AT-GS900/8PS Gigabit Ethernet POE+ Switch AT-GS900/8PS Installation Guide PN 613-001687 Rev.
Copyright © 2012 Allied Telesis, Inc. All rights reserved. No part of this publication may be reproduced without prior written permission from Allied Telesis, Inc. Allied Telesis 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.
Electrical Safety and Emissions Standards This product meets the following standards. U.S. Federal Communications Commission Radiated Energy Note: This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Translated Safety Statements Important: The indicates that a translation of the safety statement is available in a PDF document titled “Translated Safety Statements” posted on the Allied Telesis website at www.alliedtelesis.com.
Contents Preface ................................................................................................................................................................................11 Symbol Conventions .....................................................................................................................................................12 Contacting Allied Telesis ......................................................................................................................
Contents Slow Network Performance ...........................................................................................................................................49 LINK/ACT LED Intermittently Blinking ...........................................................................................................................49 Powered Device Not Receiving Power ..........................................................................................................................
Figures Figure 1. AT-GS900/8PS Front Panel .................................................................................................................................18 Figure 2. Back Panel ...........................................................................................................................................................18 Figure 3. AT-GS900/8PS LEDs .................................................................................................................................
Figures 8
Tables Table 1. Twisted Pair Cable Specifications for the AT-GS900/8PS ...................................................................................19 Table 2. System LED ..........................................................................................................................................................22 Table 3. Power over Ethernet LEDs ...................................................................................................................................22 Table 4.
Tables 10
Preface This guide contains the installation instructions for the AT-GS900/8PS Gigabit Ethernet POE+ Switch.
Preface Symbol Conventions This document uses the following conventions: Note Notes provide additional information. Caution Cautions inform you that performing or omitting a specific action may result in equipment damage or loss of data. Warning Warnings inform you that performing or omitting a specific action may result in bodily injury. Warning Warnings inform you that an eye and skin hazard exists due to the presence of a Class 1 laser device.
AT-GS900/8PS Switch Installation Guide Contacting Allied Telesis If you need assistance with this product, you may contact Allied Telesis technical support by going to the Support & Services section of the Allied Telesis web site at www.alliedtelesis.com/support.
Preface 14
Chapter 1 Overview This chapter describes the AT-GS900/8PS Layer 2 Gigabit Ethernet Switch. The sections in the chapter are.
Chapter 1: Overview Features Here are the hardware features of the AT-GS900/8PS Gigabit Ethernet Switch. General Supports 18 Gbps non-blocking switch fabric Transparent to VLAN packets Twisted Pair Ports 8 ports 10Base-TX, 100Base-T and 1000Base-T compliant IEEE 802.3u Auto-Negotiation compliant Auto-MDI/MDIX RJ-45 connectors 100 meters (328 feet) maximum operating distance IEEE 802.
AT-GS900/8PS Switch Installation Guide Power over Ethernet Installation Options Power Conservation MAC Address Table Dimensions Operating Conditions PoE and PoE+ supported on the 10/100/1000Base-T ports 1 - 4 on the AT-GS900/8PS switch Supports powered device classes 0 through 4 Max power limit of 75 watts for the switch Max power limit of 30 watts per port Port prioritization Alternative A Mode 19-inch equipment rack Desk or tabletop Wall High-efficiency internal
Chapter 1: Overview Front and Back Panels Figure 1 illustrates the front panel of the AT-GS900/8PS Gigabit Ethernet Switch. AT-GS900/8 System PoE Limit LEDs Port LEDs PoE LEDs 10/100/1000Base-T Twisted Pair Ports Figure 1. AT-GS900/8PS Front Panel The switch back panel is illustrated in Figure 2. Figure 2.
AT-GS900/8PS Switch Installation Guide Twisted Pair Ports The AT-GS900/8PS Gigabit Ethernet Switch features 8 twisted pair ports, respectively, that are 10Base-T, 100Base-TX, and 1000Base-T compliant. The port speeds and duplex modes are determined automatically with IEEE 802.3u Auto-Negotiation. The ports have a maximum operating distance of 100 m (328 feet). The twisted pair ports feature 8-pin RJ-45 connectors. For the port pinouts, refer to “Connectors and Port Pinouts” on page 55.
Chapter 1: Overview Auto-Negotiation Mode Each AT-GS900/8PS switch port is configured for Auto-Negotiation mode which determines the speed and duplex mode. Each end-node connected to a twisted-pair port should also be configured for Auto-Negotiation mode. This insures that the speed and duplex mode is matched on each end. Note If an end-node connected to a AT-GS900/8PS twisted-pair port is set to a fixed speed and duplex, a speed and duplex mismatch may occur which can cause a reduction in the data flow.
AT-GS900/8PS Switch Installation Guide SFP Port The AT-GS900/8PS features one SFP uplink port (Port 9). This port is capable of supporting one 1000SX/LX SFP module. Refer to the ATGS900/8PS product data sheet for information concerning the specific SFP models supported and fiber cable specifications. See “Contacting Allied Telesis” on page 13 for a link to the AT-GS900/8PS product page.
Chapter 1: Overview LEDs The System, PoE, 10/100/1000Base-T and SFP LEDs are shown in Figure 3. Figure 3. AT-GS900/8PS LEDs Table 2 describes the system LED. Table 2. System LED LED State Solid Green POWER Off Description The input AC power is within the normal operating range. The switch is not receiving AC power. Table 3 describes the Power over Ethernet (PoE) LEDs: Table 3. Power over Ethernet LEDs LED State Solid Green PoE Blinking Green OFF 22 Description Power is supplied to the PD.
AT-GS900/8PS Switch Installation Guide Table 3. Power over Ethernet LEDs Solid Green PoE Limit Blinking Green Off Total PoE delivered power is between 70 W and 75 W (Guard Band). While in this state, demand for PoE power to any additional PoE ports will be denied. The demand for PoE Power has exceeded the max PoE power limit (75 W). The low priority port(s) are disconnected as required so the total PoE power delivered is less than 75 W. Total PoE power delivered is below 70W.
Chapter 1: Overview Table 5 describes the LEDs for the SFP slots. Table 5. SFP Slot LEDs LED L/A (link/ activity) State Description Solid Green The SFP transceiver has established a link with a network device, but is not transmitting or receiving network packets. Blinking Green Off 24 The SFP transceiver is transmitting or receiving network packets. The port on the SFP transceiver has not established a link with an end-node or the transceiver slot is empty.
AT-GS900/8PS Switch Installation Guide Power Over Ethernet The AT-GS900/8PS switch features Power over Ethernet (PoE) only on ports 1 - 4. PoE is used to supply power to network devices over the same twisted pair cables that carry the network traffic. The main advantage of PoE is that it can make it easier to install a network. The selection of a location for a network device is often limited by whether there is a power source nearby.
Chapter 1: Overview PoE Powered Device Classes Powered devices are grouped into the five classes listed in Table 6. The classes are based on the amount of power the devices require. The switches support all five classes. Table 6. IEEE Powered Device Classes PoE Power Budget Class Maximum Power Output from a Switch Port 0 15.4W 0.44W to 12.95W 1 4.0W 0.44W to 3.84W 2 7.0W 3.84W to 6.49W 3 15.4W 6.49W to 12.95W 4 30.0W 12.95W to 25.
AT-GS900/8PS Switch Installation Guide PoE Port Prioritization If the power requirements of the powered devices exceed the switch’s power budget (75 W), the switch denies power to one or more PoE ports based on a process called port prioritization. The port priority is based on the port number with the highest priority assigned to port 1 and the lowest priority assigned to port 4.
Chapter 1: Overview Note To reset a blinking PoE port LED, see “Resetting Blinking PoE Port LED” on page 51. Note In addition, a blinking POE LED can indicate that a PoE port has a short circuit.
AT-GS900/8PS Switch Installation Guide Wiring Implementation The IEEE 802.3af standard defines two methods by which a PSE, such as the switch, can transmit DC power over twisted pair cables to PDs. These methods, known as Alternatives A and B, identify the wire strands the switch should use when sending DC power to a PD. The AT-GS900/8PS switch delivers power using Alternative A. Twisted pair cabling typically consists of eight strands.
Chapter 1: Overview Power Supply The switch has an internal power supply with a single AC power supply socket on the back panel and autoswitch AC inputs. To power the switch on or off, connect or disconnect the power cord provided with the switch. A power cord is supplied with the switch. Note For the power requirements, refer to the “Power Specifications” on page 53.
Chapter 2 Installation This chapter contains the following sections: “Reviewing Safety Precautions” on page 32 “Selecting a Site for the Switch” on page 34 “Unpacking the Switch” on page 35 “Installing the Switch on a Desktop” on page 37 “Installing the Switch in an Equipment Rack” on page 38 “Installing the Switch on a Wall” on page 40 “Installing Optional SFP Transceiver” on page 43 “Cabling the Switch” on page 45 “Powering On the Switch” on page 46 31
Reviewing Safety Precautions Please review the following safety precautions before you begin to install the chassis or any of its components. Note The indicates that a translation of the safety statement is available in a PDF document titled Translated Safety Statements. See “Contacting Allied Telesis” on page 13 Warning 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.
AT-GS900/8PS Switch Installation Guide Operating Temperature. This product is designed for a maximum ambient temperature of 40° degrees C. E7 All Countries: Install product in accordance with local and National Electrical Codes. E8 Circuit Overloading: Consideration should be given to the connection of the equipment to the supply circuit and the effect that overloading of circuits might have on overcurrent protection and supply wiring.
Chapter 2: Installation Selecting a Site for the Switch Observe the following requirements when choosing a site for your switch: If you are installing the switch on a table, verify that the table is level and secure. The power outlet for the switch should be located near the unit and should be easily accessible. The site should provide for easy access to the ports on the front of the switch. This will make it easier for you to connect and disconnect cables, as well as view the switch’s LEDs.
AT-GS900/8PS Switch Installation Guide Unpacking the Switch To unpack the switch, perform the following procedure: 1. Remove all of the components from the shipping package. Note Store the packaging material in a safe location. You must use the original shipping material if you need to return the unit to Allied Telesis. 2. Place the switch on a level, secure surface.
Chapter 2: Installation 3. Verify that the shipping container includes the AT-GS900/8PS Switch and the items shown below in Figure 4.
AT-GS900/8PS Switch Installation Guide Installing the Switch on a Desktop You may install the AT-GS900/8PS Switch on a desktop or in a standard 19-inch equipment rack. To install the switch in a rack, refer to “Installing the Switch in an Equipment Rack” on page 38. To place the switch on a desktop, perform the following procedure: 1. Remove all equipment from the package and store the packaging material in a safe place. 2. Turn the switch over and place it on a table. 3.
Chapter 2: Installation Installing the Switch in an Equipment Rack To install the switch in a standard 19-inch equipment rack, perform the following procedure: 1. If the rubber feet are attached to the bottom of the switch, remove them using a flat-head screwdriver. 2. Attach the two rack mount brackets to the sides of the switch using the eight bracket screws that are provided. There are four possible positions in which the brackets may be installed. Figure 6.
AT-GS900/8PS Switch Installation Guide Figure 7. Mounting the Switch in an Equipment Rack 4. Go to “Installing Optional SFP Transceiver” on page 43 or “Cabling the Switch” on page 45.
Chapter 2: Installation Installing the Switch on a Wall To install the switch on a wall, perform the following procedure: 1. Turn the switch over and place it on a table. 2. If the rubber feet are attached to the bottom of the switch, remove them using a flat-head screwdriver. 3. Orient the brackets against the sides of the switch as shown in Figure 8, and secure them to the unit with the eight bracket screws included with the switch. Figure 8. Attaching the Brackets to Install the Switch on a Wall 4.
AT-GS900/8PS Switch Installation Guide Figure 9. Marking the Screw Hole Locations 5. Install the four plastic anchors included with the switch into the wall, at the locations marked in the previous step. The anchors require 0.635 mm (0.25 in.) holes. 6. While another person holds the switch at the wall location, secure it to the wall using the four wall mount screws and washers that are provided. See Figure 10 on page 42.
Chapter 2: Installation Figure 10. Securing the Switch to the Wall 7. Go to “Installing Optional SFP Transceiver” on page 43 or “Cabling the Switch” on page 45.
AT-GS900/8PS Switch Installation Guide Installing Optional SFP Transceiver To install an SFP transceiver, perform the following procedure: Note You should always install the transceiver before connecting the fiber optic cables to it. Note The transceiver can be hot-swapped; you do not need to power off the switch to install a transceiver. However, always remove the cables from the transceiver before removing it. 1.
Chapter 2: Installation 4. With the handle on the transceiver oriented towards the top of the switch, slide the transceiver into the SFP slot until it clicks into place. See Figure 12 Figure 12. Inserting the SFP 5. Verify that the handle on the transceiver is in the upright position or oriented towards the top of the switch. This secures the transceiver and prevents it from being dislodged from the slot. Note SFP transceivers are dust sensitive.
AT-GS900/8PS Switch Installation Guide Cabling the Switch Observe the following guidelines when connecting twisted pair and fiber optic cables to the ports on the switch: The cable specifications for the twisted pair ports are given in Table 1 on page 19 Refer to the cable specifications are included in the SFP module data sheet for the SFP module installed. The cable connector should fit snugly into the port on the switch. The tab on the connector should lock the connector into place.
Chapter 2: Installation Powering On the Switch To power on the switch, perform the following procedure: 1. Plug the power cord into the AC power connector on the back of the switch, as shown in Figure 13. Figure 13. Plugging in the AC Power Cord 2. Plug the other end of the power cord into a wall outlet. Warning: Power cord is used as a disconnection device. To deenergize equipment, disconnect the power cord. E3 Pluggable Equipment.
AT-GS900/8PS Switch Installation Guide Chapter 3 Troubleshooting This chapter contains information on how to troubleshoot the switch if a problem occurs.
Chapter 3: Troubleshooting the following: Verify that the network device connected to the twisted pair port is powered on and is operating properly. Verify that the twisted pair cable is securely connected to the switch port and to the port on the remote network device. Verify that the port is connected to the correct twisted pair cable. This is to eliminate the possibility that the port is connected to the wrong network device, such as a powered off device.
AT-GS900/8PS Switch Installation Guide 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. If the remote network device is a managed device, use its management firmware to determine whether its port is enabled. Test the attenuation on the fiber optic cable with a fiber optic tester to determine whether the optical signal is too weak (sensitivity) or too strong (maximum input power).
Chapter 3: Troubleshooting Powered Device Not Receiving Power Problem: Port’s PoE LED is OFF Solutions: If a powered device (PD) is not receiving power from the AT-GS900/8PS switch and the port’s PoE LED is off, do the following: Verify that the AT-GS900/8PS is has AC power and the Power LED is on. Verify that the port’s link L/A LED is either solid or blinking green. If the L/A LED is off, do the following: - Check the Ethernet connections between the AT-GS900/8PS port and the powered device.
AT-GS900/8PS Switch Installation Guide Resetting Blinking PoE Port LED To reset a blinking PoE port LED, perform the following steps: 1. Turn the switch power off by disconnecting the AC power cord. 2. If the total PoE power from all the powered devices connected to the switch is greater than 70 W, reduce the total PoE load until it is less than 70 W. 3. If a powered device connected to a specific port requires more than 30 W, disconnect it from the switch. 4.
Chapter 3: Troubleshooting 52
AT-GS900/8PS Switch Installation Guide Appendix A Technical Specifications The following specifications are for the AT-GS950/8 Gigabit Ethernet PoE switch. Physical Specifications Table 7. Physical Specifications Dimensions (H x W x D) 280 mm x 180 mm x 44 mm (11.0 in x 7.1 in x 1.7 in) Weight 1.52 kg (3.35 lbs) Environmental Specifications Table 8.
Appendix A: Technical Specifications PoE Specifications Table 10. PoE Specifications Ports Ports 1, 2, 3, 4 Port Priority: Port 1 (Highest) and Port 4 (Lowest) Standard Supports both IEEE 802.3at and IEEE 802.3af Mode Alternate A Max Power Limit per port 30W Max Power Limit 75W PoE Guard Band 70W to 75 W Note For an explanation of these PoE specifications, see “Power Over Ethernet” on page 25. Safety and Electromagnetic Emissions Certifications Table 11.
AT-GS900/8PS Switch Installation Guide Connectors and Port Pinouts This section lists the connectors and connector pinouts. Figure 14 illustrates the pin layout for an RJ-45 connector and port. Figure 14. RJ-45 Connector and Port Pin Layout Table 12 lists the RJ-45 pin signals when a twisted pair port is operating in the MDI configuration. Table 12.
Appendix A: Technical Specifications Table 14 lists the RJ-45 connector pins and their signals when a 1000Base-T port is operating at 1000 Mbps. Table 14.
