Allied Telesis AT-GS924MX

Questions and Answers

A
adam33Aug 13, 2025
What to do if Allied Telesis Switch AT-GS924MPX/AT-GS948MPX is not providing power to PoE device?
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  steven33Aug 13, 2025
  If your Allied Telesis AT-GS924MPX or AT-GS948MPX switch isn't providing power to a PoE device, ensure the device supports Alternative B of the IEEE 802.3at standard by checking its documentation. Also, verify that the device's power needs don't exceed 30W and that you're using the correct twisted-pair cable. Using the switch's management software, check if PoE is enabled on the port and that the PoE power setting hasn't been reduced below the device's requirements. As a last resort, try connecting the device to a different port on the switch.
R
Raven WalkerAug 16, 2025
What to do if the LINK/ACT LED is off on Allied Telesis AT-GS924MX?
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  Amanda FordAug 16, 2025
  If the LINK/ACT LED is off even when a twisted pair port on your Allied Telesis switch is connected to a network device, first ensure the port is using the correct twisted pair cable. Verify the connected network device is powered on and working correctly. Try connecting another network device to the port using a different cable. Confirm that the twisted pair cable is under 100 meters (328 feet) and that you're using the appropriate category of twisted pair cable.
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Thomas LevyAug 25, 2025
How to fix Allied Telesis AT-GS924MX Switch ID LED being off?
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  tammycrossAug 25, 2025
  If the Switch ID LED on the front of your Allied Telesis switch is off, verify that the power cord is securely connected to both the power source and the AC connector on the switch's back panel. Check if the power outlet is working by plugging in another device. Try connecting the switch to a different power source and using a different power cord. Also, confirm that the voltage from your power source matches the required levels for your region.
S
Suzanne FuentesAug 28, 2025
Why SHOW STACK command is not displaying all switches in Allied Telesis stack?
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  Michael MillerAug 28, 2025
  If the SHOW STACK command isn't displaying all switches in your Allied Telesis stack, check that the stacking transceivers in the S1 and S2 slots are correctly cabled, ensuring the stacking cables cross over to different slots. Verify the transceivers are fully inserted into the S1 and S2 slots. Confirm that VCStack is activated on all switches. The issue might also be due to incompatible versions of the management software on the switches.
B
Bruce JensenSep 1, 2025
What to do if all port LEDs are off on Allied Telesis AT-GS924MX Switch?
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  Harold CarterSep 1, 2025
  If all the port LEDs on your Allied Telesis switch are off, even when connected to active network devices, the switch might be in low power mode. To turn the LEDs on, press the eco-friendly button on the front panel. Alternatively, use the ECOFRIENDLY LED and NO ECOFRIENDLY LED commands in the command line interface to toggle the LEDs.
A
andreagillespieSep 4, 2025
How to troubleshoot intermittent function of Allied Telesis AT-GS924MX?
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  Barry BlanchardSep 4, 2025
  If your Allied Telesis switch is functioning intermittently, use the SHOW SYSTEM ENVIRONMENT command in Privileged Exec mode to check that the input voltage from the power source is stable and within the correct operating range. Also use the SHOW SYSTEM ENVIRONMENT command to verify that the fan is operating correctly. Ensure that the switch has adequate airflow in its location.
S
samuel70Sep 8, 2025
What does flashing 'F' on Allied Telesis AT-GS924MX ID LED mean?
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  Curtis RodgersSep 8, 2025
  If the Switch ID LED on the front of your Allied Telesis switch is flashing 'F', it indicates a cooling fan has failed, the input voltage on the power supply is outside the normal range, or the internal temperature of the switch has exceeded the normal range, potentially leading to shutdown.
C
cody23Nov 19, 2025
How to fix LINK/ACT LED being off for SFP transceiver on Allied Telesis AT-GS924MX?
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  Tiffany ColeNov 20, 2025
  If the LINK/ACT LED for an SFP transceiver on your Allied Telesis switch is off, verify that the remote network device connected to the fiber optic port is operating properly. Ensure the fiber optic cable is securely connected to both the SFP module and the remote network device. Check that the transceiver is fully inserted and not in slots S1 or S2. Confirm that the operating specifications of the fiber optic ports on both devices are compatible and that you're using the correct type of fiber optic cabling. Also, verify the port is connected to the correct fiber optic cable. Try connecting another network device with a different cable. Use the switch’s management software to verify that the port is enabled, and if the remote device is managed, check its firmware to see if its port is enab...

Allied Telesis AT-GS924MX Specifications

General

Weight	3.5 kg
Management	Web-based, CLI, SNMP
Quality of Service (QoS)	Yes
Product Type	Managed Switch
Ports	24 x 10/100/1000BASE-T ports, 4 x 10G SFP+ ports
MAC Address Table Size	16, 000
Jumbo Frames	Up to 9, 216 bytes
Dimensions (W x D x H)	44 mm
Power over Ethernet (PoE)	No
Power Supply	Internal
Operating Temperature	0 to 50 °C
VLAN Support	Yes
Security Features	Port security

Summary

Electrical Safety and Emissions Standards

U.S. Federal Communications Commission

Details FCC standards for emissions and interference compliance.

Industry Canada

Details Canadian standards for emissions and interference compliance.

Chapter 1: Overview

Document Conventions

Explains document symbols, notes, cautions, and warnings.

Contacting Allied Telesis

Provides contact information and support resources.

Features

Lists AT-GS900MX Series switch models and their core features.

Installation Options

Outlines methods for installing switches in a stack.

Front and Back Panels

Illustrates the physical layout of switch front and back panels.

Management Panel

Identifies the components of the switch's management panel.

10;100;1000 Base-T Twisted Pair Ports

Details the specifications and capabilities of twisted pair ports.

Power over Ethernet

Explains PoE functionality, standards, and power budget.

SFP Slots

Describes the types of SFP transceivers supported and their use.

Combo Twisted Pair Ports and SFP Slots

Explains how twisted pair and SFP ports form combo pairs.

Stacking Slots

Details the S1 and S2 slots for VCStack and stacking transceivers.

eco-friendly Button

Explains the function of the eco-friendly button for LED control.

LEDs

Describes the function and meaning of various switch LEDs.

USB Port

Details the function and compatibility of the switch's USB port.

Console Port

Explains the use and connection specifications for the console port.

Power Supply

Describes the switch's AC power supply and connector.

Chapter 2: Virtual Chassis Stacking

Overview

Introduces the VCStack feature and its benefits for managing switches.

Stacking Slots and Transceivers

Discusses the S1/S2 stacking slots and required transceivers.

Stacking Port Topologies

Explains the linear and ring topologies for connecting switches.

Master and Member Switches

Defines the roles of master and member switches in a VCStack.

Specifying Ports in the Command Line Interface

Details how to reference individual ports via CLI commands.

Chapter 3: Beginning the Installation

Reviewing Safety Precautions

Lists critical safety warnings and precautions for installation.

Selecting a Site for the Stack

Provides guidelines for choosing an appropriate installation location.

Planning a Stack

Outlines key considerations and guidelines for planning a switch stack.

Unpacking the Switch

Instructions for unpacking the switch and its included components.

Chapter 4: Installing the Switch on a Table or in an Equipment Rack

Installing the Switch on a Table

Procedure for safely placing the switch on a table or desk.

Installing the Switch in an Equipment Rack

Step-by-step guide for mounting the switch in a rack.

Chapter 5: Verifying the Status of VCStack

Verifying the Status of VCStack

Method to check if the VCStack feature is enabled on switches.

Activating the VCStack Feature

Procedure to enable the VCStack feature using local management.

Chapter 6: Cabling the Stacking Ports

Chapter 7: Powering On the Stack

Installing the Power Cord Retaining Clip

Instructions for installing the power cord retaining clip.

Powering On the Switches Individually

Procedure for powering switches on one by one for ID assignment.

Powering On the Switches Simultaneously

Procedure for powering on all switches at once for auto ID assignment.

Verifying the Stack

How to confirm the stack is operational and configured correctly.

Setting the Priority Numbers

Optional procedure to configure switch priority for master selection.

Monitoring the Initialization Processes

How to monitor switch startup messages via console.

Chapter 8: Cabling the Networking Ports

Cabling the Twisted Pair Ports

Guidelines for connecting twisted pair network cables to ports.

Installing SFP Transceivers

Procedure for installing SFP transceivers into switch slots.

Chapter 9: Troubleshooting

Appendix A: Technical Specifications

Physical Specifications

Details dimensions and weights of the AT-GS900MX Series switches.

Environmental Specifications

Specifies operating and storage conditions for the switches.

Power Specifications

Lists input voltages and maximum power consumption.

Certifications

Lists compliance standards and marks for the switches.

RJ-45 Twisted Pair Port Pinouts

Shows the pin layout for RJ-45 network ports.

RJ-45 Style Serial Console Port Pinouts

Details the pin signals for the serial console port.

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