Allied Telesis AT-9000/28 manual Power LED is Off

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Chapter 3 - Troubleshooting

Power LED is Off

Check the PWR LED on the front of the switch. If the LED is off, indicating that the unit is not receiving power, do the following:

Make sure the power cord is securely connected to the power source and to the AC connector on the back panel of the switch.

Verify that the power outlet has power by connecting another device to it.

Try connecting the unit to another power source.

Try using a different power cord.

Check that the voltage from the power source is within the required levels for your region.

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Contents Installation Guide Page Electrical Safety and Emissions Standards Translated Safety Statements Contents Page Preface Safety Symbols Used in this Document Symbol Meaning DescriptionWhere to Find Web-based Guides Management Software Updates Contacting Allied TelesisOverview ChapterSwitch Features Front and Back Panels AT-9000/28Gigabit Ethernet Ports Twisted Pair PortsUplink Ports LEDs LEDRJ-45 Port LEDs & Mode Switch FDX Link LEDs EcoSwitch Front Panel ecoSwitchEthernet Switching Basics MAC Address TableMDI/MDI-X AT-9000/28 Gigabit Ethernet ecoSwitch Installation Guide Overview Installing the Switch Reviewing Safety Precautions AT-9000/28 Gigabit Ethernet ecoSwitch Installation Guide Selecting a Site Twisted Pair and Fiber Optic Cable Specifications Twisted Pair Cable Specifications Optional TransceiverUnpacking the Switch Installing the Switch in a Rack Attaching Rack-Mount BracketsMounting the Switch in a Rack Installing Optional Transceivers Installing an SFP Transceiver1457 Cabling the Twisted Pair or Fiber Optic Ports Applying AC Power Starting a Local Management Session Management Software User’s Guide Warranty Registration Installing the Switch Troubleshooting Power LED is Off Twisted Pair Port Link LED is Off Fiber Optic Port Link LED is Off Cannot Establish a Local Out-of-Band Management Session Troubleshooting Power Specifications Physical SpecificationsEnvironmental Specifications Appendix aSafety and Electromagnetic Emissions Certifications 10/100/1000Base-T Twisted Pair Port ConnectorsCompliance Standards Pin Signal Console Port Pinouts

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AT-9000/28 specifications

The Allied Telesis AT-9000/28 is a versatile and robust network switch designed for organizations seeking to enhance their networking capability. This Layer 2 managed switch delivers a high degree of performance and reliability, making it an ideal choice for businesses that require a seamless network experience.

One of the main features of the AT-9000/28 is its 28 ports, which include 24 Fast Ethernet ports and 4 Gigabit Ethernet uplink ports. This allows for flexible network configuration and scalability, accommodating both wired and wireless devices efficiently. The switch also supports auto-negotiation and auto-MDI/MDI-X, which simplifies installation and connectivity by automatically detecting and configuring the appropriate settings.

The AT-9000/28 employs advanced switching technologies, such as IEEE 802.1Q VLAN tagging, which enables the segregation of traffic for improved security and performance. This feature is crucial for businesses that require data isolation between different departments or user groups. In addition, the switch supports quality of service (QoS) protocols, allowing for traffic prioritization. This is particularly beneficial for organizations that handle multimedia applications or VoIP services that demand reliable bandwidth.

Another significant characteristic of the AT-9000/28 is its support for port mirroring. This capability is essential for network monitoring and troubleshooting, as it allows administrators to track and analyze network traffic efficiently. Furthermore, the switch supports multiple user authentication methods, including RADIUS and TACACS+, thus enhancing network security.

The AT-9000/28 is built with energy efficiency in mind, featuring Energy Efficient Ethernet (EEE) technology. This reduces power consumption during periods of low traffic without compromising performance, which aids in lowering overall operational costs.

In terms of management, the AT-9000/28 offers versatile management options, including a web-based GUI, Command Line Interface (CLI), and SNMP support. This flexibility enables network administrators to configure, monitor, and troubleshoot the switch easily.

Overall, the Allied Telesis AT-9000/28 is a reliable switch well-suited for a variety of network environments. Its combination of performance, security features, and energy efficiency makes it an excellent choice for organizations looking to optimize their network infrastructure. With robust capabilities and advanced technologies, the AT-9000/28 stands out as a valuable addition to any networking setup.