settings manually with the
AlliedWare Plus Management Software.

Maximum

The ports have a maximum operating distance of 100 meters (328 feet).

Distance

Cable

Requirements

The minimum cable requirements for the ports are listed here.

 10Mbps or 100Mbps: Standard TIA/EIA 568-B-compliant Category

3 shielded or unshielded cabling.

 1000Mbps: Standard TIA/EIA 568-A-compliant Category 5 or TIA/

EIA 568-B-compliant Enhanced Category 5 (Cat 5e) shielded or
unshielded cabling.

22

GS980M Series Installation Guide

Speed/Activity

Duplex Mode

Speed/Activity

Duplex Mode

Automatic MDIX

Detection

LEDs The twisted pair ports on the AT-GS980M/52 Switch have two LEDs. The

The 10/100/1000Mbps twisted-pair ports are IEEE 802.3ab compliant.
They feature automatic MDIX detection when operating at 10 or 100Mbps.
(Automatic MDIX detection does not apply to 1000Mbps.) The switch
automatically configures the ports to MDI or MDI-X depending on the
wiring configurations of the end nodes.

Ports connected to network devices that do not support automatic MDIX
detection default to MDIX.

You can disable automatic MDIX detection on the individual ports and
configure the MDI/MDI-X settings manually with the POLARITY command.

Refer to Table 18 on page 92 for the port pinouts of the twisted pair ports.

LEDs are shown in Figure 4.

Figure 4. LEDs for the Twisted Pair Ports on the AT-GS980M/52 Switch

The states of the port LEDs are described in Table 2.

Table 2. LEDS for the Twisted Pair Ports on the AT-GS980M/52 Switch

State Description

Speed/Activity LED
Solid Green The port has established a 1Gbps link to a

Flashing Green The port is transmitting or receiving

Solid Amber The port has established a 10 or 100Mbps

network device.

packets at 1Gbps.

link to a network device.

23

Chapter 1: Overview

Speed/Activity

PoE

Speed/Activity

PoE

Table 2. LEDS for the Twisted Pair Ports on the AT-GS980M/52 Switch

State Description

Flashing Amber The port is transmitting or receiving

packets at 10 or 100Mbps.

Off Possible causes of this state are listed

here:

- The port has not established a link with
another network device.

- The LEDs are turned off. To turn on the

LEDs, use the eco-friendly button.
Duplex Mode LED
Solid Green The port is operating in full-duplex mode.
Solid Amber The port is operating in half-duplex mode.
Flashing Amber The port is encountering collisions in half-

duplex mode.

The twisted pair ports on the AT-GS980M/52PS Switch have two LEDs.
The LEDs are shown in Figure 5.

Figure 5. LEDs for the Twisted Pair Ports on the AT-GS980M/52PS

Switch

24

The states of the port LEDs are described in Table 3 on page 25.

GS980M Series Installation Guide

Table 3. LEDs for the Twisted Pair Ports on the AT-GS980M/52PS Switch

State Description

Speed/Activity LED
Solid Green The port has established a 1Gbps link to a

network device.

Flashing Green The port is transmitting or receiving

packets at 1Gbps.

Solid Amber The port has established a 10 or 100Mbps

link to a network device.

Flashing Amber The port is transmitting or receiving

packets at 10 or 100Mbps.

Off Possible causes of this state are listed

here:

- The port has not established a link with
another network device.

- The LEDs are turned off. To turn on the

LEDs, use the eco-friendly button.
PoE LED
Solid Green The port is delivering power to a powered

device.
Solid Amber The switch has shut down PoE on the port

because of a fault condition.
Flashing Amber The switch has detected a powered device

on the port but cannot supply power to it

because it is already providing its

maximum power to other devices. The

maximum power budget for the switch is

740W.
Off This LED state can result from the

following conditions:

- The port is not connected to a powered

device or the device is powered off.

- The port is disabled in the management

software.

- PoE is disabled on the port.

- The LEDs are turned off. To turn on the

LEDs, use the eco-friendly button.

25

Chapter 1: Overview

Power Over Ethernet on the AT-GS980M/52PS Switch

The AT-GS980M/52PS Switch features PoE on all forty eight 10/100/
1000Mbps ports. With PoE, the switch can supply DC power to network
devices over the same twisted pair cables that carry the network traffic.

PoE can make it easier to install networks. The selection of a location for a
network device is often limited by whether there is a power source nearby.
This often limits equipment placement or requires the added time and cost
of having additional electrical sources installed. But with PoE, you can
install PoE-compatible devices wherever they are needed without having
to worry about whether there are power sources nearby.

A device such as the AT-GS980M/52PS Switch that provides PoE to
network devices is referred to as power sourcing equipment (PSE). It
functions as a central power source for other network devices.

Devices that receive their power from a PSE are called powered devices
(PD). Examples include wireless access points, IP telephones, webcams,
and even other Ethernet switches.

The switch automatically determines whether or not devices connected to
its ports are powered devices. Ports that are connected to network nodes
that are not powered devices (that is, devices that receive their power from
another power source) function as regular Ethernet ports, without PoE.
The PoE feature remains activated on the ports but no power is delivered
to the devices.

PoE Standards The AT-GS980M/52PS Switch supports these PoE standards:

 PoE (IEEE 802.3af): This standard provides up to 15.4 watts at the

switch port for powered devices that require up to 12.95 watts.

 PoE+ (IEEE 802.3at): This standard provides up to 30.0 watts at

the switch port for powered devices that require up to 25.5 watts.

Powered Device

Classes

Powered devices are grouped into the five classes listed in Table 4 on
page 26. The classes are based on the amount of power the devices
require. The switches support all five classes.

Table 4. IEEE Powered Device Classes

Maximum Power

Class

Output from a Switch

Port

PD Power Range

26

0 15.4W 0.44W to 12.95W
1 4.0W 0.44W to 3.84W

GS980M Series Installation Guide

Table 4. IEEE Powered Device Classes (Continued)

Maximum Power

Class

Output from a Switch

PD Power Range

Port

2 7.0W 3.84W to 6.49W
3 15.4W 6.49W to 12.95W
4 30.0W 12.95W to 25.5W

Power Budget The AT-GS980M/52PS Switch has a DC power budget of 740W. This is

the total maximum amount of power that the switch can supply to the
powered devices on its twisted pair ports.

To determine the maximum number of PoE devices the switch can support
at one time, compare their power requirements against its power budget.
The switch can supply power to all devices provided their total power
requirement is less than its power budget. If the total power requirement of
the devices exceed the power budget, the switch will deny power to one or
more ports using port priorities.

The switch can handle different power requirements on different ports.
This enables you to connect different classes of PoE equipment to the
ports on the switch.

Port Priorities If the switch determines that the power requirements of the powered

devices exceed its power budget, it will deny power to some ports based
on a system called port priorities. You can use this mechanism to ensure
that powered devices critical to the operations of your network are given
preferential treatment by the switch in the distribution of power should the
demands of the devices exceed the available capacity.

There are three priority levels:

 Critical
 High
 Low

Ports set to the Critical level, the highest priority level, are guaranteed
power before any of the ports assigned to the other two priority levels.
Ports assigned to the other priority levels receive power only if all the
Critical ports are receiving power. Ports that are connected to your most
critical powered devices should be assigned to this level. If there is not
enough power to support all the ports set to the Critical priority level, power
is provided to the ports based on port number, in ascending order.

The High level is the second highest level. Ports set to this level receive

27

Chapter 1: Overview

power only if all the ports set to the Critical level are already receiving
power. If there is not enough power to support all of the ports set to the
High priority level, power is provided to the ports based on port number, in
ascending order.

The lowest priority level is Low. This is the default setting. Ports set to this
level only receive power if all of the ports assigned to the other two levels
are already receiving power. As with the other levels, if there is not enough
power to support all of the ports set to the Low priority level, power is
provided to the ports based on port number, in ascending order.

Power allocation is dynamic. Ports supplying power to powered devices
may cease power transmission if the switch’s power budget is at
maximum usage and new powered devices, connected to ports with
higher priorities, become active.

Wiring

Implementation

The IEEE 802.3af standard defines two methods for delivering DC power
over twisted pair cable by a switch to powered devices. These methods
are known as Modes A and B. They identify the individual wires that carry
the DC power within the network cables from the switch to powered
devices.

Twisted pair cabling typically consists of eight wires. With 10Base-T and
100Base-TX devices, the wires connected to pins 1, 2, 3, and 6 on the RJ­45 connectors carry the network traffic while the wires connected to pins 4,
5, 7, and 8 are unused. With 1000Base-T devices, all eight wires are used
to carry network data.

It takes four wires to deliver DC power to a powered device. With Mode A,
power is delivered on pins 1, 2, 3, and 6. These are the same pins in
10Base-T and 100Base-TX devices that carry the network data. With
Mode B, power is provided over the spare wires.

The ports on the AT-GS980M/52PS Switch deliver power using Mode A.
Powered devices that comply with the IEEE 802.3af standard are required

to support both Modes A and B. Legacy devices that do not comply with
the standard will work with the switch if they are powered on pins 1, 2, 3,
and 6.

28

GS980M Series Installation Guide

LED for Bottom
SPF Port

LED for Top

SPF Port

SFP Transceiver Ports

The switches have four SFP transceiver ports.

SFP Transceivers The transceiver ports support 100Mbps and 1Gbps SX/LX SFP

transceivers

 100Mbps or 1000Base single-mode or multi-mode fiber optic

transceivers

 100Mbps or 1000Mbps bi-directional (BiDi) fiber optic transceivers
 1000Base-TX transceivers with RJ-45 connectors for twisted pair

cable

SFP transceivers are purchased separately. For a list of supported
transceivers, refer to the product data sheet on the Allied Telesis web site.

LEDs Each transceiver port has one LED. Refer to Figure 6.

Figure 6. SFP Transceiver Port LEDs

The LED states are described in Table 5.

Table 5. LEDS for the SFP Transceiver Ports

State Description

Solid green The port has established a 1Gbps link to a

network device.
Flashing green The port is transmitting or receiving

packets at 1Gbps.
Solid amber The port has established a 100Mbps link

to a network device.
Flashing amber The port is transmitting or receiving

packets at 100Mbps.

29

Chapter 1: Overview

Table 5. LEDS for the SFP Transceiver Ports (Continued)

State Description

Off Possible causes of this state are listed

here:

- The SFP transceiver port is empty.

- The SFP transceiver has not
established a link with another network
device.

- The LEDs are turned off. To turn on the
LEDs, use the eco-friendly button.

30

Fault and Power LEDs

Note

Fault and Power LEDs

The Fault and Power LEDs are shown in Figure 7.

GS980M Series Installation Guide

The USB LED is described in “USB Port” on page 33.

The states of the LEDs are described in Table 6.

Fault LED
Off The switch is operating normally or is not

Flashing Amber The power supply or switch is

Power LED
Solid Green The power supply and switch are

Figure 7. Fault and Power LEDs

Table 6. Fault and Power LEDS

State Description

powered on.

experiencing a problem, such as
overheating. To troubleshoot the problem,
view the log messages by displaying the
system log file.

operating normally.

Off The switch is powered off or the input

power is outside the normal operating
range.

31

Chapter 1: Overview

Note

eco-friendly

Button

eco-friendly Button

The eco-friendly button on the front panel of the switch is used to toggle
the port LEDs on or off. Refer to Figure 8. You can turn off the LEDs to
conserve electricity when you are not using them to monitor the device.
You can also toggle the LEDs with the ECOFRIENDLY LED and NO
ECOFRIENDLY LED commands in the Global Configuration mode of the
command line interface of the AlliedWare Plus management software.

Figure 8. eco-friendly Button

The switch is operating in a low power mode when the LEDs are turned
off. The low power mode does not interfere with the network operations o f
the device.

The management software on the switch has a command that blinks the
LEDs so that you can quickly and easily identify a specific unit among the
devices in an equipment rack. It is the FINDME command. The command
works even when the switch is operating in the low power mode, with the
port LEDs turned off.

Before checking or troubleshooting network connections to ports on
the switch, you should always check to be sure that the LEDs are on
by either pressing the eco-friendly button or issuing the
ECOFRIENDLY LED and NO ECOFRIENDLY LED commands in
the Global Configuration mode in the command line interface.

32

USB Port

USB Port LED

USB Port

You can use the USB port on the management panel for the following
functions:

 Store configuration files on flash drives.
 Restore configuration files to switches whose settings have been

lost or corrupted.

 Configure replacement units by downloading configuration files

from a flash drive.

 Update the AlliedWare Plus management software.

The port is USB2.0 compatible.

USB Port LED The USB port has one LED, shown in Figure 9.

GS980M Series Installation Guide

Figure 9. USB Port and LED

The states of the LEDs are described in Table 2.

Table 7. USB LED

State Description

Off The USB slot is empty.
Solid green A USB drive is inserted in the slot.
Flashing green The switch is writing data to or reading

data from the USB drive.

Flashing amber The switch is experiencing problems

writing data to or reading data from the
USB drive.

33

Chapter 1: Overview

Note

Console Port

The Console port is an RS232 serial management port. You use the port
to access the AlliedWare Plus management software on the switch to
configure the feature settings or monitor status or statistics. This type of
management uses the management cable included with the unit. It
requires that you be at the physical location of the switch. The switch does
not have to have an IP address for local management.

To establish a local management session with the switch, you use the
provided management cable to connect a terminal or a personal computer
with a terminal emulation program to the Console port, which has an RJ­45 style (8P8C) connector. The cable has RJ-45 style (8P8C) and DB-9
(D-sub 9-pin) connectors.

The Console port has the following settings:

 Default baud rate: 9600 bps (The baud rates of the port are 9600,

19200, 38400, 57600, and 115200 bps.)

 Data bits: 8
 Parity: None
 Stop bits: 1
 Flow control: None

These settings are for a DEC VT100 or ANSI terminal, or an
equivalent terminal emulation program.

34

Power Supply and Fan

Warning

Note

The switches come with one pre-installed power supply. Refer to
“Technical Specifications” on page 87 for the input voltage ranges. A
power cord and retaining clip are included with the switch.

The switches have one ventilation fan located on the back panel. It is not
field-replaceable. The airflow direction is from front to back, with the fan
drawing air out of the switch. Problems with the fan are displayed with the
Fault LED. Refer to “Fault and Power LEDs” on page 31.

GS980M Series Installation Guide

Power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord.  E3

The power supply is not field-replaceable.

35

Chapter 1: Overview

port1.0

.n

Module ID

Port Number

Stack ID

Specifying Ports in the Command Line Interface

The individual ports on the switches are specified with the PORT
parameter in the command line interface of the AlliedWare Plus
management software. The format of the parameter is shown in Figure 10.

Figure 10. PORT Parameter in the Command Line Interface

The three parts of the PORT parameter are described in Table 8.

Table 8. PORT Parameter Format

Number Description

Stack ID Designates the switch’s ID number. This

value is always “1” for GS980M switches.

Module ID Designates the module number of a port.

This value is always 0 (zero) for GS980M
switches.

Port Number Designates a port number.

The format of the PORT parameter is the same for both twisted pair ports
and SFP transceiver ports.

Here is an example of the PORT parameter. It uses the INTERFACE
command to enter the Port Interface mode for ports 15 and 17:

awplus> enable
awplus# configure terminal
awplus(config)# interface port1.0.15,port1.0.17

For instructions on the command line interface and the PORT parameter,
refer to the Software Reference for GS980M Series Switches, AlliedWare
Plus Operating System.

36

Chapter 2

Beginning the Installation

The chapter contains the following sections:

 “Reviewing Safety Precautions” on page 38
 “Installation Options” on page 42
 “Choosing a Site for the Switch” on page 43
 “Unpacking the Switch” on page 44

37

Chapter 2: Beginning the Installation

Note

Warning

Warning

Warning

Warning

Warning

Warning

Reviewing Safety Precautions

Please review the following safety precautions before beginning the
installation procedure.

Safety statements with the  symbol are translated into multiple
languages in the Translated Safety Statements document at
www.alliedtelesis.com/library.

Class 1 Laser product.  L1

Laser Radiation.
Class 1M Laser product.

Do not stare into the laser beam.  L2

Do not look directly at the fiber optic ends or inspect the cable ends
with an optical lens.  L6

To prevent electric shock, do not remove the cover. No user­serviceable 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 LAN cables. 
E1

Do not work on equipment or cables during periods of lightning
activity.  E2

38

GS980M Series Installation Guide

Warning

Warning

Note

Caution

Warning

Note

Warning

Caution

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

Operating Temperatures. This product is designed for a maximum
ambient temperature of 50° degrees C.  E52

All Countries: Install product in accordance with local and National
Electrical Codes.  E8

Only trained and qualified personnel are allowed to install or replace
this equipment.  E14

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 overcurrent protection and
supply wiring. Appropriate consideration of equipment nameplate
ratings should be used when addressing this concern.  E21

39

Chapter 2: Beginning the Installation

Caution

Warning

Warning

Note

Warning

Note

Risk of explosion if battery is replaced by an incorrect type. Replace
only with the same or equivalent type recommended by the
manufacturer. Dispose of used batteries according to the
manufacturer’s instructions.

Attention: Le remplacement de la batterie par une batterie de type
incorrect peut provoquer un danger d’explosion. La remplacer
uniquement par une batterie du même type ou de type équivalent
recommandée par le constructeur. Les batteries doivent être
éliminées conformément aux instructions du constructeur.  E22

Mounting of the equipment in the rack should be such that a
hazardous condition is not created due to uneven mechanical
loading.  E25

The chassis may be heavy and awkward to lift. Allied Telesis
recommends that you get assistance when mounting the chassis in
an equipment rack.  E28

Use dedicated power circuits or power conditioners to supply
reliable electrical power to the device.  E27

This unit might have more than one power cord. To reduce the risk
of electric shock, disconnect all power cords before servicing the
unit.  E30

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

40

GS980M Series Installation Guide

Caution

Warning

Warning

Warning

Caution

Warning

Caution

Warning

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

To reduce the risk of electric shock, the PoE ports on this product
must not be connected to cabling that is routed outside the building
where this device is located.  E40

This product may have multiple AC power cords installed. To de­energize this equipment, disconnect all power cords from the device.
 E41

An Energy Hazard exists inside this equipment. Do not insert hands
or tools into open chassis slots or plugs.  E44

This equipment shall be installed in a Restricted Access location. 
E45

The unit does not contain serviceable components. Please return
damaged units for servicing.  E42

The temperature of an operational SFP or SFP+ transceiver may
exceed 70° C (158° F). Exercise caution when removing or handling
transceivers with unprotected hands.  E43

41

Chapter 2: Beginning the Installation

Tabletop

Standard 19-inch
equipment rack

Wood or
concrete wall

Installation Options

Figure 11 illustrates the three installation options.

Figure 11. Installation Options

42

Choosing a Site for the Switch

Warning

Observe these requirements when planning the installation of the switch.

 Before installing the switch in an equipment rack, check that the

rack is safely secured so that it will not tip over. Devices in a rack
should be installed starting at the bottom of the rack, with the
heavier devices near the bottom.

 Before installing the switch on a table, verify that the table is level

and stable.

 Before installing the switch on a wall, verify that the wall’s material

is strong enough to hold the switch’s weight. You should position
the device so that it can be screwed into the wall’s framing timber
or equivalent structural element.

 The power outlet should be located near the switch and be easily

accessible.

 The site should allow for easy access to the ports on the front of

the switch so that you can easily connect and disconnect cables,
and view the port LEDs.

GS980M Series Installation Guide

 The site should allow for adequate air flow around the unit and

through the cooling vents on the front and rear panels. (The
ventilation direction is from front to back.)

 Do not place objects on top of the switch.
 The site should not expose the switch to moisture or water.
 The site should be a dust-free environment.
 The site should use dedicated power circuits or power conditioners

to supply reliable electrical power to the network devices.

 Do not install the switch in a wiring or utility box that does not have

adequate airflow. The switch might overheat and shutdown.

Switches should not be stacked on a table or desktop. They could
present a physical safety hazard if you need to move or replace
switches.  E91

43

Chapter 2: Beginning the Installation

Note

Accessory Kit

Unpacking the Switch

Figure 12 shows the shipping box.

Figure 12. GS980M Switch Shipping Box

You should retain the original packaging material in case you need
to return the unit to Allied Telesis.

Figure 13 on page 45 lists the items in the accessory kit. Contact your
Allied Telesis sales representative for assistance if any item is missing or
damaged.

44

GS980M Series Installation Guide

Four wall/equipment rack
brackets

One 2m (6.6 ft) local management
cable with RJ-45 (8P8C) and DB-9 (D­sub 9-pin) connectors.

Sixteen screws for attaching the wall/
equipment rack brackets to the
switch.
Length: 6.0mm (0.2 in.)
Diameter: 4.0mm (0.2 in.)

One regional AC power cords

Four anchors for concrete walls:
Length: 29.6mm (1.2 in.)
Diameter: 6.0mm (0.2 in.)

Four screws for wood or concrete
walls:
Length: 32mm (1.3 in.)
Diameter: 4mm (0.2 in.)

Power cord retaining clip

Four bumper feet with rivets

Figure 13. Accessory Kit Items

45

Chapter 2: Beginning the Installation

46

Chapter 3

Warning

Rivet

Rivet Housing

Bumper Foot

Installing the Switch on a Table or Desktop

This chapter contains the instructions for installing the switch on a table or
desktop.

Switches should not be stacked on a table or desktop. They could
present a physical safety hazard if you need to move or replace
switches.  E91

The bumper feet for the bottom of the switch are reusable. If they are
already assembled, disassemble them by removing the rivets and rivet
housings from the bumper feet and then the rivets from the housings.
Refer to Figure 14.

Figure 14. Parts of the Bumper Feet

To install the chassis on a table, perform the following procedure:

1. Review the procedure in Chapter 2, “Choosing a Site for t he Switch” on
page 43 to verify that the selected site is suitable for the unit.

2. Verify that the table is strong enough to support the weight of the
switch.

3. Verify that the accessory kit came with all the appropriate items. Refer
to Figure 13 on page 45.

4. Lift the chassis from the shipping box and place it upside down on a
table.

47

Chapter 3: Installing the Switch on a Table or Desktop

5. Install the bumper feet as follows:
a. Inset a rivet housing into a bumper foot. Refer to Figure 15.

b. Place the bumper foot on one of the corner holes in the base of the

switch. Refer to Figure 16.

Figure 15. Inset the Rivet Housing into the Bumper Foot

48

Figure 16. Place the Bumper Foot on a Base Corner Hole

c. Insert the rivet to secure the bumper foot to the base. Refer to

Figure 17 on page 49.

GS980M Series Installation Guide

Figure 17. Inserting the Rivet into the Bumper Foot

d. Repeat this step to install the remaining bumper feet.

6. Turn the switch over and place it on a flat, secure desk or table, leaving
ample space around it for ventilation.

7. Go to Chapter 6, “Cabling the Networking Ports and Powering On the
Switch” on page 69.

49

Chapter 3: Installing the Switch on a Table or Desktop

50

Chapter 4

Installing the Switch in an Equipment Rack

This chapter contains the instructions for installing the switch in a standard
19-inch equipment rack. The procedures in this chapter are listed here:

 “Beginning the Installation” on page 52
 “Removing the Bumper Feet” on page 54
 “Installing the Switch” on page 55

51

Chapter 4: Installing the Switch in an Equipment Rack

Bracket Holes

Beginning the Installation

This chapter contains the procedure for installing the switch in a standard
19-inch equipment rack, with the brackets included with the unit.

Required Items The following items are required to install the switch in an equipment rack:

 Two equipment rack brackets (included with the switch)
 Eight M4x6mm bracket screws (included with the switch)
 Cross-head screwdriver (not provided)
 Four standard equipment rack screws (not provided)

Switch

Orientations in

the Equipment

Rack

The switch has two sets of four screw holes on the left and right sides, for
attaching the brackets. Refer to Figure 18.

Figure 18. Bracket Holes on the Switch

You can use the sets of holes on the switch to install the switch in the
equipment rack in different orientations. You can install it with the front
panel flush with, extending in front of, or recessed behind the front of the
equipment rack. Refer to Figure 19 on page 53.

52

GS980M Series Installation Guide

Figure 19. GS980M Switch Orientations in an Equipment Rack

53

Chapter 4: Installing the Switch in an Equipment Rack

Removing the Bumper Feet

The bumper feet included with the switch should not be used when
installing the device in an equipment rack. If they are already installed,
perform the following procedure to remove them:

1. Place the switch upside down on a level, secure surface.

2. Use a small flat-head screwdriver to pry the feet from the bottom of the
switch. Refer to Figure 20.

Figure 20. Removing the Bumper Feet

3. Turn the switch back over.

4. Go to“Installing the Switch” on page 55.

54

Installing the Switch

Caution

Please review the installation guidelines in “Choosing a Site for the Switch”
on page 43 before installing the switch.

To install the switch in a 19-inch equipment rack, perform the following
procedure:

1. Place the switch on a level, secure surface.

2. If you have not chosen an orientation for the switch in the equipment

GS980M Series Installation Guide

The chassis may be heavy and awkward to lift. Allied Telesis
recommends that you get assistance when mounting the chassis in
an equipment rack.  E28

rack, review “Switch Orientations in the Equipment Rack” on page 52.

3. Attach two brackets to the sides of the switch in the selected position,
using eight of the M4x6mm screws included with the unit. The
illustration in Figure 21 shows the installation of the brackets so that
the front panel of the switch is even with the front of the equipment
rack.

Figure 21. Example of Attaching the Brackets to the Switch

4. Have another person hold the switch at the desired location in the
equipment rack while you secure it using four standard equipment rack
screws (not provided). Refer to Figure 22 on page 56.

55

Chapter 4: Installing the Switch in an Equipment Rack

5. Go to Chapter 6, “Cabling the Networking Ports and Powering On the
Switch” on page 69.

Figure 22. Installing the Switch in an Equipment Rack

56

Chapter 5

Installing the Switch on a Wall

The procedures in this chapter are listed here:

 “Switch Orientations on a Wall” on page 58
 “Installation Guidelines” on page 59
 “Plywood Base” on page 61
 “Installing a Plywood Base” on page 63
 “Installing the Switch on a Plywood Base” on page 64
 “Installing the Switch on a Concrete Wall” on page 66

57

Chapter 5: Installing the Switch on a Wall

Switch Orientations on a Wall

You can install the switch on a wall with the front panel on the left or right,
as shown in Figure 23. Do not install it with the front panel on the top or
bottom.

58

Figure 23. Positioning the Switch on a Wall

Installation Guidelines

Warning

Warning

Note

Here are guidelines to installing the switch on a wall:

 You can install the switch on a wall with wooden studs or on a

 If you are installing the switch on a wall with wooden studs, you

 You should not install the switch on a wall that has metal studs.

 You should not install the switch on sheetrock or similar material.

GS980M Series Installation Guide

concrete wall.

should use a plywood base to support the switch. For more
information, refer to “Plywood Base” on page 61. A plywood base
is not required for a concrete wall.

Metal studs may not be strong enough to safely support the device.

Sheetrock is not strong enough to safely support the device.

The device is heavy. Always ask for assistance before moving or
lifting it to avoid injuring yourself or damaging the equipment.

Tools and

Material

The device should be installed on a wall by a qualified building
contractor. Serious injury to yourself or others or damage to the
equipment may result if it is not properly fastened to the wall. 
E105

Before starting, verify that the wall is sturdy enough to hold the
switch’s weight. You should position the switch so that it can be
screwed into the wall’s framing timber or equivalent structural
element. The wall location must provide adequate space to the front
and back panels so that you can service the unit, and for ventilation.

Here are the required tools and material for installing the switch on a wall:

 Four wall/equipment rack brackets and sixteen screws (included

with the switch)

 Four wood or concrete wall screws (included with the switch)
 Four concrete wall anchors (included with the switch)
 Cross-head screwdriver (not provided)
 Flat-head screwdriver (not provided)
 Stud finder for a wooden wall, capable of identifying the middle of

59

Chapter 5: Installing the Switch on a Wall

Caution

wall studs and hot electrical wiring (not provided)

 Drill and 1/4” carbide drill bit for a concrete wall (not provided)
 Plywood base (not provided) for installing the switch on a wall with

wooden studs. Refer to “Plywood Base” on page 61.

 Four screws for attaching the plywood base (not provided)

The supplied screws and anchors might not be suitable for all walls.
A qualified building contractor should determine the hardware
requirements of your wall prior to installing the switch.  E88

60

Plywood Base

Wall Studs

Wall

Plywood Base

GS980M Series Installation Guide

If you are installing the switch on a wall with wooden studs, Allied Telesis
recommends using a plywood base for the device. (A plywood base is not
required for a concrete wall.) Refer to Figure 24.

Figure 24. Switch on a Wall with a Plywood Base

The plywood base should be mounted to two studs in the wall. The
recommended minimum dimensions of the plywood base for GS980M
Series switches are listed here:

 Width: 55.9 centimeters (22 inches)
 Height: 61.0 centimeters (24 inches)
 Thickness: 2.5 centimeters (1 inch)

61

Chapter 5: Installing the Switch on a Wall

Step 1: Install the

plywood base on

the wall.

Step 2: Install the

switch on the

plywood base.

Plywood
Base

Wall Studs

The dimensions assume the wall studs are 41 centimeters (16 inches)
apart. You might need to adjust the width of the base if the distance
between the studs in your wall is different than the industry standard.

You should install the plywood base on the wall and then install the switch
on the base. Refer to Figure 25.

62

Figure 25. Steps to Installing the Switch with a Plywood Base

Installing a Plywood Base

A plywood base is recommended when installing the switch on a wall that
has wooden studs. Refer to “Plywood Base” on page 61. Consult a
qualified building contractor for installation instructions for the plywood
base. The installation guidelines are listed here:

 You should use a stud finder to identify the middle of studs and hot

electrical wiring in the wall.

 You should attach the base to two wall studs with a minimum of

four screws.

 The selected wall location for the base should provide sufficient

space from other devices or walls so that you can access the front
and back panels, and for adequate air flow for ventilation.

GS980M Series Installation Guide

63

Chapter 5: Installing the Switch on a Wall

Warning

Warning

Installing the Switch on a Plywood Base

This procedure assumes that the plywood base for the switch is already
installed on the wall. Please review “Reviewing Safety Precautions” on
page 38 and “Choosing a Site for the Switch” on page 43 before
performing this procedure. Allied Telesis recommends a minimum of two
people for this procedure.

The device is heavy. Always ask for assistance before moving or
lifting it to avoid injuring yourself or damaging the equipment.

The device should be installed on the wall by a qualified building
contractor. Serious injury to yourself or others or damage to the
equipment may result if it is not properly fastened to the wall. 
E105

To install the switch on the plywood base, perform the following
procedure:

1. Place the switch in a table.

2. Install the four wall/equipment rack brackets to the sides of the unit
with the sixteen M4x6mm screws included with the switch. Refer to
Figure 26.

64

Figure 26. Bracket Positions for Installing Switch on a Wall

GS980M Series Installation Guide

3. Have another person hold the switch on the plywood base on the wall
while you secure it with the four M4x32.3mm screws included with the
switch. Refer to Figure 27.

Please follow these guidelines as you position the switch on the wall:

 Position it so that the front panel is either on the left or right. Refer

to Figure 23 on page 58. Do not install it with the front p anel facing
up or down.

 Leave sufficient space from other devices or walls so that you can

access the front and back panels, and for adequate air ventilation.

Figure 27. Securing the Switch to the Plywood Base

4. Go to Chapter 6, “Cabling the Networking Ports and Powering On the
Switch” on page 69.

65

Chapter 5: Installing the Switch on a Wall

Warning

Warning

Installing the Switch on a Concrete Wall

This section contains the instructions for installing the switch on a
concrete wall. Please review the information in the following sections
before performing the procedure:

 “Switch Orientations on a Wall” on page 58
 “Installation Guidelines” on page 59

The device is heavy. Always ask for assistance before moving or
lifting it to avoid injuring yourself or damaging the equipment.

The device should be installed on the wall by a qualified building
contractor. Serious injury to yourself or others or damage to the
equipment may result if it is not properly fastened to the wall. 
E105

To install the switch on a concrete wall, perform the following procedure:

1. Place the switch in a table.

2. Install the four wall/equipment rack brackets to the sides of the unit
with the sixteen M4x6mm screws included with the switch. Refer to
Figure 26 on page 64.

3. Have another people hold the switch on the concrete wall at the
selected location for the device while you use a pencil or pen to mark
the wall with the locations of the four screw holes in the four brackets
(one screw per bracket). Refer to Figure 28 on page 67.

Please follow these guidelines as you position the switch on the wall:

 Position the switch so that the front panel is either on the left or the

right. Refer to Figure 23 on page 58. You may not install the switch
with the front panel facing up or down.

 Leave sufficient space from other devices or walls so that you can

access the front and back panels, and for adequate air ventilation.

66

GS980M Series Installation Guide

Figure 28. Marking the Locations of the Bracket Holes on a Concrete Wall

4. Place the switch on a table or desk.

5. Use a drill and 1/4” carbide drill bit to pre-drill the holes you marked in
step 4. Please review the following guidelines:

 Prior to drilling, set the drill to hammer and rotation mode. The

modes break up the concrete and clean out the hole.

 Allied Telesis recommends cleaning out the holes with a brush or

compressed air.

6. Insert the provided four anchors into the holes.

7. Have another person hold the switch at the selected wall location while
you secure it to the wall with the four M4x32mm provided screws.
Refer to Figure 29 on page 68.

67

Chapter 5: Installing the Switch on a Wall

Figure 29. Installing the Switch on a Concrete Wall

8. Go to Chapter 6, “Cabling the Networking Ports and Powering On the
Switch” on page 69.

68

Chapter 6

Cabling the Networking Ports and Powering On the Switch

This chapter contains the following procedures:

 “Cabling Twisted Pair Ports” on page 70
 “Guidelines to Handling SFP Transceivers” on page 71
 “Installing SFP Transceivers” on page 72
 “Powering On the Switch” on page 76
 “Starting a Local Management Session” on page 79
 “Verifying the Switch with AlliedWare Plus Commands” on page 81

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Chapter 6: Cabling the Networking Ports and Powering On the Switch

Cabling Twisted Pair Ports

Here are the guidelines to cabling the twisted pair ports:

 The cable specifications for the ports on the switch are given in

“Cable Requirements” on page 22.

 PoE is enabled by default on the ports on the AT-GS980M/52PS

switch.

 The connectors on the cables should fit snugly into the ports, and

the tabs should lock the connectors into place.

 The default speed setting for the ports is Auto-Negotiation. This

setting is appropriate for ports connected to network devices that
also support Auto-Negotiation.

 The ports must be set to Auto-Negotiation, the default setting, to

operate at 1000Mbps.

 The ports support half- and full-duplex at 10Mbps or 100Mbps.
 The ports support only full-duplex at 1000Mbps.
 Do not attach cables to ports of static or LACP port trunks until

after you configure the trunks on the switch. Otherwise, the ports
will form network loops that can adversely affect network
performance.

70

Guidelines to Handling SFP Transceivers

Caution

Please review the following guidelines before installing SFP transceivers
in the switches:

 The transceivers are hot-swappable. You can install them while the

switch is powered on.

 For a list of supported transceivers, refer to the product data sheet

on the Allied Telesis web site.

 The operational specifications and fiber optic cable requirements of

the transceivers are provided in the documents included with the
devices.

 You should install a transceiver before connecting its fiber optic

cable.

 Fiber optic transceivers are dust sensitive. Always keep the plug in

the optical bores when a fiber optic cable is not installed, or when
you store the transceiver. When you do remove the plug, keep it for
future use.

GS980M Series Installation Guide

 Unnecessary removal and insertion of a transceiver can lead to

premature failure.

Transceivers 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
devices.  E92

71

Chapter 6: Cabling the Networking Ports and Powering On the Switch

Installing SFP Transceivers

This section contains installation instructions for SFP transceivers. The
illustrations show a transceiver with a duplex LC connector. The
connectors on your transceivers may be different. Please review
“Guidelines to Handling SFP Transceivers” on page 71 before performing
this procedure.

To install transceivers, perform the following procedure:

1. Select a port for the transceiver.

2. If the port has a dust cover, remove it. Refer to Figure 30.

72

Figure 30. Removing the Dust Plug from an SFP Port

3. Remove the transceiver from its shipping container and store the
packaging material in a safe location.

4. If you are installing the transceiver in a top port, position the
transceiver with the Allied Telesis label facing up. If you are installing
the transceiver in a bottom port, position the transceiver with the label
facing down. Refer to Figure 31 on page 73.

GS980M Series Installation Guide

Note

Figure 31. Installing an SFP Transceiver

5. Slide the transceiver into the port until it clicks into place.

If you are ready to attach the fiber optic cable to the transceiver,
continue with the next step. Otherwise, repeat steps 1 to 5 to install
the remaining transceivers in the switch.

6. Remove the dust cover from the transceiver, as shown in Figure 32 on
page 74.

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Chapter 6: Cabling the Networking Ports and Powering On the Switch

SFP Handle

Figure 32. Removing the Dust Cover from an SFP Transceiver

7. Verify the position of the handle on the transceiver. If the transceiver is
in a top port, the handle should be in the upright position, as shown in
Figure 33. If the transceiver is in a bottom port, the handle should be in
the down position.

74

Figure 33. Positioning the SFP Handle in the Upright Position

8. Connect the fiber optic cable to the transceiver, as shown in Figure 34
on page 75. The connector on the cable should fit snugly into the port,
and the tab should lock the connector into place.

GS980M Series Installation Guide

Figure 34. Connecting a Fiber Optic Cable to an SFP Transceiver

9. Repeat this procedure to install additional transceivers.

75

Chapter 6: Cabling the Networking Ports and Powering On the Switch

Warning

Note

Powering On the Switch

Before powering on the switch, review the information in “Power
Specifications” on page 90 for the power specifications.

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

To power on the switch, perform the following procedure:

1. Install the power cord retaining clip on the AC power connector on the
rear panel of the switch, as shown in Figure 35.

76

Figure 35. Installing the Power Cord Retaining Clip

GS980M Series Installation Guide

2. Connect the AC power cord to the AC power connector on the rear
panel. Refer to Figure 36.

Figure 36. Connecting the AC Power Cord

3. Lower the power cord retaining clip to secure the cord to the switch.
Refer to Figure 37.

Figure 37. Lowering the Power Cord Retaining Clip

77

Chapter 6: Cabling the Networking Ports and Powering On the Switch

Note

4. Connect the power cord to an appropriate AC power source. Refer to
Figure 38.

Figure 38. Connecting the Power Cord to an AC Power Source

The illustration shows a North American power cord. Your power
cord may be different.

5. Wait two minutes for the switch to initialize the management software.
The installation is complete. The switch is now ready for network

operations. To start managing the switch, refer to “Starting a Local
Management Session” on page 79.

78

Starting a Local Management Session

Note

After you have powered on the switch and waited two minutes for it to
initialize its management software, start a local management session
using the Console port on the management panel, as explained in this
section.

The initial management session must be from the Console port.

To start a local management session, perform the following procedure:

1. Connect the RJ-45 end of the management card included with the
switch to the Console RS-232 port on the management panel. Refer to
Figure 39.

GS980M Series Installation Guide

Figure 39. Connecting the Management Cable to the Console RS-232 Port

2. Connect the other end of the cable to an RS-232 port on a terminal or
personal computer with a terminal emulation program.

3. Configure the VT-100 terminal or terminal emulation program as
follows:

 Default baud rate: 9600 bps (The baud rates of the Console port

are 9600, 19200, 38400, 57600, and 115200 bps.)

 Data bits: 8
 Parity: None
 Stop bits: 1
 Flow controller: None

79

Chapter 6: Cabling the Networking Ports and Powering On the Switch

Note

Note

Note

awplus>

The port settings are for a DEC VT100 or ANSI terminal, or an
equivalent terminal emulator program.

4. Press Enter. You are prompted for a user name and password.

5. Enter the default user name and password. They are “manager” and
“friend” (without quotes), respectively

User names and passwords are case sensitive.

The local management session starts when the User Exec mode
prompt, shown in Figure 40. is displayed.

Figure 40. User Exec Mode Prompt

The User Exec mode is the first level in the command mode
interface. For complete information on the modes and commands,
refer to the Software Reference for GS980M Series Switches,
AlliedWare Plus Operating System from www.alliedtelesis.com.

6. Go to “Verifying the Switch with AlliedWare Plus Commands” on
page 81.

80

Verifying the Switch with AlliedWare Plus Commands

Now that you have installed the switch and powered it on for the first time,
you should verify that the hardware components are operating correctly.
The following procedure show how to do this using commands in the
AlliedWare Plus operating system. To verify the hardware operations of
the switch, perform the following procedure:

1. Start a local management session on the switch. For instructions, refer
to “Starting a Local Management Session” on page 79.

2. To display the status of the power supply, enter the SHOW SYSTEM
ENVIRONMENT command in the User Exec or Privileged Exec mode.
The Status column in the display provides the states of the modules.
Components are operating normally when they have an “Ok” status.

3. To display the states of the ports, use the SHOW INTERFACE
STATUS command in the Privileged Exec mode.

GS980M Series Installation Guide

For information about the command line interface, refer to the Software
Reference for AT-x950 Switches on the Allied Telesis web site.

81

Chapter 6: Cabling the Networking Ports and Powering On the Switch

82

Chapter 7

Note

Troubleshooting

This chapter contains suggestions on how to troubleshoot problems with
the switch.

For further assistance, please contact Allied Telesis Technical
Support at www.alliedtelesis.com/support.

Problem 1: All port and system LEDs are off, and the fan is not operating.
Solutions: The unit is not receiving power. Try the following:

 Verify that the power cord is securely connected to the power

source and 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. The power requirements for the switch are
listed in “Power Specifications” on page 90.

Problem 2: All of the port LEDs are off even though the ports are
connected to active network devices.

Solution: The switch might be operating in the low power mode. To toggle
on the LEDs, press the eco-friendly button on the front panel of the switch.
You can also toggle the LEDs off and on with the ECOFRIENDLY LED and
NO ECOFRIENDLY LED commands in the command line interface.

Problem 3: A LINK/ACT LED is off for a twisted pair port that is connected
to an active network device.

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 does not exceed 100 meters (328

feet).

83

Chapter 7: Troubleshooting

Note

 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 you are using the appropriate category of twisted pair

cable. Refer to “Cable Requirements” on page 22.

 Verify that the port is connected to the correct twisted pair cable.

Twisted pair ports may require five to ten seconds to establish a link.

Problem 4: The LINK/ACT LED is off for an SFP transceiver that is
connected to an active network device.

Solutions: The fiber optic port on the transceiver is unable to establish a
link to a network device. Try the following:

 Verify that the remote network device is operating properly.
 Verify that the fiber optic cable is securely connected to the p ort on

the transceiver and to the port on the remote network device.

 Check that the transceiver is fully inserted in the slot.
 Verify that the operating specifications of the fiber optic ports on

the transceiver and 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.
 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 management software to verify that the port is enabled.
 If the remote network device is a managed device, use its

management firmware to determine whether its port is enabled.

 If two BiDi (bi-directional) transceivers cannot establish a link, refer

to their data sheets to verify that their transmission and reception
frequencies are opposite to each other. For instance, a BiDi
transceiver that transmits and receives at 1310nm and 1550nm,
respectively, has to be connected to a transceiver that transmits
and receives at 1550nm and 1310nm, respectively. Two BiDi
transceivers cannot establish a link if they transmit and receive at
the same frequencies.

 Test the attenuation of both directions 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 5: The AT-GS980M/52PS Switch is not providing power to any
powered devices or to only a few devices whose power requirements are

84

GS980M Series Installation Guide

below the power budget of 740W.
Solution: The power supply in the switch may have a problem. Start a

management session and use the SHOW SYSTEM ENVIRONMENT
command in the management software to determine the status of the
power supply.

Problem 6: A port on the AT-GS980M/52PS Switch is not providing power
to a PoE or PoE+ device.

Solutions: Try the following:

 Check the port’s PoE LED. Refer to Figure 5 on page 24 and

Table 3 on page 25. If the LED is flashing amber, the switch cannot
support additional PoE devices device because it is already
providing its maximum power to other devices. The maximum
power budget for the switch is 740W.

 Review the PD’s documentation to confirm that the device supports

Mode A of the IEEE 802.3at standard and that it uses pins 1, 2, 3,
and 6 on the RJ-45 port to receive power. Refer to “Wiring
Implementation” on page 28.

 Check that the device’s power requirements do not exceed 30W by

reviewing its documentation or data sheet.

 Verify that you are using the appropriate category of twisted-pair

cable. Refer to “Cable Requirements” on page 22.

 Use the management software on the switch to determine wh ether

PoE is enabled on the port. The default setting for PoE is enabled.

 Use the management software on the switch to determine wh ether

the PoE power setting for the port has been reduced to a value
below the power requirements of the device.

 Try connecting the device to a different port on the switch.

Problem 7: The switch functions intermittently.
Solutions: Check the system hardware status through the management

software:

 Use the SHOW SYSTEM ENVIRONMENT command in the

Privileged Exec mode to verify that the input voltage from the
power source to the switch is stable and within the approved
operating range. The unit will shut down if the input voltage
fluctuates above or below the approved operating range.

 Use the SHOW SYSTEM ENVIRONMENT command in the

Privileged Exec mode to verify that the fan is operating correctly.

 Verify that the location of the switch allows for adequate airflow.

The unit will shut down if it overheats.

85

Chapter 7: Troubleshooting

86

Appendix A

Technical Specifications

This appendix contains the following sections:

 ”Physical Specifications” on page 88
 ”Environmental Specifications” on page 89
 ”Power Specifications” on page 90
 ”Certificates” on page 91
 ”RJ-45 Twisted Pair Port Pinouts” on page 92
 ”RJ-45 Style Serial Console Port Pinouts” on page 94

87

Appendix A: Technical Specifications

Physical Specifications

Dimensions (H x W x D)

Table 9 lists the dimensions of the switches.

AT-GS980M/52 4.4 cm x 44.1 cm x 32.3 cm

AT-GS980M/52PS 4.4 cm x 44.1 cm x 35.9 cm

Weights

Table 10 lists the weights of the switches.

Table 9. Product Dimensions

(1.7 in. x 17.3 in. x 12.7 in.)

(1.7 in. x 17.3 in. x 14.1 in.)

Table 10. Product Weights

AT-GS980M/52 4.5 kg (9.9 lb.)
AT-GS980M/52PS 5.8 kg (12.8 lb.)

Ventilation

Table 11 lists the ventilation requirements.

Table 11. Ventilation Requirements

Recommended Minimum
Ventilation on All Sides

10 cm (4.0 in)

88

Environmental Specifications

Table 12 lists the environmental specifications of the switches.

Operating Temperature 0° C to 50° C (32° F to 122° F)
Storage Temperature -25° C to 70° C (-13° F to 158° F)
Operating Humidity 5% to 90% noncondensing
Storage Humidity 5% to 95% noncondensing
Maximum Operating Altitude 3,000 m (9,842 ft)
Maximum Nonoperating Altitude 4,000 m (13,100 ft)

GS980M Series Installation Guide

Table 12. Environmental Specifications

89

Appendix A: Technical Specifications

Power Specifications

This section contains the maximum power consumption values, input
voltages, and heat dissipation values.

Maximum Power Consumption

Table 13 lists the maximum power consumptions for the switches.

AT-GS980M/52 48 watts
AT-GS980M/52PS 946 watts

Input Voltages

Table 14 lists the input voltages for the switches.

Table 13. Maximum Power Consumptions

Table 14. Input Voltages

AT-GS980M/52 100-240 VAC

50/60 Hz

AT-GS980M/52PS 100-240 VAC

50/60 Hz

Heat Dissipations

Table 15 lists the heat dissipations for the switches.

Table 15. Heat Dissipations

AT-GS980M/52 164 BTU/hr
AT-GS980M/52PS 3,230 BTU/hr

~, 1.0A maximum,

~, 12-6A maximum,

90

Certificates

Laser Safety EN60825

GS980M Series Installation Guide

Table 16 lists the product certificates.

Table 16. Product Certificates

Category Certificates

EMC EN 55024

EN 55032 Class A
EN 61000-3-2
EN 61000-3-3
FCC Part 15 (CFR 47) Class A
VCCI Class A
CISPR 22 Class A
ICES-003

Environmental Compliance RoHS

WEEE

Electrical Safety EN 60950-1 (second edition)

CAN/CSA-C22.2 No. 60950-1-07 (second
edition)
UL 60950-1 (second edition)
cULus Mark
TUV-T-Mark

Regulatory Compliance RCM

CE

91

Appendix A: Technical Specifications

RJ-45 Twisted Pair Port Pinouts

Figure 41 illustrates the pin layout of the RJ-45 twisted pair ports on the
AT-GS980M/52 and AT-GS980M/52PS Switches.

Figure 41. Pin Layout for the RJ-45 Twisted Pair Ports (Front View)

Table 17 lists the pin signals at 100Mbps.

Table 17. Pin Signals on the RJ-45 Twisted Pair Ports at 10 or 100Mbps

Pin MDI Signal MDI-X Signal

1TX+ RX+
2TX- RX­3RX+ TX+
4 Not used Not used
5 Not used Not used
6RX- TX­7 Not used Not used
8 Not used Not used

Table 18 lists the pin signals at 1Gbps

Table 18. Pin Signals on the RJ-45 Twisted Pair Ports at 1Gbps

Pinout Pair

92

1Pair 1 +
2Pair 1 ­3Pair 2 +

GS980M Series Installation Guide

Table 18. Pin Signals on the RJ-45 Twisted Pair Ports at 1Gbps

4 Pair 3 +
5 Pair 3 ­6 Pair 2 ­7 Pair 4 +
8 Pair 4 -

93

Appendix A: Technical Specifications

RJ-45 Style Serial Console Port Pinouts

Table 19 lists the pin signals of the RJ-45 style serial Console port.

Table 19. Pin Signals of the RJ-45 Style Serial Console Port

Pin Signal

1 Looped to pin 8.
2 Looped to pin 7.
3 Transmit Data
4 Ground
5 Ground
6 Receive Data
7 Looped to pin 2.
8 Looped to pin 1.

94