Allied Telesis 8PS Switch User Manual
Contents
1. Maximum Power Class Output from a Switch PD Power Range 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 5W The AT GS900 8PS switch has a power budget of 75 watts This is the maximum amount of power the switch can provide at one time to the powered devices The sum of the power requirements of each of the PoE devices connected to the switch determines the maximum number of devices that the switch can support at one time So long as the total power requirements of the powered devices is less than the power budget of the switch the switch can supply power to all of the devices But if the total power requirements exceed the power budget the switch denies power to one or more ports using a mechanism referred to as port prioritization To determine whether the power requirements of the PoE devices you plan to connect to the switch exceed its power budget refer to the documentation for the power requirement of each device and add the requirements together The switch should be able to power all of the devices simultaneously as long as the total is below its power budget If the total exceeds the available power budget you should consider reducing the number of PoE devices so that all of the devices receive power Otherwise the switch powers a subset of the devices based on port prioritization The switch can handle different power requirements on different2. O O Features on page 16 Front and Back Panels on page 18 Twisted Pair Ports on page 19 SFP Port on page 21 LEDs on page 22 Power Over Ethernet on page 25 Power Supply on page 30 Chapter 1 Overview Features General Twisted Pair Ports LEDs PoE Ports SFP Slots Here are the hardware features of the AT GS900 8PS Gigabit Ethernet Switch a Supports 18 Gbps non blocking switch fabric n Transparent to VLAN packets a Support for jumbo frames up to 9216 bytes at 100 forwarding rate o 8ports n 10Base TX 100Base T and 1000Base T compliant o IEEE 802 3u Auto Negotiation compliant o Auto MDI MDIX o RJ 45 connectors n 100 meters 328 feet maximum operating distance o IEEE 802 3x flow control in 10 100Base TX full duplex operation o IEEE 802 3x back pressure in 10 100Base TX half duplex operation o lEEE803 3z 1000Base T flow control a Speed and link activity LEDs for the twisted pair ports o Link activity LEDs for the SFP slots n PoE and PoE Limit LEDs o Power LED o PoE support for ports 1 4 n Class 3 IEEE 802 af supported on four ports n Class 4 IEEE 802 at supported on two ports a One SFP slot a Support 1000Base SX LX transceivers Note SFP transceivers must be purchased separately For a list of supported transceivers contact your Allied Telesis distributor or reseller Power over Ethernet Installation Options
3. 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 Attach the four rubber feet to the bottom of the switch as shown in Figure 5 9 vr z ES 000 OE Onm 000 0 0000609 Omna momo moo E z0 00000 i ee 299 En jol m9 de e YAMS 304 19410413 VGO S d8 006SD LV Figure 5 Attaching the Rubber Feet 4 Turn the switch over again and place it on a flat secure surface such as a desk or table leaving ample space around the unit for ventilation 5 Go to Installing Optional SFP Transceiver on page 43 or Cabling the Switch on page 45 37 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 Attaching the Rack Mount Brackets to the Switch 3 Mount the switch in a standard 19 inch equipment rack using four eq
4. 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 EE EE EE IE N EE EE EE EE EE EE EN 11 SYMbDOL kere Le ORR EE EE N EE EE N 12 Contacting Allled TelesiS viii Aa 13 Chapter 1 OVerview Ee na si inEi 15 Features iis teehee Tesi se SEE ee sea estou Ee EE Weg Ae a Pee Me eed een GEE dn ee oe hee a ee eet Mien on 16 Generale MA ER N A Ee Za LE AE EE E gs SAM EA SA 16 Twisted Pair eli EE EL N ON ade 16 UE DS ME RE AA EO EE EO ER EE EE EGO HE 16 POE Portes stiri Ee N ee ei ni tardo Es 16 Aas NN 16 ee da ER EN id ll a 17 Installation Options RO N OE ER N RE EE N N EE OE 17 de idee Le AE OE OR EE EER KO tap asa 17 MAC Address Table iii EE EE ONE 17 Bleek scouts Seon A N EG AE EE EE OE EI EE AE 17 Operating Conditions AE EE EE OE A ER EE EE OE EE 17 Frontand Back Panels ER ee ccc tee DER Ueda aac ae ek OR nie DE ee RO ee RR ee eb BE ee eed as tele ES AE Ee 18 Twisted Pal er AE N dat N OE EI EE EE EO OR EE ER EK 19 Cable SpecCifiCations ER AO EE OE EO ER EE OE N 19 MDI MDI X lee EE EE RE ER EE EE EO EE OE 19 Auto Negotiation Mode RE EE EE ER EE EE EE EE OO ohne EE 20 Flow Controlsand sie dir ie RA AE IE OE OO RA EE EO IR RE 20 SFP ae EE IR HT RE RO EE EE EE N EE N EN 21 HEB RE ER ee ais ec N e o NE ER DEE 22 dode AA EE A N N N 25 PoE SStandardS RS OE OE EE ER ER EE EL N EE EE EO OE
5. 30 W This can be verified by reviewing the device s documentation or data sheet The demand for PoE power from the power device connected to the port is greater than 30 W The maximum amount of power any port can supply by itself is 30 W More than 30 W exceeds the port s ability to deliver POE power a The total demand for PoE power on all ports is exceeding the 75 W maximum PoE power limit of the switch This condition occurs when you connect an additional power device to a switch port and the switch attempts to deliver more than the maximum PoE power limit for the switch When this situation occurs the lowest priority port s is denied PoE power so the combined PoE power delivered to all of the power devices remains under 75 W 50 AT GS900 8PS Switch Installation Guide Resetting Blinking PoE Port LED To reset a blinking PoE port LED perform the following steps de 2 Turn the switch power off by disconnecting the AC power cord 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 If a powered device connected to a specific port requires more than 30 W disconnect it from the switch Turn on the switch by re connecting the AC power cord 51 Chapter 3 Troubleshooting 52 AT GS900 8PS Switch Installation Guide Appendix A Technical Specifications The following specifications are for the AT GS950 8 Gigab
6. 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 Cable The cable requirements for the ports on the AT GS900 8PS are listed in Specifications Table 1 Table 1 Twisted Pair Cable Specifications for the AT GS900 8PS Cable Type 10Mbps 100Mbps 1000Mbps Standard TIA ElA 568 B Yes Yes No compliant Category 3 shielded or unshielded cabling with 100 ohm impedance and a frequency of 16 MHz Standard TIA EIA 568 A Yes Yes Yes compliant Category 5 or TIA ElA 568 B compliant Enhanced Category 5 Cat 5e shielded or unshielded cabling with 100 ohm impedance and a frequency of 100 MHz Standard TIA ElA 568 B Yes Yes Yes compliant Category 6 or 6a shielded cabling Note The twisted pair ports on the switch feature auto MDI when operating at 10 100 or 1000 Mbps A port is configured as MDI or MDI X when it is connected to an end node Consequently you can use a straight through or cross over twisted pair cable when connecting any type of network device to a port on the switch MDI MDI X The ports feature auto MDI which autom
7. Power Conservation MAC Address Table Dimensions Operating Conditions AT GS900 8PS Switch Installation Guide 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 power supply Power scaling based on traffic loads on ports operating at 1000 Mbps and cable length port power scaling not available at 10 or 100 Mbps Power shutdown sleep mode on unconnected ports Up to 8 KB Automatic learning and aging Width 280 mm 11 0 in Depth 180 mm 7 1 in Height 44 mm 1 7 in Operating temperature range of 0 C to 40 C 32 F to 104 F Operating humidity range of 5 to 90 non condensing Storage humidity range of 5 to 95 non condensing Chapter 1 Overview Front and Back Panels Figure 1 illustrates the front panel of the AT GS900 8PS Gigabit Ethernet Switch AT GS900 8 1 2 3 4 5 6 7 s System port PoE 10 100 1000Base T 1000M ir e LEDs LEDs Twisted Pair Ports SFP Slot Figure 1 AT GS900 8PS Front Panel The switch back panel is illustrated in Figure 2 st a gt 100 240VAC Figure 2 Back Panel AT GS900 8PS Switch Installation Guide Twisted Pair Ports The AT
8. nodes connected to the twisted pair ports should be configured for Auto Negotiation to insure that both the speed and duplex modes are matched on each end 45 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 Plug the other end of the power cord into a wall outlet A Warning Power cord is used as a disconnection device To de energize equipment disconnect the power cord ar E3 Pluggable Equipment The socket outlet shall be installed near the equipment and shall be easily accessible ar E5 3 Verify that the POWER LED is green If the LED is OFF refer to Chapter 3 Troubleshooting on page 47 The switch is now powered on and ready for network operations 46 AT GS900 8PS Switch Installation Guide Chapter 3 Troubleshooting This chapter contains information on how to troubleshoot the switch if a problem occurs The following problems are addressed o Power LED OFF o Twisted Pair Port LINK ACT LED Off a SFP Port LINK ACT LED Off on page 48 a Slow Network Performance on page 49 o LINK ACT LED Intermittently Blinking on page 49 a Powered Device Not Receiving Power on page 50 o Resetting Blinking PoE Port LED on page 51 Note For further assistance
9. please contact Allied Telesis Technical Support at www alliedtelesis com support Power LED OFF Problem The POWER LED on the front of the switch is off Solutions The unit is not receiving power Try the following n Verify that the power cord is securely connected to the power source and to the AC connector on the back panel of the switch n Verify that the power outlet has power by connecting another device to it o Try connecting the unit to another power source o Try a different power cord o Verify that the voltage from the power source is within the required levels for your region Twisted Pair Port LINK ACT LED Off Problem A twisted pair port on the switch is connected to a network device but the port s LINK ACT LED is off Solutions The port is unable to establish a link to a network device Try 47 Chapter 3 Troubleshooting the following O 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 Try connecting another network device to the twisted pair port with a different cable If the twisted pair port is able to establish
10. ports This enables you to connect different classes of PoE equipment to the PoE ports on the switch PoE Port Prioritization PoE Guard Band Exceeding PoE Power Budget AT GS900 8PS Switch Installation Guide 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 For example this occurs if your AT GS900 8PS switch is powered off when you connect four powered devices to the PoE ports which require more than 75 W of combined power When you turn the power on to the AT GS900 8PS switch the lowest priority PoE port s are denied power so that the total POE power supplied does not exceed the 75 W power budget You may 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 POE power Should the demands of the devices exceed the available capacity of the switch in the distribution of PoE power will go to those devices connected to the highest priority ports The POE Guard Band is defined as the range between 70 and 75 Watts of the total POE power supplied to the switch ports This power band is reached when the total PoE power requirements of all of the powered device
11. switch continues to issue PAUSE frames until it is ready to receive data again from the end node This is referred to as flow control A twisted pair port operating at half duplex mode stops its end node from transmitting data by forcing a collision A collision on an Ethernet network occurs when two end nodes attempt to transmit data using the same data link at the same time A collision causes the end nodes to momentarily stop sending data When a switch port has received more data than it can process it needs to temporarily stop its end node from transmitting data The port does this by forcing a collision on the data link which stops the opposite end node from transmitting any more data After the switch is ready to receive data again the switch stops forcing collisions This is referred to as back pressure SFP Port AT GS900 8PS Switch Installation Guide 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 AT GS900 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 21 22 Chapter 1 Overview LEDs The System PoE 10 100 1000Base T and SFP LEDs are shown in Bl es Gigabit Ethemet PoE Switch gt iem o E Figure 3 1 3 6 7 0000 0 s eue yd 0000 o CD mn Owo PELMTO O O O
12. the power requirements refer to the Power Specifications on page 53 Chapter 2 Installation This chapter contains the following sections a Reviewing Safety Precautions on page 32 o Selecting a Site for the Switch on page 34 a Unpacking the Switch on page 35 a Installing the Switch on a Desktop on page 37 a Installing the Switch in an Equipment Rack on page 38 o Installing the Switch on a Wall on page 40 o Installing Optional SFP Transceiver on page 43 o Cabling the Switch on page 45 o 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 A Note The a 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 user serviceable parts inside This unit contains hazardous voltages and should only be opened by a trained and qualified technician To avoid the possibility of electric shock disconnect electric power to the product before connecting or disconnecting the cables a E1 Warning Do not work on equipment or cables during periods of lightning activity ar E2 Warning Power cord is used as a disconnection device To de ener
13. 50 TUV T Mark UL 60950 cULus C TICK CE EU RoHS compliant Environmental Compliance WEEE China RoHS compliant Quality and Reliability 800 000 Hours MTBF 54 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 MDI Pin Signals 10Base T or 100Base TX Pin Signal 1 TX 2 TX 3 RX 6 RX Table 13 lists the RJ 45 port pin signals when a twisted pair port is operating in the MDI X configuration Table 13 MDI X Pin Signals 10Base T or 100Base TX Pin Signal 1 RX 2 RX 3 TX 6 TX 55 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 RJ 45 1000Base T Connector Pinouts Pin Pair Signal 1 1 TX and RX 1 TX and RX TX and RX TX and RX TX and RX TX and RX TX and RX TX and RX 0 N OOP OJN B Bl N OO N 56
14. E EE 24 IEEE Powered Device ClasSeS niin ed Eise es dee ges ee Ge ae 26 Physical Specifications iii EE RE OE N EE EE OE EE DR N 53 Environmental Specification issie ees lees eek esse des ede cie 53 Power SPECHICATIOMS ER EE OE EN AE 53 POE SpecificatiOnS even EN ARE EE io ai EE EE EE N N N 54 Safety and Electromagnetic Emissions Certifications ese see ee ee ee ee ee Re ee Ee AR ee Ge Re ee ee ee ee ee Re ee ee ee ee 54 MDI Pin Signals 10Base T or 100Base TX ee ee ee ee Ee AR ee ee ono nono conan nn ee Ge Ank nn nn nan ee ee ee ee ee eke ee ee 55 MDI X Pin Signals 10Base T or 100Base TX ee ee ee ee ee Re ee ee Re ee Ee AR Ke ee Ge nn ee Ee ee eke ee ee ee ee ee ee eke ee ee 55 RJ 45 1000Base T Connector Pinouts iese ee aeia ee Re ee ee GR aaa ee ee ee S ee ee eke ee ee 56 Tables Preface This guide contains the installation instructions for the AT GS900 8PS Gigabit Ethernet POE Switch This preface contains the following sections Og Symbol Conventions on page 12 a Contacting Allied Telesis on page 13 Preface Symbol Conventions This document uses the following conventions Note Notes provide additional information A Caution Cautions inform you that performing or omitting a specific action may result in equipment damage or loss of data A Warning Warnings inform you that performing or omitting a specific action may result in bodily injury A Warning Wa
15. EE ns 25 PoE Powered Device Ela seS abses si sed ar ese De aaa is is as Sine ene 26 POE PowerBudget NA EE n Ee AE te ia N SS id oidos ed es 26 PoE Port Prioritizati fssi EE EA ee dre ri dc DEE 27 else dels De AR EE EE ER DE EE IE HE OO LES ER ER N 27 Exceeding PoE Power Budget EE iets etc a io Soe A At 27 Wiring Implementar 29 ede AR IE N EE RO RE EE EE EE eaiaa 30 Ghapter 2 Installation s a RE A oe AR GA MES EER EE ee tee RE ee ee 31 Reviewing Safety Precautions AR EE EE RO N N 32 Selecting a Site for ui ev nani adn tenen 34 Unpacking the Switch EE ER EE OE OE EE RE EE ER OE EE 35 Installing the Switch Oni a Desktop ER RE EE EE OO EE ER a aE 37 Installing the Switch in an Equipment RaCK iese sesse ees se ek ee ee ee ee AR ee Ge Re ee ee ee ke ee ee GR ee ee ke ee ee ee ee ee ke ee ee 38 Installing the Switch on a Wall ee ee Ee ee ee Re Ee AR ee GR Re ee ee Re ee Re ee ee dnui ee ee ee ee eek ke ee ee Re ee ee ee ke ee 40 Installing Optional SEP Transceiver i s ske ER ee Aid 43 ook Es ie EE EE EN EE RE RE EE OR EE NE ae 45 Powering On the ie ER EE EE EE OE ER EE EE OE bes 46 Ghapter 3 Troubleshooting 2 2 5 si RE Eg DE EE RE e ea N ee Ee ieee Ee 47 Power LEDO RF Stat do bs AE sade 47 Twisted Pair Port LINK ACT LED Of ees se ee ee ee ee ee ee ee ee ee ek rn cnn Re ee ee ee ee Ke ee Gee ee ee ee eek ke ee ee ek ee ee Re ee ee ee ee ee ee 47 SFP Pot LINK AG T E nie EER N RE N EA N EE EE OE RE HR 48 Contents Slow Network Perf
16. O Os Poon O POOFF POW RO O O O O Os 24 6 8 2414 Figure 3 AT GS900 8PS LEDs Table 2 describes the system LED Table 2 System LED LED State Description Solid Green The input AC power is within the normal POWER operating range Off The switch is not receiving AC power Table 3 describes the Power over Ethernet PoE LEDs Table 3 Power over Ethernet LEDs LED State Description Solid Green Power is supplied to the PD POE Blinking Port is overloaded short circuited Green OFF Power is not supplied to the PD AT GS900 8PS Switch Installation Guide Table 3 Power over Ethernet LEDs Total POE delivered power is between 70 W and 75 W Guard Band While in this state Solid Green demand for POE power to any additional POE ports will be denied POE Limit NN Blinking The demand for PoE Power has exceeded Green 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 Off Total PoE power delivered is below 70W Table 4 describes the LEDs for the 10 100 1000Base T ports Table 4 10 100 1000Base T Port LEDs LED State Description Steady The port has established a link to a network Green device L A link TE e 7 activity Blinking The port is transmitting or receiving network Green packets Off The port has not established a link with a n
17. a link then the problem is with the cable or the other network device Verify that the twisted pair cable does not exceed 100 meters 328 feet Verify that you are using the appropriate category of twisted pair cable Category 3 or better for 10 Mbps operation and Category 5 and Category 5E for 100 and 1000 Mbps operation Note A 1000Base connection may require five to ten seconds to establish a link SFP Port LINK ACT LED Off 48 Problem The LINK ACT LED for an SFP transceiver is off Solutions The fiber optic port on the transceiver is unable to establish a link to a network device Try the following O Verify that the network device connected to the fiber optic port is operating properly Verify that the fiber optic cable is securely connected to the port on the media converter channel and to the port on the remote network device Check that the SFP module is fully inserted in the slot Verify that the operating specifications of the fiber optic ports on the SFP transceiver and the remote network device are compatible Verify that the correct type of fiber optic cabling is being used Verify that the port is connected to the correct fiber optic cable This is to eliminate the possibility that the port is connected to the wrong remote network device such as a powered off device Try connecting another network device to the fiber optic port using AT GS900 8PS Switch Installation Guide a dif
18. atically configures the ports as Mode MD or MDI X This feature allows you to use straight through or cross over twisted pair cables when connecting to the end nodes Chapter 1 Overview Auto Negotiation Mode Flow Control and 20 Back Pressure 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 When two end nodes are set to different speeds an Ethernet switch with the slower data rate capability may randomly be flooded with more data than it can process and may need to signal the opposite end node to stop sending data until it is ready again How a switch signals an end node to stop transmitting data differs depending on the duplex mode of the Ethernet ports A port operating in full duplex mode uses PAUSE frames as specified in the IEEE 802 3x standard to momentarily stop the transmission of data from an end node Whenever a switch port wants an end node to stop transmitting data because it is being flooded by data it issues a PAUSE frame This frame instructs the end node to temporarily cease transmission The
19. be given to installing the equipment in an environment compatible with the manufacturer s maximum rated ambient temperature Tmra ar E35 Caution 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 ar E36 Warning 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 ar E37 33 Chapter 2 Installation Selecting a Site for the Switch 34 Observe the following requirements when choosing a site for your switch o If you plan to install the switch in an equipment rack verify that the rack is safely secured and will not tip over Devices in a rack should be installed starting at the bottom with the heavier devices near the bottom of the rack If you are installing the switch on a table verify that the table is level and secure The power outlet for the switch should be located near the unit and should be easily accessible The site should provide for easy access to the ports on the front of the switch This will make it easier for you to connect and disconnect cables as well as view the switch s LEDs Air flow around the unit and through its vents on the side and rear should not be restricted so that the switch can maintain adequate cooling Do no
20. ces nearby A device that provides PoE to other network devices is referred to as power sourcing equipment PSE The AT GS900 8PS switch acts as a PSE unit by adding DC power to the network cable thus functioning as a central power source for another network device 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 a device connected to a port is a powered device PoE ports 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 The AT GS900 8PS switch supports these PoE standards o POE IEEE 802 3af This standard provides up to 15 4 watts at the switch port to support powered devices that require up to 12 95 watts o PoE IEEE 802 3at This standard provides up to 30 0 watts at the switch port to support powered devices that require up to 25 5 watts 25 Chapter 1 Overview 26 PoE Powered Device Classes PoE Power Budget 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
21. etwork device Steady The operating speed of the port is 1000 Green Mbps do i f th is 10 or 100 speed Off The operating speed of the port is 10 or Mbps or the port has not established a link with a network device 23 Chapter 1 Overview 24 Table 5 describes the LEDs for the SFP slots Table 5 SFP Slot LEDs LED State Description Solid Green The SFP transceiver has established a link with a network device but is not transmitting or receiving network packets L A link cd Blinking The SFP transceiver is transmitting or Green receiving network packets The port on the SFP transceiver has not Off established a link with an end node or the transceiver slot is empty AT GS900 8PS Switch Installation Guide Power Over Ethernet PoE Standards 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 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 sour
22. ferent cable If the port is able to establish a link then the problem is with the cable or with the other network device o Ifthe remote network device is a managed device use its management firmware to determine whether its port is enabled n 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 Slow Network Performance Problem Network performance between a twisted pair port on the switch and a network device is slow Solution There might be a duplex mode mismatch between the port and the network device Since the AT GS900 8PS copper ports are always configured for Auto Negotiation they will default to half duplex mode if the corresponding link partner is configured for a fixed duplex mode This may slow the transfer of Ethernet traffic If this is the cause of the problem adjust the duplex mode of the port on the network device to Auto Negotiation so they can agree on the same duplex mode LINK ACT LED Intermittently Blinking Problem A port s LINK ACT LED is intermittently blinking Solutions The link between the port and the network device is intermittent Try the following a Connect another network device with a different cable to the port If the Link LED remains steady on then the problem is with the original cable or the network device o Ifthe problem is with an SFP transceiver check tha
23. friendly MV Allied Telesis AT GS900 8PS Gigabit Ethernet POE Switch AT GS900 8PS Gigabit Ethomot POE Switch LAS AC IS 0000 0 Or plo 20000 O2 0000 mo o 4 AT GS900 8PS Installation Guide PN 613 001687 Rev A AVE Allied Telesis Copyright O 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 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 This product meets the following standards U S Federal Communications Commission Radiated Energy Note This equipment has been tested and f
24. g POE LED can indicate that a PoE port has a short circuit 28 Wiring Implementation AT GS900 8PS Switch Installation Guide 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 With 10Base T and 100Base TX devices the strands connected to pins 1 2 3 and 6 on the RJ 45 connectors carry the network traffic while strands connected to pins 4 5 7 and 8 are unused With 1000Base T devices all eight strands are used to carry network data It takes four strands to deliver DC power to a PD With Alternative A the power is delivered on pins 1 2 3 and 6 With Alternative B the power is provided over the strands connected to pins 4 5 7 and 8 The ports on the AT GS900 8PS switch delivers the power using pins 1 2 3 and 6 which corresponds to Alternative A in the IEEE 802 3af standard 29 30 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
25. gize equipment disconnect the power cord ar E3 Warning Class 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 ar E4 Pluggable Equipment The socket outlet shall be installed near the equipment and shall be easily accessible a E5 Caution Air vents must not be blocked and must have free access to the room ambient air for cooling ar E6 32 AT GS900 8PS Switch Installation Guide Operating Temperature This product is designed for a maximum ambient temperature of 40 degrees C ar E7 All Countries Install product in accordance with local and National Electrical Codes a 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 Appropriate consideration of equipment nameplate ratings should be used when addressing this concern ar E21 Warning Mounting of the equipment in the rack should be such that a hazardous condition is not created due to uneven mechanical loading ar E25 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
26. he Rack Mount Brackets to the SwitCh ees ese ee ee ee ee ee Ke ee Ee eek ee ee Ke ee ee Ge ee rr 38 Mounting the Switch in an Equipment Rack iese ees se ee se ee ee ee ee Re ee Ee eek nn ee ee Re ee be eek ke ee ee ee rr 39 Attaching the Brackets to Install the Switch on a Wall ee ee ee RA AR ee ek ee ee ee Re Re ee ee Re nn ee ee ee ee ee 40 Marking the Screw Hole LocationS ees ee ee ee ee ee ee ke ee ee Re ee ee crono ee ee ee ee ee eke ee ee ee ee ee ee Re ee ee ee ee ee 41 Securing the Switch to the Walliese ER EE EE sede EE DE ENGER Ge ee de Ge cia 42 Removing the Dust Plug from an SFP Slot wo ee esse ee ee ee Re ee nono non Re ee ee cnn cnn cnn nn ee nan ee ee ee ke ee ee Ke ee ee 43 Inserting the SFP EA NE ei Mee EE ER taa sd 44 Plugging in the AC Power COMO cccocccccccconoonccnonononnonccon nn nn cnn AR ee Re ee enn eke ee ee Re ee Ee ek ee ee Ke ee ee 46 RJ 45 Connector and Port Pin LayOUt sessies esse eds see de ke Be ee ee 55 Figures Tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Twisted Pair Cable Specifications for the AT GS900 8PS ee ee ee ee ee ke ee Re ee ee ee ee Re ee ee ee ee 19 UNA AE OE OE OE EO OR EE OR NE EE EN ER N 22 Power over EthernmetLEDS EE is 22 10 100 1000Base T Port LEDS vini cided eens i eee KKLK Lee De Ge se Oe VER ek Ko Ve de Ke E 23 SEP SlOt MR PEG EE EE EE RE EN E
27. it 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 Ibs Environmental Specifications Table 8 Environmental Specifications Operating Temperature 0 C to 40 C 32 F to 113 F Storage Temperature 25 C to 70 C 13 F to 158 F Operating Humidity 5 to 90 non condensing Storage Humidity 5 to 95 non condensing Operating Altitude Up to 3 000 m 9 843 ft Range Power Specifications Table 9 Power Specifications Input Supply Voltage 100 240 VAC 50 60 Hz Rated Input Current 1 7A AT GS900 8PS 125 5 W 53 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 Safety and Electromagnetic Emissions Certifications FCC Part 15 Class A RFI Emissions ISPR 22 Class A EN55022 2006 A 2007 Class A Immunity EN55024 Electrical Safety EN609
28. ng the four wall mount screws and washers that are provided See Figure 10 on page 42 41 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 42 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 Remove the transceiver from its shipping container and store the packaging material in a safe location A Warning An SFP transceiver can be damaged by static electricity Be sure to observe all standard electrostatic discharge ESD precautions such as wearing an antistatic wrist strap to avoid damaging the transceiver 2 Remove the dust plug from an SFP slot See Figure 11 Figure 11 Removing the Dust Plug from an SFP Slot 3 Position the SFP transceiver with the label facing up 43 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 2408 Figure 12 Inserting
29. ormance EE ie ge Se dd Ge Ee ER ee Ee GED ee Ds DER es Re ge RR GED S ee Ds SR RS 49 LINK ACT LED Intermittently Blinking 0 0 0 eee se ee ee ek ee Ge ee ee ee ek rn ee Ge Re ee ee GR ee Gee eek ee ee Ke Gee ee ee ee Ke ee ee ee ee ee 49 Powered Device Not Receiving POWeETF ie ee ee ee ee AR RA ee ee AR Re Re ee AR Re Re ee ee Re RR RR RR ee ee ee Re ee ee ee ee ee ee ee ee ee ee 50 Resetting Blinking POE Port LED oia A in ee ed 51 Appendix A Technical Specifications ie ee RR EA AA AR GR ee ee AR Ee Re ee ee ee nn Re ee ee Re Re ee ee Re Re ee ee ee ee ee ee ee ee ede ee 53 Physical Specifications RE EE ER EE EE OE EE OE cascoeeeveceegeddedestneg eavunest 53 nies ee se lies Uie RE EE EE EE EE EE OE N OR EE 53 de Tee ide EE EE EE N eerie 53 POE SPEcIfICAIONS EO ER EE ME EE EE NAG OE OT EE 54 Safety and Electromagnetic Emissions CertificatiOn ees see ee se ee ee ee ee ee ee AR ee ee Re rro non ee ee Ge Re ee ee ee ee ee ke ee ee 54 Connectors and Port PiNouts 2 225 28 EV dies HEEN aa 55 Figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 AT GS900 8PS Front N OR EE EE EE ER E TEASTA EN ENEE 18 led RE EER OE EE EE RE ER EE OE EE 18 AT GSIO0 8PS LEDS EER ese ese Ge En ee RE a 22 AT GS900 8PS Switch Items GEES VERE PES KEES Ve de o Ge Ee eg Seed Pe 36 elegie da OE EE EE EER EE EE EE EE oew 37 Attaching t
30. ound 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 meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe A respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada RFI Emissions FCC Part 15 Class A CISPR 22 Class A EN55022 2006 A 2007 Class A Warning In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures Immunity EN55024 Electrical Safety ENG0950 TUV T Mark UL 60950 ULus C TICK CE Environmental Compliance EU RoHS compliant WEEE China RoHS compliant Translated Safety Statements Important The amp
31. rnings 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 amp Services section of the Allied Telesis web site at www alliedtelesis com support You can find links for the following services on this page o o 24 7 Online Support Enter our interactive support center to search for answers to your questions in our knowledge database check support tickets learn about RMAs and contact Allied Telesis technical experts USA and EMEA phone support Select the phone number that best fits your location and customer type Hardware warranty information Learn about Allied Telesis warranties and register your product online Replacement Services Submit a Return Merchandise Authorization RMA request via our interactive support center Documentation View the most recent installation guides user guides software release notes white papers and data sheets for your product Software Updates Download the latest software releases for your product O For sales or corporate contact information go to www alliedtelesis com purchase and select your region Preface 14 Chapter 1 Overview This chapter describes the AT GS900 8PS Layer 2 Gigabit Ethernet Switch The sections in the chapter are
32. s connected to the switch fall into this range lt is indicated on the front panel when the PoE Limit LED is ON When this condition exists the switch denies PoE power to any additional powered devices that may be connected to the switch Note See Power over Ethernet LEDs on page 22 and 23 for a detailed description of the functions indicated by the PoE Limit LED If a ports POE LED is blinking the PoE power to that port is disabled indicating that the PoE power budget is exceeded This condition occurs for one of two reasons a The demand for PoE power from the power device connected to the port is greater than 30 W The maximum amount of power any port can supply by itself is 30 W Power demands more than 30 W exceed the port s ability to deliver POE power and the PoE power delivered by that port is shut down a The total demand for PoE power on all ports is exceeding the 75 W maximum PoE power limit of the switch This condition occurs when you connect an additional power device to a switch port and the switch attempts to deliver more than the maximum PoE power limit for the switch When this situation occurs the lowest priority port s is denied PoE power so that the combined PoE power delivered to all the power devices connected to the switch remains under 75 W 27 Chapter 1 Overview Note To reset a blinking POE port LED see Resetting Blinking POE Port LED on page 51 Note In addition a blinkin
33. t place objects on top of the switch Do not expose the switch to moisture or water Ensure that the site is a dust free environment You should use dedicated power circuits or power conditioners to supply reliable electrical power to the network devices 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 35 Chapter 2 Installation 3 Verify that the shipping container includes the AT GS900 8PS Switch and the items shown below in Figure 4 TY TT TY TT IT ry YY 5 3 A 1437 r Y Y Y Two equipment brackets for wall or rack installation Eight bracket screws for wall or rack installation Four wall anchors for wall mount installation Four screws and washers for wall mount installation Four rubber feet for desktop installation One regional AC power cord One SFP slot dust cover pre installed Four screws for rack mount installation Figure 4 AT GS900 8PS Switch Items 36 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
34. t the transceiver is fully inserted in the slot 49 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 o Verify that the AT GS900 8PS is has AC power and the Power LED is on o 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 For legacy PDs check to be sure that it is designed to receive power over pins 1 2 3 and 6 on the RJ 45 port This can be verified by reviewing the device s documentation or data sheet If it is not capable of receiving power on these pairs it is incompatible with the AT GS900 8PS Note For an explanation of the PoE Guard Band see PoE Port Prioritization on page 27 Problem Port POE Status LED is Blinking If the Port PoE Status LED is blinking it indicates one of the following problems o There may be a short circuit in the Ethernet cable You can verify that the Ethernet cable does not have a short by replacing it with a cable that you know is good If the problem is resolved with the good cable then the original cable has a fault a The power demand of the PD may be overloading the port Check that the device s power requirements does not exceed
35. 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 Always keep the protective plug in the optical bore when a fiber optic cable is not installed or when storing the SFP When you do remove the plug keep it for future use Note Unnecessary removal and insertion of an SFP can lead to premature failure For information on the cable specifications of the SFP consult the documentation shipped with the SFP 6 Go to Cabling the Switch on page 45 44 Cabling the witch AT GS900 8PS Switch Installation Guide Observe the following guidelines when connecting twisted pair and fiber optic cables to the ports on the switch O 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 Because the twisted pair ports have auto MDI MDI X you may use straight through or cross over twisted pair cables to connect any type of Ethernet network devices to the switch The default speed and duplex settings for the ports are determined with Auto Negotiation The end
36. uipment rack screws provided 38 AT GS900 8PS Switch Installation Guide Figure 7 Mounting the Switch in an Equipment Rack 4 Goto Installing Optional SFP Transceiver on page 43 or Cabling the Switch on page 45 39 Chapter 2 Installation Installing the Switch on a Wall 40 To install the switch on a wall perform the following procedure 1 2 Turn the switch over and place it on a table If the rubber feet are attached to the bottom of the switch remove them using a flat head screwdriver 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 Have another person hold the switch at the wall location where the switch is to be installed while you use a pencil or pen to mark the wall with the locations of the four holes in the brackets The switch should be oriented such that its front faceplate is facing up and is level to the floor See Figure 9 on page 41 5 AT GS900 8PS Switch Installation Guide Figure 9 Marking the Screw Hole Locations 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 While another person holds the switch at the wall location secure it to the wall usi
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